Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/runtime/cgo/gcc_freebsd_sigaction.c b/src/runtime/cgo/gcc_freebsd_sigaction.c
new file mode 100644
index 0000000..98b122d
--- /dev/null
+++ b/src/runtime/cgo/gcc_freebsd_sigaction.c
@@ -0,0 +1,80 @@
+// Copyright 2018 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.
+
+// +build freebsd,amd64
+
+#include <errno.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+#include <signal.h>
+
+#include "libcgo.h"
+
+// go_sigaction_t is a C version of the sigactiont struct from
+// os_freebsd.go.  This definition — and its conversion to and from struct
+// sigaction — are specific to freebsd/amd64.
+typedef struct {
+        uint32_t __bits[_SIG_WORDS];
+} go_sigset_t;
+typedef struct {
+	uintptr_t handler;
+	int32_t flags;
+	go_sigset_t mask;
+} go_sigaction_t;
+
+int32_t
+x_cgo_sigaction(intptr_t signum, const go_sigaction_t *goact, go_sigaction_t *oldgoact) {
+	int32_t ret;
+	struct sigaction act;
+	struct sigaction oldact;
+	size_t i;
+
+	_cgo_tsan_acquire();
+
+	memset(&act, 0, sizeof act);
+	memset(&oldact, 0, sizeof oldact);
+
+	if (goact) {
+		if (goact->flags & SA_SIGINFO) {
+			act.sa_sigaction = (void(*)(int, siginfo_t*, void*))(goact->handler);
+		} else {
+			act.sa_handler = (void(*)(int))(goact->handler);
+		}
+		sigemptyset(&act.sa_mask);
+		for (i = 0; i < 8 * sizeof(goact->mask); i++) {
+			if (goact->mask.__bits[i/32] & ((uint32_t)(1)<<(i&31))) {
+				sigaddset(&act.sa_mask, i+1);
+			}
+		}
+		act.sa_flags = goact->flags;
+	}
+
+	ret = sigaction(signum, goact ? &act : NULL, oldgoact ? &oldact : NULL);
+	if (ret == -1) {
+		// runtime.sigaction expects _cgo_sigaction to return errno on error.
+		_cgo_tsan_release();
+		return errno;
+	}
+
+	if (oldgoact) {
+		if (oldact.sa_flags & SA_SIGINFO) {
+			oldgoact->handler = (uintptr_t)(oldact.sa_sigaction);
+		} else {
+			oldgoact->handler = (uintptr_t)(oldact.sa_handler);
+		}
+		for (i = 0 ; i < _SIG_WORDS; i++) {
+			oldgoact->mask.__bits[i] = 0;
+		}
+		for (i = 0; i < 8 * sizeof(oldgoact->mask); i++) {
+			if (sigismember(&oldact.sa_mask, i+1) == 1) {
+				oldgoact->mask.__bits[i/32] |= (uint32_t)(1)<<(i&31);
+			}
+		}
+		oldgoact->flags = oldact.sa_flags;
+	}
+
+	_cgo_tsan_release();
+	return ret;
+}