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uprobes/core: Clean up, refactor and improve the code

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Make the uprobes code readable to me:

 - improve the Kconfig text so that a mere mortal gets some idea
   what CONFIG_UPROBES=y is really about

 - do trivial renames to standardize around the uprobes_*() namespace

 - clean up and simplify various code flow details

 - separate basic blocks of functionality

 - line break artifact and white space related removal

 - use standard local varible definition blocks

 - use vertical spacing to make things more readable

 - remove unnecessary volatile

 - restructure comment blocks to make them more uniform and
   more readable in general

Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Anton Arapov <anton@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Link: http://lkml.kernel.org/n/tip-ewbwhb8o6navvllsauu7k07p@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2012-02-17 09:27:41 +01:00
parent 2b14449835
commit 7b2d81d48a
6 changed files with 233 additions and 186 deletions
Download patch file Download diff file Expand all files Collapse all files

28
include/linux/uprobes.h
View file

@ -1,7 +1,7 @@
#ifndef _LINUX_UPROBES_H
#define _LINUX_UPROBES_H
/*
* Userspace Probes (UProbes)
* User-space Probes (UProbes)
*
* 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
@ -40,8 +40,10 @@ struct uprobe_arch_info {};
#define uprobe_opcode_sz sizeof(uprobe_opcode_t)
/* flags that denote/change uprobes behaviour */
/* Have a copy of original instruction */
#define UPROBES_COPY_INSN 0x1
/* Dont run handlers when first register/ last unregister in progress*/
#define UPROBES_RUN_HANDLER 0x2
@ -70,27 +72,23 @@ struct uprobe {
};
#ifdef CONFIG_UPROBES
extern int __weak set_bkpt(struct mm_struct *mm, struct uprobe *uprobe,
unsigned long vaddr);
extern int __weak set_orig_insn(struct mm_struct *mm, struct uprobe *uprobe,
unsigned long vaddr, bool verify);
extern int __weak set_bkpt(struct mm_struct *mm, struct uprobe *uprobe, unsigned long vaddr);
extern int __weak set_orig_insn(struct mm_struct *mm, struct uprobe *uprobe, unsigned long vaddr, bool verify);
extern bool __weak is_bkpt_insn(uprobe_opcode_t *insn);
extern int register_uprobe(struct inode *inode, loff_t offset,
struct uprobe_consumer *consumer);
extern void unregister_uprobe(struct inode *inode, loff_t offset,
struct uprobe_consumer *consumer);
extern int mmap_uprobe(struct vm_area_struct *vma);
extern int uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer);
extern void uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer);
extern int uprobe_mmap(struct vm_area_struct *vma);
#else /* CONFIG_UPROBES is not defined */
static inline int register_uprobe(struct inode *inode, loff_t offset,
struct uprobe_consumer *consumer)
static inline int
uprobe_register(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer)
{
return -ENOSYS;
}
static inline void unregister_uprobe(struct inode *inode, loff_t offset,
struct uprobe_consumer *consumer)
static inline void
uprobe_unregister(struct inode *inode, loff_t offset, struct uprobe_consumer *consumer)
{
}
static inline int mmap_uprobe(struct vm_area_struct *vma)
static inline int uprobe_mmap(struct vm_area_struct *vma)
{
return 0;
}