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>
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 and
211 --use-symbol-table is on.
212 • Prints an address's debug-data discriminator when it is
214 non-zero. One way to produce discriminators is to compile with
215 clang's -fdebug-info-for-profiling.
216 $ llvm-symbolizer --obj=inlined.elf 0x4004be 0x400486 -p
218 baz() at /tmp/test.cpp:11:18
219 (inlined by) main at /tmp/test.cpp:15:0
220 foo() at /tmp/test.cpp:6:3
222 $ llvm-symbolizer --output-style=LLVM --obj=inlined.elf 0x4004be 0x400486 -p --no-inlines
224 main at /tmp/test.cpp:11:18
225 foo() at /tmp/test.cpp:6:3
227 $ llvm-symbolizer --output-style=GNU --obj=inlined.elf 0x4004be 0x400486 -p --no-inlines
229 baz() at /tmp/test.cpp:11
230 foo() at /tmp/test.cpp:6
231 $ clang -g -fdebug-info-for-profiling test.cpp -o profiling.elf
233 $ llvm-symbolizer --output-style=GNU --obj=profiling.elf 0x401167 -p --no-inlines
234 main at /tmp/test.cpp:15 (discriminator 2)
235 --pretty-print, -p
237 Print human readable output. If --inlining is specified, the en‐
238 closing scope is prefixed by (inlined by).
239 $ llvm-symbolizer --obj=inlined.elf 0x4004be --inlining --pretty-print
241 baz() at /tmp/test.cpp:11:18
242 (inlined by) main at /tmp/test.cpp:15:0
243 --print-address, --addresses, -a
245 Print address before the source code location. Defaults to
246 false.
247 $ llvm-symbolizer --obj=inlined.elf --print-address 0x4004be
249 0x4004be
250 baz()
251 /tmp/test.cpp:11:18
252 main
253 /tmp/test.cpp:15:0
254 $ llvm-symbolizer --obj=inlined.elf 0x4004be --pretty-print --print-address
256 0x4004be: baz() at /tmp/test.cpp:11:18
257 (inlined by) main at /tmp/test.cpp:15:0
258 --print-source-context-lines <N>
260 Print N lines of source context for each symbolized address.
261 $ llvm-symbolizer --obj=test.elf 0x400490 --print-source-context-lines=2
263 baz()
264 /tmp/test.cpp:11:0
265 10 : volatile int k = 42;
266 11 >: return foz() + k;
267 12 : }
268 --relativenames
270 Print the file's path relative to the compilation directory, in‐
271 stead of the absolute path. If the command-line to the compiler
272 included the full path, this will be the same as the default.
273 --use-symbol-table
275 Prefer function names stored in symbol table to function names
276 in debug info sections. Defaults to true.
277 --verbose
279 Print verbose line and column information.
280 $ llvm-symbolizer --obj=inlined.elf --verbose 0x4004be
282 baz()
283 Filename: /tmp/test.cpp
284 Function start line: 9
285 Line: 11
286 Column: 18
287 main
288 Filename: /tmp/test.cpp
289 Function start line: 14
290 Line: 15
291 Column: 0
292 --version, -v
294 Print version information for the tool.
295 @<FILE>
297 Read command-line options from response file <FILE>.
298
300 --dia Use the Windows DIA SDK for symbolization. If the DIA SDK is not
301 found, llvm-symbolizer will fall back to the native implementa‐
302 tion.
303
305 --default-arch <arch>
306 If a binary contains object files for multiple architectures
307 (e.g. it is a Mach-O universal binary), symbolize the object
308 file for a given architecture. You can also specify the archi‐
309 tecture by writing binary_name:arch_name in the input (see exam‐
310 ple below). If the architecture is not specified in either way,
311 the address will not be symbolized. Defaults to empty string.
312 $ cat addr.txt
314 /tmp/mach_universal_binary:i386 0x1f84
315 /tmp/mach_universal_binary:x86_64 0x100000f24
316 $ llvm-symbolizer < addr.txt
318 _main
319 /tmp/source_i386.cc:8
320 _main
322 /tmp/source_x86_64.cc:8
323 --dsym-hint <path/to/file.dSYM>
325 If the debug info for a binary isn't present in the default lo‐
326 cation, look for the debug info at the .dSYM path provided via
327 this option. This flag can be used multiple times.
328
330 llvm-symbolizer returns 0. Other exit codes imply an internal program
331 error.
332
334 llvm-addr2line(1)
335
337 Maintained by the LLVM Team (https://llvm.org/).
338
340 2003-2021, LLVM Project
34112 2021-05-17 LLVM-SYMBOLIZER(1)