[Bug libgcj/10746] [3.3/3.4 regression] [win32] garbage collection crash in GCJ

["oyvind dot harboe at zylin dot com" <gcc-bugzilla at gcc dot gnu dot org>]

PLEASE REPLY TO gcc-bugzilla@gcc.gnu.org ONLY, *NOT* gcc-bugs@gcc.gnu.org.

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10746



------- Additional Comments From oyvind dot harboe at zylin dot com  2003-08-15 09:50 -------
I compiled and ran the test with the latest GCJ 3.4, but but it still crashes. 

I believe the chkstk function in cygwin.asm is a red herring and that the real 
problem is in the function disassembled below.





-	0x410a90	<_ZN4java4lang6Object8getClassEv>:		push   %
ebp
-	0x410a91	<_ZN4java4lang6Object8getClassEv+1>:		mov    %
esp,%ebp
-	0x410a93	<_ZN4java4lang6Object8getClassEv+3>:		mov    
0x8(%ebp),%eax
-	0x410a96	<_ZN4java4lang6Object8getClassEv+6>:		pop    %
ebp
-	0x410a97	<_ZN4java4lang6Object8getClassEv+7>:		mov    
(%eax),%eax
-	0x410a99	<_ZN4java4lang6Object8getClassEv+9>:		mov    
(%eax),%eax
-	0x410a9b	<_ZN4java4lang6Object8getClassEv+11>:		ret    
-	0x410a9c	<_ZN4java4lang6Object8getClassEv+12>:		lea    
0x0(%esi,1),%esi















[stuff deleted]
first thread 845000 cccfffbaad
second thread 1806000 ggfcace
second thread 1807000 ccdgbga
second thread 1808000 bcggc
second thread 1809000 caddbd

Program received signal SIGSEGV, Segmentation fault.
0x00410a99 in _ZN4java4lang6Object8getClassEv () at /datal/gcc/gcc/gcc/config/i3
86/cygwin.asm:29
29      /datal/gcc/gcc/gcc/config/i386/cygwin.asm: No such file or directory.
        in /datal/gcc/gcc/gcc/config/i386/cygwin.asm
Current language:  auto; currently asm
(gdb) thread apply all bt

Thread 3 (thread 2112.0x72c):
#0  0x0057c464 in _Unwind_SjLj_Register () at /datal/gcc/gcc/libffi/src/x86/win3
2.S:224
#1  0x004421d8 in _ZN4java4util6Random4nextEi () at /datal/gcc/gcc/gcc/config/i3
86/cygwin.asm:29
#2  0x004425e4 in _ZN4java4util6Random10nextDoubleEv () at /datal/gcc/gcc/gcc/co
nfig/i386/cygwin.asm:29
#3  0x0040986e in _ZN4java4lang4Math6randomEv () at /datal/gcc/gcc/gcc/config/i3
86/cygwin.asm:29
#4  0x0040176f in Test.rndChar() () at Test.java:46
#5  0x00401a40 in Test.stressGB(java.lang.String) (thread=0xb5b960) at Test.java
:62
#6  0x0040131f in Test$1.run() (this=0xb5dfd0) at Test.java:34
#7  0x00406166 in _ZN4java4lang6Thread3runEv () at /datal/gcc/gcc/gcc/config/i38
6/cygwin.asm:29
#8  0x0041df27 in _Z13_Jv_ThreadRunPN4java4lang6ThreadE () at /datal/gcc/gcc/gcc
/config/i386/cygwin.asm:29
#9  0x0041d4c0 in _Z12really_startPv@4 () at /datal/gcc/gcc/gcc/config/i386/cygw
in.asm:29
#10 0x004670de in thread_start@4 () at /datal/gcc/gcc/gcc/config/i386/cygwin.asm
:29
#11 0x77e8b2d8 in lstrcmpiW () from /ecos-c/WINNT/system32/KERNEL32.DLL

Thread 2 (thread 2112.0x850):
#0  0x77f88e63 in ?? ()
#1  0x77ea9c13 in WaitForMultipleObjects () from /ecos-c/WINNT/system32/KERNEL32
.DLL
#2  0x00411873 in _ZN4java4lang6Object4waitExi () at /datal/gcc/gcc/gcc/config/i
386/cygwin.asm:29
#3  0x00405759 in _ZN4java4lang6Object4waitEv () at /datal/gcc/gcc/gcc/config/i3
86/cygwin.asm:29
#4  0x0041441f in _ZN3gnu3gcj7runtime15FinalizerThread3runEv () at /datal/gcc/gc
c/gcc/config/i386/cygwin.asm:29
#5  0x0041df27 in _Z13_Jv_ThreadRunPN4java4lang6ThreadE () at /datal/gcc/gcc/gcc
/config/i386/cygwin.asm:29
#6  0x0041d4c0 in _Z12really_startPv@4 () at /datal/gcc/gcc/gcc/config/i386/cygw
in.asm:29
#7  0x004670de in thread_start@4 () at /datal/gcc/gcc/gcc/config/i386/cygwin.asm
:29
#8  0x77e8b2d8 in lstrcmpiW () from /ecos-c/WINNT/system32/KERNEL32.DLL

Thread 1 (thread 2112.0x884):
#0  0x00410a99 in _ZN4java4lang6Object8getClassEv () at /datal/gcc/gcc/gcc/confi
g/i386/cygwin.asm:29
#1  0x0040145e in Test.replaceAll(java.lang.String, java.lang.String, java.lang.
String) (in=0x1043000, a=0x1048fd8, b=0xb5efd8) at Test.java:11
#2  0x00401aec in Test.stressGB(java.lang.String) (thread=0xb5b990) at Test.java
:63
#3  0x0040173d in Test.main(java.lang.String[]) (args=0xb56fe0) at Test.java:39
#4  0x00414892 in _ZN3gnu3gcj7runtime11FirstThread3runEv () at /datal/gcc/gcc/gc
c/config/i386/cygwin.asm:29
#5  0x0041df27 in _Z13_Jv_ThreadRunPN4java4lang6ThreadE () at /datal/gcc/gcc/gcc
/config/i386/cygwin.asm:29
#6  0x0040381f in _Z11_Jv_RunMainPN4java4lang5ClassEPKciPS4_b () at /datal/gcc/g
cc/gcc/config/i386/cygwin.asm:29
#7  0x004038ef in JvRunMain () at /datal/gcc/gcc/gcc/config/i386/cygwin.asm:29
#8  0x004012e2 in main (argc=1, argv=0x6a24d8)
(gdb)