1 /* 2 * ompt-general.cpp -- OMPT implementation of interface functions 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 /***************************************************************************** 14 * system include files 15 ****************************************************************************/ 16 17 #include <assert.h> 18 19 #include <stdint.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <string.h> 23 #if KMP_OS_UNIX 24 #include <dlfcn.h> 25 #endif 26 27 /***************************************************************************** 28 * ompt include files 29 ****************************************************************************/ 30 31 #include "ompt-specific.cpp" 32 33 /***************************************************************************** 34 * macros 35 ****************************************************************************/ 36 37 #define ompt_get_callback_success 1 38 #define ompt_get_callback_failure 0 39 40 #define no_tool_present 0 41 42 #define OMPT_API_ROUTINE static 43 44 #ifndef OMPT_STR_MATCH 45 #define OMPT_STR_MATCH(haystack, needle) (!strcasecmp(haystack, needle)) 46 #endif 47 48 /***************************************************************************** 49 * types 50 ****************************************************************************/ 51 52 typedef struct { 53 const char *state_name; 54 ompt_state_t state_id; 55 } ompt_state_info_t; 56 57 typedef struct { 58 const char *name; 59 kmp_mutex_impl_t id; 60 } kmp_mutex_impl_info_t; 61 62 enum tool_setting_e { 63 omp_tool_error, 64 omp_tool_unset, 65 omp_tool_disabled, 66 omp_tool_enabled 67 }; 68 69 /***************************************************************************** 70 * global variables 71 ****************************************************************************/ 72 73 ompt_callbacks_active_t ompt_enabled; 74 75 ompt_state_info_t ompt_state_info[] = { 76 #define ompt_state_macro(state, code) {#state, state}, 77 FOREACH_OMPT_STATE(ompt_state_macro) 78 #undef ompt_state_macro 79 }; 80 81 kmp_mutex_impl_info_t kmp_mutex_impl_info[] = { 82 #define kmp_mutex_impl_macro(name, id) {#name, name}, 83 FOREACH_KMP_MUTEX_IMPL(kmp_mutex_impl_macro) 84 #undef kmp_mutex_impl_macro 85 }; 86 87 ompt_callbacks_internal_t ompt_callbacks; 88 89 static ompt_start_tool_result_t *ompt_start_tool_result = NULL; 90 91 /***************************************************************************** 92 * forward declarations 93 ****************************************************************************/ 94 95 static ompt_interface_fn_t ompt_fn_lookup(const char *s); 96 97 OMPT_API_ROUTINE ompt_data_t *ompt_get_thread_data(void); 98 99 /***************************************************************************** 100 * initialization and finalization (private operations) 101 ****************************************************************************/ 102 103 typedef ompt_start_tool_result_t *(*ompt_start_tool_t)(unsigned int, 104 const char *); 105 106 #if KMP_OS_DARWIN 107 108 // While Darwin supports weak symbols, the library that wishes to provide a new 109 // implementation has to link against this runtime which defeats the purpose 110 // of having tools that are agnostic of the underlying runtime implementation. 111 // 112 // Fortunately, the linker includes all symbols of an executable in the global 113 // symbol table by default so dlsym() even finds static implementations of 114 // ompt_start_tool. For this to work on Linux, -Wl,--export-dynamic needs to be 115 // passed when building the application which we don't want to rely on. 116 117 static ompt_start_tool_result_t *ompt_tool_darwin(unsigned int omp_version, 118 const char *runtime_version) { 119 ompt_start_tool_result_t *ret = NULL; 120 // Search symbol in the current address space. 