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1 | /* This file is part of the Linux Trace Toolkit viewer |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
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; |
7 | * |
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. |
12 | * |
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, |
16 | * MA 02111-1307, USA. |
17 | */ |
18 | |
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19 | #ifndef STATE_H |
20 | #define STATE_H |
21 | |
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22 | #include <glib.h> |
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23 | #include <lttv/tracecontext.h> |
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24 | #include <stdio.h> |
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25 | |
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26 | /* The operating system state, kept during the trace analysis, |
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27 | contains a subset of the real operating system state, |
28 | sufficient for the analysis, and possibly organized quite differently. |
29 | |
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30 | The state information is added to LttvTracesetContext, LttvTraceContext |
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31 | and LttvTracefileContext objects, used by process_traceset, through |
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32 | subtyping. The context objects already reflect the multiple tracefiles |
33 | (one per cpu) per trace and multiple traces per trace set. The state |
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34 | objects defined here simply add fields to the relevant context objects. |
35 | |
36 | There is no traceset specific state yet. It may eventually contains such |
37 | things as clock differences over time. |
38 | |
39 | The trace state currently consists in a process table. |
40 | |
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. |
45 | |
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 |
49 | from user mode). */ |
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50 | |
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51 | /* Priority of state hooks */ |
52 | #define LTTV_PRIO_STATE 25 |
53 | |
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54 | typedef struct _LttvTracesetState LttvTracesetState; |
55 | typedef struct _LttvTracesetStateClass LttvTracesetStateClass; |
56 | |
57 | typedef struct _LttvTraceState LttvTraceState; |
58 | typedef struct _LttvTraceStateClass LttvTraceStateClass; |
59 | |
60 | typedef struct _LttvTracefileState LttvTracefileState; |
61 | typedef struct _LttvTracefileStateClass LttvTracefileStateClass; |
62 | |
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63 | gint lttv_state_hook_add_event_hooks(void *hook_data, void *call_data); |
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64 | void lttv_state_add_event_hooks(LttvTracesetState *self); |
65 | |
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66 | gint lttv_state_hook_remove_event_hooks(void *hook_data, void *call_data); |
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67 | void lttv_state_remove_event_hooks(LttvTracesetState *self); |
68 | |
69 | void lttv_state_save_add_event_hooks(LttvTracesetState *self); |
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70 | // Hook wrapper. call_data is a trace context. |
71 | gint lttv_state_save_hook_add_event_hooks(void *hook_data, void *call_data); |
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72 | |
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73 | void lttv_state_save_remove_event_hooks(LttvTracesetState *self); |
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74 | // Hook wrapper. call_data is a trace context. |
75 | gint lttv_state_save_hook_remove_event_hooks(void *hook_data, void *call_data); |
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76 | |
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77 | void lttv_state_traceset_seek_time_closest(LttvTracesetState *self, LttTime t); |
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78 | |
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79 | /* The LttvProcessState structure defines the current state for each process. |
80 | A process can make system calls (in some rare cases nested) and receive |
81 | interrupts/faults. For instance, a process may issue a system call, |
82 | generate a page fault while reading an argument from user space, and |
83 | get caught by an interrupt. To represent these nested states, an |
84 | execution mode stack is maintained. The stack bottom is normal user mode |
85 | and the top of stack is the current execution mode. |
86 | |
87 | The execution mode stack tells about the process status, execution mode and |
88 | submode (interrupt, system call or IRQ number). All these could be |
89 | defined as enumerations but may need extensions (e.g. new process state). |
90 | GQuark are thus used. They are as easy to manipulate as integers but have |
91 | a string associated, just like enumerations. |
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92 | |
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93 | The execution mode is one of "user mode", "kernel thread", "system call", |
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94 | "interrupt request", "fault". */ |
95 | |
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96 | typedef GQuark LttvExecutionMode; |
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97 | |
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98 | extern LttvExecutionMode |
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99 | LTTV_STATE_USER_MODE, |
100 | LTTV_STATE_SYSCALL, |
101 | LTTV_STATE_TRAP, |
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102 | LTTV_STATE_IRQ, |
103 | LTTV_STATE_MODE_UNKNOWN; |
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104 | |
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105 | |
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106 | /* The submode number depends on the execution mode. For user mode or kernel |
107 | thread, which are the normal mode (execution mode stack bottom), |
108 | it is set to "none". For interrupt requests, faults and system calls, |
109 | it is set respectively to the interrupt name (e.g. "timer"), fault name |
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110 | (e.g. "page fault"), and system call name (e.g. "select"). */ |
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111 | |
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112 | typedef GQuark LttvExecutionSubmode; |
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113 | |
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114 | extern LttvExecutionSubmode |
115 | LTTV_STATE_SUBMODE_NONE, |
116 | LTTV_STATE_SUBMODE_UNKNOWN; |
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117 | |
118 | /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*" |
119 | where "*" describes the resource waited for (e.g. timer, process, |
120 | disk...). */ |
121 | |
122 | typedef GQuark LttvProcessStatus; |
123 | |
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124 | extern LttvProcessStatus |
125 | LTTV_STATE_UNNAMED, |
126 | LTTV_STATE_WAIT_FORK, |
