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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Closed: (STDCXX-65) std::numeric_limits<int>::traps = false when integer arithmetic traps
Date Thu, 08 Dec 2005 20:58:11 GMT
     [ http://issues.apache.org/jira/browse/STDCXX-65?page=all ]
     
Martin Sebor closed STDCXX-65:
------------------------------


Fix confirmed.

> std::numeric_limits<int>::traps = false when integer arithmetic traps
> ---------------------------------------------------------------------
>
>          Key: STDCXX-65
>          URL: http://issues.apache.org/jira/browse/STDCXX-65
>      Project: STDCXX
>         Type: Bug
>   Components: 18. Language Support
>     Versions: 4.1.2
>  Environment: all
>     Reporter: Martin Sebor
>     Assignee: Martin Sebor
>     Priority: Minor
>      Fix For: 4.1.3

>
> The program below aborts. See also the related LWG issue 497:
> http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html#497
> $ cat t.cpp && nice make t -r CPPOPTS=-DSIGTRAP=5 && ./t
> #include <cassert>
> #include <csetjmp>
> #include <csignal>
> #include <limits>
> std::jmp_buf env;
> extern "C" void handle_trap (int)
> {
>     std::longjmp (env, 1);
> }
> volatile int zero;
> int main ()
> {
>     const bool traps = std::numeric_limits<int>::traps;
>     bool trapped = false;
>     std::signal (SIGFPE, handle_trap);
>     std::signal (SIGTRAP, handle_trap);
>     if (0 == setjmp (env)) {
>         zero = 2 / zero;
>     }
>     else {
>         trapped = true;
>     }
>     assert (traps && trapped || !traps && !trapped);
> }
> eccp -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG    -D_RWSTD_USE_CONFIG -I/build/sebor/eccp-3.6-11s/include
-I/build/sebor/dev/stdlib/include -I/build/sebor/dev/stdlib/../rwtest -I/build/sebor/dev/stdlib/../rwtest/include
-I/build/sebor/dev/stdlib/tests/include -DSIGTRAP=5 -A -x --template_directory=/build/sebor/eccp-3.6-11s/lib
-g  --display_error_number --remarks --diag_suppress 193,236,340,401,261,479,487,678,679,815
 t.cpp
> eccp t.o -o t -L/build/sebor/eccp-3.6-11s/rwtest -lrwtest11s --template_directory=/build/sebor/eccp-3.6-11s/lib
  -L/build/sebor/eccp-3.6-11s/lib -lstd11s   -lm
> t.cpp:30: Assertion 'traps && trapped || !traps && !trapped' failed.
> /build/sebor/eccp-3.6-11s/tests/t:__rw_assert_fail__4__rwFPCcT1iT1+0x84
> /build/sebor/eccp-3.6-11s/tests/t:main+0xcc
> /build/sebor/eccp-3.6-11s/tests/t:_start+0x5c
> Abort (core dumped)

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