mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-28 15:50:26 +08:00
b0cf01978d
Just avoid the Mac-specific __attribute__ tagging for now. There will need to be some Windows-specific pragmas added here once the reader has been written. R=mark@chromium.org BUG=crashpad:1 Review URL: https://codereview.chromium.org/808623002
95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
// Copyright 2014 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.
|
||
|
||
#include "client/crashpad_info.h"
|
||
|
||
#include "build/build_config.h"
|
||
#include "util/stdlib/cxx.h"
|
||
|
||
#if defined(OS_MACOSX)
|
||
#include <mach-o/loader.h>
|
||
#endif
|
||
|
||
#if CXX_LIBRARY_VERSION >= 2011
|
||
#include <type_traits>
|
||
#endif
|
||
|
||
namespace {
|
||
|
||
static const uint32_t kCrashpadInfoVersion = 1;
|
||
|
||
} // namespace
|
||
|
||
namespace crashpad {
|
||
|
||
#if CXX_LIBRARY_VERSION >= 2011 || DOXYGEN
|
||
// In C++11, check that CrashpadInfo has standard layout, which is what is
|
||
// actually important.
|
||
static_assert(std::is_standard_layout<CrashpadInfo>::value,
|
||
"CrashpadInfo must be standard layout");
|
||
#else
|
||
// In C++98 (ISO 14882), section 9.5.1 says that a union cannot have a member
|
||
// with a non-trivial ctor, copy ctor, dtor, or assignment operator. Use this
|
||
// property to ensure that CrashpadInfo remains POD. This doesn’t work for C++11
|
||
// because the requirements for unions have been relaxed.
|
||
union Compile_Assert {
|
||
CrashpadInfo Compile_Assert__CrashpadInfo_must_be_pod;
|
||
};
|
||
#endif
|
||
|
||
// This structure needs to be stored somewhere that is easy to find without
|
||
// external information.
|
||
//
|
||
// It isn’t placed in an unnamed namespace: hopefully, this will catch attempts
|
||
// to place multiple copies of this structure into the same module. If that’s
|
||
// attempted, and the name of the symbol is the same in each translation unit,
|
||
// it will result in a linker error, which is better than having multiple
|
||
// structures show up.
|
||
//
|
||
// This may result in a static module initializer in debug-mode builds, but
|
||
// because it’s POD, no code should need to run to initialize this under
|
||
// release-mode optimization.
|
||
#if defined(OS_MACOSX)
|
||
|
||
// Put the structure in __DATA,__crashpad_info where it can be easily found
|
||
// without having to consult the symbol table. The “used” attribute prevents it
|
||
// from being dead-stripped.
|
||
__attribute__((section(SEG_DATA ",__crashpad_info"),
|
||
used,
|
||
visibility("hidden"))) CrashpadInfo g_crashpad_info;
|
||
|
||
#elif defined(OS_WIN)
|
||
|
||
// TODO(scottmg): Tag in a way that makes it easy to locate on Windows.
|
||
CrashpadInfo g_crashpad_info;
|
||
|
||
#endif
|
||
|
||
// static
|
||
CrashpadInfo* CrashpadInfo::GetCrashpadInfo() {
|
||
return &g_crashpad_info;
|
||
}
|
||
|
||
CrashpadInfo::CrashpadInfo()
|
||
: signature_(kSignature),
|
||
size_(sizeof(*this)),
|
||
version_(kCrashpadInfoVersion),
|
||
padding_0_(0),
|
||
simple_annotations_(nullptr) {
|
||
}
|
||
|
||
const uint32_t CrashpadInfo::kSignature;
|
||
|
||
} // namespace crashpad
|