Exception.cpp revision 8552f4498a720a6fcb34ebab69d6e3c34bee491d
1f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 2f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Copyright (C) 2008 The Android Open Source Project 3f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 4f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 5f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * you may not use this file except in compliance with the License. 6f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * You may obtain a copy of the License at 7f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 8f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 9f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 10f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 11f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 12f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * See the License for the specific language governing permissions and 14f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * limitations under the License. 15f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 16f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 17f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Exception handling. 18f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 19f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include "Dalvik.h" 20f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include "libdex/DexCatch.h" 21f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 22f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project#include <stdlib.h> 23f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 24f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 25f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectNotes on Exception Handling 26f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 27f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectWe have one fairly sticky issue to deal with: creating the exception stack 28f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projecttrace. The trouble is that we need the current value of the program 29f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectcounter for the method now being executed, but that's only held in a local 30f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvariable or hardware register in the main interpreter loop. 31f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 32f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectThe exception mechanism requires that the current stack trace be associated 33f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectwith a Throwable at the time the Throwable is constructed. The construction 34f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectmay or may not be associated with a throw. We have three situations to 35f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectconsider: 36f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 37f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (1) A Throwable is created with a "new Throwable" statement in the 38f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project application code, for immediate or deferred use with a "throw" statement. 39f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (2) The VM throws an exception from within the interpreter core, e.g. 40f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project after an integer divide-by-zero. 41f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (3) The VM throws an exception from somewhere deeper down, e.g. while 42f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project trying to link a class. 43f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 44f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectWe need to have the current value for the PC, which means that for 45f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectsituation (3) the interpreter loop must copy it to an externally-accessible 46f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectlocation before handling any opcode that could cause the VM to throw 47f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectan exception. We can't store it globally, because the various threads 48f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectwould trample each other. We can't store it in the Thread structure, 49f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbecause it'll get overwritten as soon as the Throwable constructor starts 50f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectexecuting. It needs to go on the stack, but our stack frames hold the 51f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectcaller's *saved* PC, not the current PC. 52f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 53f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectSituation #1 doesn't require special handling. Situation #2 could be dealt 54f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectwith by passing the PC into the exception creation function. The trick 55f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectis to solve situation #3 in a way that adds minimal overhead to common 56f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectoperations. Making it more costly to throw an exception is acceptable. 57f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 58f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectThere are a few ways to deal with this: 59f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 60f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (a) Change "savedPc" to "currentPc" in the stack frame. All of the 61f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stack logic gets offset by one frame. The current PC is written 62f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project to the current stack frame when necessary. 63f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (b) Write the current PC into the current stack frame, but without 64f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project replacing "savedPc". The JNI local refs pointer, which is only 65f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project used for native code, can be overloaded to save space. 66f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (c) In dvmThrowException(), push an extra stack frame on, with the 67f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project current PC in it. The current PC is written into the Thread struct 68f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project when necessary, and copied out when the VM throws. 69f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (d) Before doing something that might throw an exception, push a 70f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project temporary frame on with the saved PC in it. 71f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 72f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectSolution (a) is the simplest, but breaks Dalvik's goal of mingling native 73f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectand interpreted stacks. 74f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 75f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectSolution (b) retains the simplicity of (a) without rearranging the stack, 76f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbut now in some cases we're storing the PC twice, which feels wrong. 77f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 78f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectSolution (c) usually works, because we push the saved PC onto the stack 79f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbefore the Throwable construction can overwrite the copy in Thread. One 80f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectway solution (c) could break is: 81f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project - Interpreter saves the PC 82f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project - Execute some bytecode, which runs successfully (and alters the saved PC) 83f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project - Throw an exception before re-saving the PC (i.e in the same opcode) 84f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectThis is a risk for anything that could cause <clinit> to execute, e.g. 85f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectexecuting a static method or accessing a static field. Attemping to access 86f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projecta field that doesn't exist in a class that does exist might cause this. 87f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectIt may be possible to simply bracket the dvmCallMethod*() functions to 88f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectsave/restore it. 89f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 90f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectSolution (d) incurs additional overhead, but may have other benefits (e.g. 91f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectit's easy to find the stack frames that should be removed before storage 92f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectin the Throwable). 93f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 94f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectCurrent plan is option (b), because it's simple, fast, and doesn't change 95f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectthe way the stack works. 96f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project*/ 97f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 98f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* fwd */ 99f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectstatic bool initException(Object* exception, const char* msg, Object* cause, 100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Thread* self); 101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 103f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 104f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Cache pointers to some of the exception classes we use locally. 105686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * 106686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * Note this is NOT called during dexopt optimization. Some of the fields 107686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * are initialized by the verifier (dvmVerifyCodeFlow). 108f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 109f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbool dvmExceptionStartup(void) 110f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 111f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangThrowable = 112f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindSystemClassNoInit("Ljava/lang/Throwable;"); 113f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangRuntimeException = 114f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindSystemClassNoInit("Ljava/lang/RuntimeException;"); 1154fbba1f95b3e27bdc5f5572bb0420b5f928aa54eAndy McFadden gDvm.classJavaLangStackOverflowError = 1164fbba1f95b3e27bdc5f5572bb0420b5f928aa54eAndy McFadden dvmFindSystemClassNoInit("Ljava/lang/StackOverflowError;"); 117f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangError = 118f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindSystemClassNoInit("Ljava/lang/Error;"); 119f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangStackTraceElement = 120f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindSystemClassNoInit("Ljava/lang/StackTraceElement;"); 121f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangStackTraceElementArray = 122f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindArrayClass("[Ljava/lang/StackTraceElement;", NULL); 123f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (gDvm.classJavaLangThrowable == NULL || 124f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangStackTraceElement == NULL || 125f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.classJavaLangStackTraceElementArray == NULL) 126f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project { 127f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("Could not find one or more essential exception classes\n"); 128f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 129f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 130f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 131f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 132f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Find the constructor. Note that, unlike other saved method lookups, 133f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * we're using a Method* instead of a vtable offset. This is because 134f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * constructors don't have vtable offsets. (Also, since we're creating 135f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the object in question, it's impossible for anyone to sub-class it.) 136f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 137f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* meth; 138f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project meth = dvmFindDirectMethodByDescriptor(gDvm.classJavaLangStackTraceElement, 139f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "<init>", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V"); 140f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (meth == NULL) { 141f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("Unable to find constructor for StackTraceElement\n"); 142f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 143f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 144f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.methJavaLangStackTraceElement_init = meth; 145f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 146f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* grab an offset for the stackData field */ 147f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.offJavaLangThrowable_stackState = 148f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindFieldOffset(gDvm.classJavaLangThrowable, 149f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "stackState", "Ljava/lang/Object;"); 150f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (gDvm.offJavaLangThrowable_stackState < 0) { 151f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("Unable to find Throwable.stackState\n"); 152f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 153f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 154f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 155f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* and one for the cause field, just 'cause */ 156f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.offJavaLangThrowable_cause = 157f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmFindFieldOffset(gDvm.classJavaLangThrowable, 158f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "cause", "Ljava/lang/Throwable;"); 159f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (gDvm.offJavaLangThrowable_cause < 0) { 160f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("Unable to find Throwable.cause\n"); 161f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 162f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 163f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 164f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return true; 165f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 166f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 167f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 168f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Clean up. 169f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 170f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmExceptionShutdown(void) 171f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 172f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // nothing to do 173f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 174f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 175f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 176f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 1770171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden * Format the message into a small buffer and pass it along. 