NAME

lmdbg-grep - output stacktraces that match the specified condition

SYNOPSIS

lmdbg-grep [OPTIONS] <awk_expr> [files...]

DESCRIPTION

lmdbg-grep takes output of lmdbg-stat or lmdbg-run as input and outputs stacktraces that match the condition awk_expr. The following special variables can be used in awk_exp expression :

bytes: the number of allocated bytes,
allocs: the number of calls of malloc, calloc, memalign, posix_memalign and aligned_alloc functions,
max: the maximum number of bytes allocated per malloc, calloc, memalign, posix_memalign and aligned_alloc functions,
peak: the peak number of allocated bytes,
leaks: the number of allocated but not freed bytes,
address: address returned by memory allocation function,
source: source code filename,
funcname: function name,
addrline: address in the stacktrace.

The following variables are numeric: bytes, allocs, max, peak, leaks; others contain string values.

OPTIONS

-h: Display the help message.
-V: Display the lmdbg version.
-v: Invert the sense of matching, select non-matching lines.

EXAMPLE

$ cat log
stacktrace peak: 120 max: 70 allocs: 3 leaks: 50


 0xbbbe2bc3     lmdbg.c:101     log_stacktrace


 0xbbbe3498     lmdbg.c:456     realloc


 0x8049700      testme.c:902    func1


 0x8048788      testme.c:9      main


 0x80485b4      


 0x8048517      
stacktrace peak: 100 max: 100 allocs: 1


 0xbbbe2bc3     lmdbg.c:101     log_stacktrace


 0xbbbe33bd     lmdbg.c:431     malloc


 0x8049654      testme.c:450    func2


 0x8048757      testme.c:7      main


 0x80485b4      


 0x8048517      
$ lmdbg-grep 'leaks > 0' log 
stacktrace peak: 120 max: 70 allocs: 3 leaks: 50


 0xbbbe2bc3     lmdbg.c:101     log_stacktrace


 0xbbbe3498     lmdbg.c:456     realloc


 0x8049700      testme.c:902    func1


 0x8048788      testme.c:9      main


 0x80485b4      


 0x8048517      
$ lmdbg-grep '!leaks' log    
stacktrace peak: 100 max: 100 allocs: 1


 0xbbbe2bc3     lmdbg.c:101     log_stacktrace


 0xbbbe33bd     lmdbg.c:431     malloc


 0x8049654      testme.c:450    func2


 0x8048757      testme.c:7      main


 0x80485b4      


 0x8048517      
$ lmdbg-grep 'addrline ~ /func2/' log  
stacktrace peak: 100 max: 100 allocs: 1


 0xbbbe2bc3     lmdbg.c:101     log_stacktrace


 0xbbbe33bd     lmdbg.c:431     malloc


 0x8049654      testme.c:450    func2


 0x8048757      testme.c:7      main


 0x80485b4      


 0x8048517      
$ lmdbg-grep 'allocs > 1000 || peak > 1000000' log   
$

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