[EDG C++ 3.9] definition of jmp_buf causes buffer overflow
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Key: STDCXX-989
URL: https://issues.apache.org/jira/browse/STDCXX-989
Project: C++ Standard Library
Issue Type: Bug
Components: 18. Language Support
Affects Versions: 4.2.x
Environment: Linux/EDG C++ 3.9
Reporter: Travis Vitek
Fix For: 4.2.x
The {{jmp_buf}} definition provided in {{include/ansi/_csetjmp.h}} is not as
large as {{setjmp()}} is expecting. This causes a buffer overflow when running
tests that use the test driver ({{rw_test}}), which results in data corruption.
If you run the tests with {{--trace}}, you will see that the _clause_ field of
the output is always corrupt after the first use.
The following shows the expected size for us...
{noformat}
$ cat u.cpp; eccp u.cpp && ./a.out
#include <setjmp.h>
#include <stdio.h>
int main ()
{
printf ("%u\n", sizeof (jmp_buf));
return 0;
}
156
{noformat}
The definition of {{jmp_buf}} in {{include/rw/_csetjmp.h}} is a buffer of 8
bytes.
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