It is not clear to me why the mmap fails.
A guess : it might be because the /tmp file system does not allow shared
memory files
to be put on this fs ?
You could try to run with -d -d -d -v -v -v to have more details.
Otherwise, you can bypass this particular problem by disabling the
Valgrind gdbserver.
For this, run with --vgdb=no.
Alternatively, you could try to use --vgdb-prefix=... to put the
gdbserver file on another file system.
Philippe
________________________________
==2776== error 22 Invalid argument
==2776== error VG_(am_shared_mmap_file_float_valgrind)
/tmp/vgdb-pipe-shared-mem-vgdb-2776-by-root-on-???
This maps in the code to:
coregrind/m_gdbserver/remote-utils.c:
SysRes res = VG_(am_shared_mmap_file_float_valgrind)
(sizeof(VgdbShared), VKI_PROT_READ|VKI_PROT_WRITE,
shared_mem_fd, (Off64T)0);
if (sr_isError(res)) {
sr_perror(res, "error
VG_(am_shared_mmap_file_float_valgrind) %s\n",
shared_mem);
fatal("");
coregrind/m_aspacemgr/aspacemgr-linux.c:
extern SysRes VG_(am_shared_mmap_file_float_valgrind)
( SizeT length, UInt prot, Int fd, Off64T offset )
{
return VG_(am_mmap_file_float_valgrind_flags) (length, prot,
VKI_MAP_FIXED|VKI_MAP_SHARED,
fd, offset );
}
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