1780171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden */ 1790171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFaddenvoid dvmThrowExceptionFmtV(const char* exceptionDescriptor, const char* fmt, 1800171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden va_list args) 1810171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden{ 1820171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden char msgBuf[512]; 1830171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden 1840171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden vsnprintf(msgBuf, sizeof(msgBuf), fmt, args); 1850171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden dvmThrowChainedException(exceptionDescriptor, msgBuf, NULL); 1860171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden} 1870171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden 1880171812e59e2520a4345b9bbadd4f7afa0a1de16Andy McFadden/* 189f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Create a Throwable and throw an exception in the current thread (where 190f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "throwing" just means "set the thread's exception pointer"). 191f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 192f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "msg" and/or "cause" may be NULL. 193f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 194f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If we have a bad exception hierarchy -- something in Throwable.<init> 195f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * is missing -- then every attempt to throw an exception will result 196f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * in another exception. Exceptions are generally allowed to "chain" 197f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * to other exceptions, so it's hard to auto-detect this problem. It can 198f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * only happen if the system classes are broken, so it's probably not 199f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * worth spending cycles to detect it. 200f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 201f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We do have one case to worry about: if the classpath is completely 202f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * wrong, we'll go into a death spin during startup because we can't find 203f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the initial class and then we can't find NoClassDefFoundError. We have 204f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * to handle this case. 205f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 206f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * [Do we want to cache pointers to common exception classes?] 207f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 208f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmThrowChainedException(const char* exceptionDescriptor, const char* msg, 209f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* cause) 210f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 211f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ClassObject* excepClass; 212f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 213f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGV("THROW '%s' msg='%s' cause=%s\n", 214f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exceptionDescriptor, msg, 215f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (cause != NULL) ? cause->clazz->descriptor : "(none)"); 216f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 217f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (gDvm.initializing) { 218f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (++gDvm.initExceptionCount >= 2) { 219f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("Too many exceptions during init (failed on '%s' '%s')\n", 220f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exceptionDescriptor, msg); 221f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmAbort(); 222f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 223f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 224f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 225f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass = dvmFindSystemClass(exceptionDescriptor); 226f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (excepClass == NULL) { 227f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 228f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We couldn't find the exception class. The attempt to find a 229f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * nonexistent class should have raised an exception. If no 230f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * exception is currently raised, then we're pretty clearly unable 231f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * to throw ANY sort of exception, and we need to pack it in. 232f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 233f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If we were able to throw the "class load failed" exception, 234f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * stick with that. Ideally we'd stuff the original exception 235f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * into the "cause" field, but since we can't find it we can't 236f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * do that. The exception class name should be in the "message" 237f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * field. 238f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 239f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmCheckException(dvmThreadSelf())) { 240f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("FATAL: unable to throw exception (failed on '%s' '%s')\n", 241f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exceptionDescriptor, msg); 242f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmAbort(); 243f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 244f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 245f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 246f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 247f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmThrowChainedExceptionByClass(excepClass, msg, cause); 248f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 249f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 250f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 251f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Start/continue throwing process now that we have a class reference. 252f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 253f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmThrowChainedExceptionByClass(ClassObject* excepClass, const char* msg, 254f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* cause) 255f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 256f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Thread* self = dvmThreadSelf(); 257f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* exception; 258f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 259f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* make sure the exception is initialized */ 260f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsClassInitialized(excepClass) && !dvmInitClass(excepClass)) { 261f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("ERROR: unable to initialize exception class '%s'\n", 262f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass->descriptor); 263f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (strcmp(excepClass->descriptor, "Ljava/lang/InternalError;") == 0) 264f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmAbort(); 265f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmThrowChainedException("Ljava/lang/InternalError;", 266f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "failed to init original exception class", cause); 267f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 268f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 269f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 270f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception = dvmAllocObject(excepClass, ALLOC_DEFAULT); 271f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (exception == NULL) { 272f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 273f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We're in a lot of trouble. We might be in the process of 274f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * throwing an out-of-memory exception, in which case the 275f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * pre-allocated object will have been thrown when our object alloc 276f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * failed. So long as there's an exception raised, return and 277f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * allow the system to try to recover. If not, something is broken 278f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * and we need to bail out. 279f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 280f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmCheckException(self)) 281f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 282f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGE("FATAL: unable to allocate exception '%s' '%s'\n", 283f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass->descriptor, msg != NULL ? msg : "(no msg)"); 284f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmAbort(); 285f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 286f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 287f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 288f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Init the exception. 289f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 290f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (gDvm.optimizing) { 291f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* need the exception object, but can't invoke interpreted code */ 292f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGV("Skipping init of exception %s '%s'\n", 293f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass->descriptor, msg); 294f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 295f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(excepClass == exception->clazz); 296f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!initException(exception, msg, cause, self)) { 297f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 298f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Whoops. If we can't initialize the exception, we can't use 299f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * it. If there's an exception already set, the constructor 300f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * probably threw an OutOfMemoryError. 301f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 302f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmCheckException(self)) { 303f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 304f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We're required to throw something, so we just 305f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * throw the pre-constructed internal error. 306f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 307f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = gDvm.internalErrorObj; 308f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 309f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 310f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 311f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 312f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 313f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = exception; 314f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 315f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbail: 316f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc(exception, self); 317f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 318f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 319f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 320f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Throw the named exception using the dotted form of the class 321f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * descriptor as the exception message, and with the specified cause. 