1 //===-- sanitizer_common.cc -----------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file is shared between sanitizers' run-time libraries.
11 //
12 //===----------------------------------------------------------------------===//
13 #include "sanitizer_stacktrace_printer.h"
14
15 namespace __sanitizer {
16
StripFunctionName(const char * function,const char * prefix)17 static const char *StripFunctionName(const char *function, const char *prefix) {
18 if (function == 0) return 0;
19 if (prefix == 0) return function;
20 uptr prefix_len = internal_strlen(prefix);
21 if (0 == internal_strncmp(function, prefix, prefix_len))
22 return function + prefix_len;
23 return function;
24 }
25
26 static const char kDefaultFormat[] = " #%n %p %F %L";
27
RenderFrame(InternalScopedString * buffer,const char * format,int frame_no,const AddressInfo & info,const char * strip_path_prefix,const char * strip_func_prefix)28 void RenderFrame(InternalScopedString *buffer, const char *format, int frame_no,
29 const AddressInfo &info, const char *strip_path_prefix,
30 const char *strip_func_prefix) {
31 if (0 == internal_strcmp(format, "DEFAULT"))
32 format = kDefaultFormat;
33 for (const char *p = format; *p != '\0'; p++) {
34 if (*p != '%') {
35 buffer->append("%c", *p);
36 continue;
37 }
38 p++;
39 switch (*p) {
40 case '%':
41 buffer->append("%%");
42 break;
43 // Frame number and all fields of AddressInfo structure.
44 case 'n':
45 buffer->append("%zu", frame_no);
46 break;
47 case 'p':
48 buffer->append("0x%zx", info.address);
49 break;
50 case 'm':
51 buffer->append("%s", StripPathPrefix(info.module, strip_path_prefix));
52 break;
53 case 'o':
54 buffer->append("0x%zx", info.module_offset);
55 break;
56 case 'f':
57 buffer->append("%s", StripFunctionName(info.function, strip_func_prefix));
58 break;
59 case 'q':
60 buffer->append("0x%zx", info.function_offset != AddressInfo::kUnknown
61 ? info.function_offset
62 : 0x0);
63 break;
64 case 's':
65 buffer->append("%s", StripPathPrefix(info.file, strip_path_prefix));
66 break;
67 case 'l':
68 buffer->append("%d", info.line);
69 break;
70 case 'c':
71 buffer->append("%d", info.column);
72 break;
73 // Smarter special cases.
74 case 'F':
75 // Function name and offset, if file is unknown.
76 if (info.function) {
77 buffer->append("in %s",
78 StripFunctionName(info.function, strip_func_prefix));
79 if (!info.file && info.function_offset != AddressInfo::kUnknown)
80 buffer->append("+0x%zx", info.function_offset);
81 }
82 break;
83 case 'S':
84 // File/line information.
85 RenderSourceLocation(buffer, info.file, info.line, info.column,
86 strip_path_prefix);
87 break;
88 case 'L':
89 // Source location, or module location.
90 if (info.file) {
91 RenderSourceLocation(buffer, info.file, info.line, info.column,
92 strip_path_prefix);
93 } else if (info.module) {
94 RenderModuleLocation(buffer, info.module, info.module_offset,
95 strip_path_prefix);
96 } else {
97 buffer->append("(<unknown module>)");
98 }
99 break;
100 case 'M':
101 // Module basename and offset, or PC.
102 if (info.module)
103 buffer->append("(%s+%p)", StripModuleName(info.module),
104 (void *)info.module_offset);
105 else
106 buffer->append("(%p)", (void *)info.address);
107 break;
108 default:
109 Report("Unsupported specifier in stack frame format: %c (0x%zx)!\n",
110 *p, *p);
111 Die();
112 }
113 }
114 }
115
RenderSourceLocation(InternalScopedString * buffer,const char * file,int line,int column,const char * strip_path_prefix)116 void RenderSourceLocation(InternalScopedString *buffer, const char *file,
117 int line, int column, const char *strip_path_prefix) {
118 buffer->append("%s", StripPathPrefix(file, strip_path_prefix));
119 if (line > 0) {
120 buffer->append(":%d", line);
121 if (column > 0)
122 buffer->append(":%d", column);
123 }
124 }
125
RenderModuleLocation(InternalScopedString * buffer,const char * module,uptr offset,const char * strip_path_prefix)126 void RenderModuleLocation(InternalScopedString *buffer, const char *module,
127 uptr offset, const char *strip_path_prefix) {
128 buffer->append("(%s+0x%zx)", StripPathPrefix(module, strip_path_prefix),
129 offset);
130 }
131
132 } // namespace __sanitizer
133