Imported Upstream version 1.4upstream/1.4

1 files changed, 100 insertions, 0 deletions

diff --git a/src/runtime/mem_freebsd.c b/src/runtime/mem_freebsd.c
new file mode 100644
index 000000000..18a9a2f5b
--- /dev/null
+++ b/src/runtime/mem_freebsd.c
@@ -0,0 +1,100 @@
+// Copyright 2010 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 "arch_GOARCH.h"
+#include "defs_GOOS_GOARCH.h"
+#include "os_GOOS.h"
+#include "malloc.h"
+#include "textflag.h"
+
+enum
+{
+	ENOMEM = 12,
+};
+
+#pragma textflag NOSPLIT
+void*
+runtime·sysAlloc(uintptr n, uint64 *stat)
+{
+	void *v;
+
+	v = runtime·mmap(nil, n, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
+	if(v < (void*)4096)
+		return nil;
+	runtime·xadd64(stat, n);
+	return v;
+}
+
+void
+runtime·SysUnused(void *v, uintptr n)
+{
+	runtime·madvise(v, n, MADV_FREE);
+}
+
+void
+runtime·SysUsed(void *v, uintptr n)
+{
+	USED(v);
+	USED(n);
+}
+
+void
+runtime·SysFree(void *v, uintptr n, uint64 *stat)
+{
+	runtime·xadd64(stat, -(uint64)n);
+	runtime·munmap(v, n);
+}
+
+void
+runtime·SysFault(void *v, uintptr n)
+{
+	runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE|MAP_FIXED, -1, 0);
+}
+
+void*
+runtime·SysReserve(void *v, uintptr n, bool *reserved)
+{
+	void *p;
+
+	// On 64-bit, people with ulimit -v set complain if we reserve too
+	// much address space.  Instead, assume that the reservation is okay
+	// and check the assumption in SysMap.
+	if(sizeof(void*) == 8 && n > 1LL<<32) {
+		*reserved = false;
+		return v;
+	}
+
+	*reserved = true;
+	p = runtime·mmap(v, n, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
+	if(p < (void*)4096)
+		return nil;
+	return p;
+}
+
+void
+runtime·SysMap(void *v, uintptr n, bool reserved, uint64 *stat)
+{
+	void *p;
+	
+	runtime·xadd64(stat, n);
+
+	// On 64-bit, we don't actually have v reserved, so tread carefully.
+	if(!reserved) {
+		p = runtime·mmap(v, n, PROT_READ|PROT_WRITE, MAP_ANON|MAP_PRIVATE, -1, 0);
+		if(p == (void*)ENOMEM)
+			runtime·throw("runtime: out of memory");
+		if(p != v) {
+			runtime·printf("runtime: address space conflict: map(%p) = %p\n", v, p);
+			runtime·throw("runtime: address space conflict");
+		}
+		return;
+	}
+
+	p = runtime·mmap(v, n, PROT_READ|PROT_WRITE, MAP_ANON|MAP_FIXED|MAP_PRIVATE, -1, 0);
+	if(p == (void*)ENOMEM)
+		runtime·throw("runtime: out of memory");
+	if(p != v)
+		runtime·throw("runtime: cannot map pages in arena address space");
+}