Index: third_party/tcmalloc/chromium/src/malloc_hook_mmap_freebsd.h |
diff --git a/third_party/tcmalloc/chromium/src/malloc_hook_mmap_freebsd.h b/third_party/tcmalloc/chromium/src/malloc_hook_mmap_freebsd.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..dae868c3e093a5aebc378b53d39602057aea275c |
--- /dev/null |
+++ b/third_party/tcmalloc/chromium/src/malloc_hook_mmap_freebsd.h |
@@ -0,0 +1,165 @@ |
+// 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> |
+ |
+// 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) { |
+ void* curbrk = 0; |
+ |
+#if defined(__x86_64__) || defined(__amd64__) |
+# ifdef PIC |
+ __asm__ __volatile__( |
+ "movq .curbrk@GOTPCREL(%%rip), %%rdx;" |
+ "movq (%%rdx), %%rax;" |
+ "movq %%rax, %0;" |
+ : "=r" (curbrk) |
+ :: "%rdx", "%rax"); |
+# else |
+ __asm__ __volatile__( |
+ "movq .curbrk(%%rip), %%rax;" |
+ "movq %%rax, %0;" |
+ : "=r" (curbrk) |
+ :: "%rax"); |
+# endif |
+#else |
+ __asm__ __volatile__( |
+ "movl .curbrk, %%eax;" |
+ "movl %%eax, %0;" |
+ : "=r" (curbrk) |
+ :: "%eax"); |
+#endif |
+ |
+ if (increment == 0) { |
+ return curbrk; |
+ } |
+ |
+ char* prevbrk = static_cast<char*>(curbrk); |
+ void* newbrk = prevbrk + increment; |
+ |
+ if (brk(newbrk) == -1) { |
+ return reinterpret_cast<void*>(static_cast<intptr_t>(-1)); |
+ } |
+ |
+ return prevbrk; |
+} |
+ |
+ |
+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 |