[Bug java/36247] New: Segfault with -findirect-dispatch and --jni

[Bug java/36247] New: Segfault with -findirect-dispatch and --jni

[william dot fink at gmail dot com]

When compiling a simple java file with gcj the compiler output a segfault.
After several test and simplifications, it appears that the conditions of this
failure is:

- Use the -findirect-dispatch flag
- Use the --jni flag
- The class contains at last one jni method
- The class contains at last one constructor

If one this condition is unmet, the compilation succeed.

I tried compilling the .java, .class and .jar file, each time with the same
result.

Using strace the segfaulting program seems to be jc1

I have the same result with:
- gcj-4.2 (GCC) 4.2.3 (Ubuntu 4.2.3-2ubuntu6)
- gcj-4.3 (GCC) 4.3.0 [Compiled from sources]

-- Compiler output:
$ gcj-4.3 -findirect-dispatch --jni Test.java -c
Test.java: In class 'Test':
Test.java: In method 'foo()':
Test.java:0: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

-- Test case:
public class Test
{
  public native void foo ();

  public Test ()
  {
  }
}

-- strace part (with gcj 4.2 on Ubuntu)
[pid 13927] execve("/usr/lib/gcc/i486-linux-gnu/4.2.3/jc1",
["/usr/lib/gcc/i486-linux-gnu/4.2."..., "Test.class", "-fhash-synchronization",
"-fno-use-divide-subroutine", "-fuse-boehm-gc", "-fnon-call-exceptions",
"-fkeep-inline-functions", "-quiet", "-dumpbase", "Test.class",
"-mtune=generic", "-auxbase", "Test", "-g1", "-findirect-dispatch", "-fjni",
...], [/* 38 vars */]) = 0


-- 
           Summary: Segfault with -findirect-dispatch and --jni
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: java
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: william dot fink at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #1 from tromey at gcc dot gnu dot org  2008-05-16 18:23 -------
Confirmed


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-05-16 18:23:52
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #2 from tromey at gcc dot gnu dot org  2008-05-16 19:03 -------
in build_jni_stub, build_class_ref returns NULL because 
this_classdollar is NULL.
Probably we should call cache_this_class_ref here, but that
would mean making java_add_stmt work in the jni stub case.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #3 from tromey at gcc dot gnu dot org  2008-05-16 19:39 -------
Also, note that a workaround is to put the native method after
a non-native method.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #4 from tromey at gcc dot gnu dot org  2008-06-14 19:48 -------
Subject: Bug 36247

Author: tromey
Date: Sat Jun 14 19:48:05 2008
New Revision: 136786

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=136786
Log:
        PR java/36247:
        * class.c (build_class_ref): Initialize this_classdollar when

Modified:
    branches/gcc-4_3-branch/gcc/java/ChangeLog
    branches/gcc-4_3-branch/gcc/java/class.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #5 from tromey at gcc dot gnu dot org  2008-06-14 19:50 -------
Subject: Bug 36247

Author: tromey
Date: Sat Jun 14 19:49:45 2008
New Revision: 136787

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=136787
Log:
        PR java/36247:
        * class.c (build_class_ref): Initialize this_classdollar when

Modified:
    trunk/gcc/java/ChangeLog
    trunk/gcc/java/class.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247

[Bug java/36247] Segfault with -findirect-dispatch and --jni

[tromey at gcc dot gnu dot org]

------- Comment #6 from tromey at gcc dot gnu dot org  2008-06-14 19:50 -------
Fix checked in.


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.3.2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36247