5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 // ciBytecodeStream
26 //
27 // The class is used to iterate over the bytecodes of a method.
28 // It hides the details of constant pool structure/access by
29 // providing accessors for constant pool items. It returns only pure
30 // Java bytecodes; VM-internal _fast bytecodes are translated back to
31 // their original form during iteration.
32 class ciBytecodeStream : StackObj {
33 private:
34 // Handling for the weird bytecodes
35 Bytecodes::Code next_wide_or_table(Bytecodes::Code); // Handle _wide & complicated inline table
36
37 static Bytecodes::Code check_java(Bytecodes::Code c) {
38 assert(Bytecodes::is_java_code(c), "should not return _fast bytecodes");
39 return c;
40 }
41
42 static Bytecodes::Code check_defined(Bytecodes::Code c) {
43 assert(Bytecodes::is_defined(c), "");
44 return c;
380 } else if (!_is_exact &&
381 handler->catch_klass()->is_subtype_of(_exception_klass)) {
382 // This catch block may be reachable.
383 return;
384 }
385 }
386
387 // The catch block was not pertinent. Go on.
388 _pos++;
389 }
390 } else {
391 // This is an iteration over all handlers.
392 return;
393 }
394 }
395
396 ciExceptionHandler* handler() {
397 return _method->_exception_handlers[_pos];
398 }
399 };
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5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_CI_CISTREAMS_HPP
26 #define SHARE_VM_CI_CISTREAMS_HPP
27
28 #include "ci/ciClassList.hpp"
29 #include "ci/ciExceptionHandler.hpp"
30 #include "ci/ciInstanceKlass.hpp"
31 #include "ci/ciMethod.hpp"
32 #include "interpreter/bytecode.hpp"
33
34 // ciBytecodeStream
35 //
36 // The class is used to iterate over the bytecodes of a method.
37 // It hides the details of constant pool structure/access by
38 // providing accessors for constant pool items. It returns only pure
39 // Java bytecodes; VM-internal _fast bytecodes are translated back to
40 // their original form during iteration.
41 class ciBytecodeStream : StackObj {
42 private:
43 // Handling for the weird bytecodes
44 Bytecodes::Code next_wide_or_table(Bytecodes::Code); // Handle _wide & complicated inline table
45
46 static Bytecodes::Code check_java(Bytecodes::Code c) {
47 assert(Bytecodes::is_java_code(c), "should not return _fast bytecodes");
48 return c;
49 }
50
51 static Bytecodes::Code check_defined(Bytecodes::Code c) {
52 assert(Bytecodes::is_defined(c), "");
53 return c;
389 } else if (!_is_exact &&
390 handler->catch_klass()->is_subtype_of(_exception_klass)) {
391 // This catch block may be reachable.
392 return;
393 }
394 }
395
396 // The catch block was not pertinent. Go on.
397 _pos++;
398 }
399 } else {
400 // This is an iteration over all handlers.
401 return;
402 }
403 }
404
405 ciExceptionHandler* handler() {
406 return _method->_exception_handlers[_pos];
407 }
408 };
409
410 #endif // SHARE_VM_CI_CISTREAMS_HPP
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