OLD | NEW |
| (Empty) |
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 // This .h file imports the code that causes tcmalloc to override libc | |
34 // versions of malloc/free/new/delete/etc. That is, it provides the | |
35 // logic that makes it so calls to malloc(10) go through tcmalloc, | |
36 // rather than the default (libc) malloc. | |
37 // | |
38 // This file also provides a method: ReplaceSystemAlloc(), that every | |
39 // libc_override_*.h file it #includes is required to provide. This | |
40 // is called when first setting up tcmalloc -- that is, when a global | |
41 // constructor in tcmalloc.cc is executed -- to do any initialization | |
42 // work that may be required for this OS. (Note we cannot entirely | |
43 // control when tcmalloc is initialized, and the system may do some | |
44 // mallocs and frees before this routine is called.) It may be a | |
45 // noop. | |
46 // | |
47 // Every libc has its own way of doing this, and sometimes the compiler | |
48 // matters too, so we have a different file for each libc, and often | |
49 // for different compilers and OS's. | |
50 | |
51 #ifndef TCMALLOC_LIBC_OVERRIDE_INL_H_ | |
52 #define TCMALLOC_LIBC_OVERRIDE_INL_H_ | |
53 | |
54 #include <config.h> | |
55 #ifdef HAVE_FEATURES_H | |
56 #include <features.h> // for __GLIBC__ | |
57 #endif | |
58 #include <gperftools/tcmalloc.h> | |
59 | |
60 static void ReplaceSystemAlloc(); // defined in the .h files below | |
61 | |
62 // For windows, there are two ways to get tcmalloc. If we're | |
63 // patching, then src/windows/patch_function.cc will do the necessary | |
64 // overriding here. Otherwise, we doing the 'redefine' trick, where | |
65 // we remove malloc/new/etc from mscvcrt.dll, and just need to define | |
66 // them now. | |
67 #if defined(_WIN32) && defined(WIN32_DO_PATCHING) | |
68 void PatchWindowsFunctions(); // in src/windows/patch_function.cc | |
69 static void ReplaceSystemAlloc() { PatchWindowsFunctions(); } | |
70 | |
71 #elif defined(_WIN32) && !defined(WIN32_DO_PATCHING) | |
72 // "libc_override_redefine.h" is included in the original gperftools. But, | |
73 // we define allocator functions in Chromium's base/allocator/allocator_shim.cc | |
74 // on Windows. We don't include libc_override_redefine.h here. | |
75 // ReplaceSystemAlloc() is defined here instead. | |
76 static void ReplaceSystemAlloc() { } | |
77 | |
78 #elif defined(__APPLE__) | |
79 #include "libc_override_osx.h" | |
80 | |
81 #elif defined(__GLIBC__) | |
82 #include "libc_override_glibc.h" | |
83 | |
84 // Not all gcc systems necessarily support weak symbols, but all the | |
85 // ones I know of do, so for now just assume they all do. | |
86 #elif defined(__GNUC__) | |
87 #include "libc_override_gcc_and_weak.h" | |
88 | |
89 #else | |
90 #error Need to add support for your libc/OS here | |
91 | |
92 #endif | |
93 | |
94 #endif // TCMALLOC_LIBC_OVERRIDE_INL_H_ | |
OLD | NEW |