10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef OS_AIX_VM_OSTHREAD_AIX_HPP
27 #define OS_AIX_VM_OSTHREAD_AIX_HPP
28
29 public:
30 typedef pid_t thread_id_t;
31
32 private:
33 int _thread_type;
34
35 public:
36
37 int thread_type() const {
38 return _thread_type;
39 }
40 void set_thread_type(int type) {
41 _thread_type = type;
42 }
43
44 private:
45
46 // _pthread_id is the pthread id, which is used by library calls
47 // (e.g. pthread_kill).
48 pthread_t _pthread_id;
49
50 sigset_t _caller_sigmask; // Caller's signal mask
51
52 public:
53
54 // Methods to save/restore caller's signal mask
55 sigset_t caller_sigmask() const { return _caller_sigmask; }
56 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
57
58 #ifndef PRODUCT
59 // Used for debugging, return a unique integer for each thread.
60 int thread_identifier() const { return _thread_id; }
61 #endif
62 #ifdef ASSERT
63 // We expect no reposition failures so kill vm if we get one.
64 //
65 bool valid_reposition_failure() {
66 return false;
67 }
68 #endif // ASSERT
69 pthread_t pthread_id() const {
70 return _pthread_id;
71 }
72 void set_pthread_id(pthread_t tid) {
73 _pthread_id = tid;
74 }
75
76 // ***************************************************************
77 // suspension support.
78 // ***************************************************************
79
80 public:
81 // flags that support signal based suspend/resume on Linux are in a
82 // separate class to avoid confusion with many flags in OSThread that
83 // are used by VM level suspend/resume.
84 os::SuspendResume sr;
85
86 // _ucontext and _siginfo are used by SR_handler() to save thread context,
87 // and they will later be used to walk the stack or reposition thread PC.
88 // If the thread is not suspended in SR_handler() (e.g. self suspend),
89 // the value in _ucontext is meaningless, so we must use the last Java
90 // frame information as the frame. This will mean that for threads
91 // that are parked on a mutex the profiler (and safepoint mechanism)
92 // will see the thread as if it were still in the Java frame. This
93 // not a problem for the profiler since the Java frame is a close
|
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 *
24 */
25
26 #ifndef OS_AIX_VM_OSTHREAD_AIX_HPP
27 #define OS_AIX_VM_OSTHREAD_AIX_HPP
28
29 public:
30 typedef pthread_t thread_id_t;
31
32 private:
33 int _thread_type;
34
35 public:
36
37 int thread_type() const {
38 return _thread_type;
39 }
40 void set_thread_type(int type) {
41 _thread_type = type;
42 }
43
44 private:
45
46 // On AIX, we use the pthread id as OSThread::thread_id and keep the kernel thread id
47 // separately for diagnostic purposes.
48 //
49 // Note: this kernel thread id is saved at thread start. Depending on the
50 // AIX scheduling mode, this may not be the current thread id (usually not
51 // a problem though as we run with AIXTHREAD_SCOPE=S).
52 tid_t _kernel_thread_id;
53
54 sigset_t _caller_sigmask; // Caller's signal mask
55
56 public:
57
58 // Methods to save/restore caller's signal mask
59 sigset_t caller_sigmask() const { return _caller_sigmask; }
60 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; }
61
62 #ifndef PRODUCT
63 // Used for debugging, return a unique integer for each thread.
64 int thread_identifier() const { return _thread_id; }
65 #endif
66 #ifdef ASSERT
67 // We expect no reposition failures so kill vm if we get one.
68 //
69 bool valid_reposition_failure() {
70 return false;
71 }
72 #endif // ASSERT
73 tid_t kernel_thread_id() const {
74 return _kernel_thread_id;
75 }
76 void set_kernel_thread_id(tid_t tid) {
77 _kernel_thread_id = tid;
78 }
79
80 pthread_t pthread_id() const {
81 // Here: same as OSThread::thread_id()
82 return _thread_id;
83 }
84
85 // ***************************************************************
86 // suspension support.
87 // ***************************************************************
88
89 public:
90 // flags that support signal based suspend/resume on Linux are in a
91 // separate class to avoid confusion with many flags in OSThread that
92 // are used by VM level suspend/resume.
93 os::SuspendResume sr;
94
95 // _ucontext and _siginfo are used by SR_handler() to save thread context,
96 // and they will later be used to walk the stack or reposition thread PC.
97 // If the thread is not suspended in SR_handler() (e.g. self suspend),
98 // the value in _ucontext is meaningless, so we must use the last Java
99 // frame information as the frame. This will mean that for threads
100 // that are parked on a mutex the profiler (and safepoint mechanism)
101 // will see the thread as if it were still in the Java frame. This
102 // not a problem for the profiler since the Java frame is a close
|