diff options
Diffstat (limited to 'src/pkg/runtime/panic.c')
| -rw-r--r-- | src/pkg/runtime/panic.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/src/pkg/runtime/panic.c b/src/pkg/runtime/panic.c index 7bd408aea8..73185273cb 100644 --- a/src/pkg/runtime/panic.c +++ b/src/pkg/runtime/panic.c @@ -355,19 +355,34 @@ runtime·startpanic(void) 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(); - if(m->dying) { + switch(m->dying) { + case 0: + m->dying = 1; + if(g != nil) + 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); // not reached + 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); } - m->dying = 1; - if(g != nil) - 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(); } void |