105 lines
3.1 KiB
C++
105 lines
3.1 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/location.h"
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#if defined(COMPILER_MSVC)
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#include <intrin.h>
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#endif
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#include "base/compiler_specific.h"
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#include "base/strings/string_number_conversions.h"
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#include "base/strings/stringprintf.h"
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#include "build/build_config.h"
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namespace base {
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Location::Location() = default;
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Location::Location(const Location& other) = default;
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Location::Location(const char* file_name, const void* program_counter)
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: file_name_(file_name), program_counter_(program_counter) {}
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Location::Location(const char* function_name,
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const char* file_name,
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int line_number,
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const void* program_counter)
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: function_name_(function_name),
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file_name_(file_name),
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line_number_(line_number),
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program_counter_(program_counter) {
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#if !defined(OS_NACL)
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// The program counter should not be null except in a default constructed
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// (empty) Location object. This value is used for identity, so if it doesn't
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// uniquely identify a location, things will break.
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//
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// The program counter isn't supported in NaCl so location objects won't work
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// properly in that context.
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DCHECK(program_counter);
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#endif
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}
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std::string Location::ToString() const {
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if (has_source_info()) {
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return std::string(function_name_) + "@" + file_name_ + ":" +
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NumberToString(line_number_);
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}
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return StringPrintf("pc:%p", program_counter_);
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}
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#if defined(COMPILER_MSVC)
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#define RETURN_ADDRESS() _ReturnAddress()
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#elif defined(COMPILER_GCC) && !defined(OS_NACL)
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#define RETURN_ADDRESS() \
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__builtin_extract_return_addr(__builtin_return_address(0))
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#else
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#define RETURN_ADDRESS() nullptr
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#endif
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#if !BUILDFLAG(FROM_HERE_USES_LOCATION_BUILTINS)
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#if !BUILDFLAG(ENABLE_LOCATION_SOURCE)
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// static
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NOINLINE Location Location::CreateFromHere(const char* file_name) {
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return Location(file_name, RETURN_ADDRESS());
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}
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#else
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// static
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NOINLINE Location Location::CreateFromHere(const char* function_name,
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const char* file_name,
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int line_number) {
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return Location(function_name, file_name, line_number, RETURN_ADDRESS());
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}
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#endif
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#endif
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#if SUPPORTS_LOCATION_BUILTINS && BUILDFLAG(ENABLE_LOCATION_SOURCE)
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// static
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NOINLINE Location Location::Current(const char* function_name,
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const char* file_name,
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int line_number) {
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return Location(function_name, file_name, line_number, RETURN_ADDRESS());
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}
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#elif SUPPORTS_LOCATION_BUILTINS
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// static
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NOINLINE Location Location::Current(const char* file_name) {
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return Location(file_name, RETURN_ADDRESS());
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}
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#else
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// static
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NOINLINE Location Location::Current() {
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return Location(nullptr, RETURN_ADDRESS());
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}
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#endif
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//------------------------------------------------------------------------------
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NOINLINE const void* GetProgramCounter() {
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return RETURN_ADDRESS();
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}
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} // namespace base
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