1LLVM-SYMBOLIZER(1) LLVM LLVM-SYMBOLIZER(1)
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6 llvm-symbolizer - convert addresses into source code locations
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9 llvm-symbolizer [options] [addresses...]
10
12 llvm-symbolizer reads object file names and addresses from the com‐
13 mand-line and prints corresponding source code locations to standard
14 output.
15 If no address is specified on the command-line, it reads the addresses
17 from standard input. If no object file is specified on the com‐
18 mand-line, but addresses are, or if at any time an input value is not
19 recognized, the input is simply echoed to the output.
20 A positional argument or standard input value can be preceded by "DATA"
22 or "CODE" to indicate that the address should be symbolized as data or
23 executable code respectively. If neither is specified, "CODE" is as‐
24 sumed. DATA is symbolized as address and symbol size rather than line
25 number.
26 Object files can be specified together with the addresses either on
28 standard input or as positional arguments on the command-line, follow‐
29 ing any "DATA" or "CODE" prefix.
30 llvm-symbolizer parses options from the environment variable LLVM_SYM‐
32 BOLIZER_OPTS after parsing options from the command line. LLVM_SYMBOL‐
33 IZER_OPTS is primarily useful for supplementing the command-line op‐
34 tions when llvm-symbolizer is invoked by another program or runtime.
35
37 All of the following examples use the following two source files as in‐
38 put. They use a mixture of C-style and C++-style linkage to illustrate
39 how these names are printed differently (see --demangle).
40 // test.h
42 extern "C" inline int foz() {
43 return 1234;
44 }
45 // test.cpp
47 #include "test.h"
48 int bar=42;
49 int foo() {
51 return bar;
52 }
53 int baz() {
55 volatile int k = 42;
56 return foz() + k;
57 }
58 int main() {
60 return foo() + baz();
61 }
62 These files are built as follows:
64 $ clang -g test.cpp -o test.elf
66 $ clang -g -O2 test.cpp -o inlined.elf
67 Example 1 - addresses and object on command-line:
69 $ llvm-symbolizer --obj=test.elf 0x4004d0 0x400490
71 foz
72 /tmp/test.h:1:0
73 baz()
75 /tmp/test.cpp:11:0
76 Example 2 - addresses on standard input:
78 $ cat addr.txt
80 0x4004a0
81 0x400490
82 0x4004d0
83 $ llvm-symbolizer --obj=test.elf < addr.txt
84 main
85 /tmp/test.cpp:15:0
86 baz()
88 /tmp/test.cpp:11:0
89 foz
91 /tmp/./test.h:1:0
92 Example 3 - object specified with address:
94 $ llvm-symbolizer "test.elf 0x400490" "inlined.elf 0x400480"
96 baz()
97 /tmp/test.cpp:11:0
98 foo()
100 /tmp/test.cpp:8:10
101 $ cat addr2.txt
103 test.elf 0x4004a0
104 inlined.elf 0x400480
105 $ llvm-symbolizer < addr2.txt
107 main
108 /tmp/test.cpp:15:0
109 foo()
111 /tmp/test.cpp:8:10
112 Example 4 - CODE and DATA prefixes:
114 $ llvm-symbolizer --obj=test.elf "CODE 0x400490" "DATA 0x601028"
116 baz()
117 /tmp/test.cpp:11:0
118 bar
120 6295592 4
121 $ cat addr3.txt
123 CODE test.elf 0x4004a0
124 DATA inlined.elf 0x601028
125 $ llvm-symbolizer < addr3.txt
127 main
128 /tmp/test.cpp:15:0
129 bar
131 6295592 4
132 Example 5 - path-style options:
134 This example uses the same source file as above, but the source file's
136 full path is /tmp/foo/test.cpp and is compiled as follows. The first
137 case shows the default absolute path, the second --basenames, and the
138 third shows --relativenames.
139 $ pwd
141 /tmp
142 $ clang -g foo/test.cpp -o test.elf
143 $ llvm-symbolizer --obj=test.elf 0x4004a0
144 main
145 /tmp/foo/test.cpp:15:0
146 $ llvm-symbolizer --obj=test.elf 0x4004a0 --basenames
147 main
148 test.cpp:15:0
149 $ llvm-symbolizer --obj=test.elf 0x4004a0 --relativenames
150 main
151 foo/test.cpp:15:0
152
154 --adjust-vma <offset>
155 Add the specified offset to object file addresses when perform‐
156 ing lookups. This can be used to perform lookups as if the ob‐
157 ject were relocated by the offset.
158 --basenames, -s
160 Print just the file's name without any directories, instead of
161 the absolute path.
162 --relativenames
164 Print the file's path relative to the compilation directory, in‐
165 stead of the absolute path. If the command-line to the compiler
166 included the full path, this will be the same as the default.
167 --demangle, -C
169 Print demangled function names, if the names are mangled (e.g.
170 the mangled name _Z3bazv becomes baz(), whilst the non-mangled
171 name foz is printed as is). Defaults to true.
172 --dwp <path>
174 Use the specified DWP file at <path> for any CUs that have split
175 DWARF debug data.
176 --fallback-debug-path <path>
178 When a separate file contains debug data, and is referenced by a
179 GNU debug link section, use the specified path as a basis for
180 locating the debug data if it cannot be found relative to the
181 object.
