File indexing completed on 2024-05-12 17:15:55

 /*
     SPDX-FileCopyrightText: 2019 Volodymyr Nikolaichuk <nikolaychuk.volodymyr@gmail.com>
 
     SPDX-License-Identifier: LGPL-2.1-or-later
 */
 
 /**
  * @brief A unwind-tables based backtrace.
  */
 
 #include "trace.h"
 
 #include <cstdint>
 #include <cstdio>
 #include <unwind.h>
 
 namespace {
 
 struct backtrace
 {
     void** data = nullptr;
     int ctr = 0;
     int max_size = 0;
 };
 
 _Unwind_Reason_Code unwind_backtrace_callback(struct _Unwind_Context* context, void* arg)
 {
     backtrace* trace = static_cast<backtrace*>(arg);
 
     uintptr_t pc = _Unwind_GetIP(context);
     if (pc && trace->ctr < trace->max_size - 1) {
         trace->data[trace->ctr++] = (void*)(pc);
     }
 
     return _URC_NO_REASON;
 }
 
 }
 
 void Trace::setup()
 {
 }
 
 void Trace::print()
 {
     Trace trace;
     trace.fill(1);
     for (auto ip : trace) {
         fprintf(stderr, "%p\n", ip);
     }
 }
 
 int Trace::unwind(void** data)
 {
     backtrace trace;
     trace.data = data;
     trace.max_size = MAX_SIZE;
 
     _Unwind_Backtrace(unwind_backtrace_callback, &trace);
     return trace.ctr;
 }