121 ompt_start_tool_t start_tool = 122 (ompt_start_tool_t)dlsym(RTLD_DEFAULT, "ompt_start_tool"); 123 if (start_tool) { 124 ret = start_tool(omp_version, runtime_version); 125 } 126 return ret; 127 } 128 129 #elif OMPT_HAVE_WEAK_ATTRIBUTE 130 131 // On Unix-like systems that support weak symbols the following implementation 132 // of ompt_start_tool() will be used in case no tool-supplied implementation of 133 // this function is present in the address space of a process. 134 135 _OMP_EXTERN OMPT_WEAK_ATTRIBUTE ompt_start_tool_result_t * 136 ompt_start_tool(unsigned int omp_version, const char *runtime_version) { 137 ompt_start_tool_result_t *ret = NULL; 138 // Search next symbol in the current address space. This can happen if the 139 // runtime library is linked before the tool. Since glibc 2.2 strong symbols 140 // don't override weak symbols that have been found before unless the user 141 // sets the environment variable LD_DYNAMIC_WEAK. 142 ompt_start_tool_t next_tool = 143 (ompt_start_tool_t)dlsym(RTLD_NEXT, "ompt_start_tool"); 144 if (next_tool) { 145 ret = next_tool(omp_version, runtime_version); 146 } 147 return ret; 148 } 149 150 #elif OMPT_HAVE_PSAPI 151 152 // On Windows, the ompt_tool_windows function is used to find the 153 // ompt_start_tool symbol across all modules loaded by a process. If 154 // ompt_start_tool is found, ompt_start_tool's return value is used to 155 // initialize the tool. Otherwise, NULL is returned and OMPT won't be enabled. 156 157 #include <psapi.h> 158 #pragma comment(lib, "psapi.lib") 159 160 // The number of loaded modules to start enumeration with EnumProcessModules() 161 #define NUM_MODULES 128 162 163 static ompt_start_tool_result_t * 164 ompt_tool_windows(unsigned int omp_version, const char *runtime_version) { 165 int i; 166 DWORD needed, new_size; 167 HMODULE *modules; 168 HANDLE process = GetCurrentProcess(); 169 modules = (HMODULE *)malloc(NUM_MODULES * sizeof(HMODULE)); 170 ompt_start_tool_t ompt_tool_p = NULL; 171 172 #if OMPT_DEBUG 173 printf("ompt_tool_windows(): looking for ompt_start_tool\n"); 174 #endif 175 if (!EnumProcessModules(process, modules, NUM_MODULES * sizeof(HMODULE), 176 &needed)) { 177 // Regardless of the error reason use the stub initialization function 178 free(modules); 179 return NULL; 180 } 181 // Check if NUM_MODULES is enough to list all modules 182 new_size = needed / sizeof(HMODULE); 183 if (new_size > NUM_MODULES) { 184 #if OMPT_DEBUG 185 printf("ompt_tool_windows(): resize buffer to %d bytes\n", needed); 186 #endif 187 modules = (HMODULE *)realloc(modules, needed); 188 // If resizing failed use the stub function. 189 if (!EnumProcessModules(process, modules, needed, &needed)) { 190 free(modules); 191 return NULL; 192 } 193 } 194 for (i = 0; i < new_size; ++i) { 195 (FARPROC &)ompt_tool_p = GetProcAddress(modules[i], "ompt_start_tool"); 196 if (ompt_tool_p) { 197 #if OMPT_DEBUG 198 TCHAR modName[MAX_PATH]; 199 if (GetModuleFileName(modules[i], modName, MAX_PATH)) 200 printf("ompt_tool_windows(): ompt_start_tool found in module %s\n", 201 modName); 202 #endif 203 free(modules); 204 return (*ompt_tool_p)(omp_version, runtime_version); 205 } 206 #if OMPT_DEBUG 207 else { 208 TCHAR modName[MAX_PATH]; 209 if (GetModuleFileName(modules[i], modName, MAX_PATH)) 210 printf("ompt_tool_windows(): ompt_start_tool not found in module %s\n", 211 modName); 212 } 213 #endif 214 } 215 free(modules); 216 return NULL; 217 } 218 #else 219 #error Activation of OMPT is not supported on this platform. 220 #endif 221 222 static ompt_start_tool_result_t * 223 ompt_try_start_tool(unsigned int omp_version, const char *runtime_version) { 224 ompt_start_tool_result_t *ret = NULL; 225 ompt_start_tool_t start_tool = NULL; 226 #if KMP_OS_WINDOWS 227 // Cannot use colon to describe a list of absolute paths on Windows 228 const char *sep = ";"; 229 #else 230 const char *sep = ":"; 231 #endif 232 233 #if KMP_OS_DARWIN 234 // Try in the current address space 235 ret = ompt_tool_darwin(omp_version, runtime_version); 236 #elif OMPT_HAVE_WEAK_ATTRIBUTE 237 ret = ompt_start_tool(omp_version, runtime_version); 238 #elif OMPT_HAVE_PSAPI 239 ret = ompt_tool_windows(omp_version, runtime_version); 240 #else 241 #error Activation of OMPT is not supported on this platform. 