Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[rearnsha]

Synopsis: arm-linux-gcj cross-compiler generates bad assembler-code

State-Changed-From-To: open->feedback
State-Changed-By: rearnsha
State-Changed-When: Sat Mar 23 09:47:17 2002
State-Changed-Why:
    OK, first-off I'm not a java programmer.  However, I've tried 
    running your test-case and I get a load of errors that suggest
    that the testcase is incomplete.  Please provide the missing
    information and/or instructions for how I can reproduce this
    in isolation.
    
    linux16:tmp [1093] $ ~/gnu/egcs/arm-elf/gcc/gcj -B ~/gnu/egcs/arm-elf/arm-el
    f/libjava/ -B ~/gnu/egcs/arm-elf/gcc/ -fCLASSPATH=./:/home/rearnsha/gnu/egcs/arm
    -elf/arm-elf/libjava/ -O2 -save-temps -dp -v --encoding=8859_1 -fassume-compiled
     -O2 -c DTDGrammar.java -MT lib_org_apache_xerces_la-DTDGrammar.lo -MD -MP -MF l
    ib_org_apache_xerces_la-DTDGrammar.TPlo  -fPIC  -o  lib_org_apache_xerces_la-DTD
    Grammar.lo
    Reading specs from /home/rearnsha/gnu/egcs/arm-elf/gcc/specs
    Reading specs from /home/rearnsha/gnu/egcs/arm-elf/arm-elf/libjava/libgcj.spec
    rename spec lib to liborig
    Configured with: /home/rearnsha/gnusrc/egcs-cross/configure --prefix=/home/rearn
    sha/gnu/egcs//arm-elf-install --disable-checking --target=arm-elf --with-headers
    =/home/rearnsha/gnusrc/egcs-cross/newlib/libc/include
    Thread model: single
    gcc version 3.2 20020322 (experimental)
     /home/rearnsha/gnu/egcs/arm-elf/gcc/jc1 DTDGrammar.java -fuse-divide-subroutine
     -fuse-boehm-gc -fnon-call-exceptions -fkeep-inline-functions -quiet -dumpbase D
    TDGrammar.java -dp -O2 -O2 -version -fCLASSPATH=./:/home/rearnsha/gnu/egcs/arm-e
    lf/arm-elf/libjava/ -fencoding=8859_1 -fassume-compiled -fPIC -MD -MT lib_org_ap
    ache_xerces_la-DTDGrammar.lo -MF lib_org_apache_xerces_la-DTDGrammar.TPlo -o DTD
    Grammar.s
    GNU Java version 3.2 20020322 (experimental) (arm-elf)
            compiled by GNU C version 2.96 20000731 (Red Hat Linux 7.1 2.96-81).
    Class path starts here:
        ./
        /home/rearnsha/gnu/egcs/arm-elf/arm-elf/libjava/
        /home/rearnsha/gnu/egcs//arm-elf-install/share/libgcj.jar/ (system) (zip)
    DTDGrammar.java:70: Class or interface `org.apache.xerces.validators.schema.XUti
    l' not found in import.
       import org.apache.xerces.validators.schema.XUtil;
              ^
    DTDGrammar.java:91: Superclass `Grammar' of class `org.apache.xerces.validators.
    dtd.DTDGrammar' not found.
           extends Grammar 
                   ^
    DTDGrammar.java:92: Superinterface `XMLDTDScanner.EventHandler' of class `org.ap
    ache.xerces.validators.dtd.DTDGrammar' not found.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5487

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[neroden]

Synopsis: arm-linux-gcj cross-compiler generates bad assembler-code

State-Changed-From-To: feedback->closed
State-Changed-By: neroden
State-Changed-When: Wed Jan  1 10:26:38 2003
State-Changed-Why:
    Testcase hasn't been cut down to be usable; been in feedback for 9 months.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5487

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[Richard Earnshaw]

The following reply was made to PR java/5487; it has been noted by GNATS.

From: Richard Earnshaw <rearnsha@arm.com>
To: tromey@redhat.com
Cc: Richard.Earnshaw@arm.com, gcc-gnats@gcc.gnu.org
Subject: Re: java/5487: arm-linux-gcj cross-compiler generates bad 
 assembler-code
Date: Tue, 26 Mar 2002 13:41:34 +0000

 tromey@redhat.com said:
 > OTOH, rhug is sort of a special case.  It is one of the important gcj
 > applications that we want to build out of the box. 
 
 Except, of course, that it doesn't; particularly for a cross system.
 
 
 
 ~/gnusrc/rhug/configure --target=arm-elf --prefix=/home/rearnsha/gnu/egcs/a
 rm-elf-install
 
 ...
 checking for gcj... no
 checking for gcjh... no
 configure: error: no acceptable gcjh found in $PATH
 cam-linux16:rhug [1006] $ arm-elf-gc
 arm-elf-gcc     arm-elf-gcj     arm-elf-gcov    
 arm-elf-gccbug  arm-elf-gcjh    
 
 It should be looking for the cross compiler, not a native one in a cross 
 build.
 
