stack_trace.cc revision a8883a0000a08dc4cb2bfec01cbead0da6272a5c 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <inttypes.h>
18#include <memory>
19#include <stdio.h>
20
21#include "android-base/stringprintf.h"
22
23#include "base/logging.h"
24#include "base/macros.h"
25#include "jni.h"
26#include "openjdkjvmti/jvmti.h"
27#include "ScopedLocalRef.h"
28#include "ti-agent/common_helper.h"
29#include "ti-agent/common_load.h"
30
31namespace art {
32namespace Test911GetStackTrace {
33
34using android::base::StringPrintf;
35
36static jint FindLineNumber(jint line_number_count,
37                           jvmtiLineNumberEntry* line_number_table,
38                           jlocation location) {
39  if (line_number_table == nullptr) {
40    return -2;
41  }
42
43  jint line_number = -1;
44  for (jint i = 0; i != line_number_count; ++i) {
45    if (line_number_table[i].start_location > location) {
46      return line_number;
47    }
48    line_number = line_number_table[i].line_number;
49  }
50  return line_number;
51}
52
53extern "C" JNIEXPORT jobjectArray JNICALL Java_Main_getStackTrace(
54    JNIEnv* env, jclass klass ATTRIBUTE_UNUSED, jthread thread, jint start, jint max) {
55  std::unique_ptr<jvmtiFrameInfo[]> frames(new jvmtiFrameInfo[max]);
56
57  jint count;
58  {
59    jvmtiError result = jvmti_env->GetStackTrace(thread, start, max, frames.get(), &count);
60    if (result != JVMTI_ERROR_NONE) {
61      char* err;
62      jvmti_env->GetErrorName(result, &err);
63      printf("Failure running GetStackTrace: %s\n", err);
64      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
65      return nullptr;
66    }
67  }
68
69  auto callback = [&](jint method_index) -> jobjectArray {
70    char* name;
71    char* sig;
72    char* gen;
73    {
74      jvmtiError result2 = jvmti_env->GetMethodName(frames[method_index].method, &name, &sig, &gen);
75      if (result2 != JVMTI_ERROR_NONE) {
76        char* err;
77        jvmti_env->GetErrorName(result2, &err);
78        printf("Failure running GetMethodName: %s\n", err);
79        jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
80        return nullptr;
81      }
82    }
83
84    jint line_number_count;
85    jvmtiLineNumberEntry* line_number_table;
86    {
87      jvmtiError line_result = jvmti_env->GetLineNumberTable(frames[method_index].method,
88                                                             &line_number_count,
89                                                             &line_number_table);
90      if (line_result != JVMTI_ERROR_NONE) {
91        // Accept absent info and native method errors.
92        if (line_result != JVMTI_ERROR_ABSENT_INFORMATION &&
93            line_result != JVMTI_ERROR_NATIVE_METHOD) {
94          char* err;
95          jvmti_env->GetErrorName(line_result, &err);
96          printf("Failure running GetLineNumberTable: %s\n", err);
97          jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(err));
98          return nullptr;
99        }
100        line_number_table = nullptr;
101        line_number_count = 0;
102      }
103    }
104
105    auto inner_callback = [&](jint component_index) -> jstring {
106      switch (component_index) {
107        case 0:
108          return (name == nullptr) ? nullptr : env->NewStringUTF(name);
109        case 1:
110          return (sig == nullptr) ? nullptr : env->NewStringUTF(sig);
111        case 2:
112          return env->NewStringUTF(StringPrintf("%" PRId64, frames[method_index].location).c_str());
113        case 3: {
114          jint line_number = FindLineNumber(line_number_count,
115                                            line_number_table,
116                                            frames[method_index].location);
117          return env->NewStringUTF(StringPrintf("%d", line_number).c_str());
118        }
119      }
120      LOG(FATAL) << "Unreachable";
121      UNREACHABLE();
122    };
123    jobjectArray inner_array = CreateObjectArray(env, 4, "java/lang/String", inner_callback);
124
125    if (name != nullptr) {
126      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(name));
127    }
128    if (sig != nullptr) {
129      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(sig));
130    }
131    if (gen != nullptr) {
132      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(gen));
133    }
134    if (line_number_table != nullptr) {
135      jvmti_env->Deallocate(reinterpret_cast<unsigned char*>(line_number_table));
136    }
137
138    return inner_array;
139  };
140  return CreateObjectArray(env, count, "[Ljava/lang/String;", callback);
141}
142
143}  // namespace Test911GetStackTrace
144}  // namespace art
145