127 | LTTV_STATE_WAIT_CPU, |
128 | LTTV_STATE_EXIT, |
129 | LTTV_STATE_WAIT, |
130 | LTTV_STATE_RUN; |
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131 | |
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132 | |
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133 | typedef struct _LttvExecutionState { |
134 | LttvExecutionMode t; |
135 | LttvExecutionSubmode n; |
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136 | LttTime entry; |
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137 | LttTime change; |
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138 | LttvProcessStatus s; |
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139 | } LttvExecutionState; |
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140 | |
141 | |
142 | typedef struct _LttvProcessState { |
143 | guint pid; |
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144 | guint ppid; |
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145 | LttTime creation_time; |
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146 | LttTime insertion_time; |
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147 | GQuark name; |
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148 | GQuark pid_time; |
149 | GArray *execution_stack; /* Array of LttvExecutionState */ |
150 | LttvExecutionState *state; /* Top of interrupt stack */ |
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151 | GQuark last_cpu; /* Last CPU where process was scheduled */ |
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152 | /* opened file descriptors, address map?... */ |
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153 | } LttvProcessState; |
154 | |
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155 | LttvProcessState * |
156 | lttv_state_find_process(LttvTracefileState *tfs, guint pid); |
157 | |
158 | LttvProcessState * |
159 | lttv_state_find_process_from_trace(LttvTraceState *ts, GQuark cpu, guint pid); |
160 | |
161 | LttvProcessState * |
162 | lttv_state_find_process_or_create(LttvTracefileState *tfs, guint pid); |
163 | |
164 | LttvProcessState * |
165 | lttv_state_create_process(LttvTracefileState *tfs, LttvProcessState *parent, |
166 | guint pid); |
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167 | |
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168 | void lttv_state_write(LttvTraceState *self, LttTime t, FILE *fp); |
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169 | |
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170 | /* The LttvTracesetState, LttvTraceState and LttvTracefileState types |
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171 | inherit from the corresponding Context objects defined in processTrace. */ |
172 | |
173 | #define LTTV_TRACESET_STATE_TYPE (lttv_traceset_state_get_type ()) |
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174 | #define LTTV_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTracesetState)) |
175 | #define LTTV_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass)) |
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176 | #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE)) |
177 | #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE)) |
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178 | #define LTTV_TRACESET_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass)) |
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179 | |
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180 | struct _LttvTracesetState { |
181 | LttvTracesetContext parent; |
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182 | }; |
183 | |
184 | struct _LttvTracesetStateClass { |
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185 | LttvTracesetContextClass parent; |
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186 | }; |
187 | |
188 | GType lttv_traceset_state_get_type (void); |
189 | |
190 | |
191 | #define LTTV_TRACE_STATE_TYPE (lttv_trace_state_get_type ()) |
192 | #define LTTV_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState)) |
193 | #define LTTV_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass)) |
194 | #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE)) |
195 | #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE)) |
196 | #define LTTV_TRACE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass)) |
197 | |
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198 | struct _LttvTraceState { |
199 | LttvTraceContext parent; |
200 | |
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201 | GHashTable *processes; /* LttvProcessState objects indexed by pid and |
202 | last_cpu */ |
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203 | guint nb_event, save_interval; |
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204 | /* Block/char devices, locks, memory pages... */ |
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205 | GQuark *eventtype_names; |
206 | GQuark *syscall_names; |
207 | GQuark *trap_names; |
208 | GQuark *irq_names; |
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209 | LttTime *max_time_state_recomputed_in_seek; |
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210 | }; |
211 | |
212 | struct _LttvTraceStateClass { |
213 | LttvTraceContextClass parent; |
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214 | |
215 | void (*state_save) (LttvTraceState *self, LttvAttribute *container); |
216 | void (*state_restore) (LttvTraceState *self, LttvAttribute *container); |
217 | void (*state_saved_free) (LttvTraceState *self, LttvAttribute *container); |
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218 | }; |
219 | |
220 | GType lttv_trace_state_get_type (void); |
221 | |
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222 | void lttv_state_save(LttvTraceState *self, LttvAttribute *container); |
223 | |
224 | void lttv_state_restore(LttvTraceState *self, LttvAttribute *container); |
225 | |
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226 | void lttv_state_state_saved_free(LttvTraceState *self, |
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227 | LttvAttribute *container); |
228 | |
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229 | |
230 | #define LTTV_TRACEFILE_STATE_TYPE (lttv_tracefile_state_get_type ()) |
231 | #define LTTV_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState)) |
232 | #define LTTV_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass)) |
233 | #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE)) |
234 | #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE)) |
235 | #define LTTV_TRACEFILE_STATE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass)) |
236 | |
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237 | struct _LttvTracefileState { |
238 | LttvTracefileContext parent; |
239 | |
240 | LttvProcessState *process; |
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241 | GQuark cpu_name; |
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242 | guint saved_position; |
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243 | }; |
244 | |
245 | struct _LttvTracefileStateClass { |
246 | LttvTracefileContextClass parent; |
247 | }; |
248 | |
249 | GType lttv_tracefile_state_get_type (void); |
250 | |
251 | |
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252 | #endif // STATE_H |