--- a/hotspot/src/share/vm/gc/shared/memset_with_concurrent_readers.cpp Fri Sep 02 00:08:18 2016 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,104 +0,0 @@
-/*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-#include "precompiled.hpp"
-
-#include <string.h>
-#include "gc/shared/memset_with_concurrent_readers.hpp"
-#include "utilities/debug.hpp"
-#include "utilities/globalDefinitions.hpp"
-#include "utilities/macros.hpp"
-#include "utilities/ostream.hpp"
-
-#if INCLUDE_ALL_GCS
-
-// Unit test
-#ifndef PRODUCT
-
-static unsigned line_byte(const char* line, size_t i) {
- return unsigned(line[i]) & 0xFF;
-}
-
-// Verify memset_with_concurrent_readers mimics memset.
-// We don't attempt to verify the concurrent reader case.
-void test_memset_with_concurrent_readers() {
- const size_t chunk_size = 8 * BytesPerWord;
- const unsigned chunk_count = 4;
- const size_t block_size = (chunk_count + 4) * chunk_size;
- char block[block_size];
- char clear_block[block_size];
- char set_block[block_size];
-
- // block format:
- // 0: unused leading chunk
- // 1: chunk written from start index to end of chunk
- // ... nchunks fully written chunks
- // N: chunk written from start of chunk to end index
- // N+1: unused trailing chunk
-
- const int clear_value = 0;
- const int set_value = 0xAC;
-
- memset(clear_block, clear_value, block_size);
- memset(set_block, set_value, block_size);
-
- for (unsigned nchunks = 0; nchunks <= chunk_count; ++nchunks) {
- for (size_t start = 1; start <= chunk_size; ++start) {
- for (size_t end = 0; end <= chunk_size; ++end) {
- size_t set_start = chunk_size + start;
- size_t set_end = (2 + nchunks) * chunk_size + end;
- size_t set_size = set_end - set_start;
-
- memset(block, clear_value, block_size);
- memset_with_concurrent_readers(&block[set_start], set_value, set_size);
- bool head_clear = !memcmp(clear_block, block, set_start);
- bool middle_set = !memcmp(set_block, block + set_start, set_size);
- bool tail_clear = !memcmp(clear_block, block + set_end, block_size - set_end);
- if (!(head_clear && middle_set && tail_clear)) {
- tty->print_cr("*** memset_with_concurrent_readers failed: "
- "set start " SIZE_FORMAT ", set end " SIZE_FORMAT,
- set_start, set_end);
- for (unsigned chunk = 0; chunk < (block_size / chunk_size); ++chunk) {
- for (unsigned line = 0; line < (chunk_size / BytesPerWord); ++line) {
- const char* lp = &block[chunk * chunk_size + line * BytesPerWord];
- tty->print_cr("%d,%d: %2x %2x %2x %2x %2x %2x %2x %2x",
- chunk, line,
- line_byte(lp, 0), line_byte(lp, 1),
- line_byte(lp, 2), line_byte(lp, 3),
- line_byte(lp, 4), line_byte(lp, 5),
- line_byte(lp, 6), line_byte(lp, 7));
- }
- }
- assert(head_clear, "leading byte not clear");
- assert(middle_set, "memset byte not set");
- assert(tail_clear, "trailing bye not clear");
- }
- }
- }
- }
-}
-
-#endif // end unit test
-
-#endif // INCLUDE_ALL_GCS
--- a/hotspot/src/share/vm/utilities/internalVMTests.cpp Fri Sep 02 00:08:18 2016 +0000
+++ b/hotspot/src/share/vm/utilities/internalVMTests.cpp Fri Sep 02 01:39:47 2016 +0000
@@ -93,7 +93,6 @@
run_unit_test(FreeRegionList_test);
run_unit_test(IHOP_test);
}
- run_unit_test(test_memset_with_concurrent_readers);
run_unit_test(WorkerDataArray_test);
run_unit_test(ParallelCompact_test);
#endif
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/native/gc/shared/test_memset_with_concurrent_readers.cpp Fri Sep 02 01:39:47 2016 +0000
@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "precompiled.hpp"
+#include <string.h>
+#include "utilities/globalDefinitions.hpp"
+#include <sstream>
+#include "gc/shared/memset_with_concurrent_readers.hpp"
+#include "unittest.hpp"
+
+#if INCLUDE_ALL_GCS
+
+static unsigned line_byte(const char* line, size_t i) {
+ return unsigned(line[i]) & 0xFF;
+}
+
+TEST(gc, memset_with_concurrent_readers) {
+ const size_t chunk_size = 8 * BytesPerWord;
+ const unsigned chunk_count = 4;
+ const size_t block_size = (chunk_count + 4) * chunk_size;
+ char block[block_size];
+ char clear_block[block_size];
+ char set_block[block_size];
+
+ // block format:
+ // 0: unused leading chunk
+ // 1: chunk written from start index to end of chunk
+ // ... nchunks fully written chunks
+ // N: chunk written from start of chunk to end index
+ // N+1: unused trailing chunk
+
+ const int clear_value = 0;
+ const int set_value = 0xAC;
+
+ memset(clear_block, clear_value, block_size);
+ memset(set_block, set_value, block_size);
+
+ for (unsigned nchunks = 0; nchunks <= chunk_count; ++nchunks) {
+ for (size_t start = 1; start <= chunk_size; ++start) {
+ for (size_t end = 0; end <= chunk_size; ++end) {
+ size_t set_start = chunk_size + start;
+ size_t set_end = (2 + nchunks) * chunk_size + end;
+ size_t set_size = set_end - set_start;
+
+ memset(block, clear_value, block_size);
+ memset_with_concurrent_readers(&block[set_start], set_value, set_size);
+ bool head_clear = !memcmp(clear_block, block, set_start);
+ bool middle_set = !memcmp(set_block, block + set_start, set_size);
+ bool tail_clear = !memcmp(clear_block, block + set_end, block_size - set_end);
+ if (!(head_clear && middle_set && tail_clear)) {
+ std::ostringstream err_stream;
+ err_stream << "*** memset_with_concurrent_readers failed: set start "
+ << set_start << ", set end " << set_end << std::endl;
+ for (unsigned chunk = 0; chunk < (block_size / chunk_size); ++chunk) {
+ for (unsigned line = 0; line < (chunk_size / BytesPerWord); ++line) {
+
+ const char* lp = &block[chunk * chunk_size + line * BytesPerWord];
+
+ err_stream << std::dec << chunk << "," << line << ": " << std::hex
+ << std::setw(2) << line_byte(lp, 0) << " "
+ << std::setw(2) << line_byte(lp, 1) << " "
+ << std::setw(2) << line_byte(lp, 2) << " "
+ << std::setw(2) << line_byte(lp, 3) << " "
+ << std::setw(2) << line_byte(lp, 4) << " "
+ << std::setw(2) << line_byte(lp, 5) << " "
+ << std::setw(2) << line_byte(lp, 6) << " "
+ << std::setw(2) << line_byte(lp, 7) << std::endl;
+ }
+ }
+ EXPECT_TRUE(head_clear) << "leading byte not clear";
+ EXPECT_TRUE(middle_set) << "memset byte not set";
+ EXPECT_TRUE(tail_clear) << "trailing bye not clear";
+ ASSERT_TRUE(head_clear && middle_set && tail_clear) << err_stream.str();
+ }
+ }
+ }
+ }
+}
+#endif