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authorMilian Wolff <milian.wolff@kdab.com>2017-10-09 22:32:56 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-10-24 09:59:55 -0300
commit40a342cda2cd9bc8f7bf81c5ce1a141584760757 (patch)
tree21f9ebf584f25c45e7fe8bf0280c2d6d9c6cac8a
parent2a704fc8db7b0080a67d9f4f4cb2a7bcaf79949d (diff)
downloadlinux-40a342cda2cd9bc8f7bf81c5ce1a141584760757.tar.bz2
perf callchain: Store srcline in callchain_cursor_node
This is mostly a preparation to enable the creation of full callchain nodes for inline frames. Such frames will reference the IP of the non-inlined frame, but hold the symbol and srcline for an inlined location. As such, we won't be able to query the srcline on-demand based on the IP alone. Instead, we will leverage the functionality provided by this patch here, and store the srcline for the inlined nodes in the new srcline member of callchain_cursor_node. Note that this patch on its own leaks the srcline, as there is no free_callchain_cursor_node or similar. A future patch will add caching of the srcline and handle deletion properly. Signed-off-by: Milian Wolff <milian.wolff@kdab.com> Reviewed-by: Jiri Olsa <jolsa@redhat.com> Reviewed-by: Namhyung Kim <namhyung@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Link: http://lkml.kernel.org/r/20171009203310.17362-3-milian.wolff@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/callchain.c31
-rw-r--r--tools/perf/util/callchain.h6
-rw-r--r--tools/perf/util/machine.c18
3 files changed, 29 insertions, 26 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index a971caf3759d..e7ee794d1e5b 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -566,6 +566,7 @@ fill_node(struct callchain_node *node, struct callchain_cursor *cursor)
call->ip = cursor_node->ip;
call->ms.sym = cursor_node->sym;
call->ms.map = map__get(cursor_node->map);
+ call->srcline = cursor_node->srcline;
if (cursor_node->branch) {
call->branch_count = 1;
@@ -647,20 +648,11 @@ enum match_result {
static enum match_result match_chain_srcline(struct callchain_cursor_node *node,
struct callchain_list *cnode)
{
- char *left = NULL;
- char *right = NULL;
+ const char *left = cnode->srcline;
+ const char *right = node->srcline;
enum match_result ret = MATCH_EQ;
int cmp;
- if (cnode->ms.map)
- left = get_srcline(cnode->ms.map->dso,
- map__rip_2objdump(cnode->ms.map, cnode->ip),
- cnode->ms.sym, true, false);
- if (node->map)
- right = get_srcline(node->map->dso,
- map__rip_2objdump(node->map, node->ip),
- node->sym, true, false);
-
if (left && right)
cmp = strcmp(left, right);
else if (!left && right)
@@ -675,8 +667,6 @@ static enum match_result match_chain_srcline(struct callchain_cursor_node *node,
if (cmp != 0)
ret = cmp < 0 ? MATCH_LT : MATCH_GT;
- free_srcline(left);
- free_srcline(right);
return ret;
}
@@ -969,7 +959,7 @@ merge_chain_branch(struct callchain_cursor *cursor,
list_for_each_entry_safe(list, next_list, &src->val, list) {
callchain_cursor_append(cursor, list->ip,
list->ms.map, list->ms.sym,
- false, NULL, 0, 0, 0);
+ false, NULL, 0, 0, 0, list->srcline);
list_del(&list->list);
map__zput(list->ms.map);
free(list);
@@ -1009,7 +999,8 @@ int callchain_merge(struct callchain_cursor *cursor,
int callchain_cursor_append(struct callchain_cursor *cursor,
u64 ip, struct map *map, struct symbol *sym,
bool branch, struct branch_flags *flags,
- int nr_loop_iter, u64 iter_cycles, u64 branch_from)
+ int nr_loop_iter, u64 iter_cycles, u64 branch_from,
