9 Commits (2e1ad8fd8acc21ffef6f63fe852718e925e1ae3c)

Author	SHA1	Message	Date
Joe Groff	6d922c70a9	get sampler working under windows	2011-11-02 13:23:12 -07:00
Joe Groff	c0e4458733	vm: fix build on windows	2011-11-02 13:23:12 -07:00
Joe Groff	bec71e9ae2	vm: sampling profiler timer for windows ... Spawn a thread and have it spin on the performance counter, triggering safepoints on the main thread every sample time	2011-11-02 13:23:11 -07:00
Joe Groff	1c68bbf8a6	vm: count samples from foreign threads ... On OS X it appears the mach exception thread and libdispatch queue threads occasionally get the SIGALRM from the itimer. Count those as foreign_thread_samples instead of letting the signal kill the process.	2011-11-02 13:23:10 -07:00
Joe Groff	1ab4871fcc	vm: add primitives to lift sample data to factor	2011-11-02 13:23:09 -07:00
Joe Groff	cb2e87ecde	vm: release memory used by sampler vectors	2011-11-02 13:23:08 -07:00
Joe Groff	29e652f67e	vm: bottom_frame method for contexts ... ctx->callstack_bottom - 1 -- the fuck does that mean?!	2011-11-02 13:23:07 -07:00
Joe Groff	1604c503ab	vm: don't allocate callstack samples on data heap ... Invoking a GC during a safepoint has some complications, so stuff the callstack samples in a vector instead.	2011-11-02 13:23:07 -07:00
Joe Groff	2ddfdda7b5	vm: groundwork for sampling profiler ... Set up the state necessary to collect samples. We still need to add GC support for walking the sample set, and the compiler needs to register GC roots before safepoints as well. We also need primitives to expose the data to Factor for reporting.	2011-11-02 13:23:06 -07:00