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* [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode
@ 2006-07-18 17:16 aph at gcc dot gnu dot org
2006-07-18 17:21 ` [Bug java/28423] " tromey at gcc dot gnu dot org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: aph at gcc dot gnu dot org @ 2006-07-18 17:16 UTC (permalink / raw)
To: java-prs
In this test case (from jakarta-commons-collections) we expect to see an
OutOfMemoryError thrown. This doesn't always happen as it should, but only
when compiling from bytecode. And only with ecj...
public class OutOfMemoryError
{
private static void fail(String msg)
{
System.err.println(msg);
System.exit(1);
}
private static void gc() {
try {
// trigger GC
byte[][] tooLarge = new byte[1000000000][1000000000];
fail("you have too much RAM");
} catch (java.lang.OutOfMemoryError ex) {
System.gc(); // ignore
}
}
public static void main(String[] argv)
{
gc();
}
}
It depends on exactly how the bytecode compiler generates code.
This one fails:
Method name:"gc" private static Signature: ()void
Attribute "Code", length:70, max_stack:2, max_locals:0, code_length:22
0: ldc <Integer 1000000000>
2: ldc <Integer 1000000000>
4: multianewarray <Class [[B> 2
8: pop
This one doesn't fail:
Method name:"gc" private static Signature: ()void
Attribute "Code", length:66, max_stack:2, max_locals:1, code_length:22
0: ldc <Integer 1000000000>
2: ldc <Integer 1000000000>
4: multianewarray <Class [[B> 2
8: astore_0
It seems that the pop instruction in the first version causes the
multianewarray never to be invoked. The "oh so clever" ecj notices that
tooLarge is never used, so doesn't generate a slot for it.
--
Summary: multianewarray not always evaluated when compiling from
bytecode
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: java
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: aph at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28423
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/28423] multianewarray not always evaluated when compiling from bytecode
2006-07-18 17:16 [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode aph at gcc dot gnu dot org
@ 2006-07-18 17:21 ` tromey at gcc dot gnu dot org
2006-08-06 22:43 ` tromey at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: tromey at gcc dot gnu dot org @ 2006-07-18 17:21 UTC (permalink / raw)
To: java-prs
------- Comment #1 from tromey at gcc dot gnu dot org 2006-07-18 17:21 -------
I suspect this was solved on the gcj-eclipse branch
by flushing the quick stack in some cases.
--
tromey at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tromey at gcc dot gnu dot
| |org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28423
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/28423] multianewarray not always evaluated when compiling from bytecode
2006-07-18 17:16 [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode aph at gcc dot gnu dot org
2006-07-18 17:21 ` [Bug java/28423] " tromey at gcc dot gnu dot org
@ 2006-08-06 22:43 ` tromey at gcc dot gnu dot org
2006-08-07 9:54 ` aph at gcc dot gnu dot org
2007-01-30 21:03 ` tromey at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: tromey at gcc dot gnu dot org @ 2006-08-06 22:43 UTC (permalink / raw)
To: java-prs
------- Comment #2 from tromey at gcc dot gnu dot org 2006-08-06 22:43 -------
Shouldn't we just pull in the fix from the gcj-eclipse branch?
--
tromey at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2006-08-06 22:43:47
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28423
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/28423] multianewarray not always evaluated when compiling from bytecode
2006-07-18 17:16 [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode aph at gcc dot gnu dot org
2006-07-18 17:21 ` [Bug java/28423] " tromey at gcc dot gnu dot org
2006-08-06 22:43 ` tromey at gcc dot gnu dot org
@ 2006-08-07 9:54 ` aph at gcc dot gnu dot org
2007-01-30 21:03 ` tromey at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: aph at gcc dot gnu dot org @ 2006-08-07 9:54 UTC (permalink / raw)
To: java-prs
------- Comment #3 from aph at gcc dot gnu dot org 2006-08-07 09:54 -------
Sure, we should import the change.
--
aph at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
Last reconfirmed|2006-08-06 22:43:47 |2006-08-07 09:54:08
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28423
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/28423] multianewarray not always evaluated when compiling from bytecode
2006-07-18 17:16 [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode aph at gcc dot gnu dot org
` (2 preceding siblings ...)
2006-08-07 9:54 ` aph at gcc dot gnu dot org
@ 2007-01-30 21:03 ` tromey at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: tromey at gcc dot gnu dot org @ 2007-01-30 21:03 UTC (permalink / raw)
To: java-prs
------- Comment #4 from tromey at gcc dot gnu dot org 2007-01-30 21:03 -------
Fixed in 4.3.
--
tromey at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28423
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2007-01-30 21:03 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2006-07-18 17:16 [Bug java/28423] New: multianewarray not always evaluated when compiling from bytecode aph at gcc dot gnu dot org
2006-07-18 17:21 ` [Bug java/28423] " tromey at gcc dot gnu dot org
2006-08-06 22:43 ` tromey at gcc dot gnu dot org
2006-08-07 9:54 ` aph at gcc dot gnu dot org
2007-01-30 21:03 ` tromey at gcc dot gnu dot org
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