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0f990d0183
By default the flag is enabled whenever libunwind is found on the system, with the exception of static build on OSX (for which we can't install the throw hook #932 due to lack of support for --wrap in OSX ld64 linker).
138 lines
4.7 KiB
C++
138 lines
4.7 KiB
C++
// Copyright (c) 2016, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "common/stack_trace.h"
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#include "misc_log_ex.h"
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#define UNW_LOCAL_ONLY
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#include <libunwind.h>
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#include <cxxabi.h>
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#ifndef STATICLIB
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#include <dlfcn.h>
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#endif
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// from http://stackoverflow.com/questions/11665829/how-can-i-print-stack-trace-for-caught-exceptions-in-c-code-injection-in-c
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// The decl of __cxa_throw in /usr/include/.../cxxabi.h uses
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// 'std::type_info *', but GCC's built-in protype uses 'void *'.
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#ifdef __clang__
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#define CXA_THROW_INFO_T std::type_info
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#else // !__clang__
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#define CXA_THROW_INFO_T void
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#endif // !__clang__
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#ifdef STATICLIB
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#define CXA_THROW __wrap___cxa_throw
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extern "C"
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__attribute__((noreturn))
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void __real___cxa_throw(void *ex, CXA_THROW_INFO_T *info, void (*dest)(void*));
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#else // !STATICLIB
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#define CXA_THROW __cxa_throw
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extern "C"
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typedef
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#ifdef __clang__ // only clang, not GCC, lets apply the attr in typedef
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__attribute__((noreturn))
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#endif // __clang__
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void (cxa_throw_t)(void *ex, CXA_THROW_INFO_T *info, void (*dest)(void*));
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#endif // !STATICLIB
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extern "C"
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__attribute__((noreturn))
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void CXA_THROW(void *ex, CXA_THROW_INFO_T *info, void (*dest)(void*))
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{
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int status;
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char *dsym = abi::__cxa_demangle(((const std::type_info*)info)->name(), NULL, NULL, &status);
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tools::log_stack_trace((std::string("Exception: ")+((!status && dsym) ? dsym : (const char*)info)).c_str());
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free(dsym);
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#ifndef STATICLIB
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#ifndef __clang__ // for GCC the attr can't be applied in typedef like for clang
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__attribute__((noreturn))
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#endif // !__clang__
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cxa_throw_t *__real___cxa_throw = (cxa_throw_t*)dlsym(RTLD_NEXT, "__cxa_throw");
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#endif // !STATICLIB
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__real___cxa_throw(ex, info, dest);
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}
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namespace
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{
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std::string stack_trace_log;
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}
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namespace tools
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{
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void set_stack_trace_log(const std::string &log)
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{
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stack_trace_log = log;
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}
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void log_stack_trace(const char *msg)
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{
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unw_context_t ctx;
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unw_cursor_t cur;
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unw_word_t ip, off;
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unsigned level;
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char sym[512], *dsym;
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int status;
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const char *log = stack_trace_log.empty() ? NULL : stack_trace_log.c_str();
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if (msg)
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LOG_PRINT2(log, msg, LOG_LEVEL_0);
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LOG_PRINT2(log, "Unwinded call stack:", LOG_LEVEL_0);
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if (unw_getcontext(&ctx) < 0) {
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LOG_PRINT2(log, "Failed to create unwind context", LOG_LEVEL_0);
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return;
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}
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if (unw_init_local(&cur, &ctx) < 0) {
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LOG_PRINT2(log, "Failed to find the first unwind frame", LOG_LEVEL_0);
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return;
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}
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for (level = 1; level < 999; ++level) { // 999 for safety
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int ret = unw_step(&cur);
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if (ret < 0) {
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LOG_PRINT2(log, "Failed to find the next frame", LOG_LEVEL_0);
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return;
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}
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if (ret == 0)
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break;
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if (unw_get_reg(&cur, UNW_REG_IP, &ip) < 0) {
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LOG_PRINT2(log, " " << std::setw(4) << level, LOG_LEVEL_0);
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continue;
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}
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if (unw_get_proc_name(&cur, sym, sizeof(sym), &off) < 0) {
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LOG_PRINT2(log, " " << std::setw(4) << level << std::setbase(16) << std::setw(20) << "0x" << ip, LOG_LEVEL_0);
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continue;
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}
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dsym = abi::__cxa_demangle(sym, NULL, NULL, &status);
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LOG_PRINT2(log, " " << std::setw(4) << level << std::setbase(16) << std::setw(20) << "0x" << ip << " " << (!status && dsym ? dsym : sym) << " + " << "0x" << off, LOG_LEVEL_0);
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free(dsym);
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}
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}
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} // namespace tools
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