mirror of
https://github.com/dart-lang/sdk
synced 2024-10-14 23:28:09 +00:00
f9a6a5bdd2
TEST=build Change-Id: I2834ef7cf7cb7c8770f8167a2438cbedcee5c623 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/292063 Commit-Queue: Ryan Macnak <rmacnak@google.com> Reviewed-by: Alexander Aprelev <aam@google.com>
113 lines
4.7 KiB
C++
113 lines
4.7 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
|
|
// for details. All rights reserved. Use of this source code is governed by a
|
|
// BSD-style license that can be found in the LICENSE file.
|
|
// Class for patching compiled code.
|
|
|
|
#ifndef RUNTIME_VM_CODE_PATCHER_H_
|
|
#define RUNTIME_VM_CODE_PATCHER_H_
|
|
|
|
#include "vm/allocation.h"
|
|
#include "vm/native_entry.h"
|
|
|
|
namespace dart {
|
|
|
|
// Forward declaration.
|
|
class Code;
|
|
class ICData;
|
|
|
|
#if defined(TARGET_ARCH_IA32)
|
|
// Stack-allocated class to create a scope where the specified region
|
|
// [address, address + size] has write access enabled. This is used
|
|
// when patching generated code. Access is reset to read-execute in
|
|
// the destructor of this scope.
|
|
// Dual mapping of instructions pages is not supported on these target arch.
|
|
class WritableInstructionsScope : public ValueObject {
|
|
public:
|
|
WritableInstructionsScope(uword address, intptr_t size);
|
|
~WritableInstructionsScope();
|
|
|
|
private:
|
|
const uword address_;
|
|
const intptr_t size_;
|
|
};
|
|
#endif // defined(TARGET_ARCH_IA32)
|
|
|
|
class CodePatcher : public AllStatic {
|
|
public:
|
|
// Dart static calls have a distinct, machine-dependent code pattern.
|
|
|
|
// Patch static call before return_address in given code to the new target.
|
|
static void PatchStaticCallAt(uword return_address,
|
|
const Code& code,
|
|
const Code& new_target);
|
|
|
|
// Return the target address of the static call before return_address
|
|
// in given code.
|
|
static CodePtr GetStaticCallTargetAt(uword return_address, const Code& code);
|
|
|
|
// Get instance call information. Returns the call target and sets the output
|
|
// parameter data if non-null.
|
|
static CodePtr GetInstanceCallAt(uword return_address,
|
|
const Code& caller_code,
|
|
Object* data);
|
|
|
|
// Change the state of an instance call by patching the corresponding object
|
|
// pool entries (non-IA32) or instructions (IA32).
|
|
static void PatchInstanceCallAt(uword return_address,
|
|
const Code& caller_code,
|
|
const Object& data,
|
|
const Code& target);
|
|
static void PatchInstanceCallAtWithMutatorsStopped(Thread* thread,
|
|
uword return_address,
|
|
const Code& caller_code,
|
|
const Object& data,
|
|
const Code& target);
|
|
|
|
// Return target of an unoptimized static call and its ICData object
|
|
// (calls target via a stub).
|
|
static FunctionPtr GetUnoptimizedStaticCallAt(uword return_address,
|
|
const Code& code,
|
|
ICData* ic_data);
|
|
|
|
static void InsertDeoptimizationCallAt(uword start);
|
|
|
|
static void PatchPoolPointerCallAt(uword return_address,
|
|
const Code& code,
|
|
const Code& new_target);
|
|
|
|
static void PatchSwitchableCallAt(uword return_address,
|
|
const Code& caller_code,
|
|
const Object& data,
|
|
const Code& target);
|
|
static void PatchSwitchableCallAtWithMutatorsStopped(Thread* thread,
|
|
uword return_address,
|
|
const Code& caller_code,
|
|
const Object& data,
|
|
const Code& target);
|
|
static ObjectPtr GetSwitchableCallDataAt(uword return_address,
|
|
const Code& caller_code);
|
|
static uword GetSwitchableCallTargetEntryAt(uword return_address,
|
|
const Code& caller_code);
|
|
|
|
static CodePtr GetNativeCallAt(uword return_address,
|
|
const Code& caller_code,
|
|
NativeFunction* target);
|
|
|
|
static void PatchNativeCallAt(uword return_address,
|
|
const Code& caller_code,
|
|
NativeFunction target,
|
|
const Code& trampoline);
|
|
|
|
static intptr_t GetSubtypeTestCachePoolIndex(uword return_address);
|
|
};
|
|
|
|
// Beginning from [end - size] we compare [size] bytes with [pattern]. All
|
|
// [0..255] values in [pattern] have to match, negative values are skipped.
|
|
//
|
|
// Example pattern: `[0x3d, 0x8b, -1, -1]`.
|
|
bool MatchesPattern(uword end, const int16_t* pattern, intptr_t size);
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_CODE_PATCHER_H_
|