1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
23 #include <lttv/tracecontext.h>
26 /* The operating system state, kept during the trace analysis,
27 contains a subset of the real operating system state,
28 sufficient for the analysis, and possibly organized quite differently.
30 The state information is added to LttvTracesetContext, LttvTraceContext
31 and LttvTracefileContext objects, used by processTrace, through
32 subtyping. The context objects already reflect the multiple tracefiles
33 (one per cpu) per trace and multiple traces per trace set. The state
34 objects defined here simply add fields to the relevant context objects.
36 There is no traceset specific state yet. It may eventually contains such
37 things as clock differences over time.
39 The trace state currently consists in a process table.
41 The tracefile level state relates to the associated cpu. It contains the
42 position of the current event in the tracefile (since the state depends on
43 which events have been processed) and a pointer to the current process,
44 in the process table, being run on that cpu.
46 For each process in the process table, various informations such as exec
47 file name, pid, ppid and creation time are stored. Each process state also
48 contains an execution mode stack (e.g. irq within system call, called
51 /* Priority of state hooks */
52 #define LTTV_PRIO_STATE 25
54 typedef struct _LttvTracesetState LttvTracesetState
;
55 typedef struct _LttvTracesetStateClass LttvTracesetStateClass
;
57 typedef struct _LttvTraceState LttvTraceState
;
58 typedef struct _LttvTraceStateClass LttvTraceStateClass
;
60 typedef struct _LttvTracefileState LttvTracefileState
;
61 typedef struct _LttvTracefileStateClass LttvTracefileStateClass
;
63 void lttv_state_add_event_hooks(LttvTracesetState
*self
);
65 void lttv_state_remove_event_hooks(LttvTracesetState
*self
);
67 void lttv_state_save_add_event_hooks(LttvTracesetState
*self
);
69 void lttv_state_save_remove_event_hooks(LttvTracesetState
*self
);
71 void lttv_state_traceset_seek_time_closest(LttvTracesetState
*self
, LttTime t
);
73 /* The LttvProcessState structure defines the current state for each process.
74 A process can make system calls (in some rare cases nested) and receive
75 interrupts/faults. For instance, a process may issue a system call,
76 generate a page fault while reading an argument from user space, and
77 get caught by an interrupt. To represent these nested states, an
78 execution mode stack is maintained. The stack bottom is normal user mode
79 and the top of stack is the current execution mode.
81 The execution mode stack tells about the process status, execution mode and
82 submode (interrupt, system call or IRQ number). All these could be
83 defined as enumerations but may need extensions (e.g. new process state).
84 GQuark are thus used. They are as easy to manipulate as integers but have
85 a string associated, just like enumerations.
87 The execution mode is one of "user mode", "kernel thread", "system call",
88 "interrupt request", "fault". */
90 typedef GQuark LttvExecutionMode
;
92 extern LttvExecutionMode
97 LTTV_STATE_MODE_UNKNOWN
;
100 /* The submode number depends on the execution mode. For user mode or kernel
101 thread, which are the normal mode (execution mode stack bottom),
102 it is set to "none". For interrupt requests, faults and system calls,
103 it is set respectively to the interrupt name (e.g. "timer"), fault name
104 (e.g. "page fault"), and system call name (e.g. "select"). */
106 typedef GQuark LttvExecutionSubmode
;
108 extern LttvExecutionSubmode
109 LTTV_STATE_SUBMODE_NONE
,
110 LTTV_STATE_SUBMODE_UNKNOWN
;
112 /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
113 where "*" describes the resource waited for (e.g. timer, process,
116 typedef GQuark LttvProcessStatus
;
118 extern LttvProcessStatus
120 LTTV_STATE_WAIT_FORK
,
127 typedef struct _LttvExecutionState
{
129 LttvExecutionSubmode n
;
133 } LttvExecutionState
;
136 typedef struct _LttvProcessState
{
139 LttTime creation_time
;
140 LttTime insertion_time
;
143 GArray
*execution_stack
; /* Array of LttvExecutionState */
144 LttvExecutionState
*state
; /* Top of interrupt stack */
145 GQuark last_cpu
; /* Last CPU where process was scheduled */
146 /* opened file descriptors, address map?... */
151 lttv_state_find_process(LttvTracefileState
*tfs
, guint pid
);
154 lttv_state_find_process_from_trace(LttvTraceState
*ts
, GQuark cpu
, guint pid
);
157 lttv_state_find_process_or_create(LttvTracefileState
*tfs
, guint pid
);
160 lttv_state_create_process(LttvTracefileState
*tfs
, LttvProcessState
*parent
,
163 void lttv_state_write(LttvTraceState
*self
, LttTime t
, FILE *fp
);
165 /* The LttvTracesetState, LttvTraceState and LttvTracefileState types
166 inherit from the corresponding Context objects defined in processTrace. */
168 #define LTTV_TRACESET_STATE_TYPE (lttv_traceset_state_get_type ())
169 #define LTTV_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTracesetState))
170 #define LTTV_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
171 #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE))
172 #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE))
173 #define LTTV_TRACESET_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
175 struct _LttvTracesetState
{
176 LttvTracesetContext parent
;
179 struct _LttvTracesetStateClass
{
180 LttvTracesetContextClass parent
;
183 GType
lttv_traceset_state_get_type (void);
186 #define LTTV_TRACE_STATE_TYPE (lttv_trace_state_get_type ())
187 #define LTTV_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState))
188 #define LTTV_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
189 #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE))
190 #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE))
191 #define LTTV_TRACE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
193 struct _LttvTraceState
{
194 LttvTraceContext parent
;
196 GHashTable
*processes
; /* LttvProcessState objects indexed by pid */
197 guint nb_event
, save_interval
;
198 /* Block/char devices, locks, memory pages... */
199 GQuark
*eventtype_names
;
200 GQuark
*syscall_names
;
203 LttTime
*max_time_state_recomputed_in_seek
;
206 struct _LttvTraceStateClass
{
207 LttvTraceContextClass parent
;
209 void (*state_save
) (LttvTraceState
*self
, LttvAttribute
*container
);
210 void (*state_restore
) (LttvTraceState
*self
, LttvAttribute
*container
);
211 void (*state_saved_free
) (LttvTraceState
*self
, LttvAttribute
*container
);
214 GType
lttv_trace_state_get_type (void);
216 void lttv_state_save(LttvTraceState
*self
, LttvAttribute
*container
);
218 void lttv_state_restore(LttvTraceState
*self
, LttvAttribute
*container
);
220 void lttv_state_state_saved_free(LttvTraceState
*self
,
221 LttvAttribute
*container
);
224 #define LTTV_TRACEFILE_STATE_TYPE (lttv_tracefile_state_get_type ())
225 #define LTTV_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
226 #define LTTV_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
227 #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE))
228 #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE))
229 #define LTTV_TRACEFILE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
231 struct _LttvTracefileState
{
232 LttvTracefileContext parent
;
234 LttvProcessState
*process
;
236 guint saved_position
;
239 struct _LttvTracefileStateClass
{
240 LttvTracefileContextClass parent
;
243 GType
lttv_tracefile_state_get_type (void);