> I’ve managed to build valgrind after patching with 64365,64147,64366,64946
> AND using the following configure:
[[snip]]
>
> ==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 hints that it might be a good idea to double-check that the actual code
does contain the part of patch 64147 that provides 16KB alignment for mmap:
Index: coregrind/m_syswrap/syswrap-generic.c
===================================================================
--- coregrind/m_syswrap/syswrap-generic.c (revision 12084)
+++ coregrind/m_syswrap/syswrap-generic.c (working copy)
@@ -2025,8 +2025,19 @@
mreq.rkind = MAny;
}
+ /* handle alignment to 4 pages we need for MAP_FIXED to succeed on ARM */
[[snip]]
Also, run with valgrind command-line parameter "--trace-syscalls=yes"
and check the parameter values for mmap():
valgrind --trace-syscalls=yes ./my_app ...
Another way to do this is to run valgrind under strace:
strace valgrind ./my_app ...
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