242 #endif 243 if (ret) 244 return ret; 245 246 // Try tool-libraries-var ICV 247 const char *tool_libs = getenv("OMP_TOOL_LIBRARIES"); 248 if (tool_libs) { 249 char *libs = __kmp_str_format("%s", tool_libs); 250 char *buf; 251 char *fname = __kmp_str_token(libs, sep, &buf); 252 while (fname) { 253 #if KMP_OS_UNIX 254 void *h = dlopen(fname, RTLD_LAZY); 255 if (h) { 256 start_tool = (ompt_start_tool_t)dlsym(h, "ompt_start_tool"); 257 #elif KMP_OS_WINDOWS 258 HMODULE h = LoadLibrary(fname); 259 if (h) { 260 start_tool = (ompt_start_tool_t)GetProcAddress(h, "ompt_start_tool"); 261 #else 262 #error Activation of OMPT is not supported on this platform. 263 #endif 264 if (start_tool && (ret = (*start_tool)(omp_version, runtime_version))) 265 break; 266 } 267 fname = __kmp_str_token(NULL, sep, &buf); 268 } 269 __kmp_str_free(&libs); 270 } 271 return ret; 272 } 273 274 void ompt_pre_init() { 275 //-------------------------------------------------- 276 // Execute the pre-initialization logic only once. 277 //-------------------------------------------------- 278 static int ompt_pre_initialized = 0; 279 280 if (ompt_pre_initialized) 281 return; 282 283 ompt_pre_initialized = 1; 284 285 //-------------------------------------------------- 286 // Use a tool iff a tool is enabled and available. 287 //-------------------------------------------------- 288 const char *ompt_env_var = getenv("OMP_TOOL"); 289 tool_setting_e tool_setting = omp_tool_error; 290 291 if (!ompt_env_var || !strcmp(ompt_env_var, "")) 292 tool_setting = omp_tool_unset; 293 else if (OMPT_STR_MATCH(ompt_env_var, "disabled")) 294 tool_setting = omp_tool_disabled; 295 else if (OMPT_STR_MATCH(ompt_env_var, "enabled")) 296 tool_setting = omp_tool_enabled; 297 298 #if OMPT_DEBUG 299 printf("ompt_pre_init(): tool_setting = %d\n", tool_setting); 300 #endif 301 switch (tool_setting) { 302 case omp_tool_disabled: 303 break; 304 305 case omp_tool_unset: 306 case omp_tool_enabled: 307 308 //-------------------------------------------------- 309 // Load tool iff specified in environment variable 310 //-------------------------------------------------- 311 ompt_start_tool_result = 312 ompt_try_start_tool(__kmp_openmp_version, ompt_get_runtime_version()); 313 314 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 315 break; 316 317 case omp_tool_error: 318 fprintf(stderr, "Warning: OMP_TOOL has invalid value \"%s\".\n" 319 " legal values are (NULL,\"\",\"disabled\"," 320 "\"enabled\").\n", 321 ompt_env_var); 322 break; 323 } 324 #if OMPT_DEBUG 325 printf("ompt_pre_init(): ompt_enabled = %d\n", ompt_enabled); 326 #endif 327 } 328 329 extern "C" int omp_get_initial_device(void); 330 331 void ompt_post_init() { 332 //-------------------------------------------------- 333 // Execute the post-initialization logic only once. 334 //-------------------------------------------------- 335 static int ompt_post_initialized = 0; 336 337 if (ompt_post_initialized) 338 return; 339 340 ompt_post_initialized = 1; 341 342 //-------------------------------------------------- 343 // Initialize the tool if so indicated. 