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-rw-r--r--module/sysprof-module.c282
1 files changed, 0 insertions, 282 deletions
diff --git a/module/sysprof-module.c b/module/sysprof-module.c
deleted file mode 100644
index 77e1e06..0000000
--- a/module/sysprof-module.c
+++ /dev/null
@@ -1,282 +0,0 @@
-/* -*- c-basic-offset: 8 -*- */
-
-/* Sysprof -- Sampling, systemwide CPU profiler
- * Copyright 2004, Red Hat, Inc.
- * Copyright 2004, 2005, 2006, 2007, 2008, Soeren Sandmann
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- */
-
-#ifdef CONFIG_SMP
-# define __SMP__
-#endif
-#include <asm/atomic.h>
-#include <linux/kernel.h> /* Needed for KERN_ALERT */
-#include <linux/module.h> /* Needed by all modules */
-#include <linux/sched.h>
-
-#include <linux/proc_fs.h>
-#include <asm/uaccess.h>
-#include <linux/poll.h>
-#include <linux/highmem.h>
-#include <linux/pagemap.h>
-#include <linux/profile.h>
-
-#include "sysprof-module.h"
-
-#include "../config.h"
-
-#include <linux/version.h>
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,18)
-#include <linux/config.h>
-#endif
-
-#if !CONFIG_PROFILING
-# error Sysprof needs a kernel with profiling support compiled in.
-#endif
-
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
-# error Sysprof needs a Linux 2.6.11 kernel or later
-#endif
-#include <linux/kallsyms.h>
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Soeren Sandmann (sandmann@daimi.au.dk)");
-
-#define SAMPLES_PER_SECOND (200)
-#define INTERVAL ((HZ <= SAMPLES_PER_SECOND)? 1 : (HZ / SAMPLES_PER_SECOND))
-#define N_TRACES 256
-
-static SysprofStackTrace stack_traces[N_TRACES];
-static SysprofStackTrace * head = &stack_traces[0];
-static SysprofStackTrace * tail = &stack_traces[0];
-DECLARE_WAIT_QUEUE_HEAD (wait_for_trace);
-DECLARE_WAIT_QUEUE_HEAD (wait_for_exit);
-
-/* Macro the names of the registers that are used on each architecture */
-#if !defined(CONFIG_X86_64) && !defined(CONFIG_X86)
-# error Sysprof only supports the i386 and x86-64 architectures
-#endif
-
-#if LINUX_VERSION_CODE >= KERNEL_VERSION (2,6,25)
-# define REG_FRAME_PTR bp
-# define REG_INS_PTR ip
-# define REG_STACK_PTR sp
-# define REG_STACK_PTR0 sp0
-#else
-# if defined(CONFIG_X86_64)
-# define REG_FRAME_PTR rbp
-# define REG_INS_PTR rip
-# define REG_STACK_PTR rsp
-# define REG_STACK_PTR0 rsp0
-# else
-# define REG_FRAME_PTR ebp
-# define REG_INS_PTR eip
-# define REG_STACK_PTR esp
-# define REG_STACK_PTR0 esp0
-# endif
-#endif
-
-typedef struct userspace_reader userspace_reader;
-struct userspace_reader
-{
- struct task_struct *task;
- unsigned long cache_address;
- unsigned long *cache;
-};
-
-typedef struct StackFrame StackFrame;
-struct StackFrame {
- unsigned long next;
- unsigned long return_address;
-};
-
-struct work_struct work;
-
-static int
-read_frame (void *frame_pointer, StackFrame *frame)
-{
-#if 0
- /* This is commented out because we seem to be called with
- * (current_thread_info()->addr_limit.seg)) == 0
- * which means access_ok() _always_ fails.
