ltt/branches/poly/lttv/lttv/state.h

   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
  19 #ifndef STATE_H
  20 #define STATE_H
  21
  22 #include <glib.h>
  23 #include <lttv/tracecontext.h>
  24 #include <stdio.h>
  25
  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.
  29
  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.
  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). */
  50
  51 /* Priority of state hooks */
  52 #define LTTV_PRIO_STATE 25
  53
  54 #define LTTV_STATE_SAVE_INTERVAL 50000
  55
  56 /* Facilities Quarks */
  57
  58 extern GQuark
  59     LTT_FACILITY_KERNEL,
  60     LTT_FACILITY_KERNEL_ARCH,
  61     LTT_FACILITY_PROCESS,
  62     LTT_FACILITY_FS,
  63     LTT_FACILITY_STATEDUMP,
  64     LTT_FACILITY_USER_GENERIC;
  65
  66 /* Events Quarks */
  67
  68 extern GQuark
  69     LTT_EVENT_SYSCALL_ENTRY,
  70     LTT_EVENT_SYSCALL_EXIT,
  71     LTT_EVENT_TRAP_ENTRY,
  72     LTT_EVENT_TRAP_EXIT,
  73     LTT_EVENT_IRQ_ENTRY,
  74     LTT_EVENT_IRQ_EXIT,
  75     LTT_EVENT_SOFT_IRQ_ENTRY,
  76     LTT_EVENT_SOFT_IRQ_EXIT,
  77     LTT_EVENT_SCHEDCHANGE,
  78     LTT_EVENT_FORK,
  79     LTT_EVENT_KERNEL_THREAD,
  80     LTT_EVENT_EXIT,
  81     LTT_EVENT_FREE,
  82     LTT_EVENT_EXEC,
  83     LTT_EVENT_ENUM_PROCESS_STATE,
  84     LTT_EVENT_STATEDUMP_END,
  85     LTT_EVENT_FUNCTION_ENTRY,
  86     LTT_EVENT_FUNCTION_EXIT,
  87     LTT_EVENT_THREAD_BRAND;
  88
  89 /* Fields Quarks */
  90
  91 extern GQuark
  92     LTT_FIELD_SYSCALL_ID,
  93     LTT_FIELD_TRAP_ID,
  94     LTT_FIELD_IRQ_ID,
  95     LTT_FIELD_SOFT_IRQ_ID,
  96     LTT_FIELD_OUT,
  97     LTT_FIELD_IN,
  98     LTT_FIELD_OUT_STATE,
  99     LTT_FIELD_PARENT_PID,
 100     LTT_FIELD_CHILD_PID,
 101     LTT_FIELD_PID,
 102     LTT_FIELD_TGID,
 103     LTT_FIELD_FILENAME,
 104     LTT_FIELD_NAME,
 105     LTT_FIELD_TYPE,
 106     LTT_FIELD_MODE,
 107     LTT_FIELD_SUBMODE,
 108     LTT_FIELD_STATUS,
 109     LTT_FIELD_THIS_FN,
 110     LTT_FIELD_CALL_SITE;
 111
 112 typedef struct _LttvTracesetState LttvTracesetState;
 113 typedef struct _LttvTracesetStateClass LttvTracesetStateClass;
 114
 115 typedef struct _LttvTraceState LttvTraceState;
 116 typedef struct _LttvTraceStateClass LttvTraceStateClass;
 117
 118 typedef struct _LttvTracefileState LttvTracefileState;
 119 typedef struct _LttvTracefileStateClass LttvTracefileStateClass;
 120
 121 gint lttv_state_hook_add_event_hooks(void *hook_data, void *call_data);
 122 void lttv_state_add_event_hooks(LttvTracesetState *self);
 123
 124 gint lttv_state_hook_remove_event_hooks(void *hook_data, void *call_data);
 125 void lttv_state_remove_event_hooks(LttvTracesetState *self);
 126
 127 void lttv_state_save_add_event_hooks(LttvTracesetState *self);
 128 // Hook wrapper. call_data is a trace context.
 129 gint lttv_state_save_hook_add_event_hooks(void *hook_data, void *call_data);
 130
 131 void lttv_state_save_remove_event_hooks(LttvTracesetState *self);
 132 // Hook wrapper. call_data is a trace context.
 133 gint lttv_state_save_hook_remove_event_hooks(void *hook_data, void *call_data);
 134
 135 void lttv_state_traceset_seek_time_closest(LttvTracesetState *self, LttTime t);
 136
 137 /* The LttvProcessState structure defines the current state for each process.
 138    A process can make system calls (in some rare cases nested) and receive
 139    interrupts/faults. For instance, a process may issue a system call,
 140    generate a page fault while reading an argument from user space, and
 141    get caught by an interrupt. To represent these nested states, an
 142    execution mode stack is maintained. The stack bottom is normal user mode
 143    and the top of stack is the current execution mode.
