summaryrefslogtreecommitdiff
path: root/libitm/alloc_cpp.cc
blob: 85146189ff2d443adafa2269b2beba835e3028f6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/* Copyright (C) 2009-2015 Free Software Foundation, Inc.
   Contributed by Richard Henderson <rth@redhat.com>.

   This file is part of the GNU Transactional Memory Library (libitm).

   Libitm is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   Libitm is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
   FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   more details.

   Under Section 7 of GPL version 3, you are granted additional
   permissions described in the GCC Runtime Library Exception, version
   3.1, as published by the Free Software Foundation.

   You should have received a copy of the GNU General Public License and
   a copy of the GCC Runtime Library Exception along with this program;
   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
   <http://www.gnu.org/licenses/>.  */

#include "libitm_i.h"

using namespace GTM;

/* Mangling the names by hand requires that we know how size_t is handled.
   We've gotten the letter from autoconf, now substitute it into the names.
   Everything below uses X as a placeholder for clarity.  */

#define S1(x,y)			x##y
#define S(x,y)			S1(x,y)

#define _ZnwX			S(_Znw,MANGLE_SIZE_T)
#define _ZnaX			S(_Zna,MANGLE_SIZE_T)
#define _ZnwXRKSt9nothrow_t	S(S(_Znw,MANGLE_SIZE_T),RKSt9nothrow_t)
#define _ZnaXRKSt9nothrow_t	S(S(_Zna,MANGLE_SIZE_T),RKSt9nothrow_t)

#define _ZGTtnwX		S(_ZGTtnw,MANGLE_SIZE_T)
#define _ZGTtnaX		S(_ZGTtna,MANGLE_SIZE_T)
#define _ZGTtnwXRKSt9nothrow_t	S(S(_ZGTtnw,MANGLE_SIZE_T),RKSt9nothrow_t)
#define _ZGTtnaXRKSt9nothrow_t	S(S(_ZGTtna,MANGLE_SIZE_T),RKSt9nothrow_t)

/* Everything from libstdc++ is weak, to avoid requiring that library
   to be linked into plain C applications using libitm.so.  */

extern "C" {

extern void *_ZnwX (size_t) __attribute__((weak));
extern void _ZdlPv (void *) __attribute__((weak));
extern void *_ZnaX (size_t) __attribute__((weak));
extern void _ZdaPv (void *) __attribute__((weak));

typedef const struct nothrow_t { } *c_nothrow_p;

extern void *_ZnwXRKSt9nothrow_t (size_t, c_nothrow_p) __attribute__((weak));
extern void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak));
extern void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) __attribute__((weak));
extern void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) __attribute__((weak));

#if !defined (HAVE_ELF_STYLE_WEAKREF) 
void *_ZnwX (size_t) { return NULL; }
void _ZdlPv (void *) { return; }
void *_ZnaX (size_t) { return NULL; }
void _ZdaPv (void *) { return; }

void *_ZnwXRKSt9nothrow_t (size_t, c_nothrow_p) { return NULL; }
void _ZdlPvRKSt9nothrow_t (void *, c_nothrow_p) { return; }
void *_ZnaXRKSt9nothrow_t (size_t, c_nothrow_p) { return NULL; }
void _ZdaPvRKSt9nothrow_t (void *, c_nothrow_p) { return; }
#endif /* HAVE_ELF_STYLE_WEAKREF */

/* Wrap the delete nothrow symbols for usage with a single argument.
   Perhaps should have a configure type check for this, because the
   std::nothrow_t reference argument is unused (empty class), and most
   targets don't actually need that second argument.  So we _could_
   invoke these functions as if they were a single argument free.  */
static void
del_opnt (void *ptr)
{
  _ZdlPvRKSt9nothrow_t (ptr, NULL);
}

static void
del_opvnt (void *ptr)
{
  _ZdaPvRKSt9nothrow_t (ptr, NULL);
}

/* Wrap: operator new (std::size_t sz)  */
void *
_ZGTtnwX (size_t sz)
{
  void *r = _ZnwX (sz);
  if (r)
    gtm_thr()->record_allocation (r, _ZdlPv);
  return r;
}

/* Wrap: operator new (std::size_t sz, const std::nothrow_t&)  */
void *
_ZGTtnwXRKSt9nothrow_t (size_t sz, c_nothrow_p nt)
{
  void *r = _ZnwXRKSt9nothrow_t (sz, nt);
  if (r)
    gtm_thr()->record_allocation (r, del_opnt);
  return r;
}

/* Wrap: operator new[] (std::size_t sz)  */
void *
_ZGTtnaX (size_t sz)
{
  void *r = _ZnaX (sz);
  if (r)
    gtm_thr()->record_allocation (r, _ZdaPv);
  return r;
}

/* Wrap: operator new[] (std::size_t sz, const std::nothrow_t& nothrow)  */
void *
_ZGTtnaXRKSt9nothrow_t (size_t sz, c_nothrow_p nt)
{
  void *r = _ZnaXRKSt9nothrow_t (sz, nt);
  if (r)
    gtm_thr()->record_allocation (r, del_opvnt);
  return r;
}

/* Wrap: operator delete(void* ptr)  */
void
_ZGTtdlPv (void *ptr)
{
  if (ptr)
    gtm_thr()->forget_allocation (ptr, _ZdlPv);
}

/* Wrap: operator delete (void *ptr, const std::nothrow_t&)  */
void
_ZGTtdlPvRKSt9nothrow_t (void *ptr, c_nothrow_p nt UNUSED)
{
  if (ptr)
    gtm_thr()->forget_allocation (ptr, del_opnt);
}

/* Wrap: operator delete[] (void *ptr)  */
void
_ZGTtdaPv (void *ptr)
{
  if (ptr)
    gtm_thr()->forget_allocation (ptr, _ZdaPv);
}

/* Wrap: operator delete[] (void *ptr, const std::nothrow_t&)  */
void
_ZGTtdaPvRKSt9nothrow_t (void *ptr, c_nothrow_p nt UNUSED)
{
  if (ptr)
    gtm_thr()->forget_allocation (ptr, del_opvnt);
}

} // extern "C"