- *
- * Not sure why (or if) this isn't the case for oprofile
- */
- if (!access_ok(VERIFY_READ, frame_pointer, sizeof(StackFrame)))
- return 1;
-#endif
-
- if (__copy_from_user_inatomic (
- frame, frame_pointer, sizeof (StackFrame)))
- return 1;
-
- return 0;
-}
-
-DEFINE_PER_CPU(int, n_samples);
-
-static int
-timer_notify (struct pt_regs *regs)
-{
- SysprofStackTrace *trace = head;
- int i;
- int is_user;
- static atomic_t in_timer_notify = ATOMIC_INIT(1);
- int n;
-
- n = ++get_cpu_var(n_samples);
- put_cpu_var(n_samples);
-
- if (n % INTERVAL != 0)
- return 0;
-
- /* 0: locked, 1: unlocked */
-
- if (!atomic_dec_and_test(&in_timer_notify))
- goto out;
-
- is_user = user_mode(regs);
-
- if (!current || current->pid == 0)
- goto out;
-
- if (is_user && current->state != TASK_RUNNING)
- goto out;
-
- if (!is_user)
- {
- /* kernel */
-
- trace->pid = current->pid;
- trace->truncated = 0;
- trace->n_addresses = 1;
-
- /* 0x1 is taken by sysprof to mean "in kernel" */
- trace->addresses[0] = (void *)0x1;
- }
- else
- {
- StackFrame *frame_pointer;
- StackFrame frame;
- memset(trace, 0, sizeof (SysprofStackTrace));
-
- trace->pid = current->pid;
- trace->truncated = 0;
-
- i = 0;
-
- trace->addresses[i++] = (void *)regs->REG_INS_PTR;
-
- frame_pointer = (void *)regs->REG_FRAME_PTR;
-
- while (read_frame (frame_pointer, &frame) == 0 &&
- i < SYSPROF_MAX_ADDRESSES &&
- (unsigned long)frame_pointer >= regs->REG_STACK_PTR)
- {
- trace->addresses[i++] = (void *)frame.return_address;
- frame_pointer = (StackFrame *)frame.next;
- }
-
- trace->n_addresses = i;
-
- if (i == SYSPROF_MAX_ADDRESSES)
- trace->truncated = 1;
- else
- trace->truncated = 0;
- }
-
- if (head++ == &stack_traces[N_TRACES - 1])
- head = &stack_traces[0];
-
- wake_up (&wait_for_trace);
-
-out:
- atomic_inc(&in_timer_notify);
- return 0;
-}
-
-static int
-procfile_read(char *buffer,
- char **buffer_location,
- off_t offset,
- int buffer_len,
- int *eof,
- void *data)
-{
- if (head == tail)
- return -EWOULDBLOCK;
-
- *buffer_location = (char *)tail;
-
- BUG_ON(tail->pid == 0);
-
- if (tail++ == &stack_traces[N_TRACES - 1])
- tail = &stack_traces[0];
-
- return sizeof (SysprofStackTrace);
-}
-
-struct proc_dir_entry *trace_proc_file;
-static unsigned int
-procfile_poll(struct file *filp, poll_table *poll_table)
-{
- if (head != tail)
- return POLLIN | POLLRDNORM;
-
- poll_wait(filp, &wait_for_trace, poll_table);
-
- if (head != tail)
- return POLLIN | POLLRDNORM;
-
- return 0;
-}
-
-int
-init_module(void)
-{
- static struct file_operations fops;
-
- trace_proc_file =
- create_proc_entry ("sysprof-trace", S_IFREG | S_IRUGO, NULL);
-
- if (!trace_proc_file)
- return 1;
-
- fops = *trace_proc_file->proc_fops;
- fops.poll = procfile_poll;
-
- trace_proc_file->read_proc = procfile_read;
- trace_proc_file->proc_fops = &fops;
- trace_proc_file->size = sizeof (SysprofStackTrace);
-
- register_timer_hook (timer_notify);
-
- printk(KERN_ALERT "sysprof: loaded (%s)\n", PACKAGE_VERSION);
-
- return 0;
-}
-
-void
-cleanup_module(void)
-{
- unregister_timer_hook (timer_notify);
-
- remove_proc_entry("sysprof-trace", NULL);
-
- printk(KERN_ALERT "sysprof: unloaded\n");
-}
-
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