+/* This file is part of the Linux Trace Toolkit viewer
+ * Copyright (C) 2003-2004 Michel Dagenais
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA 02111-1307, USA.
+ */
+
#ifndef STATE_H
#define STATE_H
#include <glib.h>
#include <lttv/processTrace.h>
+#include <stdio.h>
-/* The operating system state kept during the trace analysis
+/* The operating system state, kept during the trace analysis,
contains a subset of the real operating system state,
sufficient for the analysis, and possibly organized quite differently.
and LttvTracefileContext objects, used by processTrace, through
subtyping. The context objects already reflect the multiple tracefiles
(one per cpu) per trace and multiple traces per trace set. The state
- objects defined here simply add fields to the relevant context objects. */
+ objects defined here simply add fields to the relevant context objects.
+ There is no traceset specific state yet. It may eventually contains such
+ things as clock differences over time.
-/* The LttvProcessState structure defines the current state for each process.
- A process can make system calls (in some rare cases nested) and receive
- interrupts/faults. For instance, a process may issue a system call,
- generate a page fault while reading an argument from user space, and
- get caught by an interrupt. To represent these nested states, an
- interrupt stack is maintained. The stack bottom is normal user mode and
- the top of stack is the current interrupt state.
+ The trace state currently consists in a process table.
- The interrupt state tells about the process status, interrupt type and
- interrupt number. All these could be defined as enumerations but may
- need extensions (e.g. new process state). GQuark are thus used being
- as easy to manipulate as integers but having a string associated, just
- like enumerations. */
+ The tracefile level state relates to the associated cpu. It contains the
+ position of the current event in the tracefile (since the state depends on
+ which events have been processed) and a pointer to the current process,
+ in the process table, being run on that cpu.
+ For each process in the process table, various informations such as exec
+ file name, pid, ppid and creation time are stored. Each process state also
+ contains an execution mode stack (e.g. irq within system call, called
+ from user mode). */
typedef struct _LttvTracesetState LttvTracesetState;
typedef struct _LttvTracesetStateClass LttvTracesetStateClass;
typedef struct _LttvTracefileState LttvTracefileState;
typedef struct _LttvTracefileStateClass LttvTracefileStateClass;
-gboolean lttv_state_add_event_hooks(LttvTracesetState *self);
+void lttv_state_add_event_hooks(LttvTracesetState *self);
-gboolean lttv_state_remove_event_hooks(LttvTracesetState *self);
+void lttv_state_remove_event_hooks(LttvTracesetState *self);
+
+void lttv_state_save_add_event_hooks(LttvTracesetState *self);
+
+void lttv_state_save_remove_event_hooks(LttvTracesetState *self);
+
+void lttv_state_traceset_seek_time_closest(LttvTracesetState *self, LttTime t);
+
+/* The LttvProcessState structure defines the current state for each process.
+ A process can make system calls (in some rare cases nested) and receive
+ interrupts/faults. For instance, a process may issue a system call,
+ generate a page fault while reading an argument from user space, and
+ get caught by an interrupt. To represent these nested states, an
+ execution mode stack is maintained. The stack bottom is normal user mode
+ and the top of stack is the current execution mode.
+ The execution mode stack tells about the process status, execution mode and
+ submode (interrupt, system call or IRQ number). All these could be
+ defined as enumerations but may need extensions (e.g. new process state).
+ GQuark are thus used. They are as easy to manipulate as integers but have
+ a string associated, just like enumerations.
