Mercurial > hg > truffle
annotate src/os/linux/vm/osThread_linux.hpp @ 1762:0878d7bae69f
6961697: move nmethod constants section before instruction section
Summary: This is a preparation for 6961690.
Reviewed-by: kvn, never
author | twisti |
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date | Fri, 27 Aug 2010 01:51:27 -0700 |
parents | c18cbe5936b8 |
children | f95d63e2154a |
rev | line source |
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0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 private: | |
26 int _thread_type; | |
27 | |
28 public: | |
29 | |
30 int thread_type() const { | |
31 return _thread_type; | |
32 } | |
33 void set_thread_type(int type) { | |
34 _thread_type = type; | |
35 } | |
36 | |
37 private: | |
38 | |
39 // _thread_id is kernel thread id (similar to LWP id on Solaris). Each | |
40 // thread has a unique thread_id (LinuxThreads or NPTL). It can be used | |
41 // to access /proc. | |
42 pid_t _thread_id; | |
43 | |
44 // _pthread_id is the pthread id, which is used by library calls | |
45 // (e.g. pthread_kill). | |
46 pthread_t _pthread_id; | |
47 | |
48 sigset_t _caller_sigmask; // Caller's signal mask | |
49 | |
50 public: | |
51 | |
52 // Methods to save/restore caller's signal mask | |
53 sigset_t caller_sigmask() const { return _caller_sigmask; } | |
54 void set_caller_sigmask(sigset_t sigmask) { _caller_sigmask = sigmask; } | |
55 | |
56 pid_t thread_id() const { | |
57 return _thread_id; | |
58 } | |
59 #ifndef PRODUCT | |
60 // Used for debugging, return a unique integer for each thread. | |
61 int thread_identifier() const { return _thread_id; } | |
62 #endif | |
63 #ifdef ASSERT | |
64 // We expect no reposition failures so kill vm if we get one. | |
65 // | |
66 bool valid_reposition_failure() { | |
67 return false; | |
68 } | |
69 #endif // ASSERT | |
70 void set_thread_id(pid_t id) { | |
71 _thread_id = id; | |
72 } | |
73 pthread_t pthread_id() const { | |
74 return _pthread_id; | |
75 } | |
76 void set_pthread_id(pthread_t tid) { | |
77 _pthread_id = tid; | |
78 } | |
79 | |
80 // *************************************************************** | |
81 // suspension support. | |
82 // *************************************************************** | |
83 | |
84 public: | |
85 // flags that support signal based suspend/resume on Linux are in a | |
86 // separate class to avoid confusion with many flags in OSThread that | |
87 // are used by VM level suspend/resume. | |
88 os::Linux::SuspendResume sr; | |
89 | |
90 // _ucontext and _siginfo are used by SR_handler() to save thread context, | |
91 // and they will later be used to walk the stack or reposition thread PC. | |
92 // If the thread is not suspended in SR_handler() (e.g. self suspend), | |
93 // the value in _ucontext is meaningless, so we must use the last Java | |
94 // frame information as the frame. This will mean that for threads | |
95 // that are parked on a mutex the profiler (and safepoint mechanism) | |
96 // will see the thread as if it were still in the Java frame. This | |
97 // not a problem for the profiler since the Java frame is a close | |
98 // enough result. For the safepoint mechanism when the give it the | |
99 // Java frame we are not at a point where the safepoint needs the | |
100 // frame to that accurate (like for a compiled safepoint) since we | |
101 // should be in a place where we are native and will block ourselves | |
102 // if we transition. | |
103 private: | |
104 void* _siginfo; | |
105 ucontext_t* _ucontext; | |
106 int _expanding_stack; /* non zero if manually expanding stack */ | |
107 address _alt_sig_stack; /* address of base of alternate signal stack */ | |
108 | |
109 public: | |
110 void* siginfo() const { return _siginfo; } | |
111 void set_siginfo(void* ptr) { _siginfo = ptr; } | |
112 ucontext_t* ucontext() const { return _ucontext; } | |
113 void set_ucontext(ucontext_t* ptr) { _ucontext = ptr; } | |
114 void set_expanding_stack(void) { _expanding_stack = 1; } | |
115 void clear_expanding_stack(void) { _expanding_stack = 0; } | |
116 int expanding_stack(void) { return _expanding_stack; } | |
117 | |
118 void set_alt_sig_stack(address val) { _alt_sig_stack = val; } | |
119 address alt_sig_stack(void) { return _alt_sig_stack; } | |
120 | |
121 private: | |
122 Monitor* _startThread_lock; // sync parent and child in thread creation | |
123 | |
124 public: | |
125 | |
126 Monitor* startThread_lock() const { | |
127 return _startThread_lock; | |
128 } | |
129 | |
130 // *************************************************************** | |
131 // Platform dependent initialization and cleanup | |
132 // *************************************************************** | |
133 | |
134 private: | |
135 | |
136 void pd_initialize(); | |
137 void pd_destroy(); | |
138 | |
139 // Reconciliation History | |
140 // osThread_solaris.hpp 1.24 99/08/27 13:11:54 | |
141 // End |