 I'm sorry, I just don't have the time to spend tracking down this problem; 
 there's just too many prerequisites that are in the way.  If someone can 
 produce an isolated test-case, which doesn't require pre-installing a load 
 of other packages, then I'll look into it further.
 
 R.
 

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[Tom Tromey]

The following reply was made to PR java/5487; it has been noted by GNATS.

From: Tom Tromey <tromey@redhat.com>
To: Richard.Earnshaw@arm.com
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code
Date: 25 Mar 2002 14:04:48 -0700

 >>>>> "Richard" == Richard Earnshaw <rearnsha@arm.com> writes:
 
 Richard>   What we do not want
 Richard>   ...
 Richard>     The location (URL) of the package that failed to build (we won't
 Richard>     download it, anyway, since you've already given us what we need to
 Richard>     duplicate the bug, haven't you? :-) 
 
 Yeah.  Java is a little different from C or C++.  You can't send a
 `.i' file that encapsulates everything you need for the bug.  Still, I
 agree that downloading something is a pain and it is much, much more
 convenient to have a small archive that demonstrates the bug.
 
 OTOH, rhug is sort of a special case.  It is one of the important gcj
 applications that we want to build out of the box.
 
 Tom

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[Richard Earnshaw]

The following reply was made to PR java/5487; it has been noted by GNATS.

From: Richard Earnshaw <rearnsha@arm.com>
To: Tom Tromey <tromey@redhat.com>
Cc: nobody@gcc.gnu.org, gcc-gnats@gcc.gnu.org, Richard.Earnshaw@arm.com
Subject: Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code 
Date: Mon, 25 Mar 2002 11:39:29 +0000

 tromey@redhat.com said:
 >  In the PR he says that the code comes from rhug.  You can find rhug
 >  here:
 >        http://sources.redhat.com/rhug/
 >    It's all available via anonymous cvs. 
 
 However, 
 
   http://gcc.gnu.org/bugs.html
 
 says:
 
   What we do not want
 
   ...
     The location (URL) of the package that failed to build (we won't
     download it, anyway, since you've already given us what we need to
     duplicate the bug, haven't you? :-) 
 
 
 

Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[Tom Tromey]

The following reply was made to PR java/5487; it has been noted by GNATS.

From: Tom Tromey <tromey@redhat.com>
To: rearnsha@gcc.gnu.org
Cc: gcc-bugs@gcc.gnu.org.jsantala@tml.hut.fi, gcc-gnats@gcc.gnu.org
Subject: Re: java/5487: arm-linux-gcj cross-compiler generates bad assembler-code
Date: 23 Mar 2002 21:05:55 -0700

 Richard> OK, first-off I'm not a java programmer.  However, I've tried
 Richard> running your test-case and I get a load of errors that
 Richard> suggest that the testcase is incomplete.  Please provide the
 Richard> missing information and/or instructions for how I can
 Richard> reproduce this in isolation.
 
 In the PR he says that the code comes from rhug.  You can find rhug
 here:
 
     http://sources.redhat.com/rhug/
 
 It's all available via anonymous cvs.
 
 I can build rhug fine on x86.  Last time I tried was a couple weeks
 ago.
 
 Tom

java/5487: arm-linux-gcj cross-compiler generates bad assembler-code

[jsantala]

>Number:         5487
>Category:       java
>Synopsis:       arm-linux-gcj cross-compiler generates bad assembler-code
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jan 25 01:46:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Jukka Santala
>Release:        3.1 20020122 (experimental)
>Organization:
>Environment:
Using Red Hat 7.1, with GCC compiled as arm-linux cross-compiler.
>Description:
Compiling specific Java file of the Red Hat GCJ/rhug tree:
arm-linux-gcj -fCLASSPATH=upstream/src:./upstream/src -O2 -save-temps -dp -v --encoding=8859_1 -fassume-compiled -O2 -c upstream/src/org/apache/xerces/validators/dtd/DTDGrammar.java -MT upstream/src/org/apache/xerces/validators/dtd/lib_org_apache_xerces_la-DTDGrammar.lo -MD -MP -MF upstream/src/org/apache/xerces/validators/dtd/.deps/lib_org_apache_xerces_la-DTDGrammar.TPlo  -fPIC  -o upstream/src/org/apache/xerces/validators/dtd/.libs/lib_org_apache_xerces_la-DTDGrammar.lo

