Commit Graph

5 Commits

Author SHA1 Message Date
Corinna Vinschen 5b972d5b29 gmon.h: Fix type of gmonparam state member
gmonparam::state is used in calls to Win32 Interlocked functions.
Having this defined as int breaks the build on i686.  Redefine as
LONG (same size and correct type on all platforms) to make gcc happy.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2016-03-11 22:50:24 +01:00
Mark Geisert 5807ba83e4 Support profiling of multi-threaded apps.
This patch set modifies Cygwin's profiling support to sample PC values
of all an app's threads, not just the main thread. There is no change
to how profiling is requested: just compile and link the app with "-pg"
as usual. The profiling info is dumped into file gmon.out as always.

A new facility enabled via the environment variable GMON_OUT_PREFIX.
This facility is intended to match an undocumented Linux glibc feature.
Exporting the variable with a non-empty value such as "foo" causes the
profiling info to go to a file named foo.$pid instead of the default.
With that, both resulting processes of a fork() can have their profiling
data captured in separate files. gprof already knows how to accumulate
data from multiple files if they all pertain to the same app.

There is no change to the normal Cygwin execution paths if profiling is
not enabled. And when it is enabled, only the one profiling thread per
profiled app is doing more work than it used to.

	* include/sys/cygwin.h: Add CW_CYGHEAP_PROFTHR_ALL.
	* cygheap.cc (cygheap_profthr_all): New C-callable function that
	runs cygheap's threadlist handing each pthread's thread handle in
	turn to profthr_byhandle().
	* external.cc (cygwin_internal): Add case CW_CYGHEAP_PROFTHR_ALL.
	* gmon.c (_mcleanup): Add support for multiple simultaneous
	gmon.out* files named via environment variable GMON_OUT_PREFIX.
	* gmon.h (struct gmonparam): Make state decl volatile.
	* mcount.c (_MCOUNT_DECL): Change stores into gmonparam.state to use
	Interlocked operations. Add #include "winsup.h", update commentary.
	* profil.c (profthr_byhandle): New function abstracting out the
	updating of profile counters based on a thread handle.
	(profthr_func): Update to call profthr_byhandle() to sample the main
	thread then call cygheap_profthr_all() indirectly through
	cygwin_internal(CW_CYGHEAP_PROFTHR_ALL) to sample all other threads.
	(profile_off): Zero targthr to indicate profiling was turned off.
	(profile_on): Fix handle leak on failure path.
	(profile_child): New callback func to restart profiling in child
	process after a fork if the parent was being profiled.
	(profile_ctl): Call pthread_atfork() to set profile_child callback.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
2016-03-10 20:39:46 +01:00
Corinna Vinschen ece6c8e383 * gmon.h: Pull in profile.h. Explain why. 2014-05-22 10:25:45 +00:00
Corinna Vinschen 943072f45c * Makefile.in (VPATH): Drop CONFIG_DIR.
(EXTRA_DLL_OFILES): Remove.
	(DLL_OFILES): Remove EXTRA_DLL_OFILES.
	(ASFLAGS): Define as -D_WIN64 on x86_64.
	(GMON_OFILES): Add mcountFunc.o.
	($(srcdir)/$(TLSOFFSETS_H)): Use target_cpu rather than CONFIG_DIR.
	* configure.ac (CONFIG_DIR): Remove definition.
	* configure: Regenerate.
	* gcrt0.c: Use latest version from Mingw-w64 project.
	* gmon.c: Ditto.
	* gmon.h: Ditto.
	* mcount.c: Ditto.
	* mcountFunc.S: Ditto, new file.
	* profil.c: Ditto.
	* profil.h: Ditto.
	* config: Remove entire directory.
2013-06-18 09:45:37 +00:00
Christopher Faylor 1fd5e000ac import winsup-2000-02-17 snapshot 2000-02-17 19:38:33 +00:00