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view test/compiler/6894807/Test6894807.sh @ 11825:463f51256c86
AMD64HotSpot: emit jump to IC miss handler directly instead of emitting it inside verfied_entry
for empty methods we emitted something like this if a inline cache is needed:
prefix:
00: < IC check >
...
0b: jne <ic_miss_call>
11: nop
...
verified_entry:
20: ret
ic_miss_call:
21: jmp <entry of runtime function>
when a method is deoptimized, HotSpot patches the verified_entry (0x20) with a
jump to a stub that handles call-sites that has been made non-entrant. since this jump
is 5 bytes long, it will overwrite ic_miss_call and blow up every caller that
calls this method via the unverified entry (prefix).
the fix is to emit the jump to the runtime function inside the unverfied entry:
prefix:
00: < IC check >
...
0b: je <verified_entry>
11: jeq <entry of runtime function>
16: nop
...
verified_entry:
20: ret
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 30 Sep 2013 09:32:18 +0200 |
parents | 83b6305a5638 |
children |
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#!/bin/sh if [ "${TESTSRC}" = "" ] then TESTSRC=. fi if [ "${TESTJAVA}" = "" ] then PARENT=`dirname \`which java\`` TESTJAVA=`dirname ${PARENT}` echo "TESTJAVA not set, selecting " ${TESTJAVA} echo "If this is incorrect, try setting the variable manually." fi if [ "${TESTCLASSES}" = "" ] then echo "TESTCLASSES not set. Test cannot execute. Failed." exit 1 fi # set platform-dependent variables OS=`uname -s` case "$OS" in SunOS | Linux | Darwin ) NULL=/dev/null PS=":" FS="/" ;; Windows_* ) NULL=NUL PS=";" FS="\\" ;; CYGWIN_* ) NULL=/dev/null PS=";" FS="/" ;; * ) echo "Unrecognized system!" exit 1; ;; esac JEMMYPATH=${CPAPPEND} CLASSPATH=.${PS}${TESTCLASSES}${PS}${JEMMYPATH} ; export CLASSPATH THIS_DIR=`pwd` ${TESTJAVA}${FS}bin${FS}java ${TESTVMOPTS} -version ${TESTJAVA}${FS}bin${FS}java ${TESTVMOPTS} IsInstanceTest > test.out 2>&1 cat test.out grep "Failed at index" test.out if [ $? = 0 ] then echo "Test Failed" exit 1 else echo "Test Passed" exit 0 fi