Hard Crash on OS X and Linux (but somewhat environment dependent)
Gilles Duboscq
duboscq at ssw.jku.at
Wed Dec 10 10:58:25 UTC 2014
Sorry i mean the "condition" argument (which the second to last in your case).
On Wed, Dec 10, 2014 at 11:53 AM, Gilles Duboscq <duboscq at ssw.jku.at> wrote:
> Hello Stefan,
>
> I see a lot of unsafeCast calls where the last argument is true. That
> sounds dangerous.
> Are you sure your casts really *always* hold? Regardless of
> control-flow? This argument should be the condition under which that
> cast is safe, which is usually a condition that you have already
> checked in the control-flow that leads to the cast.
>
> -Gilles
>
> On Wed, Dec 10, 2014 at 12:15 AM, Stefan Marr <java at stefan-marr.de> wrote:
>> Hi Gilles:
>>
>> Here the log file.
>>
>> Best regards
>> Stefan
>>
>>
>>
>>
>>
>>> On 10 Dec 2014, at 00:04, Gilles Duboscq <duboscq at ssw.jku.at> wrote:
>>>
>>> Hello Stefan,
>>>
>>> Thanks for the report.
>>> Could you send us the hs_err file as well (hs_err_pid68949.log)?
>>>
>>> -Gilles
>>>
>>> On Tue, Dec 9, 2014 at 11:35 PM, Stefan Marr <java at stefan-marr.de> wrote:
>>>> Hi:
>>>>
>>>> In one of my experiments, I got a hard crash of the Graal VM.
>>>> Error below.
>>>>
>>>> The error is somewhat dependent on either environment or for instance whether -ea and/or -esa are passed to the VM.
>>>> Though, I haven’t managed to find a way to avoid crashes reliably.
>>>>
>>>> To reproduced, you’ll need with a little API change (see patch below) or my version of GraalVM.
>>>>
>>>> git clone https://github.com/smarr/GraalVM.git
>>>> cd GraalVM
>>>> ./mx.sh --vm server build -p
>>>> cd ../
>>>> git clone -b mt-vs-pe/without-control-specialization https://github.com/smarr/TruffleSOM.git
>>>> cd TruffleSOM
>>>> ant
>>>> ../GraalVM/mxtool/mx --vm server vm -Xbootclasspath/a:build/classes som.vm.Universe -cp Smalltalk:Examples/Benchmarks/DeltaBlue Examples/Benchmarks/BenchmarkHarness.som DeltaBlue 1500 0 6000
>>>>
>>>> Best regards
>>>> Stefan
>>>>
>>>>
>>>> #
>>>> # A fatal error has been detected by the Java Runtime Environment:
>>>> #
>>>> # SIGSEGV (0xb) at pc=0x000000010d601e5b, pid=68949, tid=4867
>>>> #
>>>> # JRE version: Java(TM) SE Runtime Environment (8.0_20-b26) (build 1.8.0_20-b26)
>>>> # Java VM: OpenJDK 64-Bit Server VM (25.25-b02-internal-graal-unknown-venus-2-2014-12-09_22-44-20_CET mixed mode bsd-amd64 compressed oops)
>>>> # Problematic frame:
>>>> # J 7192 Graal com.oracle.graal.truffle.OptimizedCallTarget.callRoot([Ljava/lang/Object;)Ljava/lang/Object; (191 bytes) @ 0x000000010d601e5b [0x000000010d601e20+0x3b]
>>>> #
>>>> # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
>>>> #
>>>> # An error report file with more information is saved as:
>>>> # /Users/smarr/Projects/PostDoc/Truffle/som/hs_err_pid68949.log
>>>> Loaded disassembler from /Users/smarr/Projects/PostDoc/Truffle/graal/jdk1.8.0_20/product/jre/lib/hsdis-amd64.dylib
>>>> Compiled method (Graal) 12445 7192 4 com.oracle.graal.truffle.OptimizedCallTarget::callRoot (191 bytes)
>>>> total in heap [0x000000010d601cd0,0x000000010d601f50] = 640
>>>> relocation [0x000000010d601e08,0x000000010d601e20] = 24
>>>> main code [0x000000010d601e20,0x000000010d601edd] = 189
>>>> stub code [0x000000010d601edd,0x000000010d601ee0] = 3
>>>> oops [0x000000010d601ee0,0x000000010d601ef8] = 24
>>>> metadata [0x000000010d601ef8,0x000000010d601f00] = 8
>>>> scopes data [0x000000010d601f00,0x000000010d601f18] = 24
>>>> scopes pcs [0x000000010d601f18,0x000000010d601f48] = 48
>>>> dependencies [0x000000010d601f48,0x000000010d601f50] = 8
>>>> Compiled method (c2) 12445 2114 4 com.oracle.graal.truffle.OptimizedCallTarget::doInvoke (6 bytes)
>>>> total in heap [0x000000010c77b910,0x000000010c77bb58] = 584
>>>> relocation [0x000000010c77ba48,0x000000010c77ba60] = 24
>>>> main code [0x000000010c77ba60,0x000000010c77bac0] = 96
>>>> stub code [0x000000010c77bac0,0x000000010c77bae8] = 40
>>>> oops [0x000000010c77bae8,0x000000010c77baf0] = 8
>>>> metadata [0x000000010c77baf0,0x000000010c77baf8] = 8
>>>> scopes data [0x000000010c77baf8,0x000000010c77bb08] = 16
>>>> scopes pcs [0x000000010c77bb08,0x000000010c77bb38] = 48
>>>> dependencies [0x000000010c77bb38,0x000000010c77bb40] = 8
>>>> handler table [0x000000010c77bb40,0x000000010c77bb58] = 24
>>>>
>>>>
>>>> diff --git a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
>>>> index 8d00194..0670fad 100644
>>>> --- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
>>>> +++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/OptimizedCallTarget.java
>>>> @@ -104,7 +104,7 @@ public class OptimizedCallTarget extends InstalledCode implements RootCallTarget
>>>> if (root == null || !root.isCloningAllowed()) {
>>>> return null;
>>>> }
>>>> - return NodeUtil.cloneNode(root);
>>>> + return root.cloneRootNode();
>>>> }
>>>>
>>>> public Assumption getNodeRewritingAssumption() {
>>>> diff --git a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
>>>> index aebf748..2552eea 100644
>>>> --- a/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
>>>> +++ b/graal/com.oracle.truffle.api/src/com/oracle/truffle/api/nodes/RootNode.java
>>>> @@ -79,6 +79,10 @@ public abstract class RootNode extends Node {
>>>> return false;
>>>> }
>>>>
>>>> + public RootNode cloneRootNode() {
>>>> + return NodeUtil.cloneNode(this);
>>>> + }
>>>> +
>>>> /**
>>>> * Reports the execution count of a loop that is a child of this node. The optimization
>>>> * heuristics can use the loop count to guide compilation and inlining.
>>>>
>>>>
>>>>
>>>> --
>>>> Stefan Marr
>>>> INRIA Lille - Nord Europe
>>>> http://stefan-marr.de/research/
>>>>
>>>>
>>>>
>>
>> --
>> Stefan Marr
>> INRIA Lille - Nord Europe
>> http://stefan-marr.de/research/
>>
>>
>>
>>
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