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
26 #include "gc/shenandoah/shenandoahBarrierSetNMethod.hpp"
27 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
28 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
29 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
30 #include "gc/shenandoah/shenandoahLock.hpp"
31 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
32 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
33 #include "memory/iterator.hpp"
34 #include "memory/resourceArea.hpp"
35 #include "runtime/threadWXSetters.inline.hpp"
36
37 bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
38 if (!is_armed(nm)) {
39 // Some other thread got here first and healed the oops
40 // and disarmed the nmethod. No need to continue.
41 return true;
42 }
43
44 ShenandoahNMethodLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
45 assert(lock != nullptr, "Must be");
48 if (!is_armed(nm)) {
49 // Some other thread managed to complete while we were
50 // waiting for lock. No need to continue.
51 return true;
52 }
53
54 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current());)
55
56 if (nm->is_unloading()) {
57 // We don't need to take the lock when unlinking nmethods from
58 // the Method, because it is only concurrently unlinked by
59 // the entry barrier, which acquires the per nmethod lock.
60 nm->unlink_from_method();
61
62 // We can end up calling nmethods that are unloading
63 // since we clear compiled ICs lazily. Returning false
64 // will re-resovle the call and update the compiled IC.
65 return false;
66 }
67
68 // Heal oops
69 ShenandoahNMethod::heal_nmethod(nm);
70
71 // CodeCache unloading support
72 nm->mark_as_maybe_on_stack();
73
74 // Disarm
75 ShenandoahNMethod::disarm_nmethod(nm);
76 return true;
77 }
|
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
26 #include "gc/shenandoah/shenandoahBarrierSetAssembler.hpp"
27 #include "gc/shenandoah/shenandoahBarrierSetNMethod.hpp"
28 #include "gc/shenandoah/shenandoahClosures.inline.hpp"
29 #include "gc/shenandoah/shenandoahCodeRoots.hpp"
30 #include "gc/shenandoah/shenandoahHeap.inline.hpp"
31 #include "gc/shenandoah/shenandoahLock.hpp"
32 #include "gc/shenandoah/shenandoahNMethod.inline.hpp"
33 #include "gc/shenandoah/shenandoahThreadLocalData.hpp"
34 #include "memory/iterator.hpp"
35 #include "memory/resourceArea.hpp"
36 #include "runtime/threadWXSetters.inline.hpp"
37
38 bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
39 if (!is_armed(nm)) {
40 // Some other thread got here first and healed the oops
41 // and disarmed the nmethod. No need to continue.
42 return true;
43 }
44
45 ShenandoahNMethodLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
46 assert(lock != nullptr, "Must be");
49 if (!is_armed(nm)) {
50 // Some other thread managed to complete while we were
51 // waiting for lock. No need to continue.
52 return true;
53 }
54
55 MACOS_AARCH64_ONLY(ThreadWXEnable wx(WXWrite, Thread::current());)
56
57 if (nm->is_unloading()) {
58 // We don't need to take the lock when unlinking nmethods from
59 // the Method, because it is only concurrently unlinked by
60 // the entry barrier, which acquires the per nmethod lock.
61 nm->unlink_from_method();
62
63 // We can end up calling nmethods that are unloading
64 // since we clear compiled ICs lazily. Returning false
65 // will re-resovle the call and update the compiled IC.
66 return false;
67 }
68
69 bool code_changed = false;
70
71 // Heal oops
72 ShenandoahNMethod::heal_nmethod(nm);
73
74 // Update barriers
75 code_changed |= ShenandoahNMethod::update_barriers(nm);
76
77 // CodeCache unloading support
78 nm->mark_as_maybe_on_stack();
79
80 // Invalidate the entire nmethod once.
81 if (code_changed) {
82 ICache::invalidate_range(nm->code_begin(), nm->code_size());
83 }
84
85 // Disarm
86 ShenandoahNMethod::disarm_nmethod(nm);
87 return true;
88 }
89
90 void ShenandoahBarrierSetNMethod::patch_barrier_relocation(patchable_barrier_Relocation* reloc) {
91 #ifdef COMPILER2
92 if (reloc->target_offset() != 0) {
93 // Already set. This is likely nmethod relocation path, so just trust the existing relocation.
94 return;
95 }
96
97 address pc = reloc->addr();
98 address target = ShenandoahBarrierSetAssembler::parse_stub_address(pc);
99 reloc->set_target_offset(target - pc);
100 #endif
101 }
102
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