tree 9145ea9b66a101772df527a4a9981aa3a7e31093
parent ec38d39827df4450fa08fc28f725542afa8c350f
author Stefan Weil <sw@weilnetz.de> 1320092986 +0100
committer Anthony Liguori <aliguori@us.ibm.com> 1320159845 -0500

Support running QEMU on Valgrind

Valgrind is a tool which can automatically detect many kinds of bugs.

Running QEMU on Valgrind with x86_64 hosts was not possible because
Valgrind aborts when memalign is called with an alignment larger than
1 MiB. QEMU normally uses 2 MiB on Linux x86_64.

Now the alignment is reduced to the page size when QEMU is running on
Valgrind.

v2:
Instead of using the macro RUNNING_ON_VALGRIND from valgrind.h,
the patch now uses a hack from libvirt which tests for the pre-loaded
vgpreload_*.so shared libraries. This avoids the need for valgrind.h.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>