register_line.h revision 848f70a3d73833fc1bf3032a9ff6812e429661d9
1776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers/* 2776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Copyright (C) 2012 The Android Open Source Project 3776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 4776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Licensed under the Apache License, Version 2.0 (the "License"); 5776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * you may not use this file except in compliance with the License. 6776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * You may obtain a copy of the License at 7776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 8776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * http://www.apache.org/licenses/LICENSE-2.0 9776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 10776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Unless required by applicable law or agreed to in writing, software 11776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * distributed under the License is distributed on an "AS IS" BASIS, 12776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * See the License for the specific language governing permissions and 14776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * limitations under the License. 15776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 16776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 17fc0e3219edc9a5bf81b166e82fd5db2796eb6a0dBrian Carlstrom#ifndef ART_RUNTIME_VERIFIER_REGISTER_LINE_H_ 18fc0e3219edc9a5bf81b166e82fd5db2796eb6a0dBrian Carlstrom#define ART_RUNTIME_VERIFIER_REGISTER_LINE_H_ 19776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 20700a402244a1a423da4f3ba8032459f4b65fa18fIan Rogers#include <memory> 21776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers#include <vector> 22776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 23776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers#include "safe_map.h" 24776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 25776ac1fa61237db645adb4370a4aab888530caf4Ian Rogersnamespace art { 268e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers 278e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogersclass Instruction; 288e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers 29776ac1fa61237db645adb4370a4aab888530caf4Ian Rogersnamespace verifier { 30776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 31776ac1fa61237db645adb4370a4aab888530caf4Ian Rogersclass MethodVerifier; 328e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogersclass RegType; 33776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 34776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers/* 35776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Register type categories, for type checking. 36776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 37776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * The spec says category 1 includes boolean, byte, char, short, int, float, reference, and 38776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * returnAddress. Category 2 includes long and double. 39776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 40776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * We treat object references separately, so we have "category1nr". We don't support jsr/ret, so 41776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * there is no "returnAddress" type. 42776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 43776ac1fa61237db645adb4370a4aab888530caf4Ian Rogersenum TypeCategory { 44776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers kTypeCategoryUnknown = 0, 45776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers kTypeCategory1nr = 1, // boolean, byte, char, short, int, float 46776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers kTypeCategory2 = 2, // long, double 47776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers kTypeCategoryRef = 3, // object reference 48776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers}; 49776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 50776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers// During verification, we associate one of these with every "interesting" instruction. We track 51776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers// the status of all registers, and (if the method has any monitor-enter instructions) maintain a 52776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers// stack of entered monitors (identified by code unit offset). 53776ac1fa61237db645adb4370a4aab888530caf4Ian Rogersclass RegisterLine { 54776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers public: 55d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers static RegisterLine* Create(size_t num_regs, MethodVerifier* verifier) { 566afd409d9ff5911d7de6967836535e15219ab31fMathieu Chartier void* memory = operator new(sizeof(RegisterLine) + (num_regs * sizeof(uint16_t))); 57d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers RegisterLine* rl = new (memory) RegisterLine(num_regs, verifier); 58d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers return rl; 59776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 60776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 61776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Implement category-1 "move" instructions. Copy a 32-bit value from "vsrc" to "vdst". 627b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CopyRegister1(MethodVerifier* verifier, uint32_t vdst, uint32_t vsrc, TypeCategory cat) 63b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 64776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 65776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Implement category-2 "move" instructions. Copy a 64-bit value from "vsrc" to "vdst". This 66776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // copies both halves of the register. 677b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CopyRegister2(MethodVerifier* verifier, uint32_t vdst, uint32_t vsrc) 68b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 69776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 70776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Implement "move-result". Copy the category-1 value from the result register to another 71776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // register, and reset the result register. 727b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CopyResultRegister1(MethodVerifier* verifier, uint32_t vdst, bool is_reference) 73b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 74776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 75776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Implement "move-result-wide". Copy the category-2 value from the result register to another 76776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // register, and reset the result register. 