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
17 /**
18 * Declaration of symbols to hold struct size and member offset information
19 */
20
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
ompd_init()43 void ompd_init() {
44
45 static int ompd_initialized = 0;
46
47 if (ompd_initialized)
48 return;
49
50 /**
51 * Calculate member offsets for structs and unions
52 */
53
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
59 /**
60 * Create bit mask for bitfield access
61 */
62
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
69 /**
70 * Calculate type size information
71 */
72
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
ompd_dll_locations_valid(void)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
ompd_bp_parallel_begin(void)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 }
ompd_bp_parallel_end(void)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 }
ompd_bp_task_begin(void)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 }
ompd_bp_task_end(void)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 }
ompd_bp_thread_begin(void)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 }
ompd_bp_thread_end(void)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 */
155