execinfo/debug.c

 
#include <assert.h>
#include <stdlib.h>
#include <fcntl.h>
 
#include <execinfo.h>
 
#include "debug.h"
 
typedef struct
{
  void** buffer;
  size_t max;
  size_t used;
} t_execinfo;
 
void winpr_execinfo_backtrace_free(void* buffer)
{
  t_execinfo* data = (t_execinfo*)buffer;
  if (!data)
    return;
 
  free((void*)data->buffer);
  free(data);
}
 
void* winpr_execinfo_backtrace(DWORD size)
{
  t_execinfo* data = calloc(1, sizeof(t_execinfo));
 
  if (!data)
    return NULL;
 
  data->buffer = (void**)calloc(size, sizeof(void*));
 
  if (!data->buffer)
  {
    free(data);
    return NULL;
  }
 
  assert(size <= INT32_MAX);
  const int rc = backtrace(data->buffer, (int)size);
  if (rc < 0)
  {
    free(data);
    return NULL;
  }
  data->max = size;
  data->used = (size_t)rc;
  return data;
}
 
char** winpr_execinfo_backtrace_symbols(void* buffer, size_t* used)
{
  t_execinfo* data = (t_execinfo*)buffer;
  if (used)
    *used = 0;
 
  if (!data)
    return NULL;
 
  if (used)
    *used = data->used;
 
  assert(data->used < INT32_MAX);
  return backtrace_symbols(data->buffer, (int)data->used);
}
 
void winpr_execinfo_backtrace_symbols_fd(void* buffer, int fd)
{
  t_execinfo* data = (t_execinfo*)buffer;
 
  if (!data)
    return;
 
  assert(data->used <= INT32_MAX);
  backtrace_symbols_fd(data->buffer, (int)data->used, fd);
}