LMDBG for Linux 0.17.0

LMDBG is an application that allows detecting memory leaksand double frees. However, unlike others, LMDBG generates *FULL* stacktracesand separates logging from analysis thusallowing to analyse an application on per-module basis.<br /><br />- lmdbg-run is a main lmdbg utility. It runs an application and creates a log file (or fifo) where all called malloc/calloc/realloc/free/memalign/posix_memalign invocations are registered with their input (bytes count, pointer), output (pointer) and (!!!uniques feature!!!) FULL STACKTRACE (pointers).<br /><br />Example:<br /><br /> $ cat tests/test2.c<br /> #include<br /><br /> int main ()<br /> {<br /> void *p1 = NULL;<br /> void *p2 = NULL;<br /><br /> p1 = malloc (555);<br /> p2 = realloc (p2, 666);<br /> p2 = realloc (p2, 777);<br /> p2 = realloc (p2, 888);<br /><br /> return 0;<br /> }<br /> $ gcc -O0 -g -o _test2 tests/test2.c<br /> $ lmdbg-run -o _log ./_test2<br /> $ cat _log<br /> malloc ( 555 ) --> 0xbb901400<br /> 0xbbbe58e8<br /> 0xbbbe5b03<br /> 0x8048738<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( NULL , 666 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804874e<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901800 , 777 ) --> 0xbb901c00<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x8048764<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901c00 , 888 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804877a<br /> 0x8048584<br /> 0x80484e7<br /> $<br /><br />NOTE: Full stacktrace allows you to analyse your application, i.e. you can detect what blocks/components require more memory than others and why. lmdbg-sym is a very important tool for this, see below.<br /><br />- lmdbg-leaks analyses a log file generated by lmdbg-run and output all found memory leaks<br /><br />Example:<br /><br /> $ lmdbg-leaks _log <br /> realloc ( 0xbb901c00 , 888 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804877a<br /> 0x8048584<br /> 0x80484e7<br /> malloc ( 555 ) --> 0xbb901400<br /> 0xbbbe58e8<br /> 0xbbbe5b03<br /> 0x8048738<br /> 0x8048584<br /> 0x80484e7<br /> $<br /><br />- lmdbg-sym converts addresses to source.c:999 if it is possible<br /><br />Example (gdb(1) is in action):<br /><br /> $ lmdbg-sym ./_test2 _log<br /> malloc ( 555 ) --> 0xbb901400<br /> 0xbbbe58e8<br /> 0xbbbe5b03<br /> 0x8048738 tests/test2.c:8 main<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( NULL , 666 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804874e tests/test2.c:9 main<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901800 , 777 ) --> 0xbb901c00<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x8048764 tests/test2.c:10 main<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901c00 , 888 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804877a tests/test2.c:11 main<br /> 0x8048584<br /> 0x80484e7<br /> $<br /><br />Example (addr2line(1) works here):<br /><br /> $ lmdbg-sym -a ./_test2 _log<br /> malloc ( 555 ) --> 0xbb901400<br /> 0xbbbe58e8<br /> 0xbbbe5b03<br /> 0x8048738 tests/test2.c:8<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( NULL , 666 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804874e tests/test2.c:9<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901800 , 777 ) --> 0xbb901c00<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x8048764 tests/test2.c:10<br /> 0x8048584<br /> 0x80484e7<br /> realloc ( 0xbb901c00 , 888 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804877a tests/test2.c:11<br /> 0x8048584<br /> 0x80484e7<br /> $<br /><br />- lmdbg-sysleaks - greps or skips system memory leaks found in libc, libdl, C++ stl etc. See tests/lmdbg*.conf files. The default config files are: ~/.lmdbg.conf and /etc/lmdbg.conf<br /><br />- lmdbg = lmdbg-run + lmdbg-leaks + lmdbg-sym + lmdbg-sysleaks<br /><br />That is lmdbg is all-in-one higher level tool.<br /><br />Example:<br /><br /> $ lmdbg -v -o _log ./_test2<br /> Memory leaks were detected and saved to file '_log'<br /> $ cat _log<br /> realloc ( 0xbb901c00 , 888 ) --> 0xbb901800<br /> 0xbbbe58e8<br /> 0xbbbe5a37<br /> 0x804877a tests/test2.c:11 main<br /> 0x8048584<br /> 0x80484e7<br /> malloc ( 555 ) --> 0xbb901400<br /> 0xbbbe58e8<br /> 0xbbbe5b03<br /> 0x8048738 tests/test2.c:8 main<br /> 0x8048584<br /> 0x80484e7<br /> $

Requirements:	No special requirements
Platforms:	*nix, Linux
Keyword:	0x80484e7,  0x8048584,  0x8048738,  0x804877a,  Application,  Lmdbg,  Lmdbgrun,  Lmdbgsym,  Malloc,  Memory,  Realloc,  Test,  Teststest,  Xbb,  Xbbbe
Users rating:	0/10