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 --demangle, -C
164 Print demangled function names, if the names are mangled (e.g.
165 the mangled name _Z3bazv becomes baz(), whilst the non-mangled
166 name foz is printed as is). Defaults to true.
167 --dwp <path>
169 Use the specified DWP file at <path> for any CUs that have split
170 DWARF debug data.
171 --fallback-debug-path <path>
173 When a separate file contains debug data, and is referenced by a
174 GNU debug link section, use the specified path as a basis for
175 locating the debug data if it cannot be found relative to the
176 object.
177 --functions [=<none|short|linkage>], -f
179 Specify the way function names are printed (omit function name,
180 print short function name, or print full linkage name, respec‐
181 tively). Defaults to linkage.
182 --help, -h
184 Show help and usage for this command.
185 --inlining, --inlines, -i
187 If a source code location is in an inlined function, prints all
188 the inlined frames. This is the default.
189 --no-inlines
191 Don't print inlined frames.
192 --no-demangle
194 Don't print demangled function names.
195 --obj <path>, --exe, -e
197 Path to object file to be symbolized. If - is specified, read
198 the object directly from the standard input stream.
199 --output-style <LLVM|GNU|JSON>
201 Specify the preferred output style. Defaults to LLVM. When the
202 output style is set to GNU, the tool follows the style of GNU's
203 addr2line. The differences from the LLVM style are:
204 • Does not print the column of a source code location.
206 • Does not add an empty line after the report for an address.
208 • Does not replace the name of an inlined function with the name
210 of the topmost caller when inlined frames are not shown.
211 • Prints an address's debug-data discriminator when it is
213 non-zero. One way to produce discriminators is to compile with
214 clang's -fdebug-info-for-profiling.
215 JSON style provides a machine readable output in JSON. If ad‐
217 dresses are
218 supplied via stdin, the output JSON will be a series of
219 individual objects. Otherwise, all results will be con‐
220 tained in a single array.
221 $ llvm-symbolizer --obj=inlined.elf 0x4004be 0x400486 -p
223 baz() at /tmp/test.cpp:11:18
224 (inlined by) main at /tmp/test.cpp:15:0
225 foo() at /tmp/test.cpp:6:3
227 $ llvm-symbolizer --output-style=LLVM --obj=inlined.elf 0x4004be 0x400486 -p --no-inlines
229 main at /tmp/test.cpp:11:18
230 foo() at /tmp/test.cpp:6:3
232 $ llvm-symbolizer --output-style=GNU --obj=inlined.elf 0x4004be 0x400486 -p --no-inlines
234 baz() at /tmp/test.cpp:11
235 foo() at /tmp/test.cpp:6
236 $ clang -g -fdebug-info-for-profiling test.cpp -o profiling.elf
238 $ llvm-symbolizer --output-style=GNU --obj=profiling.elf 0x401167 -p --no-inlines
239 main at /tmp/test.cpp:15 (discriminator 2)
240 $ llvm-symbolizer --output-style=JSON --obj=inlined.elf 0x4004be 0x400486 -p
242 [
243 {
244 "Address": "0x4004be",
245 "ModuleName": "inlined.elf",
246 "Symbol": [
247 {
248 "Column": 18,
249 "Discriminator": 0,
250 "FileName": "/tmp/test.cpp",
251 "FunctionName": "baz()",
252 "Line": 11,
253 "Source": "",
254 "StartFileName": "/tmp/test.cpp",
255 "StartLine": 9
256 },
257 {
258 "Column": 0,
259 "Discriminator": 0,
260 "FileName": "/tmp/test.cpp",
261 "FunctionName": "main",
262 "Line": 15,
263 "Source": "",
264 "StartFileName": "/tmp/test.cpp",
265 "StartLine": 14
266 }
267 ]
268 },
269 {
270 "Address": "0x400486",
271 "ModuleName": "inlined.elf",
272 "Symbol": [
273 {
274 "Column": 3,
275 "Discriminator": 0,
276 "FileName": "/tmp/test.cpp",
277 "FunctionName": "foo()",
278 "Line": 6,
279 "Source": "",
280 "StartFileName": "/tmp/test.cpp",
281 "StartLine": 5
282 }
283 ]
284 }
285 ]
286 --pretty-print, -p
288 Print human readable output. If --inlining is specified, the en‐
289 closing scope is prefixed by (inlined by). For JSON output, the
290 option will cause JSON to be indented and split over new lines.
