diff options
Diffstat (limited to 'src/lib/eina/eina_debug_bt.c')
| -rw-r--r-- | src/lib/eina/eina_debug_bt.c | 85 |
1 files changed, 83 insertions, 2 deletions
diff --git a/src/lib/eina/eina_debug_bt.c b/src/lib/eina/eina_debug_bt.c index 21b067c395..f38dcd481a 100644 --- a/src/lib/eina/eina_debug_bt.c +++ b/src/lib/eina/eina_debug_bt.c @@ -37,7 +37,65 @@ #ifndef _WIN32 # include <signal.h> -# define SIG SIGPROF +// realtime signals guarantee a minimum of 8, so SIGRTMIN + 7 would be valid +// at a minimum, so let's choose + 6 ... second last of the minimum set. +// SIGRTMAX of course is defined too... note the manual pages for sigation say +// that it calls rt_sigaction transparently for us so... no need for anything +// else special +# ifdef SIGRTMIN +# define SIG (SIGRTMIN + 6) +# else +// OSX seems to not support posix RT signals... too old a kernel. so be partly +// broken on OSX in that a HUP signal will maybe cause a crash... but compiling +// with -pg would have guaranteed always caused a crash before anyway. +// given OSX only supports "old-style" signals like: +// +// #define SIGHUP 1 /* hangup */ +// #define SIGINT 2 /* interrupt */ +// #define SIGQUIT 3 /* quit */ +// #define SIGILL 4 /* illegal instruction (not reset when caught) */ +// #define SIGTRAP 5 /* trace trap (not reset when caught) */ +// #define SIGABRT 6 /* abort() */ +// #if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE)) +// # define SIGPOLL 7 /* pollable event ([XSR] generated, not supported) */ +// #else /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ +// # define SIGIOT SIGABRT /* compatibility */ +// # define SIGEMT 7 /* EMT instruction */ +// #endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */ +// #define SIGFPE 8 /* floating point exception */ +// #define SIGKILL 9 /* kill (cannot be caught or ignored) */ +// #define SIGBUS 10 /* bus error */ +// #define SIGSEGV 11 /* segmentation violation */ +// #define SIGSYS 12 /* bad argument to system call */ +// #define SIGPIPE 13 /* write on a pipe with no one to read it */ +// #define SIGALRM 14 /* alarm clock */ +// #define SIGTERM 15 /* software termination signal from kill */ +// #define SIGURG 16 /* urgent condition on IO channel */ +// #define SIGSTOP 17 /* sendable stop signal not from tty */ +// #define SIGTSTP 18 /* stop signal from tty */ +// #define SIGCONT 19 /* continue a stopped process */ +// #define SIGCHLD 20 /* to parent on child stop or exit */ +// #define SIGTTIN 21 /* to readers pgrp upon background tty read */ +// #define SIGTTOU 22 /* like TTIN for output if (tp->t_local<OSTOP) */ +// #if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) +// # define SIGIO 23 /* input/output possible signal */ +// #endif +// #define SIGXCPU 24 /* exceeded CPU time limit */ +// #define SIGXFSZ 25 /* exceeded file size limit */ +// #define SIGVTALRM 26 /* virtual time alarm */ +// #define SIGPROF 27 /* profiling time alarm */ +// #if (!defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)) +// # define SIGWINCH 28 /* window size changes */ +// # define SIGINFO 29 /* information request */ +// #endif +// #define SIGUSR1 30 /* user defined signal 1 */ +// #define SIGUSR2 31 /* user defined signal 2 */ +// +// (excerpt from OSX's signal.h - found at: +// http://github.com/st3fan/osx-10.9/blob/master/xnu-2422.1.72/bsd/sys/signal.h +// pasting here due to how difficult it was to find a signal list for OSX) +# define SIG SIGHUP +# endif #endif static Eina_Semaphore _wait_for_bts_sem; @@ -52,6 +110,10 @@ static int *_bt_cpu; static double _trace_t0 = 0.0; static Eina_Debug_Timer *_timer = NULL; +#ifndef _WIN32 +static struct sigaction old_sigprof_action; +#endif + void _eina_debug_dump_fhandle_bt(FILE *f, void **bt, int btlen) { @@ -196,6 +258,15 @@ _signal_init(void) #ifndef _WIN32 struct sigaction sa; + memset(&sa, 0, sizeof(struct sigaction)); + + sa.sa_handler = SIG_DFL; + sa.sa_sigaction = NULL; + sa.sa_flags = SA_RESTART | SA_SIGINFO; + sigemptyset(&sa.sa_mask); + sigaction(SIG, &sa, &old_sigprof_action); + + memset(&sa, 0, sizeof(struct sigaction)); // set up signal handler for our profiling signal - eevery thread should // obey this (this is the case on linux - other OSs may vary) sa.sa_sigaction = _signal_handler; @@ -213,6 +284,14 @@ _signal_init(void) } static void +_signal_shutdown(void) +{ +#ifndef _WIN32 + sigaction(SIG, &old_sigprof_action, NULL); +#endif +} + +static void _collect_bt(pthread_t pth) { // this async signals the thread to switch to the deebug signal handler @@ -290,6 +369,8 @@ static Eina_Bool _prof_on_cb(Eina_Debug_Session *session, int cid EINA_UNUSED, void *buffer, int size) { unsigned int time; + + _signal_init(); if (size >= 4) { memcpy(&time, buffer, 4); @@ -305,6 +386,7 @@ _prof_off_cb(Eina_Debug_Session *session EINA_UNUSED, int cid EINA_UNUSED, void { eina_debug_timer_del(_timer); _timer = NULL; + _signal_shutdown(); return EINA_TRUE; } @@ -317,7 +399,6 @@ EINA_DEBUG_OPCODES_ARRAY_DEFINE(_OPS, Eina_Bool _eina_debug_bt_init(void) { - _signal_init(); eina_semaphore_new(&_wait_for_bts_sem, 0); eina_debug_opcodes_register(NULL, _OPS(), NULL, NULL); return EINA_TRUE; |