777b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CopyResultRegister2(MethodVerifier* verifier, uint32_t vdst) 78b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 79776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 80776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Set the invisible result register to unknown 817b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void SetResultTypeToUnknown(MethodVerifier* verifier) SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 82776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 83776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Set the type of register N, verifying that the register is valid. If "newType" is the "Lo" 84776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // part of a 64-bit value, register N+1 will be set to "newType+1". 85776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // The register index was validated during the static pass, so we don't need to check it here. 867b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers ALWAYS_INLINE bool SetRegisterType(MethodVerifier* verifier, uint32_t vdst, 877b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& new_type) 88b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 89776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 907b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers bool SetRegisterTypeWide(MethodVerifier* verifier, uint32_t vdst, const RegType& new_type1, 917b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& new_type2) 922bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 932bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 94776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* Set the type of the "result" register. */ 957b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void SetResultRegisterType(MethodVerifier* verifier, const RegType& new_type) 96b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 97776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 98d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers void SetResultRegisterTypeWide(const RegType& new_type1, const RegType& new_type2) 992bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 1002bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 101776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Get the type of register vsrc. 1027b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& GetRegisterType(MethodVerifier* verifier, uint32_t vsrc) const; 103776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 1047b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers ALWAYS_INLINE bool VerifyRegisterType(MethodVerifier* verifier, uint32_t vsrc, 1057b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& check_type) 106b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 107776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 1087b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers bool VerifyRegisterTypeWide(MethodVerifier* verifier, uint32_t vsrc, const RegType& check_type1, 1097b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& check_type2) 1102bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 1112bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 112776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers void CopyFromLine(const RegisterLine* src) { 113776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers DCHECK_EQ(num_regs_, src->num_regs_); 114d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers memcpy(&line_, &src->line_, num_regs_ * sizeof(uint16_t)); 115776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers monitors_ = src->monitors_; 116776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_ = src->reg_to_lock_depths_; 117776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 118776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 1197b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers std::string Dump(MethodVerifier* verifier) const SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 120776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 121776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers void FillWithGarbage() { 122d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers memset(&line_, 0xf1, num_regs_ * sizeof(uint16_t)); 123db0cccd9a74cb9aa5f3b62f377415f653e3c0ca4Logan Chien monitors_.clear(); 124776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_.clear(); 125776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 126776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 127776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 128776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * We're creating a new instance of class C at address A. Any registers holding instances 129776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * previously created at address A must be initialized by now. If not, we mark them as "conflict" 130776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * to prevent them from being used (otherwise, MarkRefsAsInitialized would mark the old ones and 131776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * the new ones at the same time). 132776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 1337b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void MarkUninitRefsAsInvalid(MethodVerifier* verifier, const RegType& uninit_type) 134b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 135776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 136776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 137776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Update all registers holding "uninit_type" to instead hold the corresponding initialized 138776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * reference type. This is called when an appropriate constructor is invoked -- all copies of 139776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * the reference must be marked as initialized. 140776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 141848f70a3d73833fc1bf3032a9ff6812e429661d9Jeff Hao void MarkRefsAsInitialized(MethodVerifier* verifier, const RegType& uninit_type, 142848f70a3d73833fc1bf3032a9ff6812e429661d9Jeff Hao uint32_t this_reg, uint32_t dex_pc) 1432dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 144776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 145776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 146b8c7859f21f5ae4c9b90f2ef2effc51967299737Ian Rogers * Update all registers to be Conflict except vsrc. 147b8c7859f21f5ae4c9b90f2ef2effc51967299737Ian Rogers */ 1487b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void MarkAllRegistersAsConflicts(MethodVerifier* verifier); 1497b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void MarkAllRegistersAsConflictsExcept(MethodVerifier* verifier, uint32_t vsrc); 1507b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void MarkAllRegistersAsConflictsExceptWide(MethodVerifier* verifier, uint32_t vsrc); 151b8c7859f21f5ae4c9b90f2ef2effc51967299737Ian Rogers 152b8c7859f21f5ae4c9b90f2ef2effc51967299737Ian Rogers /* 153776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Check constraints on constructor return. Specifically, make sure that the "this" argument got 154776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * initialized. 