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7efbcc8c07
Some x86 microarchitectures fuse a subset of cmp/test/ALU instructions
with branch instructions, and thus perf annotate highlight such valid
pairs as fused.
When annotated with source, perf uses struct disasm_line to contain
either source or instruction line from objdump output. Usually, a C
statement generates multiple instructions which include such
cmp/test/ALU + branch instruction pairs. But in case of assembly
function, each individual assembly source line generate one
instruction.
The 'perf annotate' instruction fusion logic assumes the previous
disasm_line as the previous instruction line, which is wrong because,
for assembly function, previous disasm_line contains source line. And
thus perf fails to highlight valid fused instruction pairs for assembly
functions.
Fix it by searching backward until we find an instruction line and
consider that disasm_line as fused with current branch instruction.
Before:
│ cmpq %rcx, RIP+8(%rsp)
0.00 │ cmp %rcx,0x88(%rsp)
│ je .Lerror_bad_iret <--- Source line
0.14 │ ┌──je b4 <--- Instruction line
│ │movl %ecx, %eax
After:
│ cmpq %rcx, RIP+8(%rsp)
0.00 │ ┌──cmp %rcx,0x88(%rsp)
│ │je .Lerror_bad_iret
0.14 │ ├──je b4
│ │movl %ecx, %eax
Reviewed-by: Jin Yao <yao.jin@linux.intel.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kim Phillips <kim.phillips@amd.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https //lore.kernel.org/r/20210911043854.8373-1-ravi.bangoria@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
86 lines
3.7 KiB
C
86 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _PERF_UI_BROWSER_H_
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#define _PERF_UI_BROWSER_H_ 1
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#include <linux/types.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#define HE_COLORSET_TOP 50
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#define HE_COLORSET_MEDIUM 51
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#define HE_COLORSET_NORMAL 52
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#define HE_COLORSET_SELECTED 53
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#define HE_COLORSET_JUMP_ARROWS 54
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#define HE_COLORSET_ADDR 55
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#define HE_COLORSET_ROOT 56
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struct ui_browser {
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u64 index, top_idx;
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void *top, *entries;
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u16 y, x, width, height, rows, columns, horiz_scroll;
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u8 extra_title_lines;
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int current_color;
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void *priv;
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const char *title;
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char *helpline;
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const char *no_samples_msg;
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void (*refresh_dimensions)(struct ui_browser *browser);
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unsigned int (*refresh)(struct ui_browser *browser);
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void (*write)(struct ui_browser *browser, void *entry, int row);
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void (*seek)(struct ui_browser *browser, off_t offset, int whence);
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bool (*filter)(struct ui_browser *browser, void *entry);
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u32 nr_entries;
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bool navkeypressed;
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bool use_navkeypressed;
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};
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int ui_browser__set_color(struct ui_browser *browser, int color);
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void ui_browser__set_percent_color(struct ui_browser *browser,
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double percent, bool current);
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bool ui_browser__is_current_entry(struct ui_browser *browser, unsigned row);
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void ui_browser__refresh_dimensions(struct ui_browser *browser);
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void ui_browser__reset_index(struct ui_browser *browser);
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void ui_browser__gotorc_title(struct ui_browser *browser, int y, int x);
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void ui_browser__gotorc(struct ui_browser *browser, int y, int x);
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void ui_browser__write_nstring(struct ui_browser *browser, const char *msg,
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unsigned int width);
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void ui_browser__vprintf(struct ui_browser *browser, const char *fmt, va_list args);
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void ui_browser__printf(struct ui_browser *browser, const char *fmt, ...);
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void ui_browser__write_graph(struct ui_browser *browser, int graph);
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void __ui_browser__line_arrow(struct ui_browser *browser, unsigned int column,
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u64 start, u64 end);
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void ui_browser__mark_fused(struct ui_browser *browser, unsigned int column,
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unsigned int row, int diff, bool arrow_down);
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void __ui_browser__show_title(struct ui_browser *browser, const char *title);
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void ui_browser__show_title(struct ui_browser *browser, const char *title);
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int ui_browser__show(struct ui_browser *browser, const char *title,
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const char *helpline, ...);
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void ui_browser__hide(struct ui_browser *browser);
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int ui_browser__refresh(struct ui_browser *browser);
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int ui_browser__run(struct ui_browser *browser, int delay_secs);
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void ui_browser__update_nr_entries(struct ui_browser *browser, u32 nr_entries);
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void ui_browser__handle_resize(struct ui_browser *browser);
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void __ui_browser__vline(struct ui_browser *browser, unsigned int column,
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u16 start, u16 end);
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int ui_browser__warning(struct ui_browser *browser, int timeout,
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const char *format, ...);
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int ui_browser__help_window(struct ui_browser *browser, const char *text);
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bool ui_browser__dialog_yesno(struct ui_browser *browser, const char *text);
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int ui_browser__input_window(const char *title, const char *text, char *input,
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const char *exit_msg, int delay_sec);
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struct perf_env;
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int tui__header_window(struct perf_env *env);
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void ui_browser__argv_seek(struct ui_browser *browser, off_t offset, int whence);
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unsigned int ui_browser__argv_refresh(struct ui_browser *browser);
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void ui_browser__rb_tree_seek(struct ui_browser *browser, off_t offset, int whence);
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unsigned int ui_browser__rb_tree_refresh(struct ui_browser *browser);
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void ui_browser__list_head_seek(struct ui_browser *browser, off_t offset, int whence);
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unsigned int ui_browser__list_head_refresh(struct ui_browser *browser);
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void ui_browser__init(void);
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#endif /* _PERF_UI_BROWSER_H_ */
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