322f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 323f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmThrowChainedExceptionWithClassMessage(const char* exceptionDescriptor, 324f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const char* messageDescriptor, Object* cause) 325f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 326f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char* message = dvmDescriptorToDot(messageDescriptor); 327f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 328f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmThrowChainedException(exceptionDescriptor, message, cause); 329f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project free(message); 330f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 331f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 332f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 333f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Like dvmThrowExceptionWithMessageFromDescriptor, but take a 334f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * class object instead of a name. 335f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 336f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmThrowExceptionByClassWithClassMessage(ClassObject* exceptionClass, 337f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const char* messageDescriptor) 338f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 339f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char* message = dvmDescriptorToName(messageDescriptor); 340f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 341f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmThrowExceptionByClass(exceptionClass, message); 342f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project free(message); 343f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 344f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 345f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 3464a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * Find and return an exception constructor method that can take the 3474a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * indicated parameters, or return NULL if no such constructor exists. 3484a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein */ 3494a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornsteinstatic Method* findExceptionInitMethod(ClassObject* excepClass, 3504a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein bool hasMessage, bool hasCause) 3514a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein{ 3524a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein if (hasMessage) { 3534a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein Method* result; 3544a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein 3554a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein if (hasCause) { 3564a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein result = dvmFindDirectMethodByDescriptor( 3574a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein excepClass, "<init>", 3584a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein "(Ljava/lang/String;Ljava/lang/Throwable;)V"); 3594a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } else { 3604a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein result = dvmFindDirectMethodByDescriptor( 3614a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein excepClass, "<init>", "(Ljava/lang/String;)V"); 3624a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } 3634a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein 3644a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein if (result != NULL) { 3654a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein return result; 3664a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } 3674a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein 3684a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein if (hasCause) { 3694a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein return dvmFindDirectMethodByDescriptor( 3704a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein excepClass, "<init>", 3714a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein "(Ljava/lang/Object;Ljava/lang/Throwable;)V"); 3724a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } else { 3734a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein return dvmFindDirectMethodByDescriptor( 3744a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein excepClass, "<init>", "(Ljava/lang/Object;)V"); 3754a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } 3764a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } else if (hasCause) { 3774a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein return dvmFindDirectMethodByDescriptor( 3784a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein excepClass, "<init>", "(Ljava/lang/Throwable;)V"); 3794a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } else { 3804a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein return dvmFindDirectMethodByDescriptor(excepClass, "<init>", "()V"); 3814a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } 3824a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein} 3834a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein 3844a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein/* 385f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Initialize an exception with an appropriate constructor. 386f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 387f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "exception" is the exception object to initialize. 388f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Either or both of "msg" and "cause" may be null. 389f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "self" is dvmThreadSelf(), passed in so we don't have to look it up again. 390f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 391f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If the process of initializing the exception causes another 392f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * exception (e.g., OutOfMemoryError) to be thrown, return an error 393f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * and leave self->exception intact. 394f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 395f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectstatic bool initException(Object* exception, const char* msg, Object* cause, 396f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Thread* self) 397f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 398f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project enum { 399f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project kInitUnknown, 400f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project kInitNoarg, 401f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project kInitMsg, 402f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project kInitMsgThrow, 403f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project kInitThrow 404f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } initKind = kInitUnknown; 405f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* initMethod = NULL; 406f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ClassObject* excepClass = exception->clazz; 407f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StringObject* msgStr = NULL; 408f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project bool result = false; 409f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project bool needInitCause = false; 410f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 411f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(self != NULL); 412f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(self->exception == NULL); 413f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 414f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* if we have a message, create a String */ 415f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (msg == NULL) 416f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project msgStr = NULL; 417f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project else { 41881f3ebe03cd33c9003641084bece0604ee68bf88Barry Hayes msgStr = dvmCreateStringFromCstr(msg); 419f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (msgStr == NULL) { 420f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("Could not allocate message string \"%s\" while " 421f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "throwing internal exception (%s)\n", 422f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project msg, excepClass->descriptor); 423f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 424f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 425f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 426f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 427686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden if (cause != NULL) { 428686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden if (!dvmInstanceof(cause->clazz, gDvm.classJavaLangThrowable)) { 429686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden LOGE("Tried to init exception with cause '%s'\n", 430686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden cause->clazz->descriptor); 431686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden dvmAbort(); 432686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden } 433686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden } 434686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden 435f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 436f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The Throwable class has four public constructors: 437f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (1) Throwable() 438f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (2) Throwable(String message) 439f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (3) Throwable(String message, Throwable cause) (added in 1.4) 440f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (4) Throwable(Throwable cause) (added in 1.4) 441f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 442f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The first two are part of the original design, and most exception 443f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * classes should support them. The third prototype was used by 444f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * individual exceptions. e.g. ClassNotFoundException added it in 1.2. 445f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The general "cause" mechanism was added in 1.4. Some classes, 446f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * such as IllegalArgumentException, initially supported the first 447f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * two, but added the second two in a later release. 448f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 449f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Exceptions may be picky about how their "cause" field is initialized. 450f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If you call ClassNotFoundException(String), it may choose to 451f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * initialize its "cause" field to null. Doing so prevents future 452f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * calls to Throwable.initCause(). 453f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 454f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * So, if "cause" is not NULL, we need to look for a constructor that 455f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * takes a throwable. If we can't find one, we fall back on calling 456f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * #1/#2 and making a separate call to initCause(). Passing a null ref 457f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * for "message" into Throwable(String, Throwable) is allowed, but we 458f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * prefer to use the Throwable-only version because it has different 459f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * behavior. 460f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 461f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * java.lang.TypeNotPresentException is a strange case -- it has #3 but 462f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * not #2. (Some might argue that the constructor is actually not #3, 463f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * because it doesn't take the message string as an argument, but it 464f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * has the same effect and we can work with it here.) 4654a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * 4664a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * java.lang.AssertionError is also a strange case -- it has a 4674a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * constructor that takes an Object, but not one that takes a String. 4684a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * There may be other cases like this, as well, so we generally look 4694a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * for an Object-taking constructor if we can't find one that takes 4704a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein * a String. 