Debugging preprocessed Fortran code with pgdbg

Accelerated Computing HPC Compilers Legacy PGI Compilers
1

Hi,
I am trying to debug a F90 program which contains partially preprocessed Fortran 90 code (-Mpreprocess).
My compile flags include: -byteswapio -Minfo -Mbackslash -C -Ktrap …
Linking with: -Bstatic -Mlfs …
I am still using 7.0-7 pgf90 and pgdbg due to bugs in newer versions

I get a FPE and the debugger tells me where, e.g.
#3 run_fluxs_flx line: “/project/artemis/flux/source/flx_class.f90”@4452 address: 0x855348c
self = 0x1d30ffc0, lcycl = 6, converged = .FALSE., unit = 6
=> #2 fluxs_ address: 0x862aa9e
#1 rebals_ address: 0x865902c
#0 rebs_ address: 0x865d31e
So far, so good.

But pgdbg only shows assembler code for fluxs_, rebals_, and rebs_, no sources. These three sources were all preprocessed.

I can select fluxs.f90 in the source tab and the source is correctly shown. But now I can not set any breakpoints there, e.g. in fluxs.f90

And when I try to switch from disassemble to source, I get
pgdbg> Call level:1 rebals_ address: 0x865902c
ERROR: No current source file.

It seems the preprocessed sources are not available.
How do I access those preprocessed sources in the debugger so I can set breakpoints ?
Do I need additional flags? Are the preprocessed sources written to scratch and thus not available for debugging?
Any ideas would be appreciated.

Thanks,
hwb

2

Hi,

You need to compile with -g to be able to see the source.

Hongyon

3

I have compiled everything with -g, I just did not mentioned this in the first post.
I also mentioned that I can see the sources in pgdbg. But I can not set a breakpoint.

hwb

4

OK.
I think I identified the problem myself.
I can now set breakpoints in the preprocessed sources.

It seems the root cause was an old .pgdbgrc file containing
source location pathes which somehow mixed up the source path search process in pgdbg.

hwb

5

Hi,

Thanks for letting us know you found a solution.

Hongyon