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-rw-r--r--src/trace_profile/ltrace.md7
1 files changed, 7 insertions, 0 deletions
diff --git a/src/trace_profile/ltrace.md b/src/trace_profile/ltrace.md
index 12bd4b3..2881c07 100644
--- a/src/trace_profile/ltrace.md
+++ b/src/trace_profile/ltrace.md
@@ -7,8 +7,10 @@ ltrace [opts] [prg]
-o <file> ... log output into <file>
-l <filter> . show who calls into lib matched by <filter>
-C .......... demangle
+ -e <filter> . show calls symbols matched by <filter>
-x <filter> . which symbol table entry points to trace
(can be of form sym_pattern@lib_pattern)
+ -n <num> number of spaces to indent nested calls
```
# Example
@@ -18,6 +20,11 @@ List which program/libs call into `libstdc++`:
ltrace -l '*libstdc++*' -C -o ltrace.log ./main
```
+List calls to specific symbols:
+```bash
+ltrace -e malloc -e free ./main
+```
+
Trace symbols from `dlopen(3)`ed libraries.
```bash
# Assume libfoo.so would be dynamically loaded via dlopen.