On both
gcc (GCC) 3.3.5 (propolice)
and
gcc.exe (GCC) 3.4.2 (mingw-special)
the following code does not work properly.
Its output should be test1<nl>test2<nl>test3<nl>, but the 3rd output gets
malformed.
It seems to me the stack is unwindded too far by sjlj-eh at the entrance of
catch block and the region obtained by alloca() is destroyed.
<test.cpp>---------------
#include "malloc.h"
#include "string.h"
#include "stdio.h"
static void foo2();
int main(int, char**)
{
int a=0;
a=a+1;
char *b=(char *)alloca(10);
strcpy(b,"test");
printf("%s%d\n", b, a);
try {
a++;
printf("%s%d\n", b, a);
foo2();
}
catch(...){
a++;
printf("%s%d\n", b, a);
}
return 0;
}
static void foo2()
{
int i=1;
throw(i);
}
--
Summary: SJLJ exception handling fails in function using alloca()
Product: gcc
Version: 3.4.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: t_ono at hkfreak dot net
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25266
