Bug ID: 6550813 Crash because of FPU control word being modified by native code (win32)

6550813 : Crash because of FPU control word being modified by native code (win32)

Details

Type:	Bug	Submit Date:	2007-04-26
Status:	Closed	Updated Date:	2011-12-26
Project Name:	JDK	Resolved Date:	2011-04-25
Component:	hotspot	OS:	generic,windows_xp,windows_2000
Sub-Component:	runtime	CPU:	x86
Priority:	P5
Resolution:	Fixed
Affected Versions:	5.0,6,6u1
Fixed Versions:	hs11

Related Reports

Backport:	JDK-2177018 - Crash because of FPU control word being modified by native code (win32)
Backport:	JDK-2151727 - Crash because of FPU control word being modified by native code (win32)
Backport:	JDK-2151728 - Crash because of FPU control word being modified by native code (win32)
Duplicate:	JDK-6551856 - Azureus doesn't work with Java 6 Update 1
Duplicate:	JDK-6346124 - vm should be resilient against jni code that changes fpu control word
Relates:	JDK-7012961 - runtime/jni/WindowsExceptionFilter/WindowsExceptionFilter01 crashes on windows-amd64
Relates:	JDK-6192333 - AMD64: linux/solaris: vm should not restore mxcsr across native calls
Relates:	JDK-6918421 - in-process JVM now ignores preset Windows unhandled exception filter
Relates:	JDK-6825772 - DEBUG MESSAGE: corrupted control word detected

Sub Tasks

Description

Since JDK 6u1 released to the public, we have seen a marked increase in JVM crashes
reported by Azureus users that seem to be connected to the 6u1 version and a product 
called Alcohol 120. Customers have been recommended to downgrade their Java or 
uninstall Alcohol. 

Attached a selection of crashes - note they all are of type

EXCEPTION_FLT_DIVIDE_BY_ZERO or EXCEPTION_FLT_STACK_CHECK

Comments

EVALUATION This bug is not a regression. Alcohol 120% is a CD/DVD backup program which can create <file>.mds archives. This is not a legitimate BitTorrent file type. Trying to share .mds files using java-based Azureus, may expose the native code problem in Alcohol 120%. So, it is not that Java/Azureus stopped working (regression) but that .mds files started to be shared. So, I'm going to remove the 'REGRESSION' from the synopsis. We have a defensive workaround for the problem, to restore the floating point control word if third-party native code does not.
2007-09-04
SUGGESTED FIX Webrev at http://jruntime.east/~ik199011/my_webrevs/6550813_7.0_webrev/
2007-08-13
WORK AROUND Renaming the AXShlEx.dll usually makes Azureus work again
2007-05-25
EVALUATION The initial eveluator, an engineer from Azurius and myself could dot reproduce the crash. Finally it was revealed at http://forum.alcohol-soft.com/index.php?s=fe16f40d559330c7833ad09271e9ed19&showtopic=25775&hl=azureus&st=20 that these crashes are caused by AXShlEx.dll when one downloads MDS files. Because MDS files are likely to contain non-ligitimate media data Alcohol guys dodn't want to persue this issue any more. I will lower the priority of this bug.
2007-05-25

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