Vyacheslav Egorov
f496e538f4
This is the next step towards preventing compiler from directly peeking into runtime and instead interact with runtime through a well defined surface. The goal of the refactoring to locate all places where compiler accesses some runtime information and partion those accesses into two categories: - creating objects in the host runtime (e.g. allocating strings, numbers, etc) during compilation; - accessing properties of the target runtime (e.g. offsets of fields) to embed those into the generated code; This change introduces dart::compiler and dart::compiler::target namespaces. All code in the compiler will gradually be moved into dart::compiler namespace. One of the motivations for this change is to be able to prevent access to globally defined host constants like kWordSize by shadowing them in the dart::compiler namespace. The nested namespace dart::compiler::target hosts all information about target runtime that compiler could access, e.g. compiler::target::kWordSize defines word size of the target which will eventually be made different from the host kWordSize (defined by dart::kWordSize). The API for compiler to runtime interaction is placed into compiler_api.h. Note that we still permit runtime to access compiler internals directly - this is not going to be decoupled as part of this work. Issue https://github.com/dart-lang/sdk/issues/31709 Change-Id: If4396d295879391becfa6c38d4802bbff81f5b20 Reviewed-on: https://dart-review.googlesource.com/c/90242 Commit-Queue: Vyacheslav Egorov <vegorov@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>
123 lines
4.6 KiB
C++
123 lines
4.6 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;
|
|
class RawArray;
|
|
class RawCode;
|
|
class RawFunction;
|
|
class RawObject;
|
|
|
|
// 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.
|
|
class WritableInstructionsScope : public ValueObject {
|
|
public:
|
|
WritableInstructionsScope(uword address, intptr_t size);
|
|
~WritableInstructionsScope();
|
|
|
|
private:
|
|
const uword address_;
|
|
const intptr_t size_;
|
|
};
|
|
|
|
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 RawCode* GetStaticCallTargetAt(uword return_address, const Code& code);
|
|
|
|
// Get instance call information. Returns the call target and sets each
|
|
// of the output parameters ic_data and arguments_descriptor if they are
|
|
// non-NULL.
|
|
static RawCode* GetInstanceCallAt(uword return_address,
|
|
const Code& code,
|
|
ICData* ic_data);
|
|
|
|
// Return target of an unoptimized static call and its ICData object
|
|
// (calls target via a stub).
|
|
static RawFunction* 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 RawObject* GetSwitchableCallDataAt(uword return_address,
|
|
const Code& caller_code);
|
|
static RawCode* GetSwitchableCallTargetAt(uword return_address,
|
|
const Code& caller_code);
|
|
|
|
#if defined(TARGET_ARCH_DBC)
|
|
static NativeFunctionWrapper GetNativeCallAt(uword return_address,
|
|
const Code& code,
|
|
NativeFunction* target);
|
|
#else
|
|
static RawCode* GetNativeCallAt(uword return_address,
|
|
const Code& code,
|
|
NativeFunction* target);
|
|
#endif
|
|
|
|
#if defined(TARGET_ARCH_DBC)
|
|
static void PatchNativeCallAt(uword return_address,
|
|
const Code& code,
|
|
NativeFunction target,
|
|
NativeFunctionWrapper trampoline);
|
|
#else
|
|
static void PatchNativeCallAt(uword return_address,
|
|
const Code& code,
|
|
NativeFunction target,
|
|
const Code& trampoline);
|
|
#endif
|
|
|
|
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);
|
|
|
|
class KBCPatcher : public AllStatic {
|
|
public:
|
|
static NativeFunctionWrapper GetNativeCallAt(uword return_address,
|
|
const Bytecode& bytecode,
|
|
NativeFunction* function);
|
|
|
|
static void PatchNativeCallAt(uword return_address,
|
|
const Bytecode& bytecode,
|
|
NativeFunction function,
|
|
NativeFunctionWrapper trampoline);
|
|
};
|
|
|
|
} // namespace dart
|
|
|
|
#endif // RUNTIME_VM_CODE_PATCHER_H_
|