Squashed 'third_party/gperftools/' content from commit 54505f1
Change-Id: Id02e833828732b0efe7dac722b8485279e67c5fa
git-subtree-dir: third_party/gperftools
git-subtree-split: 54505f1d50c2d1f4676f5e87090b64a117fd980e
diff --git a/src/malloc_hook_mmap_freebsd.h b/src/malloc_hook_mmap_freebsd.h
new file mode 100644
index 0000000..8575dcc
--- /dev/null
+++ b/src/malloc_hook_mmap_freebsd.h
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+// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
+// Copyright (c) 2011, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Override mmap/munmap/mremap/sbrk to provide support for calling the
+// related hooks (in addition, of course, to doing what these
+// functions normally do).
+
+#ifndef __FreeBSD__
+# error Should only be including malloc_hook_mmap_freebsd.h on FreeBSD systems.
+#endif
+
+#include <unistd.h>
+#include <sys/syscall.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <dlfcn.h>
+
+// Make sure mmap doesn't get #define'd away by <sys/mman.h>
+#undef mmap
+
+// According to the FreeBSD documentation, use syscall if you do not
+// need 64-bit alignment otherwise use __syscall. Indeed, syscall
+// doesn't work correctly in most situations on 64-bit. It's return
+// type is 'int' so for things like SYS_mmap, it actually truncates
+// the returned address to 32-bits.
+#if defined(__amd64__) || defined(__x86_64__)
+# define MALLOC_HOOK_SYSCALL __syscall
+#else
+# define MALLOC_HOOK_SYSCALL syscall
+#endif
+
+
+extern "C" {
+ void* mmap(void *start, size_t length,int prot, int flags,
+ int fd, off_t offset) __THROW
+ ATTRIBUTE_SECTION(malloc_hook);
+ int munmap(void* start, size_t length) __THROW
+ ATTRIBUTE_SECTION(malloc_hook);
+ void* sbrk(intptr_t increment) __THROW
+ ATTRIBUTE_SECTION(malloc_hook);
+}
+
+static inline void* do_mmap(void *start, size_t length,
+ int prot, int flags,
+ int fd, off_t offset) __THROW {
+ return (void *)MALLOC_HOOK_SYSCALL(SYS_mmap,
+ start, length, prot, flags, fd, offset);
+}
+
+static inline void* do_sbrk(intptr_t increment) {
+ static void *(*libc_sbrk)(intptr_t);
+ if (libc_sbrk == NULL)
+ libc_sbrk = (void *(*)(intptr_t))dlsym(RTLD_NEXT, "sbrk");
+
+ return libc_sbrk(increment);
+}
+
+
+extern "C" void* mmap(void *start, size_t length, int prot, int flags,
+ int fd, off_t offset) __THROW {
+ MallocHook::InvokePreMmapHook(start, length, prot, flags, fd, offset);
+ void *result;
+ if (!MallocHook::InvokeMmapReplacement(
+ start, length, prot, flags, fd, offset, &result)) {
+ result = do_mmap(start, length, prot, flags, fd,
+ static_cast<size_t>(offset)); // avoid sign extension
+ }
+ MallocHook::InvokeMmapHook(result, start, length, prot, flags, fd, offset);
+ return result;
+}
+
+extern "C" int munmap(void* start, size_t length) __THROW {
+ MallocHook::InvokeMunmapHook(start, length);
+ int result;
+ if (!MallocHook::InvokeMunmapReplacement(start, length, &result)) {
+ result = MALLOC_HOOK_SYSCALL(SYS_munmap, start, length);
+ }
+
+ return result;
+}
+
+extern "C" void* sbrk(intptr_t increment) __THROW {
+ MallocHook::InvokePreSbrkHook(increment);
+ void *result = do_sbrk(increment);
+ MallocHook::InvokeSbrkHook(result, increment);
+ return result;
+}
+
+/*static*/void* MallocHook::UnhookedMMap(void *start, size_t length, int prot,
+ int flags, int fd, off_t offset) {
+ void* result;
+ if (!MallocHook::InvokeMmapReplacement(
+ start, length, prot, flags, fd, offset, &result)) {
+ result = do_mmap(start, length, prot, flags, fd, offset);
+ }
+
+ return result;
+}
+
+/*static*/int MallocHook::UnhookedMUnmap(void *start, size_t length) {
+ int result;
+ if (!MallocHook::InvokeMunmapReplacement(start, length, &result)) {
+ result = MALLOC_HOOK_SYSCALL(SYS_munmap, start, length);
+ }
+ return result;
+}
+
+#undef MALLOC_HOOK_SYSCALL