Re: Exceptions on Windows being "swallowed"
Not sure if related to OP's issue, but quite often on Windows I get mystery crashes with no stack trace, so I typically use WinDbg Preview (modern version of WinDbg) to locate the problem. Seems to work every time.
Re: Exceptions on Windows being "swallowed"
On 27/11/2019 06:55, cartland wrote:
> On Wednesday, 27 November 2019 at 05:43:33 UTC, Mike Parker wrote:
>> On Wednesday, 27 November 2019 at 05:15:10 UTC, cartland wrote:
>> *snip*
>>
>> dmd -m32mscoff -debug -g x.d
>>
>> And see what happens.
>
> No difference between "dmd -m32mscoff -debug -g x.d" and "dmd -m32mscoff
> x.d"
>
>
> C:\tmp\x>dmd -m32mscoff -debug -g x.d
>
> C:\tmp\x>x
> hello
>
> C:\tmp\x>dmd x.d
>
> C:\tmp\x>x
> hello
> finally
> catch first
> done
> --
>
> x.d contents
>
> import std.stdio;
> void main() {
> writeln("hello");
> try {
> try {
> throw new Exception("first");
> } finally{
> writeln("finally");
> throw new Exception("second");
> }
> } catch (Exception e) {
> writeln("catch ", e.msg);
> }
> writeln("done");
> }
> ---
>
In a debugger, I get:
Unhandled exception at 0x004010EF in x.exe: 0xC1A5: An invalid
exception handler routine has been detected (parameters: 0x0001).
This seems to happen when lld is used instead of the Microsoft linker.
Maybe related: https://bugs.llvm.org/show_bug.cgi?id=42221
Using lld from LLVM 9 spits out errors "not compatible with SEH", but
links using /SAFESEH:NO. The resulting executable then works.
I have created an issue: https://issues.dlang.org/show_bug.cgi?id=20421
Re: Exceptions on Windows being "swallowed"
On Wednesday, 27 November 2019 at 05:43:33 UTC, Mike Parker wrote:
On Wednesday, 27 November 2019 at 05:15:10 UTC, cartland wrote:
*snip*
dmd -m32mscoff -debug -g x.d
And see what happens.
No difference between "dmd -m32mscoff -debug -g x.d" and "dmd
-m32mscoff x.d"
C:\tmp\x>dmd -m32mscoff -debug -g x.d
C:\tmp\x>x
hello
C:\tmp\x>dmd x.d
C:\tmp\x>x
hello
finally
catch first
done
--
x.d contents
import std.stdio;
void main() {
writeln("hello");
try {
try {
throw new Exception("first");
} finally{
writeln("finally");
throw new Exception("second");
}
} catch (Exception e) {
writeln("catch ", e.msg);
}
writeln("done");
}
---
Re: Exceptions on Windows being "swallowed"
On Wednesday, 27 November 2019 at 05:15:10 UTC, cartland wrote: No MS installed. Just using DMD. - dub -a x86_mscoff --force -v : So please try it without dub dmd -m32mscoff x.d If that works, add some debug flags like dub does: dmd -m32mscoff -debug -g x.d And see what happens.
Re: Exceptions on Windows being "swallowed"
This works (once I installed Microsoft Visual C++ 2010 x64 Redistributable) : dub --force -v Seems the issue is with "x86_mscoff" -- : Performing "debug" build using C:\D\dmd2\windows\bin\dmd.exe for x86_64. x ~master: building configuration "application"... C:\D\dmd2\windows\bin\dmd.exe -m64 -c -of.dub\build\application-debug-windows-x86_64-dmd_2089-1DF706DBEDBB125C8784D2CAFEE4D94A\x.obj -debug -g -w -version=Have_x -Isource source\app.d -vcolumns Linking... C:\D\dmd2\windows\bin\dmd.exe -of.dub\build\application-debug-windows-x86_64-dmd_2089-1DF706DBEDBB125C8784D2CAFEE4D94A\x.exe .dub\build\application-debug-windows-x86_64-dmd_2089-1DF706DBEDBB125C8784D2CAFEE4D94A\x.obj -m64 -g Copying target from C:\tmp\x\.dub\build\application-debug-windows-x86_64-dmd_2089-1DF706DBEDBB125C8784D2CAFEE4D94A\x.exe to C:\tmp\x Running .\x.exe finally catch %sfirst done
Re: Exceptions on Windows being "swallowed"
On Wednesday, 27 November 2019 at 04:11:44 UTC, Mike Parker wrote: On Wednesday, 27 November 2019 at 02:48:53 UTC, cartland wrote: Trying out exception handling. When an exception occurs, program seems to just exit. dub -a x86_mscoff I compiled it with dmd and ran it directly from the command line and it worked fine: hmmm! Did you try that? And do you have the MS linker installed or are you using the lld that ships with DMD? No MS installed. Just using DMD. - dub -a x86_mscoff --force -v : Generating using build Configuring dependent x, deps: Performing "debug" build using C:\D\dmd2\windows\bin\dmd.exe for x86, x86_mscoff. x ~master: building configuration "application"... C:\D\dmd2\windows\bin\dmd.exe -m32mscoff -c -of.dub\build\application-debug-windows-x86.x86_mscoff-dmd_2089-6ACE9C396DEB2C31A239A4E275587962\x.obj -debug -g -w -version=Have_x -Isource source\app.d -vcolumns Linking... C:\D\dmd2\windows\bin\dmd.exe -of.dub\build\application-debug-windows-x86.x86_mscoff-dmd_2089-6ACE9C396DEB2C31A239A4E275587962\x.exe .dub\build\application-debug-windows-x86.x86_mscoff-dmd_2089-6ACE9C396DEB2C31A239A4E275587962\x.obj -m32mscoff -g Copying target from C:\tmp\x\.dub\build\application-debug-windows-x86.x86_mscoff-dmd_2089-6ACE9C396DEB2C31A239A4E275587962\x.exe to C:\tmp\x Running .\x.exe Program exited with code -532414463 Two things regarding your code: Thanks for the advice. It was just a quick cut and paste from the sample code to test.
Re: Exceptions on Windows being "swallowed"
On Wednesday, 27 November 2019 at 02:48:53 UTC, cartland wrote:
Trying out exception handling. When an exception occurs,
program seems to just exit.
dub -a x86_mscoff
I compiled it with dmd and ran it directly from the command line
and it worked fine:
C:\dev\D\scratch>ex
finally
catch %sfirst
done
Did you try that? And do you have the MS linker installed or are
you using the lld that ships with DMD?
Two things regarding your code:
writeln does no formatting. You want writefln for that. But with
writeln, you can provide multiple string arguments and they will
be concatenated into the final output, like this:
writeln("catch ", e.msg);
Also, you don't need the `int main` signature if you don't
actually need the return value to signify anyting:
void main() { }}
is just fine.
Exceptions on Windows being "swallowed"
Trying out exception handling. When an exception occurs, program
seems to just exit.
dub -a x86_mscoff
Performing "debug" build using C:\D\dmd2\windows\bin\dmd.exe for
x86, x86_mscoff.
x ~master: target for configuration "application" is up to date.
To force a rebuild of up-to-date targets, run again with --force.
Running .\x.exe
Program exited with code -532414463
---
//from https://dlang.org/spec/statement.html#try-statement
import std.stdio;
int main(){
try{
try {
throw new Exception("first");
} finally {
writeln("finally");
throw new Exception("second");
}
} catch (Exception e){
writeln("catch %s", e.msg);
}
writeln("done");
return 0;
}
---
