Jonathan R. Madsen
8f36620e29
- More to come in later commit, below is just tidying some stuff up
- clang-tidy
- mpi_gotcha quiet about not finding funcs
- update to new papi config
- sampling block_samples / unblock_samples
- disable calling component's sample functions within sampler
- release doesn't strip library
- remove HSA and ROCP env variables from modulefile / setup-env
- preliminary support for LD_PRELOAD usage
- default sampling rate is 300 interrupts / second
- fixes various deadlock issues at startup
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
// MIT License
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//
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// Copyright (c) 2022 Advanced Micro Devices, Inc. All Rights Reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#define _GNU_SOURCE
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#include <dlfcn.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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extern void
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omnitrace_finalize(void);
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extern void
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omnitrace_push_trace(const char* name);
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extern void
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omnitrace_pop_trace(const char* name);
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// extern void
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// omnitrace_update_env(char*** envp);
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extern void
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omnitrace_init_tooling(void);
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extern void
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omnitrace_init(const char*, bool, const char*);
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// Trampoline for the real main()
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static int (*main_real)(int, char**, char**);
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int
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omnitrace_main(int argc, char** argv, char** envp)
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{
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// prevent re-entry
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static int _reentry = 0;
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if(_reentry > 0) return -1;
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_reentry = 1;
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// set the relevant environment variables
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// omnitrace_update_env(&envp);
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const char* mode = getenv("OMNITRACE_MODE");
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omnitrace_init(mode ? mode : "sampling", false, argv[0]);
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omnitrace_init_tooling();
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omnitrace_push_trace("main(int argc, char** argv)");
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int ret = main_real(argc, argv, envp);
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omnitrace_pop_trace("main(int argc, char** argv)");
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omnitrace_finalize();
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return ret;
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}
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typedef int
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(*omnitrace_libc_start_main)(int (*)(int, char**, char**), int, char**,
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int (*)(int, char**, char**), void (*)(void),
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void (*)(void), void*);
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int
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__libc_start_main(int (*_main)(int, char**, char**), int _argc, char** _argv,
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int (*_init)(int, char**, char**), void (*_fini)(void),
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void (*_rtld_fini)(void), void* _stack_end)
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{
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// prevent re-entry
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static int _reentry = 0;
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if(_reentry > 0) return -1;
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_reentry = 1;
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// get the address of this function
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void* _this_func = __builtin_return_address(0);
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// Save the real main function address
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main_real = _main;
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// Find the real __libc_start_main()
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omnitrace_libc_start_main user_main = dlsym(RTLD_NEXT, "__libc_start_main");
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if(user_main && user_main != _this_func)
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{
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//if(strcmp(_argv[0], "mpirun") == 0)
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// return user_main(_main, _argc, _argv, _init, _fini, _rtld_fini,
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// _stack_end);
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//else
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// call omnitrace main function wrapper
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return user_main(omnitrace_main, _argc, _argv, _init, _fini, _rtld_fini, _stack_end);
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}
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else
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{
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fputs("Error! omnitrace could not find __libc_start_main!", stderr);
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return -1;
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}
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}
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