344 //-------------------------------------------------- 345 if (ompt_start_tool_result) { 346 ompt_enabled.enabled = !!ompt_start_tool_result->initialize( 347 ompt_fn_lookup, omp_get_initial_device(), &(ompt_start_tool_result->tool_data)); 348 349 if (!ompt_enabled.enabled) { 350 // tool not enabled, zero out the bitmap, and done 351 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 352 return; 353 } 354 355 kmp_info_t *root_thread = ompt_get_thread(); 356 357 ompt_set_thread_state(root_thread, ompt_state_overhead); 358 359 if (ompt_enabled.ompt_callback_thread_begin) { 360 ompt_callbacks.ompt_callback(ompt_callback_thread_begin)( 361 ompt_thread_initial, __ompt_get_thread_data_internal()); 362 } 363 ompt_data_t *task_data; 364 ompt_data_t *parallel_data; 365 __ompt_get_task_info_internal(0, NULL, &task_data, NULL, ¶llel_data, NULL); 366 if (ompt_enabled.ompt_callback_implicit_task) { 367 ompt_callbacks.ompt_callback(ompt_callback_implicit_task)( 368 ompt_scope_begin, parallel_data, task_data, 1, 1, ompt_task_initial); 369 } 370 371 ompt_set_thread_state(root_thread, ompt_state_work_serial); 372 } 373 } 374 375 void ompt_fini() { 376 if (ompt_enabled.enabled) { 377 ompt_start_tool_result->finalize(&(ompt_start_tool_result->tool_data)); 378 } 379 380 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 381 } 382 383 /***************************************************************************** 384 * interface operations 385 ****************************************************************************/ 386 387 /***************************************************************************** 388 * state 389 ****************************************************************************/ 390 391 OMPT_API_ROUTINE int ompt_enumerate_states(int current_state, int *next_state, 392 const char **next_state_name) { 393 const static int len = sizeof(ompt_state_info) / sizeof(ompt_state_info_t); 394 int i = 0; 395 396 for (i = 0; i < len - 1; i++) { 397 if (ompt_state_info[i].state_id == current_state) { 398 *next_state = ompt_state_info[i + 1].state_id; 399 *next_state_name = ompt_state_info[i + 1].state_name; 400 return 1; 401 } 402 } 403 404 return 0; 405 } 406 407 OMPT_API_ROUTINE int ompt_enumerate_mutex_impls(int current_impl, 408 int *next_impl, 409 const char **next_impl_name) { 410 const static int len = 411 sizeof(kmp_mutex_impl_info) / sizeof(kmp_mutex_impl_info_t); 412 int i = 0; 413 for (i = 0; i < len - 1; i++) { 414 if (kmp_mutex_impl_info[i].id != current_impl) 415 continue; 416 *next_impl = kmp_mutex_impl_info[i + 1].id; 417 *next_impl_name = kmp_mutex_impl_info[i + 1].name; 418 return 1; 419 } 420 return 0; 421 } 422 423 /***************************************************************************** 424 * callbacks 425 ****************************************************************************/ 426 427 OMPT_API_ROUTINE ompt_set_result_t ompt_set_callback(ompt_callbacks_t which, 428 ompt_callback_t callback) { 429 switch (which) { 430 431 #define ompt_event_macro(event_name, callback_type, event_id) \ 432 case event_name: \ 433 ompt_callbacks.ompt_callback(event_name) = (callback_type)callback; \ 434 ompt_enabled.event_name = (callback != 0); \ 435 if (callback) \ 436 return ompt_event_implementation_status(event_name); \ 437 else \ 438 return ompt_set_always; 439 440 FOREACH_OMPT_EVENT(ompt_event_macro) 441 442 #undef ompt_event_macro 443 444 default: 445 return ompt_set_error; 446 } 447 } 448 449 OMPT_API_ROUTINE int ompt_get_callback(ompt_callbacks_t which, 450 ompt_callback_t *callback) { 451 if (!ompt_enabled.enabled) 452 return ompt_get_callback_failure; 453 454 switch (which) { 455 456 #define ompt_event_macro(event_name, callback_type, event_id) \ 457 case event_name: { \ 458 ompt_callback_t mycb = \ 459 (ompt_callback_t)ompt_callbacks.ompt_callback(event_name); \ 460 if (ompt_enabled.event_name && mycb) { \ 461 *callback = mycb; \ 462 return ompt_get_callback_success; \ 463 } \ 464 return ompt_get_callback_failure; \ 465 } 466 467 FOREACH_OMPT_EVENT(ompt_event_macro) 468 469 #undef ompt_event_macro 470 471 default: 472 return ompt_get_callback_failure; 473 } 474 } 475 476 /***************************************************************************** 477 * parallel regions 478 ****************************************************************************/ 