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      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/callee_save_type.h"
     22 #include "base/enums.h"
     23 #include "base/mutex.h"
     24 #include "thread-inl.h"
     25 
     26 // Specific frame size code is in architecture-specific files. We include this to compile-time
     27 // specialize the code.
     28 #include "arch/arm/quick_method_frame_info_arm.h"
     29 #include "arch/arm64/quick_method_frame_info_arm64.h"
     30 #include "arch/mips/quick_method_frame_info_mips.h"
     31 #include "arch/mips64/quick_method_frame_info_mips64.h"
     32 #include "arch/x86/quick_method_frame_info_x86.h"
     33 #include "arch/x86_64/quick_method_frame_info_x86_64.h"
     34 
     35 namespace art {
     36 class ArtMethod;
     37 
     38 class ScopedQuickEntrypointChecks {
     39  public:
     40   explicit ScopedQuickEntrypointChecks(Thread *self,
     41                                        bool entry_check = kIsDebugBuild,
     42                                        bool exit_check = kIsDebugBuild)
     43       REQUIRES_SHARED(Locks::mutator_lock_) : self_(self), exit_check_(exit_check) {
     44     if (entry_check) {
     45       TestsOnEntry();
     46     }
     47   }
     48 
     49   ~ScopedQuickEntrypointChecks() REQUIRES_SHARED(Locks::mutator_lock_) {
     50     if (exit_check_) {
     51       TestsOnExit();
     52     }
     53   }
     54 
     55  private:
     56   void TestsOnEntry() REQUIRES_SHARED(Locks::mutator_lock_) {
     57     Locks::mutator_lock_->AssertSharedHeld(self_);
     58     self_->VerifyStack();
     59   }
     60 
     61   void TestsOnExit() REQUIRES_SHARED(Locks::mutator_lock_) {
     62     Locks::mutator_lock_->AssertSharedHeld(self_);
     63     self_->VerifyStack();
     64   }
     65 
     66   Thread* const self_;
     67   bool exit_check_;
     68 };
     69 
     70 static constexpr size_t GetCalleeSaveFrameSize(InstructionSet isa, CalleeSaveType type) {
     71   switch (isa) {
     72     case InstructionSet::kArm:
     73     case InstructionSet::kThumb2:
     74       return arm::ArmCalleeSaveFrameSize(type);
     75     case InstructionSet::kArm64:
     76       return arm64::Arm64CalleeSaveFrameSize(type);
     77     case InstructionSet::kMips:
     78       return mips::MipsCalleeSaveFrameSize(type);
     79     case InstructionSet::kMips64:
     80       return mips64::Mips64CalleeSaveFrameSize(type);
     81     case InstructionSet::kX86:
     82       return x86::X86CalleeSaveFrameSize(type);
     83     case InstructionSet::kX86_64:
     84       return x86_64::X86_64CalleeSaveFrameSize(type);
     85     case InstructionSet::kNone:
     86       LOG(FATAL) << "kNone has no frame size";
     87       UNREACHABLE();
     88   }
     89   LOG(FATAL) << "Unknown ISA " << isa;
     90   UNREACHABLE();
     91 }
     92 
     93 // Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
     94 static constexpr PointerSize GetConstExprPointerSize(InstructionSet isa) {
     95   switch (isa) {
     96     case InstructionSet::kArm:
     97     case InstructionSet::kThumb2:
     98       return kArmPointerSize;
     99     case InstructionSet::kArm64:
    100       return kArm64PointerSize;
    101     case InstructionSet::kMips:
    102       return kMipsPointerSize;
    103     case InstructionSet::kMips64:
    104       return kMips64PointerSize;
    105     case InstructionSet::kX86:
    106       return kX86PointerSize;
    107     case InstructionSet::kX86_64:
    108       return kX86_64PointerSize;
    109     case InstructionSet::kNone:
    110       LOG(FATAL) << "kNone has no pointer size";
    111       UNREACHABLE();
    112   }
    113   LOG(FATAL) << "Unknown ISA " << isa;
    114   UNREACHABLE();
    115 }
    116 
    117 // Note: this specialized statement is sanity-checked in the quick-trampoline gtest.
    118 static constexpr size_t GetCalleeSaveReturnPcOffset(InstructionSet isa, CalleeSaveType type) {
    119   return GetCalleeSaveFrameSize(isa, type) - static_cast<size_t>(GetConstExprPointerSize(isa));
    120 }
    121 
    122 }  // namespace art
    123 
    124 #endif  // ART_RUNTIME_ENTRYPOINTS_QUICK_CALLEE_SAVE_FRAME_H_
    125