Using arm-linux-gcc cross-compiler, GCJ generates object-files with undefined symbol references. For example:
/home/jsantala/rhug-clean/xerces/.libs/lib-org-apache-xerces.so: undefined reference to `.L153'
/home/jsantala/rhug-clean/xerces/.libs/lib-org-apache-xerces.so: undefined reference to `.L156'
nm output of affected source module:
         U .L153
         U .L156
000000d8 d _CD_org_apache_xerces_validators_dtd_DTDGrammar
...
>From assembler source:
...
.L164:
        bl      _Jv_ThrowBadArrayIndex(PLT)     @ 855   *call_value_symbol/1
[length = 4]
        .align  2
.L155:
        b       .L156
        b       .L156
        b       .L156
        b       .L156
        b       .L156
        b       .L156
        b       .L153
.L166:
        ldr     r3, .L169+20    @ 1003  pic_load_addr_arm       [length = 4]
...

If compiler is ran with -fverbose-asm, it crashes with segmentation fault ICE:
gcc version 3.1 20020122 (experimental)
 /skiff/local/lib/gcc-lib/arm-linux/3.1/jc1 upstream/src/org/apache/xerces/validators/dtd/DTDGrammar.java -fuse-divide-subroutine -fuse-boehm-gc -fnon-call-exceptions -fkeep-inline-functions -quiet -dumpbase DTDGrammar.java -dp -O2 -O2 -version -fCLASSPATH=upstream/src:./upstream/src -fverbose-asm -fencoding=8859_1 -fassume-compiled -fPIC -MD -MT upstream/src/org/apache/xerces/validators/dtd/lib_org_apache_xerces_la-DTDGrammar.lo -MF upstream/src/org/apache/xerces/validators/dtd/.deps/lib_org_apache_xerces_la-DTDGrammar.TPlo -o DTDGrammar.s
GNU Java version 3.1 20020122 (experimental) (arm-linux)
        compiled by GNU C version 3.0.3.
Class path starts here:
    upstream/src/
    ./upstream/src/
    ./
    /skiff/local/share/libgcj.jar/ (system) (zip)
upstream/src/org/apache/xerces/validators/dtd/DTDGrammar.java:174: internal error: Segmentation fault
(gdb) where
#0  get_mem_expr_from_op (op=0x0, paddressp=0xbfffef98)
    at ../../gcc/gcc/final.c:3016
#1  0x08127f09 in output_asm_operand_names (operands=0xbffff1b0,
    oporder=0xbffff050, nops=1) at ../../gcc/gcc/final.c:3061
#2  0x08128053 in output_asm_insn (
    template=0xbffff110 "ldm%?%d0fd\t%|sp!, {%|r4, %|r5, %|r6, %|r7, %|r8, %|r9, %|sl, %|pc}", operands=0xbffff1b0) at ../../gcc/gcc/final.c:3289
#3  0x0822130b in output_return_instruction (operand=0x0, really_return=1,
    reverse=0) at ../../gcc/gcc/config/arm/arm.c:7353
#4  0x0816eeed in output_259 (operands=0x83623c0, insn=0x4039a640)
    at insn-output.c:1325
#5  0x08126cc4 in get_insn_template (code=259, insn=0x4039a640)
    at ../../gcc/gcc/final.c:1809
#6  0x0812701c in final_scan_insn (insn=0x4039a640, file=0x8385d88,
    optimize=2, prescan=0, nopeepholes=0) at ../../gcc/gcc/final.c:2591
#7  0x08126c0a in final (first=0x40396580, file=0x8385d88, optimize=2,
    prescan=0) at ../../gcc/gcc/final.c:1787
#8  0x081f78b4 in rest_of_compilation (decl=0x401c1d98)
    at ../../gcc/gcc/toplev.c:3464
#9  0x08063d94 in source_end_java_method () at ../../gcc/gcc/java/parse.y:7457
#10 0x08065ab1 in java_expand_method_bodies (class=0x401ba6cc)
    at ../../gcc/gcc/java/parse.y:8133
...

File DTDGramma.java from Apache-XML Xerces-Java project attached. Linking passes with -O0, but not with -O1 or -O2
>How-To-Repeat:
arm-linux-gcj -fCLASSPATH=upstream/src:./upstream/src -O2 -save-temps -dp -v --encoding=8859_1 -fassume-compiled -O2 -c upstream/src/org/apache/xerces/validators/dtd/DTDGrammar.java -MT upstream/src/org/apache/xerces/validators/dtd/lib_org_apache_xerces_la-DTDGrammar.lo -MD -MP -MF upstream/src/org/apache/xerces/validators/dtd/.deps/lib_org_apache_xerces_la-DTDGrammar.TPlo  -fPIC  -o upstream/src/org/apache/xerces/validators/dtd/.libs/lib_org_apache_xerces_la-DTDGrammar.lo

Have not tried to minimize test-case yet.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="DTDGrammar.java"

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