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 process_traceset, 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 #define LTTV_STATE_SAVE_INTERVAL 50000
56 /* Facilities Quarks */
60 LTT_FACILITY_KERNEL_ARCH
,
63 LTT_FACILITY_USER_GENERIC
;
68 LTT_EVENT_SYSCALL_ENTRY
,
69 LTT_EVENT_SYSCALL_EXIT
,
74 LTT_EVENT_SOFT_IRQ_ENTRY
,
75 LTT_EVENT_SOFT_IRQ_EXIT
,
76 LTT_EVENT_SCHED_SCHEDULE
,
77 LTT_EVENT_PROCESS_FORK
,
78 LTT_EVENT_KTHREAD_CREATE
,
79 LTT_EVENT_PROCESS_EXIT
,
80 LTT_EVENT_PROCESS_FREE
,
82 LTT_EVENT_PROCESS_STATE
,
83 LTT_EVENT_STATEDUMP_END
,
84 LTT_EVENT_FUNCTION_ENTRY
,
85 LTT_EVENT_FUNCTION_EXIT
,
86 LTT_EVENT_THREAD_BRAND
;
94 LTT_FIELD_SOFT_IRQ_ID
,
111 typedef struct _LttvTracesetState LttvTracesetState
;
112 typedef struct _LttvTracesetStateClass LttvTracesetStateClass
;
114 typedef struct _LttvTraceState LttvTraceState
;
115 typedef struct _LttvTraceStateClass LttvTraceStateClass
;
117 typedef struct _LttvTracefileState LttvTracefileState
;
118 typedef struct _LttvTracefileStateClass LttvTracefileStateClass
;
120 gint
lttv_state_hook_add_event_hooks(void *hook_data
, void *call_data
);
121 void lttv_state_add_event_hooks(LttvTracesetState
*self
);
123 gint
lttv_state_hook_remove_event_hooks(void *hook_data
, void *call_data
);
124 void lttv_state_remove_event_hooks(LttvTracesetState
*self
);
126 void lttv_state_save_add_event_hooks(LttvTracesetState
*self
);
127 // Hook wrapper. call_data is a trace context.
128 gint
lttv_state_save_hook_add_event_hooks(void *hook_data
, void *call_data
);
130 void lttv_state_save_remove_event_hooks(LttvTracesetState
*self
);
131 // Hook wrapper. call_data is a trace context.
132 gint
lttv_state_save_hook_remove_event_hooks(void *hook_data
, void *call_data
);
134 void lttv_state_traceset_seek_time_closest(LttvTracesetState
*self
, LttTime t
);
136 /* The LttvProcessState structure defines the current state for each process.
137 A process can make system calls (in some rare cases nested) and receive
138 interrupts/faults. For instance, a process may issue a system call,
139 generate a page fault while reading an argument from user space, and
140 get caught by an interrupt. To represent these nested states, an
141 execution mode stack is maintained. The stack bottom is normal user mode
142 and the top of stack is the current execution mode.
144 The execution mode stack tells about the process status, execution mode and
145 submode (interrupt, system call or IRQ number). All these could be
146 defined as enumerations but may need extensions (e.g. new process state).
147 GQuark are thus used. They are as easy to manipulate as integers but have
148 a string associated, just like enumerations.
150 The execution mode is one of "user mode", "kernel thread", "system call",
151 "interrupt request", "fault". */
153 typedef GQuark LttvExecutionMode
;
155 extern LttvExecutionMode
156 LTTV_STATE_USER_MODE
,
161 LTTV_STATE_MODE_UNKNOWN
;
164 /* The submode number depends on the execution mode. For user mode or kernel
165 thread, which are the normal mode (execution mode stack bottom),
166 it is set to "none". For interrupt requests, faults and system calls,
167 it is set respectively to the interrupt name (e.g. "timer"), fault name
168 (e.g. "page fault"), and system call name (e.g. "select"). */
170 typedef GQuark LttvExecutionSubmode
;
172 extern LttvExecutionSubmode
173 LTTV_STATE_SUBMODE_NONE
,
174 LTTV_STATE_SUBMODE_UNKNOWN
;
176 /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
177 where "*" describes the resource waited for (e.g. timer, process,
180 typedef GQuark LttvProcessStatus
;
182 extern LttvProcessStatus
184 LTTV_STATE_WAIT_FORK
,
193 LTTV_STATE_UNBRANDED
;
195 typedef GQuark LttvProcessType
;
197 extern LttvProcessType
198 LTTV_STATE_USER_THREAD
,
199 LTTV_STATE_KERNEL_THREAD
;
201 typedef GQuark LttvCPUMode
;
209 typedef GQuark LttvIRQMode
;
215 typedef struct _LttvExecutionState
{
217 LttvExecutionSubmode n
;
220 LttTime cum_cpu_time
;
222 } LttvExecutionState
;
224 typedef struct _LttvProcessState
{
228 LttTime creation_time
;
229 LttTime insertion_time
;
233 GArray
*execution_stack
; /* Array of LttvExecutionState */
234 LttvExecutionState
*state
; /* Top of interrupt stack */
235 /* WARNING : each time the execution_stack size is modified, the state
236 * must be reget : g_array_set_size can have to move the array.