182 --functions [=<none|short|linkage>], -f
184 Specify the way function names are printed (omit function name,
185 print short function name, or print full linkage name, respec‐
186 tively). Defaults to linkage.
187 --help, -h
189 Show help and usage for this command.
190 --help-list
192 Show help and usage for this command without grouping the op‐
193 tions into categories.
194 --inlining, --inlines, -i
196 If a source code location is in an inlined function, prints all
197 the inlined frames. Defaults to true.
198 --no-demangle
200 Don't print demangled function names.
201 --obj <path>, --exe, -e
203 Path to object file to be symbolized. If - is specified, read
204 the object directly from the standard input stream.
205 --output-style <LLVM|GNU>
207 Specify the preferred output style. Defaults to LLVM. When the
208 output style is set to GNU, the tool follows the style of GNU's
209 addr2line. The differences from the LLVM style are:
210 • Does not print the column of a source code location.
212 • Does not add an empty line after the report for an address.
214 • Does not replace the name of an inlined function with the name
216 of the topmost caller when inlined frames are not shown and
217 --use-symbol-table is on.
218 • Prints an address's debug-data discriminator when it is
220 non-zero. One way to produce discriminators is to compile with
221 clang's -fdebug-info-for-profiling.
222 $ llvm-symbolizer --obj=inlined.elf 0x4004be 0x400486 -p
224 baz() at /tmp/test.cpp:11:18
225 (inlined by) main at /tmp/test.cpp:15:0
226 foo() at /tmp/test.cpp:6:3
228 $ llvm-symbolizer --output-style=LLVM --obj=inlined.elf 0x4004be 0x400486 -p -i=0
230 main at /tmp/test.cpp:11:18
231 foo() at /tmp/test.cpp:6:3
233 $ llvm-symbolizer --output-style=GNU --obj=inlined.elf 0x4004be 0x400486 -p -i=0
235 baz() at /tmp/test.cpp:11
236 foo() at /tmp/test.cpp:6
237 $ clang -g -fdebug-info-for-profiling test.cpp -o profiling.elf
239 $ llvm-symbolizer --output-style=GNU --obj=profiling.elf 0x401167 -p -i=0
240 main at /tmp/test.cpp:15 (discriminator 2)
241 --pretty-print, -p
243 Print human readable output. If --inlining is specified, the en‐
244 closing scope is prefixed by (inlined by).
245 $ llvm-symbolizer --obj=inlined.elf 0x4004be --inlining --pretty-print
247 baz() at /tmp/test.cpp:11:18
248 (inlined by) main at /tmp/test.cpp:15:0
249 --print-address, --addresses, -a
251 Print address before the source code location. Defaults to
252 false.
253 $ llvm-symbolizer --obj=inlined.elf --print-address 0x4004be
255 0x4004be
256 baz()
257 /tmp/test.cpp:11:18
258 main
259 /tmp/test.cpp:15:0
260 $ llvm-symbolizer --obj=inlined.elf 0x4004be --pretty-print --print-address
262 0x4004be: baz() at /tmp/test.cpp:11:18
263 (inlined by) main at /tmp/test.cpp:15:0
264 --print-source-context-lines <N>
266 Print N lines of source context for each symbolized address.
267 $ llvm-symbolizer --obj=test.elf 0x400490 --print-source-context-lines=2
269 baz()
270 /tmp/test.cpp:11:0
271 10 : volatile int k = 42;
272 11 >: return foz() + k;
273 12 : }
274 --use-symbol-table
276 Prefer function names stored in symbol table to function names
277 in debug info sections. Defaults to true.
278 --verbose
280 Print verbose line and column information.
281 $ llvm-symbolizer --obj=inlined.elf --verbose 0x4004be
283 baz()
284 Filename: /tmp/test.cpp
285 Function start line: 9
286 Line: 11
287 Column: 18
288 main
289 Filename: /tmp/test.cpp
290 Function start line: 14
291 Line: 15
292 Column: 0
293 --version
295 Print version information for the tool.
296 @<FILE>
298 Read command-line options from response file <FILE>.
299
301 --default-arch <arch>
302 If a binary contains object files for multiple architectures
303 (e.g. it is a Mach-O universal binary), symbolize the object
304 file for a given architecture. You can also specify the archi‐
305 tecture by writing binary_name:arch_name in the input (see exam‐
306 ple below). If the architecture is not specified in either way,
307 the address will not be symbolized. Defaults to empty string.
308 $ cat addr.txt
310 /tmp/mach_universal_binary:i386 0x1f84
311 /tmp/mach_universal_binary:x86_64 0x100000f24
312 $ llvm-symbolizer < addr.txt
314 _main
315 /tmp/source_i386.cc:8
316 _main
318 /tmp/source_x86_64.cc:8
319 --dsym-hint <path/to/file.dSYM>
321 If the debug info for a binary isn't present in the default lo‐
322 cation, look for the debug info at the .dSYM path provided via
323 this option. This flag can be used multiple times.
324
326 llvm-symbolizer returns 0. Other exit codes imply an internal program
327 error.
328
330 llvm-addr2line(1)
331
333 Maintained by the LLVM Team (https://llvm.org/).
334
336 2003-2021, LLVM Project
33711 2021-03-23 LLVM-SYMBOLIZER(1)