-/* The interrupt type is one of "user mode", "kernel thread", "system call",
+ The execution mode is one of "user mode", "kernel thread", "system call",
"interrupt request", "fault". */
-typedef GQuark LttvInterruptType;
+typedef GQuark LttvExecutionMode;
-extern LttvInterruptType
+extern LttvExecutionMode
LTTV_STATE_USER_MODE,
LTTV_STATE_SYSCALL,
LTTV_STATE_TRAP,
- LTTV_STATE_IRQ;
+ LTTV_STATE_IRQ,
+ LTTV_STATE_MODE_UNKNOWN;
-/* The interrupt number depends on the interrupt type. For user mode or kernel
- thread, which are the normal mode (interrupt stack bottom), it is set to
- "none". For interrupt requests, faults and system calls, it is set
- respectively to the interrupt name (e.g. "timer"), fault name
+/* The submode number depends on the execution mode. For user mode or kernel
+ thread, which are the normal mode (execution mode stack bottom),
+ it is set to "none". For interrupt requests, faults and system calls,
+ it is set respectively to the interrupt name (e.g. "timer"), fault name
(e.g. "page fault"), and system call name (e.g. "select"). */
-typedef GQuark LttvInterruptNumber;
+typedef GQuark LttvExecutionSubmode;
+extern LttvExecutionSubmode
+ LTTV_STATE_SUBMODE_NONE,
+ LTTV_STATE_SUBMODE_UNKNOWN;
/* The process status is one of "running", "wait-cpu" (runnable), or "wait-*"
where "*" describes the resource waited for (e.g. timer, process,
LTTV_STATE_RUN;
-typedef struct _LttvInterruptState {
- LttvInterruptType t;
- LttvInterruptNumber n;
- LttvTime entry;
- LttvTime last_change;
+typedef struct _LttvExecutionState {
+ LttvExecutionMode t;
+ LttvExecutionSubmode n;
+ LttTime entry;
+ LttTime change;
LttvProcessStatus s;
-} LttvInterruptState;
+} LttvExecutionState;
typedef struct _LttvProcessState {
guint pid;
- LttvTime birth;
+ guint ppid;
+ LttTime creation_time;
+ LttTime insertion_time;
GQuark name;
- GArray *interrupt_stack; /* Array of LttvInterruptState */
- LttvInterruptState *state; /* Top of interrupt stack */
- /* opened file descriptors, address map... */
+ GQuark pid_time;
+ GArray *execution_stack; /* Array of LttvExecutionState */
+ LttvExecutionState *state; /* Top of interrupt stack */
+ GQuark last_cpu; /* Last CPU where process was scheduled */
+ /* opened file descriptors, address map?... */
} LttvProcessState;
+LttvProcessState *
+lttv_state_find_process(LttvTracefileState *tfs, guint pid);
+
+LttvProcessState *
+lttv_state_find_process_from_trace(LttvTraceState *ts, GQuark cpu, guint pid);
+
+LttvProcessState *
+lttv_state_find_process_or_create(LttvTracefileState *tfs, guint pid);
+
+LttvProcessState *
+lttv_state_create_process(LttvTracefileState *tfs, LttvProcessState *parent,
+ guint pid);
+
+void lttv_state_write(LttvTraceState *self, LttTime t, FILE *fp);
+
/* The LttvTracesetState, LttvTraceState and LttvTracefileState types
inherit from the corresponding Context objects defined in processTrace. */
LttvTraceContext parent;
GHashTable *processes; /* LttvProcessState objects indexed by pid */
+ guint nb_event, save_interval;
/* Block/char devices, locks, memory pages... */
+ GQuark *eventtype_names;
+ GQuark *syscall_names;
+ GQuark *trap_names;
+ GQuark *irq_names;
+ LttTime *max_time_state_recomputed_in_seek;
};
struct _LttvTraceStateClass {
LttvTraceContextClass parent;
+
+ void (*state_save) (LttvTraceState *self, LttvAttribute *container);
+ void (*state_restore) (LttvTraceState *self, LttvAttribute *container);
+ void (*state_saved_free) (LttvTraceState *self, LttvAttribute *container);
};
GType lttv_trace_state_get_type (void);
+void lttv_state_save(LttvTraceState *self, LttvAttribute *container);
+
+void lttv_state_restore(LttvTraceState *self, LttvAttribute *container);
+
+void lttv_state_state_saved_free(LttvTraceState *self,
+ LttvAttribute *container);
+
#define LTTV_TRACEFILE_STATE_TYPE (lttv_tracefile_state_get_type ())
#define LTTV_TRACEFILE_STATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_TRACEFILE_STATE_TYPE, LttvTracefileState))
LttvTracefileContext parent;
LttvProcessState *process;
+ GQuark cpu_name;
+ guint saved_position;
};
struct _LttvTracefileStateClass {
GType lttv_tracefile_state_get_type (void);
-#endif // PROCESSTRACE_H
+#endif // STATE_H
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