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1 | /* Copyright (C) 2009-2013 Free Software Foundation, Inc. | |
2 | Contributed by Richard Henderson <rth@redhat.com>. | |
3 | ||
4 | This file is part of the GNU Transactional Memory Library (libitm). | |
5 | ||
6 | Libitm is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | Libitm is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
14 | more details. | |
15 | ||
16 | Under Section 7 of GPL version 3, you are granted additional | |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
24 | ||
25 | #include "libitm_i.h" | |
26 | ||
27 | using namespace GTM; | |
28 | ||
29 | /* Mangling the names by hand requires that we know how size_t is handled. | |
30 | We've gotten the letter from autoconf, now substitute it into the names. | |
31 | Everything below uses X as a placeholder for clarity. */ | |
32 | ||
33 | #define S1(x,y) x##y | |
34 | #define S(x,y) S1(x,y) | |
35 | ||
36 | #define _ZnwX S(_Znw,MANGLE_SIZE_T) | |
37 | #define _ZnaX S(_Zna,MANGLE_SIZE_T) | |
38 | #define _ZnwXRKSt9nothrow_t S(S(_Znw,MANGLE_SIZE_T),RKSt9nothrow_t) | |
39 | #define _ZnaXRKSt9nothrow_t S(S(_Zna,MANGLE_SIZE_T),RKSt9nothrow_t) | |
40 | ||
41 | #define _ZGTtnwX S(_ZGTtnw,MANGLE_SIZE_T) | |
42 | #define _ZGTtnaX S(_ZGTtna,MANGLE_SIZE_T) | |
43 | #define _ZGTtnwXRKSt9nothrow_t S(S(_ZGTtnw,MANGLE_SIZE_T),RKSt9nothrow_t) | |
44 | #define _ZGTtnaXRKSt9nothrow_t S(S(_ZGTtna,MANGLE_SIZE_T),RKSt9nothrow_t) | |
45 | ||
46 | /* Everything from libstdc++ is weak, to avoid requiring that library | |
47 | to be linked into plain C applications using libitm.so. */ | |
48 | ||
49 | extern "C" { | |
50 | ||
51 | extern void *_ZnwX (size_t) __attribute__((weak)); | |
52 | extern void _ZdlPv (void *) __attribute__((weak)); | |
53 | extern void *_ZnaX (size_t) __attribute__((weak)); | |
54 | extern void _ZdaPv (void *) __attribute__((weak)); | |
55 | ||
56 | typedef const struct nothrow_t { } *c_nothrow_p; | |
57 | ||
58 | extern void *_ZnwXRKSt9nothrow_t (size_t, c_nothrow_p) __attribute__((weak)); | |
59 | extern void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak)); | |
60 | extern void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) __attribute__((weak)); | |
61 | extern void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak)); | |
62 | ||
63 | #if !defined (HAVE_ELF_STYLE_WEAKREF) && !defined (__MACH__) | |
64 | void *_ZnwX (size_t) { return NULL; } | |
65 | void _ZdlPv (void *) { return; } | |
66 | void *_ZnaX (size_t) { return NULL; } | |
67 | void _ZdaPv (void *) { return; } | |
68 | ||
69 | void *_ZnwXRKSt9nothrow_t (size_t, c_nothrow_p) { return NULL; } | |
70 | void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) { return; } | |
71 | void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) { return NULL; } | |
72 | void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) { return; } | |
73 | #endif /* HAVE_ELF_STYLE_WEAKREF */ | |
74 | ||
75 | /* Wrap the delete nothrow symbols for usage with a single argument. | |
76 | Perhaps should have a configure type check for this, because the | |
77 | std::nothrow_t reference argument is unused (empty class), and most | |
78 | targets don't actually need that second argument. So we _could_ | |
79 | invoke these functions as if they were a single argument free. */ | |
80 | static void | |
81 | del_opnt (void *ptr) | |
82 | { | |
83 | _ZdlPvRKSt9nothrow_t (ptr, NULL); | |
84 | } | |
85 | ||
86 | static void | |
87 | del_opvnt (void *ptr) | |
88 | { | |
89 | _ZdaPvRKSt9nothrow_t (ptr, NULL); | |
90 | } | |
91 | ||
92 | /* Wrap: operator new (std::size_t sz) */ | |
93 | void * | |
94 | _ZGTtnwX (size_t sz) | |
95 | { | |
96 | void *r = _ZnwX (sz); | |
97 | if (r) | |
98 | gtm_thr()->record_allocation (r, _ZdlPv); | |
99 | return r; | |
100 | } | |
101 | ||
102 | /* Wrap: operator new (std::size_t sz, const std::nothrow_t&) */ | |
103 | void * | |
104 | _ZGTtnwXRKSt9nothrow_t (size_t sz, c_nothrow_p nt) | |
105 | { | |
106 | void *r = _ZnwXRKSt9nothrow_t (sz, nt); | |
107 | if (r) | |
108 | gtm_thr()->record_allocation (r, del_opnt); | |
109 | return r; | |
110 | } | |
111 | ||
112 | /* Wrap: operator new[] (std::size_t sz) */ | |
113 | void * | |
114 | _ZGTtnaX (size_t sz) | |
115 | { | |
116 | void *r = _ZnaX (sz); | |
117 | if (r) | |
118 | gtm_thr()->record_allocation (r, _ZdaPv); | |
119 | return r; | |
120 | } | |
121 | ||
122 | /* Wrap: operator new[] (std::size_t sz, const std::nothrow_t& nothrow) */ | |
123 | void * | |
124 | _ZGTtnaXRKSt9nothrow_t (size_t sz, c_nothrow_p nt) | |
125 | { | |
126 | void *r = _ZnaXRKSt9nothrow_t (sz, nt); | |
127 | if (r) | |
128 | gtm_thr()->record_allocation (r, del_opvnt); | |
129 | return r; | |
130 | } | |
131 | ||
132 | /* Wrap: operator delete(void* ptr) */ | |
133 | void | |
134 | _ZGTtdlPv (void *ptr) | |
135 | { | |
136 | if (ptr) | |
137 | gtm_thr()->forget_allocation (ptr, _ZdlPv); | |
138 | } | |
139 | ||
140 | /* Wrap: operator delete (void *ptr, const std::nothrow_t&) */ | |
141 | void | |
142 | _ZGTtdlPvRKSt9nothrow_t (void *ptr, c_nothrow_p nt UNUSED) | |
143 | { | |
144 | if (ptr) | |
145 | gtm_thr()->forget_allocation (ptr, del_opnt); | |
146 | } | |
147 | ||
148 | /* Wrap: operator delete[] (void *ptr) */ | |
149 | void | |
150 | _ZGTtdaPv (void *ptr) | |
151 | { | |
152 | if (ptr) | |
153 | gtm_thr()->forget_allocation (ptr, _ZdaPv); | |
154 | } | |
155 | ||
156 | /* Wrap: operator delete[] (void *ptr, const std::nothrow_t&) */ | |
157 | void | |
158 | _ZGTtdaPvRKSt9nothrow_t (void *ptr, c_nothrow_p nt UNUSED) | |
159 | { | |
160 | if (ptr) | |
161 | gtm_thr()->forget_allocation (ptr, del_opvnt); | |
162 | } | |
163 | ||
164 | } // extern "C" |