src/introspection/introspection_internal.h

   1 #ifndef __PLATFORM_INTROSPECTION_INTERNAL_H__
   2 #define __PLATFORM_INTROSPECTION_INTERNAL_H__
   3
   4
   5 // Task Allocations (with 4K vm_page_size)
   6 //
   7 // Page 1                              Page 2
   8 // +----------------+ <---- Head ----- +----------------+
   9 // | Header         | ----- Next ----> | Header         |  ----- Next ----> ...
  10 // +----------------+                  +----------------+
  11 // | Meta Data      |                  | Thread[126]    |
  12 // +----------------+                  +----------------+
  13 // | Thread[0]      |                  | Thread[127]    |
  14 // +----------------+                  +----------------+
  15 // ~ ...            ~                  ~ ...            ~
  16 // +----------------+                  +----------------+
  17 // | Thread[125]    |                  | Thread[252]    |
  18 // +----------------+                  +----------------+
  19 //
  20
  21 // 32 bytes
  22 struct platform_task_header_s {
  23         // Linkage to other platform task pages.
  24         platform_task_t head;
  25         platform_task_t next;
  26 #ifdef __LP64__
  27         uint64_t _reserved[2];
  28 #else
  29         uint32_t _reserved[6];
  30 #endif
  31 };
  32
  33 // 32 bytes
  34 struct platform_task_metadata_s {
  35         platform_thread_t cursor;
  36         task_t port;
  37         uint32_t gen;
  38         uint32_t is_64_bit:1, unused_flags:31;
  39 #ifdef __LP64__
  40         uint32_t _reserved[3];
  41 #else
  42         uint32_t _reserved[4];
  43 #endif
  44 };
  45
  46 // 32 bytes
  47 struct platform_thread_s {
  48         int32_t refcnt;
  49         uint32_t gen;
  50         platform_thread_id_t unique_id;
  51         mach_vm_address_t pthread_addr;
  52         thread_act_t act;
  53         uint32_t _reserved;
  54 };
  55
  56 struct platform_task_s {
  57         struct platform_task_header_s header;
  58         union {
  59                 struct platform_task_metadata_s metadata;
  60                 struct platform_thread_s threads[127];
  61         };
  62 };
  63
  64 #endif // __PLATFORM_INTROSPECTION_INTERNAL_H__