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 typedef struct _LttvTracesetState LttvTracesetState
;
52 typedef struct _LttvTracesetStateClass LttvTracesetStateClass
;
54 typedef struct _LttvTraceState LttvTraceState
;
55 typedef struct _LttvTraceStateClass LttvTraceStateClass
;
57 typedef struct _LttvTracefileState LttvTracefileState
;
58 typedef struct _LttvTracefileStateClass LttvTracefileStateClass
;
60 void lttv_state_add_event_hooks(LttvTracesetState
*self
);
62 void lttv_state_remove_event_hooks(LttvTracesetState
*self
);
64 void lttv_state_save_add_event_hooks(LttvTracesetState
*self
);
66 void lttv_state_save_remove_event_hooks(LttvTracesetState
*self
);
68 void lttv_state_traceset_seek_time_closest(LttvTracesetState
*self
, LttTime t
);
70 /* The LttvProcessState structure defines the current state for each process.
71 A process can make system calls (in some rare cases nested) and receive
72 interrupts/faults. For instance, a process may issue a system call,
73 generate a page fault while reading an argument from user space, and
74 get caught by an interrupt. To represent these nested states, an
75 execution mode stack is maintained. The stack bottom is normal user mode
76 and the top of stack is the current execution mode.
78 The execution mode stack tells about the process status, execution mode and
79 submode (interrupt, system call or IRQ number). All these could be
80 defined as enumerations but may need extensions (e.g. new process state).
81 GQuark are thus used. They are as easy to manipulate as integers but have
82 a string associated, just like enumerations.
84 The execution mode is one of "user mode", "kernel thread", "system call",
85 "interrupt request", "fault". */
87 typedef GQuark LttvExecutionMode
;
89 extern LttvExecutionMode
94 LTTV_STATE_MODE_UNKNOWN
;
97 /* The submode number depends on the execution mode. For user mode or kernel
98 thread, which are the normal mode (execution mode stack bottom),
99 it is set to "none". For interrupt requests, faults and system calls,
100 it is set respectively to the interrupt name (e.g. "timer"), fault name
101 (e.g. "page fault"), and system call name (e.g. "select"). */
103 typedef GQuark LttvExecutionSubmode
;
105 extern LttvExecutionSubmode
106 LTTV_STATE_SUBMODE_NONE
,
107 LTTV_STATE_SUBMODE_UNKNOWN
;
109 /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
110 where "*" describes the resource waited for (e.g. timer, process,
113 typedef GQuark LttvProcessStatus
;
115 extern LttvProcessStatus
117 LTTV_STATE_WAIT_FORK
,
124 typedef struct _LttvExecutionState
{
126 LttvExecutionSubmode n
;
130 } LttvExecutionState
;
133 typedef struct _LttvProcessState
{
136 LttTime creation_time
;
137 LttTime insertion_time
;
140 GArray
*execution_stack
; /* Array of LttvExecutionState */
141 LttvExecutionState
*state
; /* Top of interrupt stack */
142 GQuark last_cpu
; /* Last CPU where process was scheduled */
143 /* opened file descriptors, address map?... */
148 lttv_state_find_process(LttvTracefileState
*tfs
, guint pid
);
151 lttv_state_find_process_from_trace(LttvTraceState
*ts
, GQuark cpu
, guint pid
);
154 lttv_state_find_process_or_create(LttvTracefileState
*tfs
, guint pid
);
157 lttv_state_create_process(LttvTracefileState
*tfs
, LttvProcessState
*parent
,
160 void lttv_state_write(LttvTraceState
*self
, LttTime t
, FILE *fp
);
162 /* The LttvTracesetState, LttvTraceState and LttvTracefileState types
163 inherit from the corresponding Context objects defined in processTrace. */
165 #define LTTV_TRACESET_STATE_TYPE (lttv_traceset_state_get_type ())
166 #define LTTV_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTracesetState))
167 #define LTTV_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
168 #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE))
169 #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE))
170 #define LTTV_TRACESET_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
172 struct _LttvTracesetState
{
173 LttvTracesetContext parent
;
176 struct _LttvTracesetStateClass
{
177 LttvTracesetContextClass parent
;
180 GType
lttv_traceset_state_get_type (void);
183 #define LTTV_TRACE_STATE_TYPE (lttv_trace_state_get_type ())
184 #define LTTV_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState))
185 #define LTTV_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
186 #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE))
187 #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE))
188 #define LTTV_TRACE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
190 struct _LttvTraceState
{
191 LttvTraceContext parent
;
193 GHashTable
*processes
; /* LttvProcessState objects indexed by pid */
194 guint nb_event
, save_interval
;
195 /* Block/char devices, locks, memory pages... */
196 GQuark
*eventtype_names
;
197 GQuark
*syscall_names
;
200 LttTime
*max_time_state_recomputed_in_seek
;
203 struct _LttvTraceStateClass
{
204 LttvTraceContextClass parent
;
206 void (*state_save
) (LttvTraceState
*self
, LttvAttribute
*container
);
207 void (*state_restore
) (LttvTraceState
*self
, LttvAttribute
*container
);
208 void (*state_saved_free
) (LttvTraceState
*self
, LttvAttribute
*container
);
211 GType
lttv_trace_state_get_type (void);
213 void lttv_state_save(LttvTraceState
*self
, LttvAttribute
*container
);
215 void lttv_state_restore(LttvTraceState
*self
, LttvAttribute
*container
);
217 void lttv_state_state_saved_free(LttvTraceState
*self
,
218 LttvAttribute
*container
);
221 #define LTTV_TRACEFILE_STATE_TYPE (lttv_tracefile_state_get_type ())
222 #define LTTV_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
223 #define LTTV_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
224 #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE))
225 #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE))
226 #define LTTV_TRACEFILE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
228 struct _LttvTracefileState
{
229 LttvTracefileContext parent
;
231 LttvProcessState
*process
;
233 guint saved_position
;
236 struct _LttvTracefileStateClass
{
237 LttvTracefileContextClass parent
;
240 GType
lttv_tracefile_state_get_type (void);