471f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 472f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (cause == NULL) { 473f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (msgStr == NULL) { 4744a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, false, false); 475f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitNoarg; 476f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 4774a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, true, false); 478f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initMethod != NULL) { 479f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitMsg; 480f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 481f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* no #2, try #3 */ 4824a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, true, true); 4834a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein if (initMethod != NULL) { 484f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitMsgThrow; 4854a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein } 486f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 487f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 488f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 489f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (msgStr == NULL) { 4904a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, false, true); 491f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initMethod != NULL) { 492f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitThrow; 493f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 4944a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, false, false); 495f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitNoarg; 496f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project needInitCause = true; 497f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 498f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 4994a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, true, true); 500f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initMethod != NULL) { 501f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitMsgThrow; 502f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 5034a888b09be2ade9fc5bb0137f702b3be889679a9Dan Bornstein initMethod = findExceptionInitMethod(excepClass, true, false); 504f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initKind = kInitMsg; 505f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project needInitCause = true; 506f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 507f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 508f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 509f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 510f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initMethod == NULL) { 511f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 512f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We can't find the desired constructor. This can happen if a 513f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * subclass of java/lang/Throwable doesn't define an expected 514f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * constructor, e.g. it doesn't provide one that takes a string 515f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * when a message has been provided. 516f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 517f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("WARNING: exception class '%s' missing constructor " 518f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "(msg='%s' kind=%d)\n", 519f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass->descriptor, msg, initKind); 520f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(strcmp(excepClass->descriptor, 521f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "Ljava/lang/RuntimeException;") != 0); 522de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro dvmThrowChainedException("Ljava/lang/RuntimeException;", 523f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "re-throw on exception class missing constructor", NULL); 524f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 525f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 526f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 527f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 528f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Call the constructor with the appropriate arguments. 529f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 530f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project JValue unused; 531f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project switch (initKind) { 532f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case kInitNoarg: 533f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGVV("+++ exc noarg (ic=%d)\n", needInitCause); 534f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initMethod, exception, &unused); 535f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 536f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case kInitMsg: 537f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGVV("+++ exc msg (ic=%d)\n", needInitCause); 538f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initMethod, exception, &unused, msgStr); 539f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 540f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case kInitThrow: 541f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGVV("+++ exc throw"); 542f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(!needInitCause); 543f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initMethod, exception, &unused, cause); 544f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 545f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project case kInitMsgThrow: 546f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGVV("+++ exc msg+throw"); 547f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(!needInitCause); 548f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initMethod, exception, &unused, msgStr, cause); 549f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 550f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project default: 551f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(false); 552f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 553f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 554f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 555f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 556f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * It's possible the constructor has thrown an exception. If so, we 557f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * return an error and let our caller deal with it. 558f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 559f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (self->exception != NULL) { 560f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("Exception thrown (%s) while throwing internal exception (%s)\n", 561f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception->clazz->descriptor, exception->clazz->descriptor); 562f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 563f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 564f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 565f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 566f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If this exception was caused by another exception, and we weren't 567f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * able to find a cause-setting constructor, set the "cause" field 568f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * with an explicit call. 569f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 570f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (needInitCause) { 571f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* initCause; 572f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initCause = dvmFindVirtualMethodHierByDescriptor(excepClass, "initCause", 573f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "(Ljava/lang/Throwable;)Ljava/lang/Throwable;"); 574f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initCause != NULL) { 575f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initCause, exception, &unused, cause); 576f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (self->exception != NULL) { 577f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* initCause() threw an exception; return an error and 578f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * let the caller deal with it. 579f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 580f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("Exception thrown (%s) during initCause() " 581f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "of internal exception (%s)\n", 582f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception->clazz->descriptor, 583f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception->clazz->descriptor); 584f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 585f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 586f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 587f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("WARNING: couldn't find initCause in '%s'\n", 588f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project excepClass->descriptor); 589f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 590f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 591f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 592f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 593f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project result = true; 594f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 595f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbail: 596f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) msgStr, self); // NULL is ok 597f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return result; 598f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 599f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 600f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 601f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 602f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Clear the pending exception and the "initExceptionCount" counter. This 603f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * is used by the optimization and verification code, which has to run with 604f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "initializing" set to avoid going into a death-spin if the "class not 605f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * found" exception can't be found. 606f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 607f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * This can also be called when the VM is in a "normal" state, e.g. when 608f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * verifying classes that couldn't be verified at optimization time. The 609f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * reset of initExceptionCount should be harmless in that case. 610f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 611f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmClearOptException(Thread* self) 612f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 613f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = NULL; 614f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.initExceptionCount = 0; 615f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 616f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 617f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 618f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns "true" if this is a "checked" exception, i.e. it's a subclass 619f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * of Throwable (assumed) but not a subclass of RuntimeException or Error. 620f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 621f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbool dvmIsCheckedException(const Object* exception) 622f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 623f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmInstanceof(exception->clazz, gDvm.classJavaLangError) || 624f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmInstanceof(exception->clazz, gDvm.classJavaLangRuntimeException)) 625f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project { 626f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return false; 627f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 628f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return true; 629f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 630f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 631f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 632f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 633f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Wrap the now-pending exception in a different exception. This is useful 634f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * for reflection stuff that wants to hand a checked exception back from a 635f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * method that doesn't declare it. 636f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 637f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If something fails, an (unchecked) exception related to that failure 638f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * will be pending instead. 639f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 640f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmWrapException(const char* newExcepStr) 641f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 642f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Thread* self = dvmThreadSelf(); 643f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* origExcep; 644f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ClassObject* iteClass; 645f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 646f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project origExcep = dvmGetException(self); 647f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmAddTrackedAlloc(origExcep, self); // don't let the GC free it 648f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 649f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmClearException(self); // clear before class lookup 650f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project iteClass = dvmFindSystemClass(newExcepStr); 651f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (iteClass != NULL) { 652f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* iteExcep; 653f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* initMethod; 654f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 655f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project iteExcep = dvmAllocObject(iteClass, ALLOC_DEFAULT); 656f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (iteExcep != NULL) { 657f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project initMethod = dvmFindDirectMethodByDescriptor(iteClass, "<init>", 658f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "(Ljava/lang/Throwable;)V"); 659f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (initMethod != NULL) { 660f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project JValue unused; 661f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, initMethod, iteExcep, &unused, 662f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project origExcep); 663f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 664f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* if <init> succeeded, replace the old exception */ 665f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmCheckException(self)) 666f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmSetException(self, iteExcep); 667f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 668f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc(iteExcep, NULL); 669f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 670f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* if initMethod doesn't exist, or failed... */ 671f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmCheckException(self)) 672f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmSetException(self, origExcep); 673f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 674f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* leave OutOfMemoryError pending */ 675f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 676f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 677f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* leave ClassNotFoundException pending */ 678f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 679f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 680f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(dvmCheckException(self)); 681f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc(origExcep, self); 682f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 683f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 684f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 685686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * Get the "cause" field from an exception. 