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unix/mpthreadport: Use SA_SIGINFO for GC signal handler.

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SA_SIGINFO allows the signal handler to access more information about
the signal, especially useful in a threaded environment.  The extra
information is not currently used but it may prove useful in the future.
This commit is contained in:
Damien George 2016-05-05 10:31:24 +00:00
parent 3653f5144a
commit c2508ac8bd
1 changed files with 7 additions and 3 deletions
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10
unix/mpthreadport.c
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@ -56,10 +56,14 @@ STATIC thread_t *thread;
STATIC volatile int thread_signal_done;
// this signal handler is used to scan the regs and stack of a thread
STATIC void mp_thread_gc(int signo) {
STATIC void mp_thread_gc(int signo, siginfo_t *info, void *context) {
if (signo == SIGUSR1) {
void gc_collect_regs_and_stack(void);
gc_collect_regs_and_stack();
// We have access to the context (regs, stack) of the thread but it seems
// that we don't need the extra information, enough is captured by the
// gc_collect_regs_and_stack function above
//gc_collect_root((void**)context, sizeof(ucontext_t) / sizeof(uintptr_t));
thread_signal_done = 1;
}
}
@ -77,8 +81,8 @@ void mp_thread_init(void) {
// enable signal handler for garbage collection
struct sigaction sa;
sa.sa_flags = 0;
sa.sa_handler = mp_thread_gc;
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = mp_thread_gc;
sigemptyset(&sa.sa_mask);
sigaction(SIGUSR1, &sa, NULL);
}