crashpad/snapshot/win/cpu_context_win.h
Alex Gough a5b7e504c6 Thread snapshots on Windows can have varying size
In a future CL we will make use of InitializeContext2 which can produce
contexts of varying sizes - this makes the existing use of a union for
wow/x64 contexts no longer feasible.

The context union in process_reader_win is replaced with a (moveable,
copyable) helper struct which currently only knows how to allocate
the replaced WOW or CONTEXT sized unions.

As this field is no longer a member of the Thread struct it cannot
be passed into other functions as a reference, so instead a pointer
is used in these functions.

Bug: 1250098
Change-Id: Ied3fe971c0073bbdafc071217e1bb0f72350bb4e
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3538668
Commit-Queue: Alex Gough <ajgo@chromium.org>
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
2022-05-17 00:40:26 +00:00

60 lines
1.9 KiB
C++

// Copyright 2015 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CRASHPAD_SNAPSHOT_WIN_CPU_CONTEXT_WIN_H_
#define CRASHPAD_SNAPSHOT_WIN_CPU_CONTEXT_WIN_H_
#include <windows.h>
#include "build/build_config.h"
namespace crashpad {
struct CPUContextX86;
struct CPUContextX86_64;
struct CPUContextARM64;
#if defined(ARCH_CPU_X86) || DOXYGEN
//! \brief Initializes a CPUContextX86 structure from a native context structure
//! on Windows.
void InitializeX86Context(const CONTEXT* context, CPUContextX86* out);
#endif // ARCH_CPU_X86
#if defined(ARCH_CPU_X86_64) || DOXYGEN
//! \brief Initializes a CPUContextX86 structure from a native context structure
//! on Windows.
void InitializeX86Context(const WOW64_CONTEXT* context, CPUContextX86* out);
//! \brief Initializes a CPUContextX86_64 structure from a native context
//! structure on Windows.
//! Only reads a max of sizeof(CONTEXT) so will not initialize extended values.
void InitializeX64Context(const CONTEXT* context, CPUContextX86_64* out);
#endif // ARCH_CPU_X86_64
#if defined(ARCH_CPU_ARM64) || DOXYGEN
//! \brief Initializes a CPUContextARM64 structure from a native context
//! structure on Windows.
void InitializeARM64Context(const CONTEXT* context, CPUContextARM64* out);
#endif // ARCH_CPU_ARM64
} // namespace crashpad
#endif // CRASHPAD_SNAPSHOT_WIN_CPU_CONTEXT_WIN_H_