assert.cpp

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#define _RWSTD_LIB_SRC
 
 
#include <stdio.h>    // for fprintf()
#include <stdlib.h>   // for abort()
 
#include <rw/_defs.h>
 
 
#ifdef __HP_aCC
 
extern "C" void U_STACK_TRACE () _RWSTD_DECLARE_NOTHROW;
 
#  define STACK_TRACE   U_STACK_TRACE
 
#elif defined (__GLIBC__)
 
#  include <execinfo.h>
 
_RWSTD_NAMESPACE (__rw) {
 
// declare with attribute((nothrow)) since the function calls
// others that may not be declared nothrow
static void
__rw_stack_trace (int fd) _RWSTD_DECLARE_NOTHROW;
 
 
static void
__rw_stack_trace (int fd) _RWSTD_DEFINE_NOTHROW
{
    // limit stacktrace to the depth of 256 calls
    void* array [256];
 
    const int size = backtrace (array, int (sizeof array / sizeof *array));
 
    backtrace_symbols_fd (array, size, fd);
}
 
}   // namespace __rw
 
#  define STACK_TRACE()   _RW::__rw_stack_trace (2)
 
#elif    defined (_RWSTD_OS_SUNOS) \
      && (5 < _RWSTD_OS_MAJOR || 5 == _RWSTD_OS_MAJOR && 8 < _RWSTD_OS_MINOR)
 
// only Solaris 9 and better defines printstack() (in <ucontext.h>)
// declare the function here instead of including the header to avoid
// having to #define enabling macros (i.e., __EXTENSIONS__) and deal
// with the breakage when using a strict compiler such as EDG eccp
// with the long long extension (used in some system headers) disabled
extern "C" int printstack (int) _RWSTD_DECLARE_NOTHROW;
 
#    define STACK_TRACE()   printstack (2)
#endif
 
#ifndef STACK_TRACE
#  define STACK_TRACE()   (void)0
#endif   // __HP_aCC
 
 
_RWSTD_NAMESPACE (__rw) { 
 
 
_RWSTD_EXPORT void
__rw_assert_fail (const char *expr,
                  const char *file, int line, const char *func)
     _RWSTD_DEFINE_NOTHROW
{
    // func may be 0 if the compiler doesn't support the ANSI C predefined
    // identifier `__func__' (see 6.4.2.2 of ISO/IEC 9899:1999) or an
    // equivalent thereof, such as gcc's __PRETTY_FUNCTION__
    if (func)
        fprintf (stderr, "%s:%d: %s: Assertion '%s' failed.\n",
                 file, line, func, expr);
    else
        fprintf (stderr, "%s:%d: Assertion '%s' failed.\n",
                 file, line, expr);
 
    // print stack trace (if available) before aborting
    STACK_TRACE ();
 
    abort ();
}
 
 
}   // namespace __rw