90a1720926
libunwind has an API to provide symbolic names for functions. It's less optimal than using backtrace_symbols() or libdw, as it doesn't allow deferring the symbolic names lookup, but it can be usefull as a fallback if no other option is available. A sample backtrace when falling back to libunwind looks like libcamera::VimcCameraData::init()+0xbd libcamera::PipelineHandlerVimc::match(libcamera::DeviceEnumerator*)+0x3e0 libcamera::CameraManager::Private::createPipelineHandlers()+0x1a7 libcamera::CameraManager::Private::init()+0x98 libcamera::CameraManager::Private::run()+0x9f libcamera::Thread::startThread()+0xee decltype(*(std::__1::forward<libcamera::Thread*>(fp0)).*fp()) std::__1::__invoke<void (libcamera::Thread::*)(), libcamera::Thread*, void>(void (libcamera::Thread::*&&)(), libcamera::Thread*&&)+0x77 void std::__1::__thread_execute<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (libcamera::Thread::*)(), libcamera::Thread*, 2ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (libcamera::Thread::*)(), libcamera::Thread*>&, std::__1::__tuple_indices<2ul>)+0x3e void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct> >, void (libcamera::Thread::*)(), libcamera::Thread*> >(void*)+0x62 start_thread+0xde ??? Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
39 lines
693 B
C++
39 lines
693 B
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2021, Ideas on Board Oy
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*
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* backtrace.h - Call stack backtraces
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*/
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#ifndef __LIBCAMERA_BASE_BACKTRACE_H__
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#define __LIBCAMERA_BASE_BACKTRACE_H__
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#include <string>
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#include <vector>
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#include <libcamera/base/private.h>
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#include <libcamera/base/class.h>
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namespace libcamera {
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class Backtrace
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{
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public:
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Backtrace();
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std::string toString(unsigned int skipLevels = 0) const;
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private:
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LIBCAMERA_DISABLE_COPY(Backtrace)
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bool backtraceTrace();
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bool unwindTrace();
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std::vector<void *> backtrace_;
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std::vector<std::string> backtraceText_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_BASE_BACKTRACE_H__ */
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