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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
/*
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* call-path.h: Manipulate a tree data structure containing function call paths
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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*/
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#ifndef __PERF_CALL_PATH_H
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#define __PERF_CALL_PATH_H
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#include <sys/types.h>
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#include <linux/types.h>
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#include <linux/rbtree.h>
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/**
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* struct call_path - node in list of calls leading to a function call.
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* @parent: call path to the parent function call
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* @sym: symbol of function called
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* @ip: only if sym is null, the ip of the function
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* @db_id: id used for db-export
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* @in_kernel: whether function is a in the kernel
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* @rb_node: node in parent's tree of called functions
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* @children: tree of call paths of functions called
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*
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* In combination with the call_return structure, the call_path structure
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* defines a context-sensitve call-graph.
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*/
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struct call_path {
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struct call_path *parent;
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struct symbol *sym;
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u64 ip;
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u64 db_id;
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bool in_kernel;
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struct rb_node rb_node;
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struct rb_root children;
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};
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#define CALL_PATH_BLOCK_SHIFT 8
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#define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT)
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#define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1)
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struct call_path_block {
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struct call_path cp[CALL_PATH_BLOCK_SIZE];
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struct list_head node;
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};
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/**
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* struct call_path_root - root of all call paths.
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* @call_path: root call path
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* @blocks: list of blocks to store call paths
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* @next: next free space
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* @sz: number of spaces
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*/
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struct call_path_root {
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struct call_path call_path;
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struct list_head blocks;
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size_t next;
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size_t sz;
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};
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struct call_path_root *call_path_root__new(void);
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void call_path_root__free(struct call_path_root *cpr);
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struct call_path *call_path__findnew(struct call_path_root *cpr,
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struct call_path *parent,
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struct symbol *sym, u64 ip, u64 ks);
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#endif
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