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digitalmars.D.bugs - [Issue 8152] New: Linking C library causes Seg-fault

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           Summary: Linking C library causes Seg-fault
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Mac OS X
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: stephan.schiffels mac.com



---
The following program tries to trivially run a function from the GSL. It
compiles, but generates a segmentation fault when run.


gsltest.d
--------------------------
import std.stdio;

extern (C) double gsl_sf_hyperg_2F1(double a, double b, double c,
double x);

void main() {
  double f = 0.0025;
  auto ret = f * gsl_sf_hyperg_2F1(1.0, 10.0, 11.0, 1.0 - f /
0.025);
  writeln(ret);
}
---------------------------

The program should return 0.015681, which is the
numerically correct result. Note that the bug can not be in the GSL itself, as
it works correctly when used with C or C++.

To compile and run the code, I used the following command line:

rdmd -L-L/opt/local/lib -L-lgsl -L-lgslcblas gsltest.d
(assuming that gel libraries are in /opt/local/lib)

This seems to be a bug related to how C library functions are called from D.

Stephan

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next sibling parent d-bugmail puremagic.com writes:
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---
I ran the executable through the GNU debugger. Here is the output:

Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: 13 at address: 0x0000000000000000
0x00007fff912a86cd in misaligned_stack_error_entering_dyld_stub_binder ()


And most peculiar by the way: If I drop the variable f, but simply put 0.025
directly in front of the function, the program does NOT crash...

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |clugdbug yahoo.com.au



Related to bug 5570?

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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---


 Related to bug 5570?


That may well be. I am unable to check how things compare between 32 and 64
bits, though. 

Stephan

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Stephan <stephan.schiffels mac.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED



---
This issue is resolved. Tested on dmd 2.061.
Thanks for fixing!

Stephan

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