1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "build/build_config.h"
6
7 #if defined(COMPILER_MSVC)
8 #include <intrin.h>
9 #endif
10
11 #include "base/location.h"
12 #include "base/strings/string_number_conversions.h"
13 #include "base/strings/stringprintf.h"
14
15 namespace tracked_objects {
16
Location(const char * function_name,const char * file_name,int line_number,const void * program_counter)17 Location::Location(const char* function_name,
18 const char* file_name,
19 int line_number,
20 const void* program_counter)
21 : function_name_(function_name),
22 file_name_(file_name),
23 line_number_(line_number),
24 program_counter_(program_counter) {
25 }
26
Location()27 Location::Location()
28 : function_name_("Unknown"),
29 file_name_("Unknown"),
30 line_number_(-1),
31 program_counter_(NULL) {
32 }
33
Location(const Location & other)34 Location::Location(const Location& other)
35 : function_name_(other.function_name_),
36 file_name_(other.file_name_),
37 line_number_(other.line_number_),
38 program_counter_(other.program_counter_) {
39 }
40
ToString() const41 std::string Location::ToString() const {
42 return std::string(function_name_) + "@" + file_name_ + ":" +
43 base::IntToString(line_number_);
44 }
45
Write(bool display_filename,bool display_function_name,std::string * output) const46 void Location::Write(bool display_filename, bool display_function_name,
47 std::string* output) const {
48 base::StringAppendF(output, "%s[%d] ",
49 display_filename ? file_name_ : "line",
50 line_number_);
51
52 if (display_function_name) {
53 WriteFunctionName(output);
54 output->push_back(' ');
55 }
56 }
57
WriteFunctionName(std::string * output) const58 void Location::WriteFunctionName(std::string* output) const {
59 // Translate "<" to "<" for HTML safety.
60 // TODO(jar): Support ASCII or html for logging in ASCII.
61 for (const char *p = function_name_; *p; p++) {
62 switch (*p) {
63 case '<':
64 output->append("<");
65 break;
66
67 case '>':
68 output->append(">");
69 break;
70
71 default:
72 output->push_back(*p);
73 break;
74 }
75 }
76 }
77
78 //------------------------------------------------------------------------------
LocationSnapshot()79 LocationSnapshot::LocationSnapshot() : line_number(-1) {
80 }
81
LocationSnapshot(const tracked_objects::Location & location)82 LocationSnapshot::LocationSnapshot(
83 const tracked_objects::Location& location)
84 : file_name(location.file_name()),
85 function_name(location.function_name()),
86 line_number(location.line_number()) {
87 }
88
~LocationSnapshot()89 LocationSnapshot::~LocationSnapshot() {
90 }
91
92 //------------------------------------------------------------------------------
93 #if defined(COMPILER_MSVC)
94 __declspec(noinline)
95 #endif
GetProgramCounter()96 BASE_EXPORT const void* GetProgramCounter() {
97 #if defined(COMPILER_MSVC)
98 return _ReturnAddress();
99 #elif defined(COMPILER_GCC) && !defined(OS_NACL)
100 return __builtin_extract_return_addr(__builtin_return_address(0));
101 #else
102 return NULL;
103 #endif
104 }
105
106 } // namespace tracked_objects
107