238 guint cpu
; /* CPU where process is scheduled (being either in
239 the active or inactive runqueue)*/
240 // guint last_tracefile_index; /* index in the trace for cpu tracefile */
241 LttvTracefileState
*usertrace
; /* Associated usertrace */
242 /* opened file descriptors, address map?... */
243 GArray
*user_stack
; /* User space function call stack */
244 guint64 current_function
;
245 LttvProcessType type
; /* kernel thread or user space ? */
246 guint target_pid
; /* target PID of the current event. */
249 #define ANY_CPU 0 /* For clarity sake : a call to lttv_state_find_process for
250 a PID != 0 will search on any cpu automatically. */
253 lttv_state_find_process(LttvTraceState
*ts
, guint cpu
, guint pid
);
256 lttv_state_find_process_or_create(LttvTraceState
*ts
, guint cpu
, guint pid
,
257 const LttTime
*timestamp
);
260 lttv_state_create_process(LttvTraceState
*tcs
, LttvProcessState
*parent
,
261 guint cpu
, guint pid
, guint tgid
, GQuark name
, const LttTime
*timestamp
);
263 void lttv_state_write(LttvTraceState
*self
, LttTime t
, FILE *fp
);
264 void lttv_state_write_raw(LttvTraceState
*self
, LttTime t
, FILE *fp
);
266 /* The LttvTracesetState, LttvTraceState and LttvTracefileState types
267 inherit from the corresponding Context objects defined in processTrace. */
269 #define LTTV_TRACESET_STATE_TYPE (lttv_traceset_state_get_type ())
270 #define LTTV_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTracesetState))
271 #define LTTV_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
272 #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE))
273 #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE))
274 #define LTTV_TRACESET_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
276 struct _LttvTracesetState
{
277 LttvTracesetContext parent
;
280 struct _LttvTracesetStateClass
{
281 LttvTracesetContextClass parent
;
284 GType
lttv_traceset_state_get_type (void);
287 #define LTTV_TRACE_STATE_TYPE (lttv_trace_state_get_type ())
288 #define LTTV_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState))
289 #define LTTV_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
290 #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE))
291 #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE))
292 #define LTTV_TRACE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
294 typedef struct _LttvCPUState
{
299 typedef struct _LttvIRQState
{
303 struct _LttvTraceState
{
304 LttvTraceContext parent
;
306 GHashTable
*processes
; /* LttvProcessState objects indexed by pid and
308 GHashTable
*usertraces
; /* GPtrArray objects indexed by pid, containing
309 pointers to LttvTracefileState objects. */
310 guint nb_event
, save_interval
;
311 /* Block/char devices, locks, memory pages... */
312 GQuark
*eventtype_names
;
313 GQuark
*syscall_names
;
320 GQuark
*soft_irq_names
;
321 LttTime
*max_time_state_recomputed_in_seek
;
323 /* Array of per cpu running process */
324 LttvProcessState
**running_process
;
325 gboolean has_precomputed_states
;
326 LttvCPUState
*cpu_states
; /* state of each cpu */
327 LttvIRQState
*irq_states
; /* state of each irq handler */
330 struct _LttvTraceStateClass
{
331 LttvTraceContextClass parent
;
333 void (*state_save
) (LttvTraceState
*self
, LttvAttribute
*container
);
334 void (*state_restore
) (LttvTraceState
*self
, LttvAttribute
*container
);
335 void (*state_saved_free
) (LttvTraceState
*self
, LttvAttribute
*container
);
338 GType
lttv_trace_state_get_type (void);
340 void lttv_state_save(LttvTraceState
*self
, LttvAttribute
*container
);
342 void lttv_state_restore(LttvTraceState
*self
, LttvAttribute
*container
);
344 void lttv_state_state_saved_free(LttvTraceState
*self
,
345 LttvAttribute
*container
);
347 int lttv_state_pop_state_cleanup(LttvProcessState
*process
,
348 LttvTracefileState
*tfs
);
350 #define LTTV_TRACEFILE_STATE_TYPE (lttv_tracefile_state_get_type ())
351 #define LTTV_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
352 #define LTTV_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
353 #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE))
354 #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE))
355 #define LTTV_TRACEFILE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
357 struct _LttvTracefileState
{
358 LttvTracefileContext parent
;
360 GQuark tracefile_name
;
361 guint cpu
; /* Current cpu of the tracefile */ /* perhaps merge in cpu_state */
362 LttvCPUState
*cpu_state
; /* cpu resource state */
365 struct _LttvTracefileStateClass
{
366 LttvTracefileContextClass parent
;
369 GType
lttv_tracefile_state_get_type (void);
371 static inline guint
lttv_state_get_target_pid(LttvTracefileState
*tfs
)
373 LttvTraceState
*ts
= (LttvTraceState
*)tfs
->parent
.t_context
;
374 guint cpu
= tfs
->cpu
;
375 LttvProcessState
*process
= ts
->running_process
[cpu
];
377 if(tfs
->parent
.target_pid
>= 0) return tfs
->parent
.target_pid
;
378 else return process
->pid
;
382 #define HDR_PROCESS 0
384 #define HDR_USER_STACK 2
385 #define HDR_USERTRACE 3
386 #define HDR_PROCESS_STATE 4
388 #define HDR_TRACEFILE 6
389 #define HDR_TRACESET 7