 144
 145    The execution mode stack tells about the process status, execution mode and
 146    submode (interrupt, system call or IRQ number). All these could be
 147    defined as enumerations but may need extensions (e.g. new process state).
 148    GQuark are thus used. They are as easy to manipulate as integers but have
 149    a string associated, just like enumerations.
 150
 151    The execution mode is one of "user mode", "kernel thread", "system call",
 152    "interrupt request", "fault". */
 153
 154 typedef GQuark LttvExecutionMode;
 155
 156 extern LttvExecutionMode
 157   LTTV_STATE_USER_MODE,
 158   LTTV_STATE_SYSCALL,
 159   LTTV_STATE_TRAP,
 160   LTTV_STATE_IRQ,
 161   LTTV_STATE_SOFT_IRQ,
 162   LTTV_STATE_MODE_UNKNOWN;
 163
 164
 165 /* The submode number depends on the execution mode. For user mode or kernel
 166    thread, which are the normal mode (execution mode stack bottom),
 167    it is set to "none". For interrupt requests, faults and system calls,
 168    it is set respectively to the interrupt name (e.g. "timer"), fault name
 169    (e.g. "page fault"), and system call name (e.g. "select"). */
 170
 171 typedef GQuark LttvExecutionSubmode;
 172
 173 extern LttvExecutionSubmode
 174   LTTV_STATE_SUBMODE_NONE,
 175   LTTV_STATE_SUBMODE_UNKNOWN;
 176
 177 /* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
 178    where "*" describes the resource waited for (e.g. timer, process,
 179    disk...). */
 180
 181 typedef GQuark LttvProcessStatus;
 182
 183 extern LttvProcessStatus
 184   LTTV_STATE_UNNAMED,
 185   LTTV_STATE_UNBRANDED,
 186   LTTV_STATE_WAIT_FORK,
 187   LTTV_STATE_WAIT_CPU,
 188   LTTV_STATE_EXIT,
 189   LTTV_STATE_ZOMBIE,
 190   LTTV_STATE_WAIT,
 191   LTTV_STATE_RUN,
 192   LTTV_STATE_DEAD;
 193
 194 typedef GQuark LttvProcessType;
 195
 196 extern LttvProcessType
 197   LTTV_STATE_USER_THREAD,
 198   LTTV_STATE_KERNEL_THREAD;
 199
 200 typedef struct _LttvExecutionState {
 201   LttvExecutionMode t;
 202   LttvExecutionSubmode n;
 203   LttTime entry;
 204   LttTime change;
 205   LttTime cum_cpu_time;
 206   LttvProcessStatus s;
 207 } LttvExecutionState;
 208
 209 typedef struct _LttvProcessState {
 210   guint pid;
 211   guint tgid;
 212   guint ppid;
 213   LttTime creation_time;
 214   LttTime insertion_time;
 215   GQuark name;
 216   GQuark brand;
 217   GQuark pid_time;
 218   GArray *execution_stack;         /* Array of LttvExecutionState */
 219   LttvExecutionState *state;       /* Top of interrupt stack */
 220       /* WARNING : each time the execution_stack size is modified, the state
 221        * must be reget : g_array_set_size can have to move the array.
 222        * (Mathieu) */
 223   guint cpu;                /* CPU where process is scheduled (being either in
 224                                the active or inactive runqueue)*/
 225 //  guint  last_tracefile_index;    /* index in the trace for cpu tracefile */
 226   LttvTracefileState  *usertrace;    /* Associated usertrace */
 227   /* opened file descriptors, address map?... */
 228   GArray *user_stack;          /* User space function call stack */
 229   guint64  current_function;
 230   LttvProcessType type;        /* kernel thread or user space ? */
 231   guint target_pid; /* target PID of the current event. */
 232 } LttvProcessState;
 233
 234 #define ANY_CPU 0 /* For clarity sake : a call to lttv_state_find_process for
 235                      a PID != 0 will search on any cpu automatically. */
 236
 237 LttvProcessState *
 238 lttv_state_find_process(LttvTraceState *ts, guint cpu, guint pid);
 239
 240 LttvProcessState *
 241 lttv_state_find_process_or_create(LttvTraceState *ts, guint cpu, guint pid,
 242     const LttTime *timestamp);
 243
 244 LttvProcessState *
 245 lttv_state_create_process(LttvTraceState *tcs, LttvProcessState *parent,
 246     guint cpu, guint pid, guint tgid, GQuark name, const LttTime *timestamp);
 247
 248 void lttv_state_write(LttvTraceState *self, LttTime t, FILE *fp);
 249 void lttv_state_write_raw(LttvTraceState *self, LttTime t, FILE *fp);
 250
 251 /* The LttvTracesetState, LttvTraceState and LttvTracefileState types
 252    inherit from the corresponding Context objects defined in processTrace. */
 253
 254 #define LTTV_TRACESET_STATE_TYPE  (lttv_traceset_state_get_type ())
 255 #define LTTV_TRACESET_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACESET_STATE_TYPE, LttvTracesetState))
 256 #define LTTV_TRACESET_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
