mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 04:03:58 +08:00
451db12617
Move the call path handling code out of thread-stack.c and thread-stack.h to allow other components that are not part of thread-stack to create call paths. Summary: - Create call-path.c and call-path.h and add them to the build. - Move all call path related code out of thread-stack.c and thread-stack.h and into call-path.c and call-path.h. - A small subset of structures and functions are now visible through call-path.h, which is required for thread-stack.c to continue to compile. This change is a prerequisite for subsequent patches in this change set and by itself contains no user-visible changes. Signed-off-by: Chris Phlipot <cphlipot0@gmail.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/1461831551-12213-3-git-send-email-cphlipot0@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
|
|
* call-path.h: Manipulate a tree data structure containing function call paths
|
|
* Copyright (c) 2014, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef __PERF_CALL_PATH_H
|
|
#define __PERF_CALL_PATH_H
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/rbtree.h>
|
|
|
|
/**
|
|
* struct call_path - node in list of calls leading to a function call.
|
|
* @parent: call path to the parent function call
|
|
* @sym: symbol of function called
|
|
* @ip: only if sym is null, the ip of the function
|
|
* @db_id: id used for db-export
|
|
* @in_kernel: whether function is a in the kernel
|
|
* @rb_node: node in parent's tree of called functions
|
|
* @children: tree of call paths of functions called
|
|
*
|
|
* In combination with the call_return structure, the call_path structure
|
|
* defines a context-sensitve call-graph.
|
|
*/
|
|
struct call_path {
|
|
struct call_path *parent;
|
|
struct symbol *sym;
|
|
u64 ip;
|
|
u64 db_id;
|
|
bool in_kernel;
|
|
struct rb_node rb_node;
|
|
struct rb_root children;
|
|
};
|
|
|
|
#define CALL_PATH_BLOCK_SHIFT 8
|
|
#define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT)
|
|
#define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1)
|
|
|
|
struct call_path_block {
|
|
struct call_path cp[CALL_PATH_BLOCK_SIZE];
|
|
struct list_head node;
|
|
};
|
|
|
|
/**
|
|
* struct call_path_root - root of all call paths.
|
|
* @call_path: root call path
|
|
* @blocks: list of blocks to store call paths
|
|
* @next: next free space
|
|
* @sz: number of spaces
|
|
*/
|
|
struct call_path_root {
|
|
struct call_path call_path;
|
|
struct list_head blocks;
|
|
size_t next;
|
|
size_t sz;
|
|
};
|
|
|
|
struct call_path_root *call_path_root__new(void);
|
|
void call_path_root__free(struct call_path_root *cpr);
|
|
|
|
struct call_path *call_path__findnew(struct call_path_root *cpr,
|
|
struct call_path *parent,
|
|
struct symbol *sym, u64 ip, u64 ks);
|
|
|
|
#endif
|