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1 // Copyright (c) 2011, Google Inc. | |
2 // All rights reserved. | |
3 // | |
4 // Redistribution and use in source and binary forms, with or without | |
5 // modification, are permitted provided that the following conditions are | |
6 // met: | |
7 // | |
8 // * Redistributions of source code must retain the above copyright | |
9 // notice, this list of conditions and the following disclaimer. | |
10 // * Redistributions in binary form must reproduce the above | |
11 // copyright notice, this list of conditions and the following disclaimer | |
12 // in the documentation and/or other materials provided with the | |
13 // distribution. | |
14 // * Neither the name of Google Inc. nor the names of its | |
15 // contributors may be used to endorse or promote products derived from | |
16 // this software without specific prior written permission. | |
17 // | |
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 | |
30 // --- | |
31 // Author: Craig Silverstein <opensource@google.com> | |
32 // | |
33 // Used to override malloc routines on systems that define the | |
34 // memory allocation routines to be weak symbols in their libc | |
35 // (almost all unix-based systems are like this), on gcc, which | |
36 // suppports the 'alias' attribute. | |
37 | |
38 #ifndef TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_ | |
39 #define TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_ | |
40 | |
41 #ifdef HAVE_SYS_CDEFS_H | |
42 #include <sys/cdefs.h> // for __THROW | |
43 #endif | |
44 #include <gperftools/tcmalloc.h> | |
45 | |
46 #ifndef __THROW // I guess we're not on a glibc-like system | |
47 # define __THROW // __THROW is just an optimization, so ok to make it "" | |
48 #endif | |
49 | |
50 #ifndef __GNUC__ | |
51 # error libc_override_gcc_and_weak.h is for gcc distributions only. | |
52 #endif | |
53 | |
54 #define ALIAS(tc_fn) __attribute__ ((alias (#tc_fn))) | |
55 | |
56 void* operator new(size_t size) throw (std::bad_alloc) | |
57 ALIAS(tc_new); | |
58 void operator delete(void* p) __THROW | |
59 ALIAS(tc_delete); | |
60 void* operator new[](size_t size) throw (std::bad_alloc) | |
61 ALIAS(tc_newarray); | |
62 void operator delete[](void* p) __THROW | |
63 ALIAS(tc_deletearray); | |
64 void* operator new(size_t size, const std::nothrow_t& nt) __THROW | |
65 ALIAS(tc_new_nothrow); | |
66 void* operator new[](size_t size, const std::nothrow_t& nt) __THROW | |
67 ALIAS(tc_newarray_nothrow); | |
68 void operator delete(void* p, const std::nothrow_t& nt) __THROW | |
69 ALIAS(tc_delete_nothrow); | |
70 void operator delete[](void* p, const std::nothrow_t& nt) __THROW | |
71 ALIAS(tc_deletearray_nothrow); | |
72 | |
73 extern "C" { | |
74 void* malloc(size_t size) __THROW ALIAS(tc_malloc); | |
75 void free(void* ptr) __THROW ALIAS(tc_free); | |
76 void* realloc(void* ptr, size_t size) __THROW ALIAS(tc_realloc); | |
77 void* calloc(size_t n, size_t size) __THROW ALIAS(tc_calloc); | |
78 void cfree(void* ptr) __THROW ALIAS(tc_cfree); | |
79 void* memalign(size_t align, size_t s) __THROW ALIAS(tc_memalign); | |
80 void* valloc(size_t size) __THROW ALIAS(tc_valloc); | |
81 void* pvalloc(size_t size) __THROW ALIAS(tc_pvalloc); | |
82 int posix_memalign(void** r, size_t a, size_t s) __THROW | |
83 ALIAS(tc_posix_memalign); | |
84 void malloc_stats(void) __THROW ALIAS(tc_malloc_stats); | |
85 int mallopt(int cmd, int value) __THROW ALIAS(tc_mallopt); | |
86 #ifdef HAVE_STRUCT_MALLINFO | |
87 struct mallinfo mallinfo(void) __THROW ALIAS(tc_mallinfo); | |
88 #endif | |
89 size_t malloc_size(void* p) __THROW ALIAS(tc_malloc_size); | |
90 size_t malloc_usable_size(void* p) __THROW ALIAS(tc_malloc_size); | |
91 } // extern "C" | |
92 | |
93 #undef ALIAS | |
94 | |
95 // No need to do anything at tcmalloc-registration time: we do it all | |
96 // via overriding weak symbols (at link time). | |
97 static void ReplaceSystemAlloc() { } | |
98 | |
99 #endif // TCMALLOC_LIBC_OVERRIDE_GCC_AND_WEAK_INL_H_ | |
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