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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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935f5a9d45
When a valid vmlinux is not found, 'perf report' falls back to look at
/proc/kcore. In this case, it will report the impossible large offset.
For example:
# perf record -b -e cycles:k find /etc/ > /dev/null
# perf report --stdio --branch-history
22.77% _vm_normal_page+18446603336221188162
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---page_remove_rmap +18446603336221188324
page_remove_rmap +18446603336221188487 (cycles:5)
unlock_page_memcg +18446603336221188096
page_remove_rmap +18446603336221188327 (cycles:1)
The issue is the value which is passed to parameter 'addr' in
__get_srcline() is the objdump address. It's not correct if we calculate
the offset by using 'addr - sym->start'.
This patch creates a new parameter 'ip' in __get_srcline(). It is not
converted to objdump address.
With this patch, the perf report output is:
22.77% _vm_normal_page+66
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---page_remove_rmap +228
page_remove_rmap +391 (cycles:5)
unlock_page_memcg +0
page_remove_rmap +231 (cycles:1)
page_remove_rmap +236
Committer testing:
Make sure you get any valid vmlinux out of the way, using '-v' on the
'perf report' case and deleting it from places where perf searches them,
like your kernel build dir and the build-id cache, in ~/.debug/.
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1514564812-17344-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef PERF_SRCLINE_H
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#define PERF_SRCLINE_H
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include <linux/types.h>
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struct dso;
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struct symbol;
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extern bool srcline_full_filename;
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char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
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bool show_sym, bool show_addr, u64 ip);
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char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
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bool show_sym, bool show_addr, bool unwind_inlines,
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u64 ip);
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void free_srcline(char *srcline);
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/* insert the srcline into the DSO, which will take ownership */
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void srcline__tree_insert(struct rb_root *tree, u64 addr, char *srcline);
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/* find previously inserted srcline */
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char *srcline__tree_find(struct rb_root *tree, u64 addr);
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/* delete all srclines within the tree */
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void srcline__tree_delete(struct rb_root *tree);
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#define SRCLINE_UNKNOWN ((char *) "??:0")
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struct inline_list {
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struct symbol *symbol;
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char *srcline;
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struct list_head list;
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};
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struct inline_node {
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u64 addr;
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struct list_head val;
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struct rb_node rb_node;
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};
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/* parse inlined frames for the given address */
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struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr,
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struct symbol *sym);
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/* free resources associated to the inline node list */
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void inline_node__delete(struct inline_node *node);
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/* insert the inline node list into the DSO, which will take ownership */
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void inlines__tree_insert(struct rb_root *tree, struct inline_node *inlines);
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/* find previously inserted inline node list */
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struct inline_node *inlines__tree_find(struct rb_root *tree, u64 addr);
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/* delete all nodes within the tree of inline_node s */
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void inlines__tree_delete(struct rb_root *tree);
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#endif /* PERF_SRCLINE_H */
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