686686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * 687686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * The Throwable class initializes the "cause" field to "this" to 688686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * differentiate between being initialized to null and never being 689686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden * initialized. We check for that here and convert it to NULL. 690686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden */ 691686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFaddenObject* dvmGetExceptionCause(const Object* exception) 692686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden{ 693686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden if (!dvmInstanceof(exception->clazz, gDvm.classJavaLangThrowable)) { 694686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden LOGE("Tried to get cause from object of type '%s'\n", 695686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden exception->clazz->descriptor); 696686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden dvmAbort(); 697686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden } 698686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden Object* cause = 699686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden dvmGetFieldObject(exception, gDvm.offJavaLangThrowable_cause); 700686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden if (cause == exception) 701686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden return NULL; 702686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden else 703686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden return cause; 704686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden} 705686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden 706686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden/* 707f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Print the stack trace of the current exception on stderr. This is called 708f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * from the JNI ExceptionDescribe call. 709f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 710f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * For consistency we just invoke the Throwable printStackTrace method, 711f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * which might be overridden in the exception object. 712f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 713f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Exceptions thrown during the course of printing the stack trace are 714f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * ignored. 715f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 716f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmPrintExceptionStackTrace(void) 717f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 718f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Thread* self = dvmThreadSelf(); 719f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* exception; 720f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* printMethod; 721f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 722f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception = self->exception; 723f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (exception == NULL) 724f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 725f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 726f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = NULL; 727f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project printMethod = dvmFindVirtualMethodHierByDescriptor(exception->clazz, 728f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "printStackTrace", "()V"); 729f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (printMethod != NULL) { 730f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project JValue unused; 731f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(self, printMethod, exception, &unused); 732f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 733f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("WARNING: could not find printStackTrace in %s\n", 734f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception->clazz->descriptor); 735f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 736f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 737f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (self->exception != NULL) { 73822680eee4aa012c839568d83a132b2b20ff39525Elliott Hughes LOGW("NOTE: exception thrown while printing stack trace: %s\n", 739f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception->clazz->descriptor); 740f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 741f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 742f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = exception; 743f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 744f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 745f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 746f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Search the method's list of exceptions for a match. 747f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 748f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns the offset of the catch block on success, or -1 on failure. 749f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 750f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectstatic int findCatchInMethod(Thread* self, const Method* method, int relPc, 751f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ClassObject* excepClass) 752f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 753f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 754f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Need to clear the exception before entry. Otherwise, dvmResolveClass 755f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * might think somebody threw an exception while it was loading a class. 756f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 757f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(!dvmCheckException(self)); 758f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(!dvmIsNativeMethod(method)); 759f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 760f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGVV("findCatchInMethod %s.%s excep=%s depth=%d\n", 761f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project method->clazz->descriptor, method->name, excepClass->descriptor, 762f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmComputeExactFrameDepth(self->curFrame)); 763f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 764f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project DvmDex* pDvmDex = method->clazz->pDvmDex; 765f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const DexCode* pCode = dvmGetMethodCode(method); 766f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project DexCatchIterator iterator; 767f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 768f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dexFindCatchHandler(&iterator, pCode, relPc)) { 769f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project for (;;) { 770f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project DexCatchHandler* handler = dexCatchIteratorNext(&iterator); 771f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 772f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (handler == NULL) { 773f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 774f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 775de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro 776f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (handler->typeIdx == kDexNoIndex) { 777f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* catch-all */ 778f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGV("Match on catch-all block at 0x%02x in %s.%s for %s\n", 779f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project relPc, method->clazz->descriptor, 780f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project method->name, excepClass->descriptor); 781f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return handler->address; 782f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 783f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 784f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ClassObject* throwable = 785f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmDexGetResolvedClass(pDvmDex, handler->typeIdx); 786f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (throwable == NULL) { 787f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 788f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * TODO: this behaves badly if we run off the stack 789f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * while trying to throw an exception. The problem is 790f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * that, if we're in a class loaded by a class loader, 791f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the call to dvmResolveClass has to ask the class 792f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * loader for help resolving any previously-unresolved 793f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * classes. If this particular class loader hasn't 794f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * resolved StackOverflowError, it will call into 795f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * interpreted code, and blow up. 796f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 797f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We currently replace the previous exception with 798f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the StackOverflowError, which means they won't be 799f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * catching it *unless* they explicitly catch 800f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * StackOverflowError, in which case we'll be unable 801f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * to resolve the class referred to by the "catch" 802f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * block. 803f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 804f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We end up getting a huge pile of warnings if we do 805f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * a simple synthetic test, because this method gets 806f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * called on every stack frame up the tree, and it 807f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * fails every time. 808f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 809f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * This eventually bails out, effectively becoming an 810f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * uncatchable exception, so other than the flurry of 811f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * warnings it's not really a problem. Still, we could 812f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * probably handle this better. 813f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 814f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project throwable = dvmResolveClass(method->clazz, handler->typeIdx, 815f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project true); 816f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (throwable == NULL) { 817f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 818f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We couldn't find the exception they wanted in 819f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * our class files (or, perhaps, the stack blew up 820f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * while we were querying a class loader). Cough 821f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * up a warning, then move on to the next entry. 822f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Keep the exception status clear. 823f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 824f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("Could not resolve class ref'ed in exception " 825f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project "catch list (class index %d, exception %s)\n", 826f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project handler->typeIdx, 827f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project (self->exception != NULL) ? 828f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception->clazz->descriptor : "(none)"); 829f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmClearException(self); 830f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project continue; 831f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 832f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 833f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 834f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project //LOGD("ADDR MATCH, check %s instanceof %s\n", 835f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // excepClass->descriptor, pEntry->excepClass->descriptor); 836f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 837f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmInstanceof(excepClass, throwable)) { 838f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGV("Match on catch block at 0x%02x in %s.