Re: GSOC - valgrind-hurd queries

[Samuel Thibault]

Subhashish Pradhan, le Sun 17 Aug 2014 20:07:25 +0530, a écrit :
> I moved back to my college hostel this week so it was a bit busy.
> I apologise for the delay.

Sure. The firm deadline is google's, not mine :)

> I think you put my situation into words perfectly. Well, here's the report 
> [1].

You should probably have a tl;dr paragraph at the beginning, like a
dozen lines or two, which summarizes the achievements.

> P.S. - There's one error that's failing the make process. It's the
> last invocation in coregrind.

Notice the command difference between GNU and Linux:

> gcc  -fpic -O -g -fno-omit-frame-pointer -fno-strict-aliasing -fno-builtin 
> -Wno-long-long  -Wwrite-strings -fno-stack-protector   -o 
> vgpreload_core-x86-gnu.so vgpreload_core_x86_gnu_so-vg_preloaded.o  

vs

> gcc -m64 -O2 -g -Wall -Wmissing-prototypes -Wshadow -Wpointer-arith
> -Wstrict-prototypes -Wmissing-declarations -Wno-format-zero-length
> -fno-strict-aliasing -fno-builtin -fomit-frame-pointer -fpic -O -g
> -fno-omit-frame-pointer -fno-strict-aliasing -fno-builtin
> -Wno-long-long  -Wwrite-strings -fno-stack-protector -nodefaultlibs
> -shared -Wl,-z,interpose,-z,initfirst  -m64  -o
> vgpreload_core-amd64-linux.so
> vgpreload_core_amd64_linux_so-vg_preloaded.o  

The linux version has a very important -shared flag :)
You need to teach valgrind that GNU uses the same link flags etc. as
Linux to produced the .so files, see the definition of CFLAGS_MPI and
LDFLAGS_MPI in configure.ac, and of PRELOAD_LDFLAGS_COMMON_LINUX in
MAkefile.all.am.

>          Also, I believe I have to submit my work in the form of a
> patch-set on Melange, right?

Yes, but see the timeline: that'll be open on 22 August 20:00 UTC.

Samuel