479 480 OMPT_API_ROUTINE int ompt_get_parallel_info(int ancestor_level, 481 ompt_data_t **parallel_data, 482 int *team_size) { 483 if (!ompt_enabled.enabled) 484 return 0; 485 return __ompt_get_parallel_info_internal(ancestor_level, parallel_data, 486 team_size); 487 } 488 489 OMPT_API_ROUTINE int ompt_get_state(ompt_wait_id_t *wait_id) { 490 if (!ompt_enabled.enabled) 491 return ompt_state_work_serial; 492 int thread_state = __ompt_get_state_internal(wait_id); 493 494 if (thread_state == ompt_state_undefined) { 495 thread_state = ompt_state_work_serial; 496 } 497 498 return thread_state; 499 } 500 501 /***************************************************************************** 502 * tasks 503 ****************************************************************************/ 504 505 OMPT_API_ROUTINE ompt_data_t *ompt_get_thread_data(void) { 506 if (!ompt_enabled.enabled) 507 return NULL; 508 return __ompt_get_thread_data_internal(); 509 } 510 511 OMPT_API_ROUTINE int ompt_get_task_info(int ancestor_level, int *type, 512 ompt_data_t **task_data, 513 ompt_frame_t **task_frame, 514 ompt_data_t **parallel_data, 515 int *thread_num) { 516 if (!ompt_enabled.enabled) 517 return 0; 518 return __ompt_get_task_info_internal(ancestor_level, type, task_data, 519 task_frame, parallel_data, thread_num); 520 } 521 522 OMPT_API_ROUTINE int ompt_get_task_memory(void **addr, size_t *size, 523 int block) { 524 return __ompt_get_task_memory_internal(addr, size, block); 525 } 526 527 /***************************************************************************** 528 * num_procs 529 ****************************************************************************/ 530 531 OMPT_API_ROUTINE int ompt_get_num_procs(void) { 532 // copied from kmp_ftn_entry.h (but modified: OMPT can only be called when 533 // runtime is initialized) 534 return __kmp_avail_proc; 535 } 536 537 /***************************************************************************** 538 * places 539 ****************************************************************************/ 540 541 OMPT_API_ROUTINE int ompt_get_num_places(void) { 542 // copied from kmp_ftn_entry.h (but modified) 543 #if !KMP_AFFINITY_SUPPORTED 544 return 0; 545 #else 546 if (!KMP_AFFINITY_CAPABLE()) 547 return 0; 548 return __kmp_affinity_num_masks; 549 #endif 550 } 551 552 OMPT_API_ROUTINE int ompt_get_place_proc_ids(int place_num, int ids_size, 553 int *ids) { 554 // copied from kmp_ftn_entry.h (but modified) 555 #if !KMP_AFFINITY_SUPPORTED 556 return 0; 557 #else 558 int i, count; 559 int tmp_ids[ids_size]; 560 if (!KMP_AFFINITY_CAPABLE()) 561 return 0; 562 if (place_num < 0 || place_num >= (int)__kmp_affinity_num_masks) 563 return 0; 564 /* TODO: Is this safe for asynchronous call from signal handler during runtime 565 * shutdown? */ 566 kmp_affin_mask_t *mask = KMP_CPU_INDEX(__kmp_affinity_masks, place_num); 567 count = 0; 568 KMP_CPU_SET_ITERATE(i, mask) { 569 if ((!KMP_CPU_ISSET(i, __kmp_affin_fullMask)) || 570 (!KMP_CPU_ISSET(i, mask))) { 571 continue; 572 } 573 if (count < ids_size) 574 tmp_ids[count] = i; 575 count++; 576 } 577 if (ids_size >= count) { 578 for (i = 0; i < count; i++) { 579 ids[i] = tmp_ids[i]; 580 } 581 } 582 return count; 583 #endif 584 } 585 586 OMPT_API_ROUTINE int ompt_get_place_num(void) { 587 // copied from kmp_ftn_entry.h (but modified) 588 #if !KMP_AFFINITY_SUPPORTED 589 return -1; 590 #else 591 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 592 return -1; 593 594 int gtid; 595 kmp_info_t *thread; 596 if (!KMP_AFFINITY_CAPABLE()) 597 return -1; 598 gtid = __kmp_entry_gtid(); 599 thread = __kmp_thread_from_gtid(gtid); 600 if (thread == NULL || thread->th.th_current_place < 0) 601 return -1; 602 return thread->th.th_current_place; 603 #endif 604 } 605 606 OMPT_API_ROUTINE int ompt_get_partition_place_nums(int place_nums_size, 607 int *place_nums) { 608 // copied