Libmtrace is an experimantal project to trace all memory allocation, reallocations and deallocations of a linux applications that uses libc. A backtrace is provided for every memory allocation (exception for initial bootstrap). Most calls at the very beginning and end are typically underlying libc allocation and can be ignored. Thread ID is also shown.
Requires GCC:
makeTo see expressive backtrace symbols the application to be inspected should be compiled using -rdynamic, for example:
g++ test.cpp -o test -lpthread -rdynamicThis can then inspected as:
MTRACE_OUT=/dev/stdout LD_PRELOAD=./libmtrace.so ./test
LD_PRELOAD=./libmtrace.so /bin/pwdIf MTRACE_OUT is not specified the trace output will go to stderr.
Very little testing currently done.
Initial idea taken from: https://stackoverflow.com/questions/6083337/overriding-malloc-using-the-ld-preload-mechanism