1 /*
2 * Copyright (C) 2012 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 #ifndef ART_RUNTIME_ENTRYPOINTS_QUICK_CALLEE_SAVE_FRAME_H_
18 #define ART_RUNTIME_ENTRYPOINTS_QUICK_CALLEE_SAVE_FRAME_H_
19
20 #include "arch/instruction_set.h"
21 #include "base/mutex.h"
22 #include "runtime.h"
23 #include "thread-inl.h"
24
25 // Specific frame size code is in architecture-specific files. We include this to compile-time
26 // specialize the code.
27 #include "arch/arm/quick_method_frame_info_arm.h"
28 #include "arch/arm64/quick_method_frame_info_arm64.h"
29 #include "arch/mips/quick_method_frame_info_mips.h"
30 #include "arch/mips64/quick_method_frame_info_mips64.h"
31 #include "arch/x86/quick_method_frame_info_x86.h"
32 #include "arch/x86_64/quick_method_frame_info_x86_64.h"
33
34 namespace art {
35 class ArtMethod;
36
37 class ScopedQuickEntrypointChecks {
38 public:
39 explicit ScopedQuickEntrypointChecks(Thread *self,
40 bool entry_check = kIsDebugBuild,
41 bool exit_check = kIsDebugBuild)
SHARED_REQUIRES(Locks::mutator_lock_)42 SHARED_REQUIRES(Locks::mutator_lock_) : self_(self), exit_check_(exit_check) {
43 if (entry_check) {
44 TestsOnEntry();
45 }
46 }
47
SHARED_REQUIRES(Locks::mutator_lock_)48 ScopedQuickEntrypointChecks() SHARED_REQUIRES(Locks::mutator_lock_)
49 : self_(kIsDebugBuild ? Thread::Current() : nullptr), exit_check_(kIsDebugBuild) {
50 if (kIsDebugBuild) {
51 TestsOnEntry();
52 }
53 }
54
SHARED_REQUIRES(Locks::mutator_lock_)55 ~ScopedQuickEntrypointChecks() SHARED_REQUIRES(Locks::mutator_lock_) {
56 if (exit_check_) {
57 TestsOnExit();
58 }
59 }
60
61 private:
TestsOnEntry()62 void TestsOnEntry() SHARED_REQUIRES(Locks::mutator_lock_) {
63 Locks::mutator_lock_->AssertSharedHeld(self_);
64 self_->VerifyStack();
65 }
66
TestsOnExit()67 void TestsOnExit() SHARED_REQUIRES(Locks::mutator_lock_) {
68 Locks::mutator_lock_->AssertSharedHeld(self_);
69 self_->VerifyStack();
70 }
71
72 Thread* const self_;
73 bool exit_check_;
74 };
75
GetCalleeSaveFrameSize(InstructionSet isa,Runtime::CalleeSaveType type)76 static constexpr size_t GetCalleeSaveFrameSize(InstructionSet isa, Runtime::CalleeSaveType type) {
77 // constexpr must be a return statement.
78 return (isa == kArm || isa == kThumb2) ? arm::ArmCalleeSaveFrameSize(type) :
79 isa == kArm64 ? arm64::Arm64CalleeSaveFrameSize(type) :
80 isa == kMips ? mips::MipsCalleeSaveFrameSize(type) :
81 isa == kMips64 ? mips64::Mips64CalleeSaveFrameSize(type) :
82 isa == kX86 ? x86::X86CalleeSaveFrameSize(type) :
83 isa == kX86_64 ? x86_64::X86_64CalleeSaveFrameSize(type) :
84 isa == kNone ? (LOG(FATAL) << "kNone has no frame size", 0) :
85 (LOG(FATAL) << "Unknown instruction set" << isa, 0);
86 }
87
88 // Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
GetConstExprPointerSize(InstructionSet isa)89 static constexpr size_t GetConstExprPointerSize(InstructionSet isa) {
90 // constexpr must be a return statement.
91 return (isa == kArm || isa == kThumb2) ? kArmPointerSize :
92 isa == kArm64 ? kArm64PointerSize :
93 isa == kMips ? kMipsPointerSize :
94 isa == kMips64 ? kMips64PointerSize :
95 isa == kX86 ? kX86PointerSize :
96 isa == kX86_64 ? kX86_64PointerSize :
97 isa == kNone ? (LOG(FATAL) << "kNone has no pointer size", 0) :
98 (LOG(FATAL) << "Unknown instruction set" << isa, 0);
99 }
100
101 // Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
GetCalleeSaveReturnPcOffset(InstructionSet isa,Runtime::CalleeSaveType type)102 static constexpr size_t GetCalleeSaveReturnPcOffset(InstructionSet isa,
103 Runtime::CalleeSaveType type) {
104 return GetCalleeSaveFrameSize(isa, type) - GetConstExprPointerSize(isa);
105 }
106
107 } // namespace art
108
109 #endif // ART_RUNTIME_ENTRYPOINTS_QUICK_CALLEE_SAVE_FRAME_H_
110