LLVM OpenMP* Runtime Library
ompd-specific.cpp
1 /*
2  * ompd-specific.cpp -- OpenMP debug support
3  */
4 
5 //===----------------------------------------------------------------------===//
6 //
7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
8 // See https://llvm.org/LICENSE.txt for license information.
9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #include "ompd-specific.h"
14 
15 #if OMPD_SUPPORT
16 
21 #define ompd_declare_access(t, m) uint64_t ompd_access__##t##__##m;
22 OMPD_FOREACH_ACCESS(ompd_declare_access)
23 #undef ompd_declare_access
24 
25 #define ompd_declare_sizeof_member(t, m) uint64_t ompd_sizeof__##t##__##m;
26 OMPD_FOREACH_ACCESS(ompd_declare_sizeof_member)
27 #undef ompd_declare_sizeof_member
28 
29 #define ompd_declare_bitfield(t, m) uint64_t ompd_bitfield__##t##__##m;
30 OMPD_FOREACH_BITFIELD(ompd_declare_bitfield)
31 #undef ompd_declare_bitfield
32 
33 #define ompd_declare_sizeof(t) uint64_t ompd_sizeof__##t;
34 OMPD_FOREACH_SIZEOF(ompd_declare_sizeof)
35 #undef ompd_declare_sizeof
36 
37 volatile const char **ompd_dll_locations = NULL;
38 uint64_t ompd_state = 0;
39 
40 char *ompd_env_block = NULL;
41 ompd_size_t ompd_env_block_size = 0;
42 
43 void ompd_init() {
44 
45  static int ompd_initialized = 0;
46 
47  if (ompd_initialized)
48  return;
49 
54 #define ompd_init_access(t, m) \
55  ompd_access__##t##__##m = (uint64_t) & (((t *)0)->m);
56  OMPD_FOREACH_ACCESS(ompd_init_access)
57 #undef ompd_init_access
58 
63 #define ompd_init_bitfield(t, m) \
64  ompd_bitfield__##t##__##m = 0; \
65  ((t *)(&ompd_bitfield__##t##__##m))->m = 1;
66  OMPD_FOREACH_BITFIELD(ompd_init_bitfield)
67 #undef ompd_init_bitfield
68 
73 #define ompd_init_sizeof_member(t, m) \
74  ompd_sizeof__##t##__##m = sizeof(((t *)0)->m);
75  OMPD_FOREACH_ACCESS(ompd_init_sizeof_member)
76 #undef ompd_init_sizeof_member
77 
78 #define ompd_init_sizeof(t) ompd_sizeof__##t = sizeof(t);
79  OMPD_FOREACH_SIZEOF(ompd_init_sizeof)
80 #undef ompd_init_sizeof
81 
82  char *libname = NULL;
83 
84 #if KMP_OS_UNIX
85  // Find the location of libomp.so thru dladdr and replace the libomp with
86  // libompd to get the full path of libompd
87  Dl_info dl_info;
88  int ret = dladdr((void *)ompd_init, &dl_info);
89  if (!ret) {
90  fprintf(stderr, "%s\n", dlerror());
91  }
92  int lib_path_length;
93  if (strrchr(dl_info.dli_fname, '/')) {
94  lib_path_length = strrchr(dl_info.dli_fname, '/') - dl_info.dli_fname;
95  libname =
96  (char *)malloc(lib_path_length + 12 /*for '/libompd.so' and '\0'*/);
97  strncpy(libname, dl_info.dli_fname, lib_path_length);
98  memcpy(libname + lib_path_length, "/libompd.so\0", 12);
99  }
100 #endif
101 
102  const char *ompd_env_var = getenv("OMP_DEBUG");
103  if (ompd_env_var && !strcmp(ompd_env_var, "enabled")) {
104  fprintf(stderr, "OMP_OMPD active\n");
105  ompt_enabled.enabled = 1;
106  ompd_state |= OMPD_ENABLE_BP;
107  }
108 
109  ompd_initialized = 1;
110  ompd_dll_locations = (volatile const char **)malloc(3 * sizeof(const char *));
111  ompd_dll_locations[0] = "libompd.so";
112  ompd_dll_locations[1] = libname;
113  ompd_dll_locations[2] = NULL;
114  ompd_dll_locations_valid();
115 }
116 
117 void __attribute__((noinline)) ompd_dll_locations_valid(void) {
118  /* naive way of implementing hard to opt-out empty function
119  we might want to use a separate object file? */
120  asm("");
121 }
122 
123 void ompd_bp_parallel_begin(void) {
124  /* naive way of implementing hard to opt-out empty function
125  we might want to use a separate object file? */
126  asm("");
127 }
128 void ompd_bp_parallel_end(void) {
129  /* naive way of implementing hard to opt-out empty function
130  we might want to use a separate object file? */
131  asm("");
132 }
133 void ompd_bp_task_begin(void) {
134  /* naive way of implementing hard to opt-out empty function
135  we might want to use a separate object file? */
136  asm("");
137 }
138 void ompd_bp_task_end(void) {
139  /* naive way of implementing hard to opt-out empty function
140  we might want to use a separate object file? */
141  asm("");
142 }
143 void ompd_bp_thread_begin(void) {
144  /* naive way of implementing hard to opt-out empty function
145  we might want to use a separate object file? */
146  asm("");
147 }
148 void ompd_bp_thread_end(void) {
149  /* naive way of implementing hard to opt-out empty function
150  we might want to use a separate object file? */
151  asm("");
152 }
153 
154 #endif /* OMPD_SUPPORT */