155776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * The "this" argument to <init> uses code offset kUninitThisArgAddr, which puts it at the start 156776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * of the list in slot 0. If we see a register with an uninitialized slot 0 reference, we know it 157776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * somehow didn't get initialized. 158776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 1597b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers bool CheckConstructorReturn(MethodVerifier* verifier) const; 160776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 1617e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle /* 1627e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle * Check if an UninitializedThis at the specified location has been overwritten before 1637e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle * being correctly initialized. 1647e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle */ 1657e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle bool WasUninitializedThisOverwritten(MethodVerifier* verifier, size_t this_loc, 1667e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle bool was_invoke_direct) const; 1677e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle 1687e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle /* 1697e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle * Get the first location of an UninitializedThis type, or return kInvalidVreg if there are none. 1707e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle */ 1717e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle bool GetUninitializedThisLoc(MethodVerifier* verifier, size_t* vreg) const; 1727e541c91997b7747fa79014a8ea540395e54efc8Stephen Kyle 173776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Compare two register lines. Returns 0 if they match. 174776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Using this for a sort is unwise, since the value can change based on machine endianness. 175776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers int CompareLine(const RegisterLine* line2) const { 176776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers DCHECK(monitors_ == line2->monitors_); 177776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // TODO: DCHECK(reg_to_lock_depths_ == line2->reg_to_lock_depths_); 178d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers return memcmp(&line_, &line2->line_, num_regs_ * sizeof(uint16_t)); 179776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 180776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 181776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers size_t NumRegs() const { 182776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers return num_regs_; 183776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 184776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 185776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 186776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Get the "this" pointer from a non-static method invocation. This returns the RegType so the 187776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * caller can decide whether it needs the reference to be initialized or not. (Can also return 188776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * kRegTypeZero if the reference can only be zero at this point.) 189776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 190776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * The argument count is in vA, and the first argument is in vC, for both "simple" and "range" 191776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * versions. We just need to make sure vA is >= 1 and then return vC. 192091d238936809f6668ca6b7606c62bc224add430Mathieu Chartier * allow_failure will return Conflict() instead of causing a verification failure if there is an 193091d238936809f6668ca6b7606c62bc224add430Mathieu Chartier * error. 194776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 1957b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers const RegType& GetInvocationThis(MethodVerifier* verifier, const Instruction* inst, 196091d238936809f6668ca6b7606c62bc224add430Mathieu Chartier bool is_range, bool allow_failure = false) 197b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 198776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 199776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 200776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Verify types for a simple two-register instruction (e.g. "neg-int"). 201776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * "dst_type" is stored into vA, and "src_type" is verified against vB. 202776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 2037b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckUnaryOp(MethodVerifier* verifier, const Instruction* inst, const RegType& dst_type, 204d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type) 205b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 206776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2077b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckUnaryOpWide(MethodVerifier* verifier, const Instruction* inst, 208d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type1, const RegType& dst_type2, 209d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type1, const RegType& src_type2) 2102bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2112bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 2127b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckUnaryOpToWide(MethodVerifier* verifier, const Instruction* inst, 213d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type1, const RegType& dst_type2, 214d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type) 2152bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2162bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 2177b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckUnaryOpFromWide(MethodVerifier* verifier, const Instruction* inst, 218d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type, 219d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type1, const RegType& src_type2) 2202bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2212bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 222776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 223776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Verify types for a simple three-register instruction (e.g. "add-int"). 