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Subject[PATCH 28/47] perf tests: Adjust the vmlinux symtab matches kallsyms test
Date
From: Adrian Hunter <adrian.hunter@intel.com>

The vmlinux maps now map to the dso and the symbol values are now file
offsets. For comparison with kallsyms the virtual memory address is
needed which is obtained by unmapping the symbol value.

The "vmlinux symtab matches kallsyms" is adjusted accordingly.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1375875537-4509-5-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/vmlinux-kallsyms.c | 32 +++++++++++++++++++++-----------
1 file changed, 21 insertions(+), 11 deletions(-)

diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c
index add1539..e2e1498 100644
--- a/tools/perf/tests/vmlinux-kallsyms.c
+++ b/tools/perf/tests/vmlinux-kallsyms.c
@@ -25,6 +25,7 @@ int test__vmlinux_matches_kallsyms(void)
struct machine kallsyms, vmlinux;
enum map_type type = MAP__FUNCTION;
struct ref_reloc_sym ref_reloc_sym = { .name = "_stext", };
+ u64 mem_start, mem_end;

/*
* Step 1:
@@ -123,10 +124,14 @@ int test__vmlinux_matches_kallsyms(void)
if (sym->start == sym->end)
continue;

- first_pair = machine__find_kernel_symbol(&kallsyms, type, sym->start, NULL, NULL);
+ mem_start = vmlinux_map->unmap_ip(vmlinux_map, sym->start);
+ mem_end = vmlinux_map->unmap_ip(vmlinux_map, sym->end);
+
+ first_pair = machine__find_kernel_symbol(&kallsyms, type,
+ mem_start, NULL, NULL);
pair = first_pair;

- if (pair && pair->start == sym->start) {
+ if (pair && pair->start == mem_start) {
next_pair:
if (strcmp(sym->name, pair->name) == 0) {
/*
@@ -138,10 +143,11 @@ next_pair:
* off the real size. More than that and we
* _really_ have a problem.
*/
- s64 skew = sym->end - pair->end;
+ s64 skew = mem_end - pair->end;
if (llabs(skew) >= page_size)
pr_debug("%#" PRIx64 ": diff end addr for %s v: %#" PRIx64 " k: %#" PRIx64 "\n",
- sym->start, sym->name, sym->end, pair->end);
+ mem_start, sym->name, mem_end,
+ pair->end);

/*
* Do not count this as a failure, because we
@@ -159,7 +165,7 @@ detour:
if (nnd) {
struct symbol *next = rb_entry(nnd, struct symbol, rb_node);

- if (next->start == sym->start) {
+ if (next->start == mem_start) {
pair = next;
goto next_pair;
}
@@ -172,10 +178,11 @@ detour:
}

pr_debug("%#" PRIx64 ": diff name v: %s k: %s\n",
- sym->start, sym->name, pair->name);
+ mem_start, sym->name, pair->name);
}
} else
- pr_debug("%#" PRIx64 ": %s not on kallsyms\n", sym->start, sym->name);
+ pr_debug("%#" PRIx64 ": %s not on kallsyms\n",
+ mem_start, sym->name);

err = -1;
}
@@ -208,16 +215,19 @@ detour:
for (nd = rb_first(&vmlinux.kmaps.maps[type]); nd; nd = rb_next(nd)) {
struct map *pos = rb_entry(nd, struct map, rb_node), *pair;

- pair = map_groups__find(&kallsyms.kmaps, type, pos->start);
+ mem_start = vmlinux_map->unmap_ip(vmlinux_map, pos->start);
+ mem_end = vmlinux_map->unmap_ip(vmlinux_map, pos->end);
+
+ pair = map_groups__find(&kallsyms.kmaps, type, mem_start);
if (pair == NULL || pair->priv)
continue;

- if (pair->start == pos->start) {
+ if (pair->start == mem_start) {
pair->priv = 1;
pr_info(" %" PRIx64 "-%" PRIx64 " %" PRIx64 " %s in kallsyms as",
pos->start, pos->end, pos->pgoff, pos->dso->name);
- if (pos->pgoff != pair->pgoff || pos->end != pair->end)
- pr_info(": \n*%" PRIx64 "-%" PRIx64 " %" PRIx64 "",
+ if (mem_end != pair->end)
+ pr_info(":\n*%" PRIx64 "-%" PRIx64 " %" PRIx64,
pair->start, pair->end, pair->pgoff);
pr_info(" %s\n", pair->dso->name);
pair->priv = 1;
--
1.8.1.4


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