291 Otherwise, the JSON output will be printed in a compact form.
292 $ llvm-symbolizer --obj=inlined.elf 0x4004be --inlining --pretty-print
294 baz() at /tmp/test.cpp:11:18
295 (inlined by) main at /tmp/test.cpp:15:0
296 --print-address, --addresses, -a
298 Print address before the source code location. Defaults to
299 false.
300 $ llvm-symbolizer --obj=inlined.elf --print-address 0x4004be
302 0x4004be
303 baz()
304 /tmp/test.cpp:11:18
305 main
306 /tmp/test.cpp:15:0
307 $ llvm-symbolizer --obj=inlined.elf 0x4004be --pretty-print --print-address
309 0x4004be: baz() at /tmp/test.cpp:11:18
310 (inlined by) main at /tmp/test.cpp:15:0
311 --print-source-context-lines <N>
313 Print N lines of source context for each symbolized address.
314 $ llvm-symbolizer --obj=test.elf 0x400490 --print-source-context-lines=3
316 baz()
317 /tmp/test.cpp:11:0
318 10 : volatile int k = 42;
319 11 >: return foz() + k;
320 12 : }
321 --relativenames
323 Print the file's path relative to the compilation directory, in‐
324 stead of the absolute path. If the command-line to the compiler
325 included the full path, this will be the same as the default.
326 --verbose
328 Print verbose address, line and column information.
329 $ llvm-symbolizer --obj=inlined.elf --verbose 0x4004be
331 baz()
332 Filename: /tmp/test.cpp
333 Function start filename: /tmp/test.cpp
334 Function start line: 9
335 Function start address: 0x4004b6
336 Line: 11
337 Column: 18
338 main
339 Filename: /tmp/test.cpp
340 Function start filename: /tmp/test.cpp
341 Function start line: 14
342 Function start address: 0x4004b0
343 Line: 15
344 Column: 18
345 --version, -v
347 Print version information for the tool.
348 @<FILE>
350 Read command-line options from response file <FILE>.
351
353 --dia Use the Windows DIA SDK for symbolization. If the DIA SDK is not
354 found, llvm-symbolizer will fall back to the native implementa‐
355 tion.
356
358 --default-arch <arch>
359 If a binary contains object files for multiple architectures
360 (e.g. it is a Mach-O universal binary), symbolize the object
361 file for a given architecture. You can also specify the archi‐
362 tecture by writing binary_name:arch_name in the input (see exam‐
363 ple below). If the architecture is not specified in either way,
364 the address will not be symbolized. Defaults to empty string.
365 $ cat addr.txt
367 /tmp/mach_universal_binary:i386 0x1f84
368 /tmp/mach_universal_binary:x86_64 0x100000f24
369 $ llvm-symbolizer < addr.txt
371 _main
372 /tmp/source_i386.cc:8
373 _main
375 /tmp/source_x86_64.cc:8
376 --dsym-hint <path/to/file.dSYM>
378 If the debug info for a binary isn't present in the default lo‐
379 cation, look for the debug info at the .dSYM path provided via
380 this option. This flag can be used multiple times.
381
383 llvm-symbolizer returns 0. Other exit codes imply an internal program
384 error.
385
387 llvm-addr2line(1)
388
390 Maintained by the LLVM Team (https://llvm.org/).
391
393 2003-2023, LLVM Project
39413 2023-01-31 LLVM-SYMBOLIZER(1)