On Mon, Mar 04, 2013 at 05:37:31PM +0100, Aurélien Jarno wrote:
Hi,
On Sat, Feb 23, 2013 at 11:10:18PM +0100, Stefan Weil wrote:
This assertion occured with latest git master:
qemu-system-mipsel: /src/qemu/tcg/tcg-op.h:2589:
tcg_gen_goto_tb: Assertion `(tcg_ctx.goto_tb_issue_mask & (1 << idx))
== 0' failed.
Aborted
QEMU was built with --enable-debug and running a Debian MIPS Lenny (NFS
root).
The assertion happened when running "apt-get update" in the guest.
Is it something reproductible or more or less random? Have you Cc:ed
Richard because it's related to the latest patches?
On my side I am experiencing random segfaults in various guests (at
least PowerPC, MIPS, SH4 and ARM). I have found a way to bisect it, even
if it is quite long (building Perl + the testsuite). Currently I know
that 1.3 is affected, while 1.2 is not.
I have found that the issue comes from the following commits, which
unfortunately are not bisectable one by one (though it won't change the
results a lot):
commit b76f0d8c2e3eac94bc7fd90a510cb7426b2a2699
Author: Yeongkyoon Lee <address@hidden>
Date: Wed Oct 31 16:04:25 2012 +0900
tcg: Optimize qemu_ld/st by generating slow paths at the end of a block
Add optimized TCG qemu_ld/st generation which locates the code of TLB miss
cases at the end of a block after generating the other IRs.
Currently, this optimization supports only i386 and x86_64 hosts.
Signed-off-by: Yeongkyoon Lee <address@hidden>
Signed-off-by: Blue Swirl <address@hidden>
commit fdbb84d1332ae0827d60f1a2ca03c7d5678c6edd
Author: Yeongkyoon Lee <address@hidden>
Date: Wed Oct 31 16:04:24 2012 +0900
tcg: Add extended GETPC mechanism for MMU helpers with ldst optimization
Add GETPC_EXT which is used by MMU helpers to selectively calculate the code
address of accessing guest memory when called from a qemu_ld/st
optimized code
or a C function. Currently, it supports only i386 and x86-64 hosts.
Signed-off-by: Yeongkyoon Lee <address@hidden>
Signed-off-by: Blue Swirl <address@hidden>
commit 32761257c0b9fa7ee04d2871a6e48a41f119c469
Author: Yeongkyoon Lee <address@hidden>
Date: Wed Oct 31 16:04:23 2012 +0900
configure: Add CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization
Enable CONFIG_QEMU_LDST_OPTIMIZATION for TCG qemu_ld/st optimization only when
a host is i386 or x86_64.
Signed-off-by: Yeongkyoon Lee <address@hidden>
Signed-off-by: Blue Swirl <address@hidden>
I will try to understand why.