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[Bug runtime/16836] New: CFI expression underflow occurs during unwinding on some kernels
- From: "lberk at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: systemtap at sourceware dot org
- Date: Fri, 11 Apr 2014 21:47:53 +0000
- Subject: [Bug runtime/16836] New: CFI expression underflow occurs during unwinding on some kernels
- Auto-submitted: auto-generated
https://sourceware.org/bugzilla/show_bug.cgi?id=16836
Bug ID: 16836
Summary: CFI expression underflow occurs during unwinding on
some kernels
Product: systemtap
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: runtime
Assignee: systemtap at sourceware dot org
Reporter: lberk at redhat dot com
Running stap -e 'probe kernel.function("__run_hrtimer") { log ("hit!");
print_backtrace(); log("done"); exit(); }' on 3.13.6-100.fc19.x86_64,
3.13.7-100.fc19.x86_64 and 3.13.7-200.fc20.x86_64 causes a WARNING: DWARF
expression stack underflow in CFI (full output below)
WARNING: DWARF expression stack underflow in CFI
hit!
0xffffffff81091ff0 : __run_hrtimer+0x0/0x1d0 [kernel]
0xffffffff81092877 : hrtimer_interrupt+0xf7/0x240 [kernel]
0xffffffff81042dc7 : local_apic_timer_interrupt+0x37/0x60 [kernel]
0xffffffff8169203f : smp_apic_timer_interrupt+0x3f/0x60 [kernel]
0xffffffff816909dd : apic_timer_interrupt+0x6d/0x80 [kernel]
done
hit!
0xffffffff81091ff0 : __run_hrtimer+0x0/0x1d0 [kernel]
0xffffffff81092877 : hrtimer_interrupt+0xf7/0x240 [kernel]
0xffffffff81042dc7 : local_apic_timer_interrupt+0x37/0x60 [kernel]
0xffffffff8169203f : smp_apic_timer_interrupt+0x3f/0x60 [kernel]
0xffffffff816909dd : apic_timer_interrupt+0x6d/0x80 [kernel]
done
Pass 5: run completed in 10usr/70sys/679real ms.
This reportedly runs without the warning on 3.15.0-rc0.git9.1.fc21.x86_64
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