Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/debugger/ThreadAccess.java @ 1913:3b2dea75431e
6984311: JSR 292 needs optional bootstrap method parameters
Summary: Allow CONSTANT_InvokeDynamic nodes to have any number of extra operands.
Reviewed-by: twisti
| author | jrose |
|---|---|
| date | Sat, 30 Oct 2010 13:08:23 -0700 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
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| 0 | 1 /* |
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| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
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| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
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| 15 * You should have received a copy of the GNU General Public License version | |
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| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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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 package sun.jvm.hotspot.debugger; | |
| 26 | |
| 27 /** <P> This interface abstracts over access to operating system-level | |
| 28 threads in the underlying process. It is designed to be minimal | |
| 29 and generic to allow cross-platform compatibility. </P> | |
| 30 | |
| 31 <P> The basic operation this interface supports is creating a | |
| 32 sun.jvm.hotspot.debugger.ThreadProxy "token" for an existing | |
| 33 thread. As an example, the HotSpot VM contains a list of Java | |
| 34 threads, encapsulated in VM-specific JavaThread objects. Each of | |
| 35 these contains a platform-dependent field with the OS-level thread | |
| 36 identifier; on Solaris, this field's type is "thread_t", while on | |
| 37 Windows, it is HANDLE. It is necessary to be able to map from | |
| 38 these fields to a ThreadProxy object, in particular to be able to | |
| 39 get the thread's context. However, since the types of these fields | |
| 40 vary greatly from OS to OS (some use integers as thread IDs, some | |
| 41 use pointers as thread handles) it is not possible to define one | |
| 42 particular type (Address, long) in this interface as the lookup | |
| 43 "key" for a Thread. </P> | |
| 44 | |
| 45 <P> For this reason this mapping mechanism takes the Address of | |
| 46 the memory location containing the thread identifier. On Solaris, | |
| 47 this is the address of a location containing a thread_t; on | |
| 48 Windows, this is the address of a location containing a HANDLE for | |
| 49 a thread. On Linux, this is the address of a location containing a | |
| 50 pthread_t.</P> | |
| 51 | |
| 52 <P> The {@link sun.jvm.hotspot.debugger.cdbg.CDebugger} interface | |
| 53 provides access to the entire thread list of the target process, | |
| 54 but this is optional functionality not required to get the SA to | |
| 55 work. </P> */ | |
| 56 | |
| 57 public interface ThreadAccess { | |
| 58 /** Gets an abstract ThreadProxy object for the thread identified by | |
| 59 the contents of the memory location pointed to by addr. The | |
| 60 contents at location addr are inherently platform-dependent; see | |
| 61 the documentation for this class for more information. FIXME: | |
| 62 what exception, if any, should this throw? */ | |
| 63 public ThreadProxy getThreadForIdentifierAddress(Address addr); | |
| 64 | |
| 65 /** Gets an abstract ThreadProxy object for the thread identified by | |
| 66 id or handle that is platform dependent */ | |
| 67 public ThreadProxy getThreadForThreadId(long id); | |
| 68 } |