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Implemented u3t_boff for Linux.

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This commit is contained in:
Benjamin Summers 2018-11-12 12:20:32 -08:00
parent fab9cb7bf3
commit fa576b00d7
1 changed files with 35 additions and 53 deletions
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88
noun/trace.c
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@ -388,58 +388,34 @@ u3t_boot(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
_ct_lop_o = c3n;
#if defined(U3_OS_osx)
#if 1
#if defined(U3_OS_osx) || defined(U3_OS_linux)
// Register _ct_sigaction to be called on `SIGPROF`.
{
struct itimerval itm_v;
struct sigaction sig_s;
sigset_t set;
sig_s.__sigaction_u.__sa_handler = _ct_sigaction;
sig_s.sa_mask = 0;
sig_s.sa_flags = 0;
sigaction(SIGPROF, &sig_s, 0);
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_UNBLOCK, &set, NULL) ) {
perror("pthread_sigmask");
}
itm_v.it_interval.tv_sec = 0;
itm_v.it_interval.tv_usec = 10000;
// itm_v.it_interval.tv_usec = 100000;
itm_v.it_value = itm_v.it_interval;
setitimer(ITIMER_PROF, &itm_v, 0);
}
#endif
#elif defined(U3_OS_linux)
{
struct itimerval itm_v;
struct sigaction sig_s;
sigset_t set;
struct sigaction sig_s = {0};
sig_s.sa_handler = _ct_sigaction;
sigemptyset(&(sig_s.sa_mask));
sig_s.sa_flags = 0;
sigaction(SIGPROF, &sig_s, 0);
}
// Unblock `SIGPROF` for this thread (we will block it again when `u3t_boff` is called).
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_UNBLOCK, &set, NULL) ) {
perror("pthread_sigmask");
}
}
itm_v.it_interval.tv_sec = 0;
// Ask for SIGPROF to be sent every 10ms.
{
struct itimerval itm_v = {0};
itm_v.it_interval.tv_usec = 10000;
// itm_v.it_interval.tv_usec = 100000;
itm_v.it_value = itm_v.it_interval;
setitimer(ITIMER_PROF, &itm_v, 0);
}
#elif defined(U3_OS_bsd)
// TODO: support profiling on bsd
# error "Profiling isn't yet supported on BSD"
#else
# error "port: profiling"
#endif
@ -452,28 +428,34 @@ void
u3t_boff(void)
{
if ( u3C.wag_w & u3o_debug_cpu ) {
#if defined(U3_OS_osx)
struct sigaction sig_s;
struct itimerval itm_v;
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_BLOCK, &set, NULL) ) {
perror("pthread_sigmask");
#if defined(U3_OS_osx) || defined(U3_OS_linux)
// Mask SIGPROF signals in this thread (and this is the only
// thread that unblocked them).
{
sigset_t set;
sigemptyset(&set);
sigaddset(&set, SIGPROF);
if ( 0 != pthread_sigmask(SIG_BLOCK, &set, NULL) ) {
perror("pthread_sigmask");
}
}
itm_v.it_interval.tv_sec = 0;
itm_v.it_interval.tv_usec = 0;
itm_v.it_value = itm_v.it_interval;
// Disable the SIGPROF timer.
{
struct itimerval itm_v = {0};
setitimer(ITIMER_PROF, &itm_v, 0);
}
setitimer(ITIMER_PROF, &itm_v, 0);
sigaction(SIGPROF, &sig_s, 0);
// Ignore SIGPROF signals.
{
struct sigaction sig_s = {0};
sigemptyset(&(sig_s.sa_mask));
sig_s.sa_handler = SIG_IGN;
sigaction(SIGPROF, &sig_s, 0);
}
#elif defined(U3_OS_linux)
// TODO: support profiling on linux
#elif defined(U3_OS_bsd)
// TODO: support profiling on bsd
# error "Profiling isn't yet supported on BSD"
#else
# error "port: profiling"
#endif