8244719: CTW: C2 compilation fails with "assert(!VerifyHashTableKeys || _hash_lock == 0) failed: remove node from hash table before modifying it"
Fix Parse::Block::init_graph() to also count predecessors for exception blocks because they can have a direct bytecode jump to them resulting in this assertion failure. Reviewed-by: kvn, thartmann
This commit is contained in:
Christian Hagedorn
parent
847a3baca8
commit
bf22f82207
src/hotspot/share/opto
test/hotspot/jtreg/compiler/parsing
@ -1293,9 +1293,11 @@ void Parse::Block::init_graph(Parse* outer) {
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_successors[i] = block2;
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// Accumulate pred info for the other block, too.
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if (i < ns) {
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block2->_pred_count++;
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} else {
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// Note: We also need to set _pred_count for exception blocks since they could
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// also have normal predecessors (reached without athrow by an explicit jump).
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// This also means that next_path_num can be called along exception paths.
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block2->_pred_count++;
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if (i >= ns) {
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block2->_is_handler = true;
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}
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@ -1310,10 +1312,6 @@ void Parse::Block::init_graph(Parse* outer) {
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}
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#endif
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}
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// Note: We never call next_path_num along exception paths, so they
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// never get processed as "ready". Also, the input phis of exception
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// handlers get specially processed, so that
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}
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//---------------------------successor_for_bci---------------------------------
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@ -0,0 +1,174 @@
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/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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super public class compiler/parsing/TestExceptionBlockWithPredecessors
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version 59:0
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{
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Field loopCounter:I;
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Field switchOn:I;
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Field iFld:I;
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public Method "<init>":"()V"
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stack 1 locals 1
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{
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aload_0;
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invokespecial Method java/lang/Object."<init>":"()V";
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return;
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}
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Method test:"()V"
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stack 4 locals 2
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{
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try t0, t1;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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aload_0;
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getfield Field switchOn:"I";
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tableswitch{ //1 to 3
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1: L32;
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2: L53;
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3: L57;
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default: L67 };
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L32: stack_frame_type same;
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aload_0;
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getfield Field loopCounter:"I";
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bipush 10;
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if_icmpge L67;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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L53: stack_frame_type same;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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L57: stack_frame_type same;
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aload_0;
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dup;
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getfield Field loopCounter:"I";
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iconst_1;
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iadd;
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putfield Field loopCounter:"I";
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goto L32;
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endtry t0, t1;
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L67: stack_frame_type same;
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goto L74;
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catch t0 java/lang/RuntimeException;
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stack_frame_type stack1;
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stack_map class java/lang/RuntimeException;
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astore_1;
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aload_1;
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aload_0;
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getfield Field loopCounter:"I";
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bipush 10;
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if_icmpge L70;
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aload_0;
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dup;
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getfield Field loopCounter:"I";
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iconst_1;
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iadd;
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putfield Field loopCounter:"I";
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goto L70;
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catch t1 java/lang/Throwable;
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L70: stack_frame_type stack1;
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stack_map class java/lang/Throwable;
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astore_1;
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L74: stack_frame_type same;
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return;
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}
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Method testWorksWithoutPreds:"()V"
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stack 4 locals 2
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{
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try t0, t1;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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aload_0;
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getfield Field switchOn:"I";
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tableswitch{ //1 to 3
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1: L32; // No profile information about it. Never taken. Skip on it in first iteration in do_all_blocks()
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2: L53;
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3: L57;
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default: L67 };
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L32: stack_frame_type same; // Only parsed in second iteration of do_all_blocks(), when both exception handler blocks are already parsed
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aload_0;
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getfield Field loopCounter:"I";
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bipush 10;
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if_icmpge L67;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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aload_0;
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getfield Field iFld:"I";
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bipush 10;
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if_icmpeq L53;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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L52: stack_frame_type same;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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L53: stack_frame_type same;
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aload_0;
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invokevirtual Method dontInlineThrow:"()V";
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L57: stack_frame_type same;
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aload_0;
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dup;
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getfield Field loopCounter:"I";
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iconst_1;
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iadd;
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putfield Field loopCounter:"I";
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goto L32; // Only merge block starting at that bytecode which has a smaller rpo than this block -> process in next iteration in do_all_blocks()
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endtry t0, t1;
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L67: stack_frame_type same;
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goto L74;
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catch t0 java/lang/RuntimeException;
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stack_frame_type stack1;
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stack_map class java/lang/RuntimeException;
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astore_1;
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aload_0;
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getfield Field loopCounter:"I";
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bipush 10;
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if_icmpge L74;
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aload_0;
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dup;
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getfield Field loopCounter:"I";
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iconst_1;
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iadd;
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putfield Field loopCounter:"I";
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goto L74;
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catch t1 java/lang/Throwable;
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L70: stack_frame_type stack1;
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stack_map class java/lang/Throwable;
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astore_1;
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L74: stack_frame_type same;
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return;
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}
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public Method dontInlineThrow:"()V"
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throws java/lang/RuntimeException
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stack 0 locals 1
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{
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return;
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}
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} // end Class TestExceptionBlockWithPredecessors
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@ -0,0 +1,46 @@
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/*
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* Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8244719
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* @summary Tests custom bytecode with an explicit entry (fall through or jump) to an exception block which was unexpected for C2 parsing.
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*
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* @compile TestExceptionBlockWithPredecessors.jasm
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* @run main/othervm -Xbatch -XX:CompileCommand=dontinline,compiler.parsing.TestExceptionBlockWithPredecessors::*
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* compiler.parsing.TestExceptionBlockWithPredecessorsMain
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*/
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package compiler.parsing;
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public class TestExceptionBlockWithPredecessorsMain {
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public static void main(String[] args) {
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TestExceptionBlockWithPredecessors t = new TestExceptionBlockWithPredecessors();
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for (int i = 0; i < 10000; i++) {
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t.loopCounter = (i % 2 == 0) ? 0 : 10;
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t.switchOn = (i % 2 == 0) ? 2 : 3;
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t.test(); // Triggers assertion failure
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t.testWorksWithoutPreds(); // Works since no predecessors for exception handler
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}
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}
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}
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