224776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * "dst_type" is stored into vA, and "src_type1"/"src_type2" are verified 225776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * against vB/vC. 226776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 2277b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOp(MethodVerifier* verifier, const Instruction* inst, 228d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type, const RegType& src_type1, const RegType& src_type2, 22900f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers bool check_boolean_op) 230b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 231776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2327b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOpWide(MethodVerifier* verifier, const Instruction* inst, 233d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type1, const RegType& dst_type2, 234d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type1_1, const RegType& src_type1_2, 235d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type2_1, const RegType& src_type2_2) 2362bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2372bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 2387b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOpWideShift(MethodVerifier* verifier, const Instruction* inst, 239d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& long_lo_type, const RegType& long_hi_type, 240d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& int_type) 2412bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2422bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 243776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 244776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Verify types for a binary "2addr" operation. "src_type1"/"src_type2" 245776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * are verified against vA/vB, then "dst_type" is stored into vA. 246776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 2477b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOp2addr(MethodVerifier* verifier, const Instruction* inst, 248d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type, 249d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type1, const RegType& src_type2, 25000f7d0eaa6bd93d33bf0c1429bf4ba0b3f28abacIan Rogers bool check_boolean_op) 251b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 252776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2537b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOp2addrWide(MethodVerifier* verifier, const Instruction* inst, 254d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type1, const RegType& dst_type2, 255d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type1_1, const RegType& src_type1_2, 256d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& src_type2_1, const RegType& src_type2_2) 2572bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2582bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 2597b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckBinaryOp2addrWideShift(MethodVerifier* verifier, const Instruction* inst, 260d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& long_lo_type, const RegType& long_hi_type, 261d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& int_type) 2622bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 2632bcb4a496b7aa00d996df3a070524f7568fb35a1Ian Rogers 264776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers /* 265776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * Verify types for A two-register instruction with a literal constant (e.g. "add-int/lit8"). 266776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * "dst_type" is stored into vA, and "src_type" is verified against vB. 267776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * 268776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers * If "check_boolean_op" is set, we use the constant value in vC. 269776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers */ 2707b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void CheckLiteralOp(MethodVerifier* verifier, const Instruction* inst, 271d8f69b086baf6717ce949d1c4de90d73b91083b0Ian Rogers const RegType& dst_type, const RegType& src_type, 2725243e912875026f99428088db7e80cb11651d64eSebastien Hertz bool check_boolean_op, bool is_lit16) 273b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 274776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 275776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Verify/push monitor onto the monitor stack, locking the value in reg_idx at location insn_idx. 2767b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void PushMonitor(MethodVerifier* verifier, uint32_t reg_idx, int32_t insn_idx) 2777b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 278776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 279776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Verify/pop monitor from monitor stack ensuring that we believe the monitor is locked 2807b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void PopMonitor(MethodVerifier* verifier, uint32_t reg_idx) 2817b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 282776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 283776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Stack of currently held monitors and where they were locked 284776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers size_t MonitorStackDepth() const { 285776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers return monitors_.size(); 286776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 287776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 288776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // We expect no monitors to be held at certain points, such a method returns. Verify the stack 289776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // is empty, failing and returning false if not. 2907b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers bool VerifyMonitorStackEmpty(MethodVerifier* verifier) const; 291776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2927b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers bool MergeRegisters(MethodVerifier* verifier, const RegisterLine* incoming_line) 293b726dcb581bf72da46527378ccb6889020f0e6e9Ian Rogers SHARED_LOCKS_REQUIRED(Locks::mutator_lock_); 294776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2958e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers size_t GetMaxNonZeroReferenceReg(MethodVerifier* verifier, size_t max_ref_reg) const; 296776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 2977b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers // Write a bit at each register location that holds a reference. 