%s for %s\n", 839f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project relPc, method->clazz->descriptor, 840f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project method->name, excepClass->descriptor); 841f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return handler->address; 842f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 843f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 844f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 845f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 846f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGV("No matching catch block at 0x%02x in %s for %s\n", 847f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project relPc, method->name, excepClass->descriptor); 848f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return -1; 849f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 850f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 851f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 852f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Find a matching "catch" block. "pc" is the relative PC within the 853f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * current method, indicating the offset from the start in 16-bit units. 854f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 855f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Returns the offset to the catch block, or -1 if we run up against a 856f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * break frame without finding anything. 857f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 858f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The class resolution stuff we have to do while evaluating the "catch" 859f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * blocks could cause an exception. The caller should clear the exception 860f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * before calling here and restore it after. 861f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 862f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Sets *newFrame to the frame pointer of the frame with the catch block. 863f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If "scanOnly" is false, self->curFrame is also set to this value. 864f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 865f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectint dvmFindCatchBlock(Thread* self, int relPc, Object* exception, 866f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project bool scanOnly, void** newFrame) 867f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 868f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project void* fp = self->curFrame; 869f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int catchAddr = -1; 870f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 871f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(!dvmCheckException(self)); 872f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 873f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (true) { 874f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StackSaveArea* saveArea = SAVEAREA_FROM_FP(fp); 875f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project catchAddr = findCatchInMethod(self, saveArea->method, relPc, 876f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception->clazz); 877f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (catchAddr >= 0) 878f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 879f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 880f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 881f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Normally we'd check for ACC_SYNCHRONIZED methods and unlock 882f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * them as we unroll. Dalvik uses what amount to generated 883f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "finally" blocks to take care of this for us. 884f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 885f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 886f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* output method profiling info */ 887f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!scanOnly) { 888f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project TRACE_METHOD_UNROLL(self, saveArea->method); 889f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 890f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 891f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 892f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Move up one frame. If the next thing up is a break frame, 893f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * break out now so we're left unrolled to the last method frame. 894f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We need to point there so we can roll up the JNI local refs 895f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * if this was a native method. 896f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 897f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(saveArea->prevFrame != NULL); 898f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmIsBreakFrame(saveArea->prevFrame)) { 899f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!scanOnly) 900f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; // bail with catchAddr == -1 901f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 902f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 903f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We're scanning for the debugger. It needs to know if this 904f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * exception is going to be caught or not, and we need to figure 905f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * out if it will be caught *ever* not just between the current 906f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * position and the next break frame. We can't tell what native 907f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * code is going to do, so we assume it never catches exceptions. 908f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 909f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Start by finding an interpreted code frame. 910f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 911f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; // this is the break frame 912f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project saveArea = SAVEAREA_FROM_FP(fp); 913f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; // this may be a good one 914f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (fp != NULL) { 915f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsBreakFrame(fp)) { 916f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project saveArea = SAVEAREA_FROM_FP(fp); 917f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsNativeMethod(saveArea->method)) 918f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 919f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 920f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 921f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = SAVEAREA_FROM_FP(fp)->prevFrame; 922f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 923f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (fp == NULL) 924f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; // bail with catchAddr == -1 925f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 926f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 927f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Now fp points to the "good" frame. When the interp code 928f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * invoked the native code, it saved a copy of its current PC 929f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * into xtra.currentPc. Pull it out of there. 930f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 931f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project relPc = 932f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project saveArea->xtra.currentPc - SAVEAREA_FROM_FP(fp)->method->insns; 933f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 934f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; 935f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 936f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* savedPc in was-current frame goes with method in now-current */ 937f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project relPc = saveArea->savedPc - SAVEAREA_FROM_FP(fp)->method->insns; 938f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 939f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 940f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 941f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!scanOnly) 942f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->curFrame = fp; 943f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 944f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 945f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The class resolution in findCatchInMethod() could cause an exception. 946f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Clear it to be safe. 947f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 948f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project self->exception = NULL; 949f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 950f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *newFrame = fp; 951f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return catchAddr; 952f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 953f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 954f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 955f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We have to carry the exception's stack trace around, but in many cases 956f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * it will never be examined. It makes sense to keep it in a compact, 957f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * VM-specific object, rather than an array of Objects with strings. 958f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 959f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Pass in the thread whose stack we're interested in. If "thread" is 960f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * not self, the thread must be suspended. This implies that the thread 961f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * list lock is held, which means we can't allocate objects or we risk 962f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * jamming the GC. So, we allow this function to return different formats. 963f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (This shouldn't be called directly -- see the inline functions in the 964f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * header file.) 965f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 966f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * If "wantObject" is true, this returns a newly-allocated Object, which is 967f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * presently an array of integers, but could become something else in the 968f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * future. If "wantObject" is false, return plain malloc data. 969f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 970f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * NOTE: if we support class unloading, we will need to scan the class 971f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * object references out of these arrays. 972f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 973f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid* dvmFillInStackTraceInternal(Thread* thread, bool wantObject, int* pCount) 974f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 975f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ArrayObject* stackData = NULL; 976f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int* simpleData = NULL; 977f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project void* fp; 978f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project void* startFp; 979f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int stackDepth; 980f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int* intPtr; 981f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 982f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (pCount != NULL) 983f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *pCount = 0; 984f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = thread->curFrame; 985f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 986f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(thread == dvmThreadSelf() || dvmIsSuspended(thread)); 987f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 988f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 989f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We're looking at a stack frame for code running below a Throwable 990f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * constructor. We want to remove the Throwable methods and the 991f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * superclass initializations so the user doesn't see them when they 992f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * read the stack dump. 993f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 994f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * TODO: this just scrapes off the top layers of Throwable. Might not do 995f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the right thing if we create an exception object or cause a VM 996f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * exception while in a Throwable method. 997f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 998f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (fp != NULL) { 999f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const StackSaveArea* saveArea = SAVEAREA_FROM_FP(fp); 1000f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const Method* method = saveArea->method; 1001f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1002f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmIsBreakFrame(fp)) 1003f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 1004f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmInstanceof(method->clazz, gDvm.classJavaLangThrowable)) 1005f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 1006f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project //LOGD("EXCEP: ignoring %s.