From 1bc5aee63eb72b341f506ad058502cd0361f0d10 Mon Sep 17 00:00:00 2001
From: Ben Cheng <bccheng@google.com>
Date: Tue, 25 Mar 2014 22:37:19 -0700
Subject: Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
---
 gcc-4.9/libgo/runtime/panic.c | 145 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 gcc-4.9/libgo/runtime/panic.c

(limited to 'gcc-4.9/libgo/runtime/panic.c')

diff --git a/gcc-4.9/libgo/runtime/panic.c b/gcc-4.9/libgo/runtime/panic.c
new file mode 100644
index 000000000..8fe321f6a
--- /dev/null
+++ b/gcc-4.9/libgo/runtime/panic.c
@@ -0,0 +1,145 @@
+// 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 "malloc.h"
+#include "go-defer.h"
+#include "go-panic.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);
+		if (d->__free)
+		  runtime_free(d);
+	}
+}
+
+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();
+	if(m->dying) {
+		runtime_printf("panic during panic\n");
+		runtime_exit(3);
+	}
+	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();
+}
+
+void
+runtime_dopanic(int32 unused __attribute__ ((unused)))
+{
+	G *g;
+	static bool didothers;
+	bool crash;
+	int32 t;
+
+	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((t = runtime_gotraceback(&crash)) > 0){
+		if(g != runtime_m()->g0) {
+			runtime_printf("\n");
+			runtime_goroutineheader(g);
+			runtime_traceback();
+			runtime_printcreatedby(g);
+		} else if(t >= 2 || runtime_m()->throwing > 0) {
+			runtime_printf("\nruntime stack:\n");
+			runtime_traceback();
+		}
+		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);
+	}
+	
+	if(crash)
+		runtime_crash();
+
+	runtime_exit(2);
+}
+
+void
+runtime_throw(const char *s)
+{
+	M *mp;
+
+	mp = runtime_m();
+	if(mp->throwing == 0)
+		mp->throwing = 1;
+	runtime_startpanic();
+	runtime_printf("fatal error: %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()->mallocing) {
+		runtime_printf("panic: %s\n", s);
+		runtime_throw("panic during malloc");
+	}
+	if(runtime_m()->gcing) {
+		runtime_printf("panic: %s\n", s);
+		runtime_throw("panic during gc");
+	}
+	runtime_newErrorCString(s, &err);
+	runtime_panic(err);
+}
+
+void runtime_Goexit (void) __asm__ (GOSYM_PREFIX "runtime.Goexit");
+
+void
+runtime_Goexit(void)
+{
+	rundefer();
+	runtime_goexit();
+}
-- 
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