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platform/linux: implement debug timers and cl_maxframetime to catch very long frames on debugger

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mittorn
2023-12-24 07:46:09 +03:00
committed by Alibek Omarov
parent a488f79852
commit b4a7c266b5
4 changed files with 58 additions and 0 deletions
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45
engine/platform/linux/sys_linux.c
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@@ -17,6 +17,10 @@ GNU General Public License for more details.
#include <stdlib.h>
#include <fcntl.h>
#include <dlfcn.h>
#include <signal.h>
#include <ucontext.h>
#include <time.h>
#include <unistd.h>
#include "platform/platform.h"
static void *g_hsystemd;
@@ -103,3 +107,44 @@ void Linux_Shutdown( void )
g_hsystemd = NULL;
}
}
static void Linux_TimerHandler( int sig, siginfo_t *si, void *uc )
{
timer_t *tidp = si->si_value.sival_ptr;
int overrun = timer_getoverrun( *tidp );
Con_Printf( "Frame too long (overrun %d)!\n", overrun );
}
#define DEBUG_TIMER_SIGNAL SIGRTMIN
void Linux_SetTimer( float tm )
{
static timer_t timerid;
if( !timerid && tm )
{
struct sigevent sev = { 0 };
struct sigaction sa = { 0 };
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = Linux_TimerHandler;
sigaction( DEBUG_TIMER_SIGNAL, &sa, NULL );
// this path availiable in POSIX, but may signal wrong thread...
// sev.sigev_notify = SIGEV_SIGNAL;
sev.sigev_notify = SIGEV_THREAD_ID;
sev._sigev_un._tid = gettid();
sev.sigev_signo = DEBUG_TIMER_SIGNAL;
sev.sigev_value.sival_ptr = &timerid;
timer_create( CLOCK_REALTIME, &sev, &timerid );
}
if( timerid )
{
struct itimerspec its = {0};
its.it_value.tv_sec = tm;
its.it_value.tv_nsec = 1000000000ULL * fmod( tm, 1.0f );
its.it_interval.tv_sec = 0;
its.it_interval.tv_nsec = 0;
timer_settime( timerid, 0, &its, NULL );
}
}