backtrace.c revision 50bc12afba900c478d5d760966ef5b6f32229c99
114e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm/* libunwind - a platform-independent unwind library 214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm Copyright (C) 2001-2002 Hewlett-Packard Co 314e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm Contributed by David Mosberger-Tang <davidm@hpl.hp.com> 414e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 514e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmThis file is part of libunwind. 614e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 714e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmPermission is hereby granted, free of charge, to any person obtaining 814e36a6a516875be61e02206c81c08a8750f340fhp.com!davidma copy of this software and associated documentation files (the 914e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm"Software"), to deal in the Software without restriction, including 1014e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmwithout limitation the rights to use, copy, modify, merge, publish, 1114e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmdistribute, sublicense, and/or sell copies of the Software, and to 1214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmpermit persons to whom the Software is furnished to do so, subject to 1314e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmthe following conditions: 1414e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 1514e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmThe above copyright notice and this permission notice shall be 1614e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmincluded in all copies or substantial portions of the Software. 1714e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 1814e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 1914e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 2014e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 2114e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 2214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 2314e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 2414e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 2514e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 2614e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm#ifndef UNW_REMOTE_ONLY 273eabce18b1e70c3b26975024e450977dfb4b84b9Konstantin Belousov 28093855f12a00d4eacf548db6095235f970f88305Konstantin Belousov#define UNW_LOCAL_ONLY 2914e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm#include <libunwind.h> 302f9b04e9c29999d18906e37b37dcea9676df194fArun Sharma#include <libunwind_i.h> 3144a14d1364abff3dc7ec49f35b7220542c4cf2b1Lassi Tuura#include <string.h> 3214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 3314e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm/* See glibc manual for a description of this function. */ 3414e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 352f9b04e9c29999d18906e37b37dcea9676df194fArun Sharmastatic ALWAYS_INLINE int 367ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharmaslow_backtrace (void **buffer, int size) 377ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma{ 387ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma unw_cursor_t cursor; 397ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma unw_context_t uc; 407ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma unw_word_t ip; 417ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma int n = 0; 427ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma 437ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma unw_getcontext (&uc); 447ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma if (unw_init_local (&cursor, &uc) < 0) 457ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return 0; 467ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma 477ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma while (unw_step (&cursor) > 0) 487ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma { 497ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma if (n >= size) 507ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return n; 517ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma 527ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma if (unw_get_reg (&cursor, UNW_REG_IP, &ip) < 0) 537ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return n; 547ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma buffer[n++] = (void *) (uintptr_t) ip; 557ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma } 567ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return n; 577ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma} 587ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma 5914e36a6a516875be61e02206c81c08a8750f340fhp.com!davidmint 6050bc12afba900c478d5d760966ef5b6f32229c99Lassi Tuuraunw_backtrace (void **buffer, int size) 6114e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm{ 6214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm unw_cursor_t cursor; 637ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma unw_context_t uc; 6444a14d1364abff3dc7ec49f35b7220542c4cf2b1Lassi Tuura int n = size; 657ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma int ret; 6614e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 6714e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm unw_getcontext (&uc); 6844a14d1364abff3dc7ec49f35b7220542c4cf2b1Lassi Tuura 6914e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm if (unw_init_local (&cursor, &uc) < 0) 7014e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm return 0; 7114e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 727ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma /* We don't need backtrace() to show up in buffer */ 737ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma ret = unw_step (&cursor); 747ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma if (ret < 0) 757ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return ret; 767ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma 7744a14d1364abff3dc7ec49f35b7220542c4cf2b1Lassi Tuura if (unw_tdep_trace (&cursor, buffer, &n) < 0) 7814e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm { 797ff83c051e33de1adbcbc20bf63ea368c2745a70Arun Sharma return slow_backtrace(buffer, size); 8014e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm } 8144a14d1364abff3dc7ec49f35b7220542c4cf2b1Lassi Tuura 8214e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm return n; 8314e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm} 8414e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm 8550bc12afba900c478d5d760966ef5b6f32229c99Lassi Tuuraextern int backtrace (void **buffer, int size) 8650bc12afba900c478d5d760966ef5b6f32229c99Lassi Tuura __attribute__((weak, alias("unw_backtrace"))); 8750bc12afba900c478d5d760966ef5b6f32229c99Lassi Tuura 8814e36a6a516875be61e02206c81c08a8750f340fhp.com!davidm#endif /* !UNW_REMOTE_ONLY */ 89