1 files changed, 115 insertions, 0 deletions
diff --git a/libgo/runtime/panic.c b/libgo/runtime/panic.c
new file mode 100644
index 0000000..98326c6
--- /dev/null
+++ b/libgo/runtime/panic.c
@@ -0,0 +1,115 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "runtime.h"
+#include "go-defer.h"
+
+// Code related to defer, panic and recover.
+
+uint32 runtime_panicking;
+static Lock paniclk;
+
+// Run all deferred functions for the current goroutine.
+static void
+rundefer(void)
+{
+	G *g;
+	Defer *d;
+
+	g = runtime_g();
+	while((d = g->defer) != nil) {
+		void (*pfn)(void*);
+
+		g->defer = d->__next;
+		pfn = d->__pfn;
+		d->__pfn = nil;
+		if (pfn != nil)
+			(*pfn)(d->__arg);
+		runtime_free(d);
+	}
+}
+
+void
+runtime_startpanic(void)
+{
+	M *m;
+
+	m = runtime_m();
+	if(m->dying) {
+		runtime_printf("panic during panic\n");
+		runtime_exit(3);
+	}
+	m->dying = 1;
+	runtime_xadd(&runtime_panicking, 1);
+	runtime_lock(&paniclk);
+}
+
+void
+runtime_dopanic(int32 unused __attribute__ ((unused)))
+{
+	G *g;
+	static bool didothers;
+
+	g = runtime_g();
+	if(g->sig != 0)
+		runtime_printf("[signal %x code=%p addr=%p]\n",
+			       g->sig, (void*)g->sigcode0, (void*)g->sigcode1);
+
+	if(runtime_gotraceback()){
+		if(g != runtime_m()->g0) {
+			runtime_printf("\n");
+			runtime_goroutineheader(g);
+			runtime_traceback();
+			runtime_goroutinetrailer(g);
+		}
+		if(!didothers) {
+			didothers = true;
+			runtime_tracebackothers(g);
+		}
+	}
+	runtime_unlock(&paniclk);
+	if(runtime_xadd(&runtime_panicking, -1) != 0) {
+		// Some other m is panicking too.
+		// Let it print what it needs to print.
+		// Wait forever without chewing up cpu.
+		// It will exit when it's done.
+		static Lock deadlock;
+		runtime_lock(&deadlock);
+		runtime_lock(&deadlock);
+	}
+
+	runtime_exit(2);
+}
+
+void
+runtime_throw(const char *s)
+{
+	runtime_startpanic();
+	runtime_printf("throw: %s\n", s);
+	runtime_dopanic(0);
+	*(int32*)0 = 0;	// not reached
+	runtime_exit(1);	// even more not reached
+}
+
+void
+runtime_panicstring(const char *s)
+{
+	Eface err;
+
+	if(runtime_m()->gcing) {
+		runtime_printf("panic: %s\n", s);
+		runtime_throw("panic during gc");
+	}
+	runtime_newErrorString(runtime_gostringnocopy((const byte*)s), &err);
+	runtime_panic(err);
+}
+
+void runtime_Goexit (void) asm ("runtime.Goexit");
+
+void
+runtime_Goexit(void)
+{
+	rundefer();
+	runtime_goexit();
+}