Mercurial > hg > truffle
annotate src/share/vm/runtime/osThread.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | c18cbe5936b8 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 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 |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 // The OSThread class holds OS-specific thread information. It is equivalent | |
| 26 // to the sys_thread_t structure of the classic JVM implementation. | |
| 27 | |
| 28 // The thread states represented by the ThreadState values are platform-specific | |
| 29 // and are likely to be only approximate, because most OSes don't give you access | |
| 30 // to precise thread state information. | |
| 31 | |
| 32 // Note: the ThreadState is legacy code and is not correctly implemented. | |
| 33 // Uses of ThreadState need to be replaced by the state in the JavaThread. | |
| 34 | |
| 35 enum ThreadState { | |
| 36 ALLOCATED, // Memory has been allocated but not initialized | |
| 37 INITIALIZED, // The thread has been initialized but yet started | |
| 38 RUNNABLE, // Has been started and is runnable, but not necessarily running | |
| 39 MONITOR_WAIT, // Waiting on a contended monitor lock | |
| 40 CONDVAR_WAIT, // Waiting on a condition variable | |
| 41 OBJECT_WAIT, // Waiting on an Object.wait() call | |
| 42 BREAKPOINTED, // Suspended at breakpoint | |
| 43 SLEEPING, // Thread.sleep() | |
| 44 ZOMBIE // All done, but not reclaimed yet | |
| 45 }; | |
| 46 | |
| 47 // I'd make OSThread a ValueObj embedded in Thread to avoid an indirection, but | |
| 48 // the assembler test in java.cpp expects that it can install the OSThread of | |
| 49 // the main thread into its own Thread at will. | |
| 50 | |
| 51 | |
| 52 class OSThread: public CHeapObj { | |
| 53 friend class VMStructs; | |
| 54 private: | |
| 55 //void* _start_proc; // Thread start routine | |
| 56 OSThreadStartFunc _start_proc; // Thread start routine | |
| 57 void* _start_parm; // Thread start routine parameter | |
| 58 volatile ThreadState _state; // Thread state *hint* | |
| 59 jint _interrupted; // Thread.isInterrupted state | |
| 60 | |
| 61 // Note: _interrupted must be jint, so that Java intrinsics can access it. | |
| 62 // The value stored there must be either 0 or 1. It must be possible | |
| 63 // for Java to emulate Thread.currentThread().isInterrupted() by performing | |
| 64 // the double indirection Thread::current()->_osthread->_interrupted. | |
| 65 | |
| 66 // Methods | |
| 67 public: | |
| 68 void set_state(ThreadState state) { _state = state; } | |
| 69 ThreadState get_state() { return _state; } | |
| 70 | |
| 71 // Constructor | |
| 72 OSThread(OSThreadStartFunc start_proc, void* start_parm); | |
| 73 | |
| 74 // Destructor | |
| 75 ~OSThread(); | |
| 76 | |
| 77 // Accessors | |
| 78 OSThreadStartFunc start_proc() const { return _start_proc; } | |
| 79 void set_start_proc(OSThreadStartFunc start_proc) { _start_proc = start_proc; } | |
| 80 void* start_parm() const { return _start_parm; } | |
| 81 void set_start_parm(void* start_parm) { _start_parm = start_parm; } | |
| 82 | |
| 83 bool interrupted() const { return _interrupted != 0; } | |
| 84 void set_interrupted(bool z) { _interrupted = z ? 1 : 0; } | |
| 85 | |
| 86 // Printing | |
| 87 void print_on(outputStream* st) const; | |
| 88 void print() const { print_on(tty); } | |
| 89 | |
| 90 // For java intrinsics: | |
| 91 static ByteSize interrupted_offset() { return byte_offset_of(OSThread, _interrupted); } | |
| 92 | |
| 93 // Platform dependent stuff | |
| 94 #include "incls/_osThread_pd.hpp.incl" | |
| 95 }; | |
| 96 | |
| 97 | |
| 98 // Utility class for use with condition variables: | |
| 99 class OSThreadWaitState : public StackObj { | |
| 100 OSThread* _osthread; | |
| 101 ThreadState _old_state; | |
| 102 public: | |
| 103 OSThreadWaitState(OSThread* osthread, bool is_object_wait) { | |
| 104 _osthread = osthread; | |
| 105 _old_state = osthread->get_state(); | |
| 106 if (is_object_wait) { | |
| 107 osthread->set_state(OBJECT_WAIT); | |
| 108 } else { | |
| 109 osthread->set_state(CONDVAR_WAIT); | |
| 110 } | |
| 111 } | |
| 112 ~OSThreadWaitState() { | |
| 113 _osthread->set_state(_old_state); | |
| 114 } | |
| 115 }; | |
| 116 | |
| 117 | |
| 118 // Utility class for use with contended monitors: | |
| 119 class OSThreadContendState : public StackObj { | |
| 120 OSThread* _osthread; | |
| 121 ThreadState _old_state; | |
| 122 public: | |
| 123 OSThreadContendState(OSThread* osthread) { | |
| 124 _osthread = osthread; | |
| 125 _old_state = osthread->get_state(); | |
| 126 osthread->set_state(MONITOR_WAIT); | |
| 127 } | |
| 128 ~OSThreadContendState() { | |
| 129 _osthread->set_state(_old_state); | |
| 130 } | |
| 131 }; |