[Bug libgcj/25187] New: dereferencing type-punned pointer warnings while building libgcj

[Bug libgcj/25187] New: dereferencing type-punned pointer warnings while building libgcj

[pinskia at gcc dot gnu dot org]

/home/pinskia/src/newtest/trunk/libjava/java/lang/Class.h: In member function
'java::lang::Class* java::lang::Class::getComponentType()':
/home/pinskia/src/newtest/trunk/libjava/java/lang/Class.h:339: warning:
dereferencing type-punned pointer will break strict-aliasing rules
/home/pinskia/src/newtest/trunk/libjava/prims.cc: In function 'void
catch_segv(int)':
/home/pinskia/src/newtest/trunk/libjava/prims.cc:149: warning: dereferencing
type-punned pointer will break strict-aliasing rules
/home/pinskia/src/newtest/trunk/libjava/prims.cc: In function 'void
catch_fpe(int)':
/home/pinskia/src/newtest/trunk/libjava/prims.cc:161: warning: dereferencing
type-punned pointer will break strict-aliasing rules

/home/pinskia/src/newtest/trunk/libjava/jni.cc: In function 'jint
_Jv_JNI_DestroyJavaVM(JavaVM*)':
/home/pinskia/src/newtest/trunk/libjava/jni.cc:2440: warning: dereferencing
type-punned pointer will break strict-aliasing rules

/home/pinskia/src/newtest/trunk/libjava/interpret.cc: In static member function
'static void _Jv_InterpMethod::run(void*, ffi_raw*, _Jv_InterpMethod*)':
/home/pinskia/src/newtest/trunk/libjava/interpret.cc:808: warning:
dereferencing type-punned pointer will break strict-aliasing rules

/home/pinskia/src/newtest/trunk/libjava/gnu/gcj/io/natSimpleSHSStream.cc: In
static member function 'static JArray<__java_byte>*
gnu::gcj::io::SimpleSHSStream::shsFinal(JArray<__java_byte>*)':
/home/pinskia/src/newtest/trunk/libjava/gnu/gcj/io/natSimpleSHSStream.cc:32:
warning: dereferencing type-punned pointer will break strict-aliasing rules


I have not looked to see if these are false postives at all.


-- 
           Summary: dereferencing type-punned pointer warnings while
                    building libgcj
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: pinskia at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25187

[Bug libgcj/25187] dereferencing type-punned pointer warnings while building libgcj

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2005-11-30 18:55 -------
Some more:
/home/pinskia/src/newtest/trunk/libjava/java/lang/ref/natReference.cc: In
member function 'void java::lang::ref::Reference::create(java::lang::Object*)':
/home/pinskia/src/newtest/trunk/libjava/java/lang/ref/natReference.cc:366:
warning: dereferencing type-punned pointer will break strict-aliasing rules

/home/pinskia/src/newtest/trunk/libjava/boehm.cc: In function 'void*
_Jv_MarkArray(void*, void*, void*, void*)':
/home/pinskia/src/newtest/trunk/libjava/boehm.cc:377: warning: dereferencing
type-punned pointer will break strict-aliasing rules


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25187

[Bug libgcj/25187] dereferencing type-punned pointer warnings while building libgcj

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2005-11-30 20:34 -------
Confirmed, I completely forgot about these.  Most of them were false positives,
if I remember correctly.


-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |rguenth at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2005-11-30 20:34:58
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25187

[Bug libgcj/25187] dereferencing type-punned pointer warnings while building libgcj

[bryce at gcc dot gnu dot org]

------- Comment #3 from bryce at gcc dot gnu dot org  2006-02-09 01:35 -------
Subject: Bug 25187

Author: bryce
Date: Thu Feb  9 01:35:33 2006
New Revision: 110783

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=110783
Log:
2006-02-08  Bryce McKinlay  <mckinlay@redhat.com>

        PR libgcj/25187:
        * gnu/gcj/io/natSimpleSHSStream.cc
        (gnu::gcj::io::SimpleSHSStream::shsFinal): Remove bogus cast.
        * interpret.cc (_Jv_InterpMethod::run): Simplify arguments to
        _Jv_InterpFrame().
        * boehm.cc: #undef some autoconf macros before including gc-config.h.
        (_Jv_MarkObject): Don't mark the class, it is reachable via the vtable.
        (_Jv_MarkArray): Likewise.
        * java/lang/ref/natReference.cc (java::lang::ref::Reference::create):
        Simplify _Jv_GCRegisterDisappearingLink() call.
        * java/lang/Class.h (getComponentType): Use element_type.
        (element_type): New field declaration, as a union with "methods".
        * java/lang/natClassLoader.cc (_Jv_NewArrayClass): Use "element_type".
        * java/net/natVMNetworkInterfacePosix.cc
        (java::net::VMNetworkInterface::getInterfaces): Add "int" cast to
        avoid sign comparison warning.
        * include/java-interp.h (_Jv_InterpFrame): Take thread as second
        argument, not parent call frame.
        * include/x86_64-signal.h (MAKE_THROW_FRAME): Use "gregs" directly,
        without a cast.
        (restore_rt): Declare with hidden visibility, not "static".
        * posix.cc (_Jv_platform_initProperties): Make "tmpdir" a string
        constant.
        * jni.cc (_Jv_JNI_DestroyJavaVM): Use a union to avoid strict alias
        warning

Modified:
    trunk/libjava/ChangeLog
    trunk/libjava/boehm.cc
    trunk/libjava/gnu/gcj/io/natSimpleSHSStream.cc
    trunk/libjava/include/java-interp.h
    trunk/libjava/include/x86_64-signal.h
    trunk/libjava/interpret.cc
    trunk/libjava/java/lang/Class.h
    trunk/libjava/java/lang/natClassLoader.cc
    trunk/libjava/java/lang/ref/natReference.cc
    trunk/libjava/java/net/natVMNetworkInterfacePosix.cc
    trunk/libjava/jni.cc
    trunk/libjava/posix.cc


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25187

[Bug libgcj/25187] dereferencing type-punned pointer warnings while building libgcj

[mckinlay at redhat dot com]

------- Comment #4 from mckinlay at redhat dot com  2006-02-09 01:38 -------
Fixed.


-- 

mckinlay at redhat dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25187