http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51615
Bug #: 51615
Summary: Condition Variable queue state corruption and infinite
loop
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcj
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: nwfila...@gmail.com
When attempting to run ecj-3.8M4.jar on a large number of files, gij hangs.
(On a small number of files, it runs fine, curiously enough.)
Invoking gdb (7.3.1), I see that the thread is stuck in
(gdb) bt
#0 _Jv_CondWait (cv=0x1729a48, mu=, millis=,
nanos=)
at ../.././../gcc-4.7-20111210/libjava/posix-threads.cc:241
#1 0x419d99b8 in java::lang::Object::wait (this=0x1704900,
timeout=250,
nanos=) at
../.././../gcc-4.7-20111210/libjava/java/lang/natObject.cc:226
#2 0x42486aa4 in ffi_call_v9 () at
../.././../gcc-4.7-20111210/libffi/src/sparc/v9.S:83
#3 0x42486400 in ffi_call (cif=0x1815f08, fn=,
rvalue=0x7fdff7f97e8,
avalue=0x7fdff7f9680) at
../.././../gcc-4.7-20111210/libffi/src/sparc/ffi.c:415
#4 0x424830c8 in ffi_java_raw_call (cif=, fn=,
rvalue=, raw=)
at ../.././../gcc-4.7-20111210/libffi/src/java_raw_api.c:300
#5 0x419b6430 in _Jv_InterpMethod::run (retp=0x7fdff7f9aa0,
args=0x419b6d9c, meth=0x13a0c00)
at ../.././../gcc-4.7-20111210/libjava/interpret-run.cc:613
#6 0x42483028 in ffi_java_translate_args (cif=,
rvalue=,
avalue=, user_data=)
at ../.././../gcc-4.7-20111210/libffi/src/java_raw_api.c:314
#7 0x424867e0 in ffi_closure_sparc_inner_v9 (closure=,
rvalue=0x7fdff7f9aa0,
gpr=0x7fdff7f9bc0, fpr=0x7fdff7f9ac0) at
../.././../gcc-4.7-20111210/libffi/src/sparc/ffi.c:621
#8 0x42486b90 in ffi_closure_v9 () at
../.././../gcc-4.7-20111210/libffi/src/sparc/v9.S:181
#9 0x41dd2ce8 in java.lang.Thread.run()void (this=)
at
/var/ports/usr/ports/lang/gcc47/work/gcc-4.7-20111210/libjava/java/lang/Thread.java:761
#10 0x419ddbec in _Jv_ThreadRun (thread=)
at ../.././../gcc-4.7-20111210/libjava/java/lang/natThread.cc:335
#11 0x419e78a8 in really_start (x=)
at ../.././../gcc-4.7-20111210/libjava/posix-threads.cc:639
#12 0x4249950c in GC_start_routine (arg=0x12ca120)
at ../.././../gcc-4.7-20111210/boehm-gc/pthread_support.c:1301
#13 0x43c68890 in ?? () from /lib/libthr.so.3
#14 0x43c68890 in ?? () from /lib/libthr.so.3
and if I
(gdb) print cv.first
$14 = (_Jv_Thread_t *) 0x446c4830
(gdb) print cv.first.next
$15 = (_Jv_Thread_t *) 0x446c4830
which is obviously bad since the loop we're stuck in is over ->next pointers
until we see a NULL, which we won't. Note that current has also become
corrupted in the same way:
(gdb) print current
$16 = (_Jv_Thread_t *) 0x446c4860
(gdb) print current.next
$17 = (_Jv_Thread_t *) 0x446c4860
I am on a FreeBSD/sparc64 machine, running 8.2 and using gcc47 from ports
(which means exactly 4.7.0 20111210). It's quite easy to get into this state,
so if I've left something out please don't hesitate to ask.
