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_CODE_CODEBLOB_HPP
26 #define SHARE_VM_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/oopMap.hpp"
30 #include "runtime/frame.hpp"
31 #include "runtime/handles.hpp"
32
33 // CodeBlob - superclass for all entries in the CodeCache.
34 //
35 // Suptypes are:
36 // nmethod : Compiled Java methods (include method that calls to native code)
37 // RuntimeStub : Call to VM runtime methods
38 // DeoptimizationBlob : Used for deoptimizatation
39 // ExceptionBlob : Used for stack unrolling
40 // SafepointBlob : Used to handle illegal instruction exceptions
41 //
42 //
43 // Layout:
44 // - header
45 // - relocation
46 // - content space
47 // - instruction space
48 // - data space
49 class DeoptimizationBlob;
50
51 class CodeBlob VALUE_OBJ_CLASS_SPEC {
52
368 int frame_size
369 );
370
371 public:
372 // Creation
373 static DeoptimizationBlob* create(
374 CodeBuffer* cb,
375 OopMapSet* oop_maps,
376 int unpack_offset,
377 int unpack_with_exception_offset,
378 int unpack_with_reexecution_offset,
379 int frame_size
380 );
381
382 // Typing
383 bool is_deoptimization_stub() const { return true; }
384 bool exception_address_is_unpack_entry(address pc) const {
385 address unpack_pc = unpack();
386 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
387 }
388
389
390
391
392 // GC for args
393 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
394
395 // Printing
396 void print_value_on(outputStream* st) const;
397
398 address unpack() const { return code_begin() + _unpack_offset; }
399 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
400 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
401
402 // Alternate entry point for C1 where the exception and issuing pc
403 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
404 // instead of being in registers. This is needed because C1 doesn't
405 // model exception paths in a way that keeps these registers free so
406 // there may be live values in those registers during deopt.
407 void set_unpack_with_exception_in_tls_offset(int offset) {
408 _unpack_with_exception_in_tls = offset;
409 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
410 }
|
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_CODE_CODEBLOB_HPP
26 #define SHARE_VM_CODE_CODEBLOB_HPP
27
28 #include "asm/codeBuffer.hpp"
29 #include "compiler/oopMap.hpp"
30 #include "runtime/frame.hpp"
31 #include "runtime/handles.hpp"
32
33 // CodeBlob Types
34 // Used in the CodeCache to assign CodeBlobs to different CodeHeaps
35 struct CodeBlobType {
36 enum {
37 MethodNoProfile = 0, // Tier 1 and tier 4 methods (including native methods)
38 MethodProfile = 1, // Tier 2 and Tier 3 methods with profile information
39 NonMethod = 2 // Non-methods like Buffers, Adapters and Runtime Stubs
40 };
41 };
42
43 // CodeBlob - superclass for all entries in the CodeCache.
44 //
45 // Suptypes are:
46 // nmethod : Compiled Java methods (include method that calls to native code)
47 // RuntimeStub : Call to VM runtime methods
48 // DeoptimizationBlob : Used for deoptimizatation
49 // ExceptionBlob : Used for stack unrolling
50 // SafepointBlob : Used to handle illegal instruction exceptions
51 //
52 //
53 // Layout:
54 // - header
55 // - relocation
56 // - content space
57 // - instruction space
58 // - data space
59 class DeoptimizationBlob;
60
61 class CodeBlob VALUE_OBJ_CLASS_SPEC {
62
378 int frame_size
379 );
380
381 public:
382 // Creation
383 static DeoptimizationBlob* create(
384 CodeBuffer* cb,
385 OopMapSet* oop_maps,
386 int unpack_offset,
387 int unpack_with_exception_offset,
388 int unpack_with_reexecution_offset,
389 int frame_size
390 );
391
392 // Typing
393 bool is_deoptimization_stub() const { return true; }
394 bool exception_address_is_unpack_entry(address pc) const {
395 address unpack_pc = unpack();
396 return (pc == unpack_pc || (pc + frame::pc_return_offset) == unpack_pc);
397 }
398
399 // GC for args
400 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, OopClosure* f) { /* Nothing to do */ }
401
402 // Printing
403 void print_value_on(outputStream* st) const;
404
405 address unpack() const { return code_begin() + _unpack_offset; }
406 address unpack_with_exception() const { return code_begin() + _unpack_with_exception; }
407 address unpack_with_reexecution() const { return code_begin() + _unpack_with_reexecution; }
408
409 // Alternate entry point for C1 where the exception and issuing pc
410 // are in JavaThread::_exception_oop and JavaThread::_exception_pc
411 // instead of being in registers. This is needed because C1 doesn't
412 // model exception paths in a way that keeps these registers free so
413 // there may be live values in those registers during deopt.
414 void set_unpack_with_exception_in_tls_offset(int offset) {
415 _unpack_with_exception_in_tls = offset;
416 assert(code_contains(code_begin() + _unpack_with_exception_in_tls), "must be PC inside codeblob");
417 }
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