Hi, I added some debug message as follows
// ooo-pipe.cpp
if unlikely (isclass(uop.opcode, OPCLASS_BRANCH)) {
+ if !uop.emo
ptl_logfile << "uop eom is 0\n", uop.rip, flush;
assert(uop.eom);
I then started the VM and the simulation. When the VM crashes as before, the
last line of log file is
uop eom is 0 [0xffffffffa01235ce ss64 krn mfn 0]
Could anyone figure out why the branch opcode's eom is not set? Please let me
know if more information is needed.
- Hui
From: Hui Kang <[email protected]<mailto:[email protected]>>
Date: Thu, 10 May 2012 16:53:18 -0400
To: Paul Rosenfeld <[email protected]<mailto:[email protected]>>
Cc: marss mailing list
<[email protected]<mailto:[email protected]>>
Subject: Re: [marss86-devel] crash when simulating a fedora 14 OS
Hi, Paul,
No, it is fedora 14 x86_64 version.
- Hui
From: Paul Rosenfeld <[email protected]<mailto:[email protected]>>
Date: Thu, 10 May 2012 16:47:26 -0400
To: Hui Kang <[email protected]<mailto:[email protected]>>
Cc: marss mailing list
<[email protected]<mailto:[email protected]>>
Subject: Re: [marss86-devel] crash when simulating a fedora 14 OS
Are you running a 32bit version of Fedora by chance?
On Thu, May 10, 2012 at 4:26 PM, Hui Kang
<[email protected]<mailto:[email protected]>> wrote:
Hi,
I am using marssx86 to run a fedora 14 os. After I boot the machine and
start the simulation from the QEMU monitor, the VM exits with some error
message.
Completed 321000 cycles, 152247 commits: 192571 Hz,
226715
Completed 395000 cycles, 192288 commits: 368144 Hz,
199200
Completed 509000 cycles, 219744 commits: 564596 Hz,
135978
Completed 564000 cycles, 263019 commits: 274601 Hz,
216061
Completed 607000 cycles, 309815 commits: 212271 Hz,
231010 insns/sec: rip ffffffff811c2305qemu-system-x86_64:
ptlsim/build/core/ooo-core/ooo-pipe.cpp:2131: int
ooo::ReorderBufferEntry::commit(): Assertion `uop.eom' failed.
I did a quick search online and find this maybe caused by an unsupported
opcode, but I am not sure about the cause.
Could anyone tell me how to debug this error message or find the
unsupported opcode? Thanks.
- Hui
PS.
More information Š.
The code snippet is from ooo-pipe.cpp is
if unlikely (isclass(uop.opcode, OPCLASS_BRANCH)) {
assert(uop.eom);
If the uop is a branch class opcode and it should be set an eom. This
looks an exception for this case.
Any comment?
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