system_cmds-643.30.1.tar.gz

[apple/system_cmds.git] / KDBG / KDThreadMapEntry.hpp

diff --git a/KDBG/KDThreadMapEntry.hpp b/KDBG/KDThreadMapEntry.hpp
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+//
+//  KDThreadMapEntry.hpp
+//  KDBG
+//
+//  Created by James McIlree on 10/25/12.
+//  Copyright (c) 2014 Apple. All rights reserved.
+//
+
+#ifndef kdprof_KDThreadMapEntry_hpp
+#define kdprof_KDThreadMapEntry_hpp
+
+//
+// This is the kd_threadmap from the kernel
+//
+// There is one interesting conflict I have noticed so far.
+//
+// The _pid field is set to 1 for kernel threads that have no user space
+// representation. However, 1 is a valid pid, and in fact, used by launchd.
+//
+// A full disambiguation of entries *must* include the tid, pid, AND name:
+//
+//    000000000000011f 00000001 launchd
+//    000000000000014f 00000001 launchd
+//    0000000000000150 00000001 launchd
+//
+//    0000000000000110 00000001 kernel_task
+//    0000000000000120 00000001 kernel_task
+//    0000000000000133 00000001 kernel_task
+//
+template <typename SIZE>
+class KDThreadMapEntry {
+  protected:
+    typename SIZE::ptr_t       _tid;
+    int32_t                    _pid;
+    char                       _name[20]; // This is process name, not thread name!
+
+  public:
+    typename SIZE::ptr_t tid() const           { return _tid; }
+    int32_t pid() const                                { return _pid; }
+    const char* name() const                   { return _name; }
+};
+
+#endif