valgrind 命令

常用示例

说明

valgrind is an instrumentation framework for dynamic analysis tools. The default tool, memcheck, detects memory management problems: leaks, use of uninitialized memory, buffer overflows, and invalid frees. Programs run significantly slower under Valgrind (10-50x) as every memory access is instrumented. This is normal and expected. Output indicates error type, location (with line numbers if compiled with -g), and call stack. "Definitely lost" memory is a real leak; "still reachable" may be acceptable cleanup deferred to exit. Other tools profile performance (cachegrind, callgrind), detect threading issues (helgrind, drd), or analyze heap usage (massif).

参数

--tool=_name_

Select tool (memcheck, cachegrind, callgrind, helgrind, drd, massif)

--leak-check=_level_

Check for memory leaks (no, summary, full)

--show-leak-kinds=_kinds_

Which leaks to show (definite, indirect, possible, reachable, all)

--track-origins=_yes|no_

Track origins of uninitialized values

--log-file=_file_

Write output to file

--xml=_yes_

Output in XML format

--gen-suppressions=_level_

Generate suppression entries (no, yes, all)

--suppressions=_file_

Use suppressions from file

-v, --verbose

More verbose output

-q, --quiet

Less verbose output

--num-callers=_N_

Maximum stack depth for error reports (default: 12)

--vgdb=_yes|no|full_

Enable gdb server for debugging under Valgrind