From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 25897 invoked by alias); 12 May 2010 11:00:23 -0000 Received: (qmail 25877 invoked by uid 48); 12 May 2010 11:00:22 -0000 Date: Wed, 12 May 2010 11:00:00 -0000 Subject: [Bug java/44095] New: [4.5/4.6 regression] massive java failures due to -findirect-dispatch breakage on sparc64-linux X-Bugzilla-Reason: CC Message-ID: Reply-To: gcc-bugzilla@gcc.gnu.org To: java-prs@gcc.gnu.org From: "mikpe at it dot uu dot se" Mailing-List: contact java-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: java-prs-owner@gcc.gnu.org X-SW-Source: 2010-q2/txt/msg00041.txt.bz2 Java is severely broken on sparc64-linux with gcc 4.5/4.6, which is a major regression from 4.4: http://gcc.gnu.org/ml/gcc-testresults/2010-05/msg00853.html (4.6 broken) http://gcc.gnu.org/ml/gcc-testresults/2010-05/msg00681.html (4.5 broken) http://gcc.gnu.org/ml/gcc-testresults/2010-05/msg00472.html (4.4 works) The detailed test suite logs show that _every_ -findirect-dispatch test case SEGFAULTs shortly after startup. I've bisected trunk and identified r155622 as the cause: Author: jakub Date: Mon Jan 4 16:02:41 2010 New Revision: 155622 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155622 Log: PR driver/42442 * gcc.c (SWITCH_IGNORE_PERMANENTLY): Define. (do_self_spec): For switches with SWITCH_IGNORE set set also SWITCH_IGNORE_PERMANENTLY. (check_live_switch): Check SWITCH_IGNORE_PERMANENTLY instead of SWITCH_IGNORE. Let's compare installations of r155621 and r155622: > LD_LIBRARY_PATH=/mnt/scratch/install-r155621/lib: /mnt/scratch/install-r155621/bin/gcj -v -findirect-dispatch --main=ArrayStore2 ArrayStore2.jar ... /mnt/scratch/install-r155621/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/jc1 ArrayStore2.jar -fuse-divide-subroutine -fuse-boehm-gc -fnon-call-exceptions -fPIC -fkeep-inline-functions -quiet -dumpbase ArrayStore2.jar -mcpu=v8 -auxbase ArrayStore2 -g1 -version -findirect-dispatch -fbootclasspath=./:/mnt/scratch/install-r155621/share/java/libgcj-4.5.0.jar -o /tmp/ccCkBmCp.s ... as -V -Qy -s -K PIC -32 -relax -o /tmp/ccgzZvpI.o /tmp/ccCkBmCp.s ... /mnt/scratch/install-r155621/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/jvgenmain -findirect-dispatch ArrayStore2main /tmp/ccwLkVQ4.i ... /mnt/scratch/install-r155621/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/cc1 /tmp/ccwLkVQ4.i -quiet -dumpbase ArrayStore2main.c -mcpu=v8 -g1 -version -fdollars-in-identifiers -o /tmp/ccCkBmCp.s ... as -V -Qy -s -32 -relax -o /tmp/cc8Sx4xt.o /tmp/ccCkBmCp.s ... > LD_LIBRARY_PATH=/mnt/scratch/install-r155621/lib: ./a.out index rhs java.lang.ArrayIndexOutOfBoundsException > LD_LIBRARY_PATH=/mnt/scratch/install-r155622/lib: /mnt/scratch/install-r155622/bin/gcj -v -findirect-dispatch --main=ArrayStore2 ArrayStore2.jar ... /mnt/scratch/install-r155622/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/jc1 ArrayStore2.jar -fuse-divide-subroutine -fuse-boehm-gc -fnon-call-exceptions -fPIC -fkeep-inline-functions -quiet -dumpbase ArrayStore2.jar -mcpu=v8 -auxbase ArrayStore2 -g1 -version -findirect-dispatch -fbootclasspath=./:/mnt/scratch/install-r155622/share/java/libgcj-4.5.0.jar -o /tmp/cc5XY9sD.s ... as -V -Qy -s -K PIC -32 -relax -o /tmp/cc626Pob.o /tmp/cc5XY9sD.s ... /mnt/scratch/install-r155622/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/jvgenmain -findirect-dispatch ArrayStore2main /tmp/ccLsDapM.i ... /mnt/scratch/install-r155622/libexec/gcc/sparc64-unknown-linux-gnu/4.5.0/cc1 /tmp/ccLsDapM.i -quiet -dumpbase ArrayStore2main.c -mcpu=v8 -g1 -version -fdollars-in-identifiers -o /tmp/cc5XY9sD.s ... as -V -Qy -s -K PIC -32 -relax -o /tmp/ccw9Ke7n.o /tmp/cc5XY9sD.s ... > LD_LIBRARY_PATH=/mnt/scratch/install-r155622/lib:. ./a.out Segmentation fault The main difference is that in the working compiler, the java classes are assembled with -K PIC but the generated main() is not, while in the broken compiler both the java classes and the generated main() are assembled with -K PIC. If I force -K PIC with the working compiler it too fails: > LD_LIBRARY_PATH=/mnt/scratch/install-r155621/lib: /mnt/scratch/install-r155621/bin/gcj -findirect-dispatch --main=ArrayStore2 -Wa,-K,PIC ArrayStore2.jar > LD_LIBRARY_PATH=/mnt/scratch/install-r155621/lib: ./a.out Segmentation fault I note that gcc/java/jvspec.c has %