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Delete lots of commented-out code.
Mon Oct 10 22:49:03 2005 Soeren Sandmann <sandmann@redhat.com> * module/sysprof-module.c: Delete lots of commented-out code.
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Soeren Sandmann
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Søren Sandmann Pedersen
Søren Sandmann Pedersen
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f910d769ed
commit
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@ -1,3 +1,7 @@
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Mon Oct 10 22:49:03 2005 Soeren Sandmann <sandmann@redhat.com>
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* module/sysprof-module.c: Delete lots of commented-out code.
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Mon Oct 10 14:33:50 2005 Søren Sandmann <sandmann@redhat.com>
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* configure.ac: Add --disable-kernel-module option. Patch from
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@ -70,13 +70,6 @@ DECLARE_WAIT_QUEUE_HEAD (wait_for_exit);
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# error Sysprof only supports the i386 and x86-64 architectures
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#endif
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#if 0
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static void on_timer(unsigned long);
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#endif
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#if 0
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static struct timer_list timer;
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#endif
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typedef struct userspace_reader userspace_reader;
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struct userspace_reader
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{
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@ -85,101 +78,6 @@ struct userspace_reader
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unsigned long *cache;
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};
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#if 0
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/* This function was mostly cutted and pasted from ptrace.c
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*/
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/* Access another process' address space.
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* Source/target buffer must be kernel space,
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* Do not walk the page table directly, use get_user_pages
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*/
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static struct mm_struct *
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get_mm (struct task_struct *tsk)
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{
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
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struct mm_struct *mm;
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task_lock (tsk);
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mm = tsk->mm;
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task_unlock (tsk);
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return mm;
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#else
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return get_task_mm (tsk);
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#endif
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}
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static void
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put_mm (struct mm_struct *mm)
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{
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,9)
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mmput(mm);
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#endif
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}
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#endif
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#if 0
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static int
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x_access_process_vm (struct task_struct *tsk,
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unsigned long addr,
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void *buf, int len, int write)
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{
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struct mm_struct *mm;
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struct vm_area_struct *vma;
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struct page *page;
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void *old_buf = buf;
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mm = get_mm (tsk);
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if (!mm)
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return 0;
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down_read(&mm->mmap_sem);
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/* ignore errors, just check how much was sucessfully transfered */
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while (len)
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{
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int bytes, ret, offset;
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void *maddr;
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ret = get_user_pages(tsk, mm, addr, 1,
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write, 1, &page, &vma);
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if (ret <= 0) {
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break;
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}
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bytes = len;
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offset = addr & (PAGE_SIZE-1);
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if (bytes > PAGE_SIZE-offset)
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bytes = PAGE_SIZE-offset;
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#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
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flush_cache_page(vma, addr);
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#endif
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maddr = kmap(page);
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if (write) {
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copy_to_user_page(vma, page, addr,
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maddr + offset, buf, bytes);
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set_page_dirty_lock(page);
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} else {
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copy_from_user_page(vma, page, addr,
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buf, maddr + offset, bytes);
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}
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kunmap(page);
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page_cache_release(page);
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len -= bytes;
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buf += bytes;
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addr += bytes;
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}
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up_read(&mm->mmap_sem);
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put_mm (mm);
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return buf - old_buf;
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}
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#endif
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#if 0
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static int
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init_userspace_reader (userspace_reader *reader,
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@ -286,120 +184,8 @@ read_frame (userspace_reader *reader, unsigned long addr, StackFrame *frame)
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}
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#endif
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#if 0
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static struct pt_regs *
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get_regs (struct task_struct *task)
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{
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/* This seems to work in Linux 2.6.11 */
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void *stack_top = (void *)task->thread.esp0;
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return stack_top - sizeof(struct pt_regs);
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#if 0
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/* This used to work, but doesn't anymore */
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return ((struct pt_regs *) (THREAD_SIZE + (unsigned long) task->thread_info)) - 1;
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#endif
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#if 0
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/* One might suspect that this would work, but it doesn't
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*/
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return task_pt_regs (task);
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#endif
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}
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#endif
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#if 0
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static void
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generate_stack_trace(struct task_struct *task,
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SysprofStackTrace *trace)
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{
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struct pt_regs *regs = get_regs (task); // task->thread.regs;
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StackFrame frame;
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unsigned long addr;
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userspace_reader reader;
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int i;
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memset(trace, 0, sizeof (SysprofStackTrace));
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trace->pid = task->pid;
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trace->truncated = 0;
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trace->addresses[0] = (void *)regs->REG_INS_PTR;
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i = 1;
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addr = regs->REG_FRAME_PTR;
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#if 0
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printk (KERN_ALERT "frame pointer: %p\n", regs->REG_FRAME_PTR);
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#endif
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if (init_userspace_reader (&reader, task))
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{
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while (i < SYSPROF_MAX_ADDRESSES &&
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read_frame (&reader, addr, &frame) &&
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addr < START_OF_STACK && addr >= regs->REG_STACK_PTR)
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{
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trace->addresses[i++] = (void *)frame.return_address;
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addr = frame.next;
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}
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done_userspace_reader (&reader);
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}
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trace->n_addresses = i;
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if (i == SYSPROF_MAX_ADDRESSES)
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trace->truncated = 1;
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else
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trace->truncated = 0;
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}
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#endif
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#if 0
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static void
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do_generate (void *data)
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{
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struct task_struct *task = data;
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generate_stack_trace(task, head);
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if (head++ == &stack_traces[N_TRACES - 1])
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head = &stack_traces[0];
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wake_up (&wait_for_trace);
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/* If a task dies between the time we see it in on_timer and
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* the time we get here, it will be leaked. If __put_task_struct9)
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* was exported, then we could do this properly
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*/
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atomic_dec (&(task)->usage);
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mod_timer(&timer, jiffies + INTERVAL);
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}
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#endif
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struct work_struct work;
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#if 0
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static void
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on_timer(unsigned long dong)
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{
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if (current && current->state == TASK_RUNNING && current->pid != 0)
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{
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get_task_struct (current);
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INIT_WORK (&work, do_generate, current);
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schedule_work (&work);
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}
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else
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{
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mod_timer(&timer, jiffies + INTERVAL);
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}
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}
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#endif
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/**
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* pages_present() from OProfile
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*
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@ -541,12 +327,6 @@ init_module(void)
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register_timer_hook (timer_notify);
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#if 0
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init_timer(&timer);
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timer.function = on_timer;
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mod_timer(&timer, jiffies + INTERVAL);
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#endif
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printk(KERN_ALERT "sysprof: loaded\n");
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return 0;
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@ -555,10 +335,6 @@ init_module(void)
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void
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cleanup_module(void)
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{
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#if 0
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del_timer (&timer);
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#endif
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unregister_timer_hook (timer_notify);
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remove_proc_entry("sysprof-trace", &proc_root);
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