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Exception handling across dll?
- From: Yi-An Huang <yian at cc dot gatech dot edu>
- To: cygwin at cygwin dot com
- Date: Sun, 31 Mar 2002 13:34:26 -0500 (EST)
- Subject: Exception handling across dll?
Does the shared library linking currently handle C++ exception handling
across dll properly? I have a sample program which tries to throw some
exception in dll and catch it in main program, which fails. If I use
static linking, it works.
The program uses autoxxx/libtool and is heavily borrowed from dllhelper
examples. My environment is cygwin 1.3.10 on 2K.
$ usedll
Aborted(core dumped)
****lt-usedll.exe.stackdump****
Stack trace:
Frame Function Args
0022F6D4 61058105 (000004F8, 00000006, 00000001, 00000103)
0022F714 61058342 (000004F8, 00000006, 0022F774, 61058789)
0022F734 610581CA (00000006, 00000000, 0022F774, 61058754)
0022F774 6105879F (00235678, 77F82207, 0022F794, 1000104D)
0022F784 1000103F (77F82933, 00230000, 0022FE04, 1000125F)
0022F794 1000104D (00000004, 610A0368, 00000001, 77FB9DA7)
0022FE04 1000125F (10001000, 100071C4, 00000000, 004011FD)
0022FE24 1000102C (00000004, 610A0368, 00000001, 000000F4)
0022FEB4 0040108D (00000001, 6156C8A8, 10030278, 00000000)
0022FF10 61003F42 (00000000, 00000000, 00000000, 02000000)
0022FF40 61004236 (0040104C, 00000000, FF7CA020, 8104261C)
0022FF60 61004275 (00000000, 00000000, FF7CA1B0, 00000005)
0022FF90 004049A7 (0040104C, FFFFFFFF, 80430D77, 00000000)
0022FFC0 0040103D (00000000, 00000000, 7FFDF000, 00000000)
0022FFF0 77E8D326 (00401000, 00000000, 000000C8, 00000100)
End of stack trace
****Makefile.am****
pkginclude_HEADERS = cdll.h
lib_LTLIBRARIES = libcdll.la
libcdll_la_SOURCES = cdll.cpp
libcdll_la_LDFLAGS = -version-info 1:0:1 -no-undefined
bin_PROGRAMS = usedll
usedll_SOURCES = usedll.cpp
usedll_LDADD = libcdll.la
****configure.ac****
AC_INIT(cdll.cpp)
AC_PREREQ(2.52)
AM_INIT_AUTOMAKE(dllcpp, 0.1.0)
AC_PROG_CXX
AM_PROG_LIBTOOL
AC_HEADER_STDC
AC_OUTPUT([Makefile])
****cdll.cpp****
#include "cdll.h"
void dll_func() {
throw "Exception";
}
****cdll.h****
#ifndef cdll_h_included
#define cdll_h_included
extern void dll_func () ;
#endif /* cdll_h_included */
****usedll.cpp****
#include <stdio.h>
#include "cdll.h"
int main () {
try {
dll_func();
} catch(...) {
printf("Caught\n");
}
}
-Willis
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