| 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(LttvTracesetState *self); |
| 33 | |
| 34 | gboolean lttv_state_remove_event_hooks(LttvTracesetState *self); |
| 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 |