Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread
-+--
Reporter: simonmar |Owner:
Type: bug | Status: new
Priority: normal|Milestone: 6.12.3
Component: Runtime System| Version: 6.8.1
Keywords:| Difficulty: Unknown
Os: Windows | Testcase: derefnull(ghci),
divbyzero(ghci)
Architecture: Unknown/Multiple | Failure: None/Unknown
-+--
Changes (by igloo):
* owner: igloo =
Comment:
This program, with the `seh_excn.*` files in the GHC tree:
{{{
#include seh_excn.h
void g(int *p) {
printf(1 Points to %d\n, *p);
printf(2 Not %d\n, 5 / 0);
printf(3 Points to %d\n, *p);
}
void h() {
printf(1 Points to %d\n, 6);
printf(2 Not %d\n, 5 / 0);
printf(3 Points to %d\n, 7);
}
void f(int *p) {
BEGIN_CATCH
g(p);
// h();
END_CATCH
}
int main(void) {
int p;
p = 28;
printf(Start\n);
f(p);
printf(End\n);
}
}}}
doesn't work properly:
{{{
$ ./seh
Start
1 Points to 28
}}}
(note that we don't get a divide by zero message)
whereas if you change it to call `h` rather than `g` then it does:
{{{
$ ./seh
Start
1 Points to 6
divide by zero
}}}
This is a problem because I think we want to do the exception handling in
`workerStart`, where we need to pass the `task` argument on.
I've looked at using the simpler-looking `AddVectoredExceptionHandler`
instead (which would mean we have to drop Win 2k support, I think), but
I'm getting
{{{
C:\cygwin\tmp/ccYnOVfO.o:seh2.c:(.text+0xe3): undefined reference to
`AddVectoredExceptionHandler'
C:\cygwin\tmp/ccYnOVfO.o:seh2.c:(.text+0xf6): undefined reference to
`RemoveVectoredExceptionHandler'
collect2: ld returned 1 exit status
}}}
--
Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:9
GHC http://www.haskell.org/ghc/
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Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread ---+ Reporter: simonmar | Owner: igloo Type: bug | Status: new Priority: normal| Milestone: 6.12 branch Component: Runtime System|Version: 6.8.1 Resolution:| Keywords: Difficulty: Unknown | Os: Windows Testcase: derefnull(ghci), divbyzero(ghci) | Architecture: Unknown/Multiple Failure: None/Unknown | ---+ Changes (by igloo): * failure: = None/Unknown * milestone: 6.12.1 = 6.12 branch -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread -+-- Reporter: simonmar |Owner: igloo Type: bug | Status: new Priority: normal|Milestone: 6.12.1 Component: Runtime System| Version: 6.8.1 Severity: normal| Resolution: Keywords:| Difficulty: Unknown Testcase: derefnull(ghci), divbyzero(ghci) | Os: Windows Architecture: Unknown/Multiple | -+-- Comment (by igloo): See also the mingw GCC 4.4.0 announcement info on exceptions: http://sourceforge.net/project/shownotes.php?release_id=691876 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread -+-- Reporter: simonmar |Owner: igloo Type: bug | Status: new Priority: normal|Milestone: 6.12.1 Component: Runtime System| Version: 6.8.1 Severity: normal| Resolution: Keywords:| Difficulty: Unknown Testcase: derefnull(ghci), divbyzero(ghci) | Os: Windows Architecture: Unknown/Multiple | -+-- Changes (by igloo): * milestone: 6.10.2 = 6.12.1 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread --+- Reporter: simonmar | Owner: igloo Type: bug | Status: new Priority: normal| Milestone: 6.10.2 Component: Runtime System|Version: 6.8.1 Severity: normal| Resolution: Keywords:| Difficulty: Unknown Testcase: derefnull(ghci), divbyzero(ghci) | Architecture: Unknown/Multiple Os: Windows | --+- Changes (by igloo): * milestone: 6.10.1 = 6.10.2 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread --+- Reporter: simonmar | Owner: igloo Type: bug | Status: new Priority: normal| Milestone: 6.10.1 Component: Runtime System|Version: 6.8.1 Severity: normal| Resolution: Keywords:| Difficulty: Unknown Testcase: derefnull(ghci), divbyzero(ghci) | Architecture: Unknown Os: Windows | --+- Changes (by igloo): * milestone: 6.8.3 = 6.10.1 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
Re: [GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread --+- Reporter: simonmar | Owner: igloo Type: bug | Status: new Priority: normal| Milestone: 6.8.3 Component: Runtime System|Version: 6.8.1 Severity: normal| Resolution: Keywords:| Difficulty: Unknown Testcase: derefnull(ghci), divbyzero(ghci) | Architecture: Unknown Os: Windows | --+- Changes (by igloo): * owner: = igloo * milestone: 6.8 branch = 6.8.3 -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
[GHC] #1820: Windows segfault-catching only works for the main thread
#1820: Windows segfault-catching only works for the main thread ---+ Reporter: simonmar| Owner: Type: bug | Status: new Priority: normal | Milestone: 6.8 branch Component: Runtime System | Version: 6.8.1 Severity: normal |Keywords: Difficulty: Unknown |Testcase: derefnull(ghci), divbyzero(ghci) Architecture: Unknown | Os: Windows ---+ On Windows, the RTS tries to catch segmentation faults and divide-by-zero exceptions using structured exception handling in `rts/Main.c`. Unfortunately this only works for the main thread, so if the exception occurs in another thread it won't be caught. GHCi runs all its computations in a separate thread, hence `derefnull(ghci)` and `divbyzero(ghci)` are failing. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/1820 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler___ Glasgow-haskell-bugs mailing list Glasgow-haskell-bugs@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-bugs