 257 #define LTTV_IS_TRACESET_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACESET_STATE_TYPE))
 258 #define LTTV_IS_TRACESET_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACESET_STATE_TYPE))
 259 #define LTTV_TRACESET_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACESET_STATE_TYPE, LttvTracesetStateClass))
 260
 261 struct _LttvTracesetState {
 262   LttvTracesetContext parent;
 263 };
 264
 265 struct _LttvTracesetStateClass {
 266   LttvTracesetContextClass parent;
 267 };
 268
 269 GType lttv_traceset_state_get_type (void);
 270
 271
 272 #define LTTV_TRACE_STATE_TYPE  (lttv_trace_state_get_type ())
 273 #define LTTV_TRACE_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACE_STATE_TYPE, LttvTraceState))
 274 #define LTTV_TRACE_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
 275 #define LTTV_IS_TRACE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACE_STATE_TYPE))
 276 #define LTTV_IS_TRACE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACE_STATE_TYPE))
 277 #define LTTV_TRACE_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACE_STATE_TYPE, LttvTraceStateClass))
 278
 279 struct _LttvTraceState {
 280   LttvTraceContext parent;
 281
 282   GHashTable *processes;  /* LttvProcessState objects indexed by pid and
 283                              last_cpu */
 284   GHashTable *usertraces;  /* GPtrArray objects indexed by pid, containing
 285                              pointers to LttvTracefileState objects. */
 286   guint nb_event, save_interval;
 287   /* Block/char devices, locks, memory pages... */
 288   GQuark *eventtype_names;
 289   GQuark *syscall_names;
 290   guint  nb_syscalls;
 291   GQuark *trap_names;
 292   guint  nb_traps;
 293   GQuark *irq_names;
 294   GQuark *soft_irq_names;
 295   LttTime *max_time_state_recomputed_in_seek;
 296
 297   /* Array of per cpu running process */
 298   LttvProcessState **running_process;
 299   gboolean has_precomputed_states;
 300 };
 301
 302 struct _LttvTraceStateClass {
 303   LttvTraceContextClass parent;
 304
 305   void (*state_save) (LttvTraceState *self, LttvAttribute *container);
 306   void (*state_restore) (LttvTraceState *self, LttvAttribute *container);
 307   void (*state_saved_free) (LttvTraceState *self, LttvAttribute *container);
 308 };
 309
 310 GType lttv_trace_state_get_type (void);
 311
 312 void lttv_state_save(LttvTraceState *self, LttvAttribute *container);
 313
 314 void lttv_state_restore(LttvTraceState *self, LttvAttribute *container);
 315
 316 void lttv_state_state_saved_free(LttvTraceState *self,
 317     LttvAttribute *container);
 318
 319 int lttv_state_pop_state_cleanup(LttvProcessState *process,
 320     LttvTracefileState *tfs);
 321
 322 #define LTTV_TRACEFILE_STATE_TYPE  (lttv_tracefile_state_get_type ())
 323 #define LTTV_TRACEFILE_STATE(obj)  (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
 324 #define LTTV_TRACEFILE_STATE_CLASS(vtable)  (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
 325 #define LTTV_IS_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_TRACEFILE_STATE_TYPE))
 326 #define LTTV_IS_TRACEFILE_STATE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_TRACEFILE_STATE_TYPE))
 327 #define LTTV_TRACEFILE_STATE_GET_CLASS(inst)  (G_TYPE_INSTANCE_GET_CLASS ((inst), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileStateClass))
 328
 329 struct _LttvTracefileState {
 330   LttvTracefileContext parent;
 331
 332   //LttvProcessState *process;
 333   GQuark tracefile_name;
 334   guint cpu;  /* Current cpu of the tracefile */
 335 //  guint saved_position;
 336 };
 337
 338 struct _LttvTracefileStateClass {
 339   LttvTracefileContextClass parent;
 340 };
 341
 342 GType lttv_tracefile_state_get_type (void);
 343
 344 static inline guint lttv_state_get_target_pid(LttvTracefileState *tfs)
 345 {
 346   LttvTraceState *ts = (LttvTraceState*)tfs->parent.t_context;
 347   guint cpu = tfs->cpu;
 348   LttvProcessState *process = ts->running_process[cpu];
 349
 350   if(tfs->parent.target_pid >= 0) return tfs->parent.target_pid;
 351   else return process->pid;
 352 }
 353
 354
 355 #define HDR_PROCESS 0
 356 #define HDR_ES 1
 357 #define HDR_USER_STACK 2
 358 #define HDR_USERTRACE 3
 359 #define HDR_PROCESS_STATE 4
 360 #define HDR_CPU 5
 361 #define HDR_TRACEFILE 6
 362 #define HDR_TRACESET 7
 363 #define HDR_TRACE 8
 364 #define HDR_QUARKS 9
 365 #define HDR_QUARK 10
 366
 367
 368
 369 #endif // STATE_H