+ const char *srcline)
{
struct callchain_cursor_node *node = *cursor->last;
@@ -1028,6 +1019,7 @@ int callchain_cursor_append(struct callchain_cursor *cursor,
node->branch = branch;
node->nr_loop_iter = nr_loop_iter;
node->iter_cycles = iter_cycles;
+ node->srcline = srcline;
if (flags)
memcpy(&node->branch_flags, flags,
@@ -1115,12 +1107,7 @@ char *callchain_list__sym_name(struct callchain_list *cl,
int printed;
if (cl->ms.sym) {
- if (show_srcline && cl->ms.map && !cl->srcline)
- cl->srcline = get_srcline(cl->ms.map->dso,
- map__rip_2objdump(cl->ms.map,
- cl->ip),
- cl->ms.sym, false, show_addr);
- if (cl->srcline)
+ if (show_srcline && cl->srcline)
printed = scnprintf(bf, bfsize, "%s %s",
cl->ms.sym->name, cl->srcline);
else
@@ -1532,7 +1519,7 @@ int callchain_cursor__copy(struct callchain_cursor *dst,
node->branch, &node->branch_flags,
node->nr_loop_iter,
node->iter_cycles,
- node->branch_from);
+ node->branch_from, node->srcline);
if (rc)
break;
diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 1ed6fc61d0a5..8f67b681cde9 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -121,7 +121,7 @@ struct callchain_list {
u64 iter_count;
u64 iter_cycles;
struct branch_type_stat brtype_stat;
- char *srcline;
+ const char *srcline;
struct list_head list;
};
@@ -135,6 +135,7 @@ struct callchain_cursor_node {
u64 ip;
struct map *map;
struct symbol *sym;
+ const char *srcline;
bool branch;
struct branch_flags branch_flags;
u64 branch_from;
@@ -201,7 +202,8 @@ static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
struct map *map, struct symbol *sym,
bool branch, struct branch_flags *flags,
- int nr_loop_iter, u64 iter_cycles, u64 branch_from);
+ int nr_loop_iter, u64 iter_cycles, u64 branch_from,
+ const char *srcline);
/* Close a cursor writing session. Initialize for the reader */
static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 7c3aa479201a..a37e1c056415 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1709,6 +1709,15 @@ struct mem_info *sample__resolve_mem(struct perf_sample *sample,
return mi;
}
+static char *callchain_srcline(struct map *map, struct symbol *sym, u64 ip)
+{
+ if (!map || callchain_param.key == CCKEY_FUNCTION)
+ return NULL;
+
+ return get_srcline(map->dso, map__rip_2objdump(map, ip),
+ sym, false, callchain_param.key == CCKEY_ADDRESS);
+}
+
struct iterations {
int nr_loop_iter;
u64 cycles;
@@ -1728,6 +1737,7 @@ static int add_callchain_ip(struct thread *thread,
struct addr_location al;
int nr_loop_iter = 0;
u64 iter_cycles = 0;
+ const char *srcline = NULL;
al.filtered = 0;
al.sym = NULL;
@@ -1783,9 +1793,10 @@ static int add_callchain_ip(struct thread *thread,
iter_cycles = iter->cycles;
}
+ srcline = callchain_srcline(al.map, al.sym, al.addr);
return callchain_cursor_append(cursor, al.addr, al.map, al.sym,
branch, flags, nr_loop_iter,
- iter_cycles, branch_from);
+ iter_cycles, branch_from, srcline);
}
struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
@@ -2101,12 +2112,15 @@ check_calls:
static int unwind_entry(struct unwind_entry *entry, void *arg)
{
struct callchain_cursor *cursor = arg;
+ const char *srcline = NULL;
if (symbol_conf.hide_unresolved && entry->sym == NULL)
return 0;
+
+ srcline = callchain_srcline(entry->map, entry->sym, entry->ip);
return callchain_cursor_append(cursor, entry->ip,
entry->map, entry->sym,
- false, NULL, 0, 0, 0);
+ false, NULL, 0, 0, 0, srcline);
}
static int thread__resolve_callchain_unwind(struct thread *thread,