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8159129: TestStringIntrinsicRangeChecks fails w/ No exception thrown for compressByte/inflateByte

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Need to convert char offsets to byte offsets before range check.

Reviewed-by: vlivanov
This commit is contained in:
Tobias Hartmann 2016-07-05 07:57:09 +02:00
parent 9ab5f632b5
commit b64a4110b3
2 changed files with 13 additions and 11 deletions
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22
hotspot/src/share/vm/opto/library_call.cpp
View file

@ -1403,18 +1403,20 @@ bool LibraryCallKit::inline_string_copy(bool compress) {
(!compress && src_elem == T_BYTE && (dst_elem == T_BYTE || dst_elem == T_CHAR)),
"Unsupported array types for inline_string_copy");
// Range checks
generate_string_range_check(src, src_offset, length, compress && src_elem == T_BYTE);
generate_string_range_check(dst, dst_offset, length, !compress && dst_elem == T_BYTE);
if (stopped()) {
return true;
// Convert char[] offsets to byte[] offsets
bool convert_src = (compress && src_elem == T_BYTE);
bool convert_dst = (!compress && dst_elem == T_BYTE);
if (convert_src) {
src_offset = _gvn.transform(new LShiftINode(src_offset, intcon(1)));
} else if (convert_dst) {
dst_offset = _gvn.transform(new LShiftINode(dst_offset, intcon(1)));
}
// Convert char[] offsets to byte[] offsets
if (compress && src_elem == T_BYTE) {
src_offset = _gvn.transform(new LShiftINode(src_offset, intcon(1)));
} else if (!compress && dst_elem == T_BYTE) {
dst_offset = _gvn.transform(new LShiftINode(dst_offset, intcon(1)));
// Range checks
generate_string_range_check(src, src_offset, length, convert_src);
generate_string_range_check(dst, dst_offset, length, convert_dst);
if (stopped()) {
return true;
}
Node* src_start = array_element_address(src, src_offset, src_elem);

2
hotspot/test/compiler/intrinsics/string/TestStringIntrinsicRangeChecks.java
View file

@ -30,7 +30,7 @@
* @library /compiler/patches /testlibrary /test/lib /
* @build java.base/java.lang.Helper
* @build compiler.intrinsics.string.TestStringIntrinsicRangeChecks
* @run main compiler.intrinsics.string.TestStringIntrinsicRangeChecks
* @run main/othervm -Xbatch -XX:CompileThreshold=100 -XX:-TieredCompilation compiler.intrinsics.string.TestStringIntrinsicRangeChecks
*/
package compiler.intrinsics.string;