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authorArnaldo Carvalho de Melo2018-03-23 14:50:35 +0100
committerArnaldo Carvalho de Melo2018-03-23 20:46:18 +0100
commite4cc91b8027dbbb8a1f7c24cdecf58cd0b50375f (patch)
tree10039de12a54dbdc896966ae2a3eded7c7da19d5 /tools/perf/util/annotate.c
parentperf annotate: Add "_local" to jump/offset validation routines (diff)
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perf annotate: Support jumping from one function to another
For instance: entry_SYSCALL_64 /lib/modules/4.16.0-rc5-00086-gdf09348f78dc/build/vmlinux 5.50 │ → callq do_syscall_64 14.56 │ mov 0x58(%rsp),%rcx 7.44 │ mov 0x80(%rsp),%r11 0.32 │ cmp %rcx,%r11 │ → jne swapgs_restore_regs_and_return_to_usermode 0.32 │ shl $0x10,%rcx 0.32 │ sar $0x10,%rcx 3.24 │ cmp %rcx,%r11 │ → jne swapgs_restore_regs_and_return_to_usermode 2.27 │ cmpq $0x33,0x88(%rsp) 1.29 │ → jne swapgs_restore_regs_and_return_to_usermode │ mov 0x30(%rsp),%r11 8.74 │ cmp %r11,0x90(%rsp) │ → jne swapgs_restore_regs_and_return_to_usermode 0.32 │ test $0x10100,%r11 │ → jne swapgs_restore_regs_and_return_to_usermode 0.32 │ cmpq $0x2b,0xa0(%rsp) 0.65 │ → jne swapgs_restore_regs_and_return_to_usermode It'll behave just like a "call" instruction, i.e. press enter or right arrow over one such line and the browser will navigate to the annotated disassembly of that function, which when exited, via left arrow or esc, will come back to the calling function. Now to support jump to an offset on a different function... Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-78o508mqvr8inhj63ddtw7mo@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/annotate.c')
-rw-r--r--tools/perf/util/annotate.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 9524f322f597..5fa270b24eea 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -332,11 +332,10 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op
*
* Actual navigation will come next, with further understanding of how
* the symbol searching and disassembly should be done.
-
+ */
if (map_groups__find_ams(&target) == 0 &&
map__rip_2objdump(target.map, map->map_ip(target.map, target.addr)) == ops->target.addr)
ops->target.sym = target.sym;
- */
if (s++ != NULL) {
ops->target.offset = strtoull(s, NULL, 16);
@@ -356,6 +355,9 @@ static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
if (!ops->target.addr || ops->target.offset < 0)
return ins__raw_scnprintf(ins, bf, size, ops);
+ if (ops->target.outside && ops->target.sym != NULL)
+ return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.sym->name);
+
if (c != NULL) {
const char *c2 = strchr(c + 1, ',');