gecko-dev/tools/reorder/cygprof.c
2012-05-21 12:12:37 +01:00

28 lines
768 B
C

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
A stub library to LD_PRELOAD against an image that's been compiled
with -finstrument-functions. It dumps the address of the function
that's being entered upon function entry, and the address that's
being returned to on function exit. Addresses are dumped as binary
data to stdout.
*/
#include <unistd.h>
void
__cyg_profile_func_enter(void *this_fn, void *call_site)
{
write(STDOUT_FILENO, &this_fn, sizeof this_fn);
}
void
__cyg_profile_func_exit(void *this_fn, void *call_site)
{
write(STDOUT_FILENO, &call_site, sizeof call_site);
}