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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "build/build_config.h"
#if defined(COMPILER_MSVC)
// MSDN says to #include <intrin.h>, but that breaks the VS2005 build.
extern "C" {
void* _ReturnAddress();
}
#endif
#include "base/location.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
namespace tracked_objects {
Location::Location(const char* function_name,
const char* file_name,
int line_number,
const void* program_counter)
: function_name_(function_name),
file_name_(file_name),
line_number_(line_number),
program_counter_(program_counter) {
}
Location::Location()
: function_name_("Unknown"),
file_name_("Unknown"),
line_number_(-1),
program_counter_(NULL) {
}
std::string Location::ToString() const {
return std::string(function_name_) + "@" + file_name_ + ":" +
base::IntToString(line_number_);
}
void Location::Write(bool display_filename, bool display_function_name,
std::string* output) const {
base::StringAppendF(output, "%s[%d] ",
display_filename ? file_name_ : "line",
line_number_);
if (display_function_name) {
WriteFunctionName(output);
output->push_back(' ');
}
}
void Location::WriteFunctionName(std::string* output) const {
// Translate "<" to "<" for HTML safety.
// TODO(jar): Support ASCII or html for logging in ASCII.
for (const char *p = function_name_; *p; p++) {
switch (*p) {
case '<':
output->append("<");
break;
case '>':
output->append(">");
break;
default:
output->push_back(*p);
break;
}
}
}
//------------------------------------------------------------------------------
LocationSnapshot::LocationSnapshot() : line_number(-1) {
}
LocationSnapshot::LocationSnapshot(
const tracked_objects::Location& location)
: file_name(location.file_name()),
function_name(location.function_name()),
line_number(location.line_number()) {
}
LocationSnapshot::~LocationSnapshot() {
}
//------------------------------------------------------------------------------
#if defined(COMPILER_MSVC)
__declspec(noinline)
#endif
BASE_EXPORT const void* GetProgramCounter() {
#if defined(COMPILER_MSVC)
return _ReturnAddress();
#elif defined(COMPILER_GCC)
return __builtin_extract_return_addr(__builtin_return_address(0));
#endif // COMPILER_GCC
return NULL;
}
} // namespace tracked_objects
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