static void
mcommoninit(M *m)
{
// Add to runtime_allm so garbage collector doesn't free m
// when it is just in a register or thread-local storage.
m->alllink = runtime_allm;
// runtime_Cgocalls() iterates over allm w/o schedlock,
// so we need to publish it safely.
runtime_atomicstorep((void**)&runtime_allm, m);
m->id = runtime_sched.mcount++;
m->fastrand = 0x49f6428aUL + m->id;
if(m->mcache == nil)
m->mcache = runtime_allocmcache();
}
static void
mcommoninit(M *m)
{
m->id = runtime_sched.mcount++;
m->fastrand = 0x49f6428aUL + m->id + runtime_cputicks();
if(m->mcache == nil)
m->mcache = runtime_allocmcache();
runtime_callers(1, m->createstack, nelem(m->createstack));
// Add to runtime_allm so garbage collector doesn't free m
// when it is just in a register or thread-local storage.
m->alllink = runtime_allm;
// runtime_NumCgoCall() iterates over allm w/o schedlock,
// so we need to publish it safely.
runtime_atomicstorep(&runtime_allm, m);
}
void
runtime_startpanic(void)
{
M *m;
m = runtime_m();
if(runtime_mheap.cachealloc.size == 0) { // very early
runtime_printf("runtime: panic before malloc heap initialized\n");
m->mallocing = 1; // tell rest of panic not to try to malloc
} else if(m->mcache == nil) // can happen if called from signal handler or throw
m->mcache = runtime_allocmcache();
switch(m->dying) {
case 0:
m->dying = 1;
if(runtime_g() != nil)
runtime_g()->writebuf = nil;
runtime_xadd(&runtime_panicking, 1);
runtime_lock(&paniclk);
if(runtime_debug.schedtrace > 0 || runtime_debug.scheddetail > 0)
runtime_schedtrace(true);
runtime_freezetheworld();
return;
case 1:
// Something failed while panicing, probably the print of the
// argument to panic(). Just print a stack trace and exit.
m->dying = 2;
runtime_printf("panic during panic\n");
runtime_dopanic(0);
runtime_exit(3);
case 2:
// This is a genuine bug in the runtime, we couldn't even
// print the stack trace successfully.
m->dying = 3;
runtime_printf("stack trace unavailable\n");
runtime_exit(4);
default:
// Can't even print! Just exit.
runtime_exit(5);
}
}
