runtime/cgo: add cgo support for solaris/amd64

Change-Id: Ic9744c7716cdd53f27c6e5874230963e5fff0333
Reviewed-on: https://go-review.googlesource.com/8260
Reviewed-by: Minux Ma <minux@golang.org>

src/runtime/cgo/cgo.go

@@ -24,5 +24,7 @@ package cgo
 
 #cgo CFLAGS: -Wall -Werror
 
+#cgo solaris CPPFLAGS: -D_POSIX_PTHREAD_SEMANTICS
+
 */
 import "C"

src/runtime/cgo/gcc_libinit.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd
+// +build darwin dragonfly freebsd linux netbsd solaris
 // +build !ppc64,!ppc64le
 
 #include <pthread.h>

src/runtime/cgo/gcc_setenv.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 #include "libcgo.h"
 

src/runtime/cgo/gcc_solaris_amd64.c

@@ -0,0 +1,75 @@
+// Copyright 2015 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 <pthread.h>
+#include <string.h>
+#include <signal.h>
+#include <ucontext.h>
+#include "libcgo.h"
+
+static void* threadentry(void*);
+static void (*setg_gcc)(void*);
+
+void
+x_cgo_init(G *g, void (*setg)(void*))
+{
+	ucontext_t ctx;
+
+	setg_gcc = setg;
+	if (getcontext(&ctx) != 0)
+		perror("runtime/cgo: getcontext failed");
+	g->stacklo = (uintptr_t)ctx.uc_stack.ss_sp;
+}
+
+void
+_cgo_sys_thread_start(ThreadStart *ts)
+{
+	pthread_attr_t attr;
+	sigset_t ign, oset;
+	pthread_t p;
+	void *base;
+	size_t size;
+	int err;
+
+	sigfillset(&ign);
+	pthread_sigmask(SIG_SETMASK, &ign, &oset);
+
+	pthread_attr_init(&attr);
+
+	if (pthread_attr_getstack(&attr, &base, &size) != 0)
+		perror("runtime/cgo: pthread_attr_getstack failed");
+	if (size == 0) {
+		ts->g->stackhi = 2 << 20;
+		if (pthread_attr_setstack(&attr, NULL, ts->g->stackhi) != 0)
+			perror("runtime/cgo: pthread_attr_setstack failed");
+	} else {
+		ts->g->stackhi = size;
+	}
+	pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+	err = pthread_create(&p, &attr, threadentry, ts);
+
+	pthread_sigmask(SIG_SETMASK, &oset, nil);
+
+	if (err != 0) {
+		fprintf(stderr, "runtime/cgo: pthread_create failed: %s\n", strerror(err));
+		abort();
+	}
+}
+
+static void*
+threadentry(void *v)
+{
+	ThreadStart ts;
+
+	ts = *(ThreadStart*)v;
+	free(v);
+
+	/*
+	 * Set specific keys.
+	 */
+	setg_gcc((void*)ts.g);
+
+	crosscall_amd64(ts.fn);
+	return nil;
+}

src/runtime/cgo/setenv.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package cgo