2987b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers void WriteReferenceBitMap(MethodVerifier* verifier, std::vector<uint8_t>* data, size_t max_bytes); 299776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 30008fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes size_t GetMonitorEnterCount() { 30108fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes return monitors_.size(); 30208fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes } 30308fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes 30408fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes uint32_t GetMonitorEnterDexPc(size_t i) { 30508fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes return monitors_[i]; 30608fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes } 30708fc03ae5dded4adc9b45b7014a4b9dfedbe95a6Elliott Hughes 308a21039c3ae2b20e44ceb2735251c04d0aac89afdElliott Hughes private: 309776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers void CopyRegToLockDepth(size_t dst, size_t src) { 310bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier auto it = reg_to_lock_depths_.find(src); 311776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers if (it != reg_to_lock_depths_.end()) { 312776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_.Put(dst, it->second); 313776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 314776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 315776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 316776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers bool IsSetLockDepth(size_t reg, size_t depth) { 317bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier auto it = reg_to_lock_depths_.find(reg); 318776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers if (it != reg_to_lock_depths_.end()) { 319776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers return (it->second & (1 << depth)) != 0; 320776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } else { 321776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers return false; 322776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 323776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 324776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 3258e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers bool SetRegToLockDepth(size_t reg, size_t depth) { 326776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers CHECK_LT(depth, 32u); 3278e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers if (IsSetLockDepth(reg, depth)) { 3288e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers return false; // Register already holds lock so locking twice is erroneous. 3298e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers } 330bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier auto it = reg_to_lock_depths_.find(reg); 331776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers if (it == reg_to_lock_depths_.end()) { 332776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_.Put(reg, 1 << depth); 333776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } else { 334776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers it->second |= (1 << depth); 335776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 3368e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers return true; 337776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 338776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 339776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers void ClearRegToLockDepth(size_t reg, size_t depth) { 340776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers CHECK_LT(depth, 32u); 341776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers DCHECK(IsSetLockDepth(reg, depth)); 342bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier auto it = reg_to_lock_depths_.find(reg); 343776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers DCHECK(it != reg_to_lock_depths_.end()); 344776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers uint32_t depths = it->second ^ (1 << depth); 345776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers if (depths != 0) { 346776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers it->second = depths; 347776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } else { 348776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_.erase(it); 349776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 350776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 351776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 352776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers void ClearAllRegToLockDepths(size_t reg) { 353776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers reg_to_lock_depths_.erase(reg); 354776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers } 355776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 356d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers RegisterLine(size_t num_regs, MethodVerifier* verifier) 3577b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers : num_regs_(num_regs) { 358d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers memset(&line_, 0, num_regs_ * sizeof(uint16_t)); 3597b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers SetResultTypeToUnknown(verifier); 360d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers } 361d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers 3628e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers // Storage for the result register's type, valid after an invocation. 363776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers uint16_t result_[2]; 364776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 365776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // Length of reg_types_ 366ad0b3a35857d2cd2db720028ebc51176191e2219Ian Rogers const uint32_t num_regs_; 3677b078e8c04f3e1451dbdd18543c8b9692b5b067eIan Rogers 3688e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers // A stack of monitor enter locations. 369bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier std::vector<uint32_t, TrackingAllocator<uint32_t, kAllocatorTagVerifier>> monitors_; 370776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // A map from register to a bit vector of indices into the monitors_ stack. As we pop the monitor 371776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers // stack we verify that monitor-enter/exit are correctly nested. That is, if there was a 3728e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers // monitor-enter on v5 and then on v6, we expect the monitor-exit to be on v6 then on v5. 373bad0267eaab9d6a522d05469ff90501deefdb88bMathieu Chartier AllocationTrackingSafeMap<uint32_t, uint32_t, kAllocatorTagVerifier> reg_to_lock_depths_; 374d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers 375d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers // An array of RegType Ids associated with each dex register. 376d0fbd85a82a266c21d6b72c61d6dc098ec362de7Ian Rogers uint16_t line_[0]; 3778e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers 3788e1f4f8f848f2dbb36265a019310498a61cd674dIan Rogers DISALLOW_COPY_AND_ASSIGN(RegisterLine); 379776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers}; 380776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 381776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers} // namespace verifier 382776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers} // namespace art 383776ac1fa61237db645adb4370a4aab888530caf4Ian Rogers 384fc0e3219edc9a5bf81b166e82fd5db2796eb6a0dBrian Carlstrom#endif // ART_RUNTIME_VERIFIER_REGISTER_LINE_H_ 385