%s\n", 1007f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // method->clazz->descriptor, method->name); 1008f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; 1009f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1010f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project startFp = fp; 1011f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1012f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 1013f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Compute the stack depth. 1014f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1015f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackDepth = 0; 1016f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (fp != NULL) { 1017f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const StackSaveArea* saveArea = SAVEAREA_FROM_FP(fp); 1018f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1019f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsBreakFrame(fp)) 1020f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackDepth++; 1021f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1022f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(fp != saveArea->prevFrame); 1023f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; 1024f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1025f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project //LOGD("EXCEP: stack depth is %d\n", stackDepth); 1026f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1027f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!stackDepth) 1028f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1029f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1030f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 1031f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We need to store a pointer to the Method and the program counter. 1032f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We have 4-byte pointers, so we use '[I'. 1033f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1034f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (wantObject) { 1035f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(sizeof(Method*) == 4); 1036f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackData = dvmAllocPrimitiveArray('I', stackDepth*2, ALLOC_DEFAULT); 1037f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (stackData == NULL) { 1038f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(dvmCheckException(dvmThreadSelf())); 1039f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1040f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1041f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project intPtr = (int*) stackData->contents; 1042f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 1043f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* array of ints; first entry is stack depth */ 1044f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(sizeof(Method*) == sizeof(int)); 1045f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project simpleData = (int*) malloc(sizeof(int) * stackDepth*2); 1046f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (simpleData == NULL) 1047f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1048f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1049f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(pCount != NULL); 1050f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project intPtr = simpleData; 1051f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1052f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (pCount != NULL) 1053f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *pCount = stackDepth; 1054f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1055f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = startFp; 1056f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project while (fp != NULL) { 1057f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const StackSaveArea* saveArea = SAVEAREA_FROM_FP(fp); 1058f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const Method* method = saveArea->method; 1059f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1060f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsBreakFrame(fp)) { 1061f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project //LOGD("EXCEP keeping %s.%s\n", method->clazz->descriptor, 1062f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // method->name); 1063f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1064f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *intPtr++ = (int) method; 1065f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmIsNativeMethod(method)) { 1066f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *intPtr++ = 0; /* no saved PC for native methods */ 1067f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 1068f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(saveArea->xtra.currentPc >= method->insns && 1069de75089fb7216d19e9c22cce4dc62a49513477d3Carl Shapiro saveArea->xtra.currentPc < 1070f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project method->insns + dvmGetMethodInsnsSize(method)); 1071f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project *intPtr++ = (int) (saveArea->xtra.currentPc - method->insns); 1072f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1073f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1074f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackDepth--; // for verification 1075f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1076f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1077f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(fp != saveArea->prevFrame); 1078f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fp = saveArea->prevFrame; 1079f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1080f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project assert(stackDepth == 0); 1081f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1082f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbail: 1083f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (wantObject) { 1084f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) stackData, dvmThreadSelf()); 1085f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return stackData; 1086f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 1087f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return simpleData; 1088f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1089f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1090f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1091f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1092f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 1093f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Given an Object previously created by dvmFillInStackTrace(), use the 1094f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * contents of the saved stack trace to generate an array of 1095f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * java/lang/StackTraceElement objects. 1096f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 1097f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The returned array is not added to the "local refs" list. 1098f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1099f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectArrayObject* dvmGetStackTrace(const Object* ostackData) 1100f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 1101f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const ArrayObject* stackData = (const ArrayObject*) ostackData; 1102f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const int* intVals; 1103e3c01dac83e6eea7f82fe81ed89cfbdd9791dbc9Carl Shapiro int stackSize; 1104f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1105f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackSize = stackData->length / 2; 1106f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project intVals = (const int*) stackData->contents; 1107f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return dvmGetStackTraceRaw(intVals, stackSize); 1108f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1109f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1110f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 1111f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Generate an array of StackTraceElement objects from the raw integer 1112f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * data encoded by dvmFillInStackTrace(). 1113f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 1114f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * "intVals" points to the first {method,pc} pair. 1115f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * 1116f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * The returned array is not added to the "local refs" list. 1117f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1118f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source ProjectArrayObject* dvmGetStackTraceRaw(const int* intVals, int stackDepth) 1119f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 1120f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ArrayObject* steArray = NULL; 1121f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int i; 1122f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1123f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* init this if we haven't yet */ 1124f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (!dvmIsClassInitialized(gDvm.classJavaLangStackTraceElement)) 1125f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmInitClass(gDvm.classJavaLangStackTraceElement); 1126f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1127f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* allocate a StackTraceElement array */ 1128f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project steArray = dvmAllocArray(gDvm.classJavaLangStackTraceElementArray, 1129f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackDepth, kObjectArrayRefWidth, ALLOC_DEFAULT); 1130f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (steArray == NULL) 1131f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1132f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1133f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 1134f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Allocate and initialize a StackTraceElement for each stack frame. 1135f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * We use the standard constructor to configure the object. 1136f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1137f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project for (i = 0; i < stackDepth; i++) { 1138f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* ste; 1139f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* meth; 1140f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StringObject* className; 1141f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StringObject* methodName; 1142f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StringObject* fileName; 1143f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int lineNumber, pc; 1144f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const char* sourceFile; 1145f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char* dotName; 1146f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1147f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ste = dvmAllocObject(gDvm.classJavaLangStackTraceElement,ALLOC_DEFAULT); 1148f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (ste == NULL) 1149f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1150f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1151f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project meth = (Method*) *intVals++; 1152f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project pc = *intVals++; 1153f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1154f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (pc == -1) // broken top frame? 1155f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project lineNumber = 0; 1156f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project else 1157f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project lineNumber = dvmLineNumFromPC(meth, pc); 1158f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1159f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dotName = dvmDescriptorToDot(meth->clazz->descriptor); 116081f3ebe03cd33c9003641084bece0604ee68bf88Barry Hayes className = dvmCreateStringFromCstr(dotName); 1161f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project free(dotName); 1162f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 116381f3ebe03cd33c9003641084bece0604ee68bf88Barry Hayes methodName = dvmCreateStringFromCstr(meth->name); 1164f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project sourceFile = dvmGetMethodSourceFile(meth); 1165f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (sourceFile != NULL) 116681f3ebe03cd33c9003641084bece0604ee68bf88Barry Hayes fileName = dvmCreateStringFromCstr(sourceFile); 1167f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project else 1168f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project fileName = NULL; 1169f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1170f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 1171f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Invoke: 1172f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * public StackTraceElement(String declaringClass, String methodName, 1173f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * String fileName, int lineNumber) 1174f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * (where lineNumber==-2 means "native") 1175f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1176f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project JValue unused; 1177f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmCallMethod(dvmThreadSelf(), gDvm.methJavaLangStackTraceElement_init, 1178f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project ste, &unused, className, methodName, fileName, lineNumber); 1179f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1180f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc(ste, NULL); 