ltt/branches/poly/include/lttv/state.h

   1 #ifndef STATE_H
   2 #define STATE_H
   3
   4 #include <lttv/processTrace.h>
   5
   6 /* The operating system state kept during the trace analysis
   7    contains a subset of the real operating system state,
   8    sufficient for the analysis, and possibly organized quite differently.
   9
  10    The state information is added to LttvTraceSetContext, LttvTraceContext
  11    and LttvTracefileContext objects, used by processTrace, through
  12    subtyping. The context objects already reflect the multiple tracefiles
  13    (one per cpu) per trace and multiple traces per trace set. The state
  14    objects defined here simply add fields to the relevant context objects. */
  15
  16
  17 /* The LttvProcessState structure defines the current state for each process.
  18    A process can make system calls (in some rare cases nested) and receive
  19    interrupts/faults. For instance, a process may issue a system call,
  20    generate a page fault while reading an argument from user space, and
  21    get caught by an interrupt. To represent these nested states, an
  22    interrupt stack is maintained. The stack bottom is normal user mode and
  23    the top of stack is the current interrupt state.
  24
  25    The interrupt state tells about the process status, interrupt type and
  26    interrupt number. All these could be defined as enumerations but may
  27    need extensions (e.g. new process state). GQuark are thus used being
  28    as easy to manipulate as integers but having a string associated, just
  29    like enumerations. */
  30
  31
  32 gboolean lttv_state_add_event_hooks(void *hook_data, void *call_data);
  33
  34 gboolean lttv_state_remove_event_hooks(void *hook_data, void *call_data);
  35
  36
  37 /* The interrupt type is one of "user mode", "kernel thread", "system call",
  38    "interrupt request", "fault". */
  39
  40 typedef GQuark LttvInterruptType;
  41
  42
  43 /* The interrupt number depends on the interrupt type. For user mode or kernel
  44    thread, which are the normal mode (interrupt stack bottom), it is set to
  45    "none". For interrupt requests, faults and system calls, it is set
  46    respectively to the interrupt name (e.g. "timer"), fault name
  47    (e.g. "page fault"), and system call name (e.g. "select").
  48
  49 typedef GQuark LttvInterruptNumber;
  50
  51
  52 /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
  53    where "*" describes the resource waited for (e.g. timer, process,
  54    disk...). */
  55
  56 typedef GQuark LttvProcessStatus;
  57
  58
  59 typedef _LttvInterruptState {
  60   LttvInterruptType t;
  61   LttvInterruptNumber n;
  62   LttvTime entry;
  63   LttvTime last_change;
  64   LttvProcessStatus s;
  65 } LttvInterruptState;
  66
  67
  68 typedef struct _LttvProcessState {
  69   guint pid;
  70   LttvTime birth;
  71   GQuark name;
  72   GArray *interrupt_stack;         /* Array of LttvInterruptState */
  73   LttvInterruptState *state;       /* Top of interrupt stack */
  74   /* opened file descriptors, address map... */
  75 } LttvProcessState;
  76
  77
  78 /* The LttvTraceSetState, LttvTraceState and LttvTracefileState types
  79    inherit from the corresponding Context objects defined in processTrace. */
  80
  81 #define LTTV_TRACESET_STATE_TYPE  (lttv_traceset_state_get_type ())
  82 #define LTTV_TRACESET_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTraceSetState))
  83 #define LTTV_TRACESET_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTraceSetStateClass))
  84 #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE))
  85 #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE))
  86 #define LTTV_TRACESET_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTraceSetStateClass))
  87
  88 typedef struct _LttvTraceSetState LttvTraceSetState;
  89 typedef struct _LttvTraceSetStateClass LttvTraceSetStateClass;
  90
  91 struct _LttvTraceSetState {
  92   LttvTraceSetContext parent;
  93 };
  94
  95 struct _LttvTracesetStateClass {
  96   LttvTraceSetClass parent;
  97 };
  98
  99 GType lttv_traceset_state_get_type (void);
 100
 101
 102 #define LTTV_TRACE_STATE_TYPE  (lttv_trace_state_get_type ())
 103 #define LTTV_TRACE_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState))
 104 #define LTTV_TRACE_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
 105 #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE))
 106 #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE))
 107 #define LTTV_TRACE_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
 108
 109 typedef struct _LttvTraceState LttvTraceState;
 110 typedef struct _LttvTraceStateClass LttvTraceStateClass;
 111
 112 struct _LttvTraceState {
 113   LttvTraceContext parent;
 114
 115   GHashTable *processes;  /* LttvProcessState objects indexed by pid */
 116   /* Block/char devices, locks, memory pages... */
 117 };
 118
 119 struct _LttvTraceStateClass {
 120   LttvTraceContextClass parent;
 121 };
 122
 123 GType lttv_trace_state_get_type (void);
 124
 125
 126 #define LTTV_TRACEFILE_STATE_TYPE  (lttv_tracefile_state_get_type ())
 127 #define LTTV_TRACEFILE_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
 128 #define LTTV_TRACEFILE_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
 129 #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE))
 130 #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE))
 131 #define LTTV_TRACEFILE_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
 132
 133 typedef struct _LttvTracefileState LttvTracefileState;
 134 typedef struct _LttvTracefileStateClass LttvTracefileStateClass;
 135
 136 struct _LttvTracefileState {
 137   LttvTracefileContext parent;
 138
 139   LttvProcessState *process;
 140 };
 141
 142 struct _LttvTracefileStateClass {
 143   LttvTracefileContextClass parent;
 144 };
 145
 146 GType lttv_tracefile_state_get_type (void);
 147
 148
 149 #endif // PROCESSTRACE_H