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5b5a1cb014
Add support for backtrace prints when BUG() is being called. To support backtrace calls, the -rdynamic compiler flag is now being used. On host, it fully works as expected, on target only exported symbols (in libnvgpu-drv.export) are visible. JIRA NVGPU-1246 Change-Id: Ia075ac99228e8377bdb3142fef2e56c2fea2d967 Signed-off-by: Nicolas Benech <nbenech@nvidia.com> Reviewed-on: https://git-master.nvidia.com/r/1943478 Reviewed-by: svc-misra-checker <svc-misra-checker@nvidia.com> Reviewed-by: Philip Elcan <pelcan@nvidia.com> GVS: Gerrit_Virtual_Submit Reviewed-by: Alex Waterman <alexw@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com> Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/*
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* Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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
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* all 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
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* THE 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <nvgpu/log.h>
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#include <nvgpu/posix/bug.h>
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#include <signal.h>
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#include <pthread.h>
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#include <stdbool.h>
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#include <setjmp.h>
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#ifndef _QNX_SOURCE
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#include <execinfo.h>
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#endif
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#define BACKTRACE_MAXSIZE 1024
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static _Thread_local bool expect_bug;
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static _Thread_local jmp_buf *jmp_handler;
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void bug_handler_register(jmp_buf *handler)
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{
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expect_bug = true;
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jmp_handler = handler;
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}
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void bug_handler_cancel(void)
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{
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expect_bug = false;
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jmp_handler = NULL;
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}
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static void __dump_stack(int skip_frames)
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{
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#ifndef _QNX_SOURCE
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void *trace[BACKTRACE_MAXSIZE];
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int i;
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int trace_size = backtrace(trace, BACKTRACE_MAXSIZE);
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char **trace_syms = backtrace_symbols(trace, trace_size);
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for (i = skip_frames; i < trace_size; i++) {
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nvgpu_err(NULL, "[%d] %s", i - skip_frames, trace_syms[i]);
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}
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#endif
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return;
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}
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void dump_stack(void)
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{
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/* Skip this function and __dump_stack() */
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__dump_stack(2);
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}
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/*
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* Ahhh! A bug!
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*/
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void __bug(const char *fmt, ...)
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{
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if (expect_bug) {
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nvgpu_info(NULL, "Expected BUG detected!");
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expect_bug = false;
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/* Perform a long jump to where "setjmp()" was called. */
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longjmp(*jmp_handler, 1);
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}
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/*
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* If BUG was unexpected, raise a SIGSEGV signal, dump the stack and
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* kill the thread.
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*/
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nvgpu_err(NULL, "BUG detected!");
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dump_stack();
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(void) raise(SIGSEGV);
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pthread_exit(NULL);
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}
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bool __warn(bool cond, const char *fmt, ...)
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{
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if (!cond)
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goto done;
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nvgpu_warn(NULL, "WARNING detected!");
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dump_stack();
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done:
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return cond;
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}
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