1181f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) className, NULL); 1182f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) methodName, NULL); 1183f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) fileName, NULL); 1184f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1185f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmCheckException(dvmThreadSelf())) 1186f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project goto bail; 1187f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1188364f9d924cbd9d392744a66f80cc084c3d80caf0Barry Hayes dvmSetObjectArrayElement(steArray, i, ste); 1189f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1190f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1191f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectbail: 1192f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmReleaseTrackedAlloc((Object*) steArray, NULL); 1193f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return steArray; 1194f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1195f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1196f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 1197f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Dump the contents of a raw stack trace to the log. 1198f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1199f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmLogRawStackTrace(const int* intVals, int stackDepth) 1200f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 1201f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int i; 1202f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1203f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project /* 1204f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Run through the array of stack frame data. 1205f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1206f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project for (i = 0; i < stackDepth; i++) { 1207f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Method* meth; 1208f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int lineNumber, pc; 1209f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const char* sourceFile; 1210f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char* dotName; 1211f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1212f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project meth = (Method*) *intVals++; 1213f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project pc = *intVals++; 1214f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1215f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (pc == -1) // broken top frame? 1216f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project lineNumber = 0; 1217f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project else 1218f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project lineNumber = dvmLineNumFromPC(meth, pc); 1219f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1220f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project // probably don't need to do this, but it looks nicer 1221f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dotName = dvmDescriptorToDot(meth->clazz->descriptor); 1222f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1223f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (dvmIsNativeMethod(meth)) { 1224f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGI("\tat %s.%s(Native Method)\n", dotName, meth->name); 1225f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 1226f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGI("\tat %s.%s(%s:%d)\n", 1227f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dotName, meth->name, dvmGetMethodSourceFile(meth), 1228f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmLineNumFromPC(meth, pc)); 1229f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1230f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1231f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project free(dotName); 1232f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1233f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project sourceFile = dvmGetMethodSourceFile(meth); 1234f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1235f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1236f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1237f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 12388552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * Get the message string. We'd like to just grab the field out of 12398552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * Throwable, but the getMessage() function can be overridden by the 12408552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * sub-class. 12418552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * 12428552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * Returns the message string object, or NULL if it wasn't set or 12438552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * we encountered a failure trying to retrieve it. The string will 12448552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden * be added to the tracked references table. 12458552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden */ 12468552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFaddenstatic StringObject* getExceptionMessage(Object* exception) 12478552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden{ 12488552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden Thread* self = dvmThreadSelf(); 12498552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden Method* getMessageMethod; 12508552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden StringObject* messageStr = NULL; 12518552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12528552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden assert(exception == self->exception); 12538552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden self->exception = NULL; 12548552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12558552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden getMessageMethod = dvmFindVirtualMethodHierByDescriptor(exception->clazz, 12568552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden "getMessage", "()Ljava/lang/String;"); 12578552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden if (getMessageMethod != NULL) { 12588552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden /* could be in NATIVE mode from CheckJNI, so switch state */ 12598552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden ThreadStatus oldStatus = dvmChangeStatus(self, THREAD_RUNNING); 12608552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden JValue result; 12618552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12628552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden dvmCallMethod(self, getMessageMethod, exception, &result); 12638552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden messageStr = (StringObject*) result.l; 12648552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden dvmAddTrackedAlloc((Object*) messageStr, self); 12658552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12668552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden dvmChangeStatus(self, oldStatus); 12678552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden } else { 12688552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden LOGW("WARNING: could not find getMessage in %s\n", 12698552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden exception->clazz->descriptor); 12708552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden } 12718552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12728552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden if (self->exception != NULL) { 12738552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden LOGW("NOTE: exception thrown while retrieving exception message: %s\n", 12748552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden self->exception->clazz->descriptor); 12758552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden } 12768552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12778552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden self->exception = exception; 12788552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden return messageStr; 12798552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden} 12808552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 12818552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden/* 1282f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Print the direct stack trace of the given exception to the log. 1283f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1284f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectstatic void logStackTraceOf(Object* exception) 1285f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 1286f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const ArrayObject* stackData; 1287f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project StringObject* messageStr; 1288f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project int stackSize; 1289f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project const int* intVals; 1290de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden char* className; 1291f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1292de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden className = dvmDescriptorToDot(exception->clazz->descriptor); 12938552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden messageStr = getExceptionMessage(exception); 1294f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (messageStr != NULL) { 1295f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project char* cp = dvmCreateCstrFromString(messageStr); 12968552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden dvmReleaseTrackedAlloc((Object*) messageStr, dvmThreadSelf()); 12978552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden messageStr = NULL; 12988552f4498a720a6fcb34ebab69d6e3c34bee491dAndy McFadden 1299de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden LOGI("%s: %s\n", className, cp); 1300f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project free(cp); 1301f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } else { 1302de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden LOGI("%s:\n", className); 1303f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1304de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden free(className); 1305f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1306de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden /* 1307de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden * This relies on the stackState field, which contains the "raw" 1308de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden * form of the stack. The Throwable class may clear this field 1309de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden * after it generates the "cooked" form, in which case we'll have 1310de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden * nothing to show. 1311de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden */ 1312f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackData = (const ArrayObject*) dvmGetFieldObject(exception, 1313f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project gDvm.offJavaLangThrowable_stackState); 1314f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (stackData == NULL) { 1315de952db74f54108630a3dd24af0b38e583b62ed3Andy McFadden LOGI(" (raw stack trace not found)\n"); 1316f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 1317f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1318f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1319f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project stackSize = stackData->length / 2; 1320f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project intVals = (const int*) stackData->contents; 1321f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1322f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project dvmLogRawStackTrace(intVals, stackSize); 1323f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1324f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1325f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project/* 1326f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * Print the stack trace of the current thread's exception, as well as 1327f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the stack traces of any chained exceptions, to the log. We extract 1328f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * the stored stack trace and process it internally instead of calling 1329f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project * interpreted code. 1330f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project */ 1331f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Projectvoid dvmLogExceptionStackTrace(void) 1332f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project{ 1333f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* exception = dvmThreadSelf()->exception; 1334f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project Object* cause; 1335f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1336f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project if (exception == NULL) { 1337f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGW("tried to log a null exception?\n"); 1338f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project return; 1339f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1340f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project 1341f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project for (;;) { 1342f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project logStackTraceOf(exception); 1343686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden cause = dvmGetExceptionCause(exception); 1344686e1e23324f1c1f358f29f13f23e57b41c00eaaAndy McFadden if (cause == NULL) { 1345f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project break; 1346f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1347f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project LOGI("Caused by:\n"); 1348f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project exception = cause; 1349f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project } 1350f6c387128427e121477c1b32ad35cdcaa5101ba3The Android Open Source Project} 1351