from kmp_ftn_entry.h (but modified) 609 #if !KMP_AFFINITY_SUPPORTED 610 return 0; 611 #else 612 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 613 return 0; 614 615 int i, gtid, place_num, first_place, last_place, start, end; 616 kmp_info_t *thread; 617 if (!KMP_AFFINITY_CAPABLE()) 618 return 0; 619 gtid = __kmp_entry_gtid(); 620 thread = __kmp_thread_from_gtid(gtid); 621 if (thread == NULL) 622 return 0; 623 first_place = thread->th.th_first_place; 624 last_place = thread->th.th_last_place; 625 if (first_place < 0 || last_place < 0) 626 return 0; 627 if (first_place <= last_place) { 628 start = first_place; 629 end = last_place; 630 } else { 631 start = last_place; 632 end = first_place; 633 } 634 if (end - start <= place_nums_size) 635 for (i = 0, place_num = start; place_num <= end; ++place_num, ++i) { 636 place_nums[i] = place_num; 637 } 638 return end - start + 1; 639 #endif 640 } 641 642 /***************************************************************************** 643 * places 644 ****************************************************************************/ 645 646 OMPT_API_ROUTINE int ompt_get_proc_id(void) { 647 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 648 return -1; 649 #if KMP_OS_LINUX 650 return sched_getcpu(); 651 #elif KMP_OS_WINDOWS 652 PROCESSOR_NUMBER pn; 653 GetCurrentProcessorNumberEx(&pn); 654 return 64 * pn.Group + pn.Number; 655 #else 656 return -1; 657 #endif 658 } 659 660 /***************************************************************************** 661 * compatability 662 ****************************************************************************/ 663 664 /* 665 * Currently unused function 666 OMPT_API_ROUTINE int ompt_get_ompt_version() { return OMPT_VERSION; } 667 */ 668 669 /***************************************************************************** 670 * application-facing API 671 ****************************************************************************/ 672 673 /*---------------------------------------------------------------------------- 674 | control 675 ---------------------------------------------------------------------------*/ 676 677 int __kmp_control_tool(uint64_t command, uint64_t modifier, void *arg) { 678 679 if (ompt_enabled.enabled) { 680 if (ompt_enabled.ompt_callback_control_tool) { 681 return ompt_callbacks.ompt_callback(ompt_callback_control_tool)( 682 command, modifier, arg, OMPT_LOAD_RETURN_ADDRESS(__kmp_entry_gtid())); 683 } else { 684 return -1; 685 } 686 } else { 687 return -2; 688 } 689 } 690 691 /***************************************************************************** 692 * misc 693 ****************************************************************************/ 694 695 OMPT_API_ROUTINE uint64_t ompt_get_unique_id(void) { 696 return __ompt_get_unique_id_internal(); 697 } 698 699 OMPT_API_ROUTINE void ompt_finalize_tool(void) { __kmp_internal_end_atexit(); } 700 701 /***************************************************************************** 702 * Target 703 ****************************************************************************/ 704 705 OMPT_API_ROUTINE int ompt_get_target_info(uint64_t *device_num, 706 ompt_id_t *target_id, 707 ompt_id_t *host_op_id) { 708 return 0; // thread is not in a target region 709 } 710 711 OMPT_API_ROUTINE int ompt_get_num_devices(void) { 712 return 1; // only one device (the current device) is available 713 } 714 715 /***************************************************************************** 716 * API inquiry for tool 717 ****************************************************************************/ 718 719 static ompt_interface_fn_t ompt_fn_lookup(const char *s) { 720 721 #define ompt_interface_fn(fn) \ 722 fn##_t fn##_f = fn; \ 723 if (strcmp(s, #fn) == 0) \ 724 return (ompt_interface_fn_t)fn##_f; 725 726 FOREACH_OMPT_INQUIRY_FN(ompt_interface_fn) 727 728 return (ompt_interface_fn_t)0; 729 } 730