Messages in this thread Patch in this message | | | From | Adrian Hunter <> | Subject | [PATCH RFC 5/6] perf auxtrace: Add auxtrace_cache__remove() | Date | Fri, 25 Oct 2019 15:59:59 +0300 |
| |
Add auxtrace_cache__remove(). Intel PT uses an auxtrace_cache to store the results of code-walking, so that the same block of instructions does not have to be decoded repeatedly. However, when there are text poke events, the associated cache entries need to be removed.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> --- tools/perf/util/auxtrace.c | 28 ++++++++++++++++++++++++++++ tools/perf/util/auxtrace.h | 1 + 2 files changed, 29 insertions(+)
diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c index 8470dfe9fe97..c555c3ccd79d 100644 --- a/tools/perf/util/auxtrace.c +++ b/tools/perf/util/auxtrace.c @@ -1457,6 +1457,34 @@ int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, return 0; } +static struct auxtrace_cache_entry *auxtrace_cache__rm(struct auxtrace_cache *c, + u32 key) +{ + struct auxtrace_cache_entry *entry; + struct hlist_head *hlist; + struct hlist_node *n; + + if (!c) + return NULL; + + hlist = &c->hashtable[hash_32(key, c->bits)]; + hlist_for_each_entry_safe(entry, n, hlist, hash) { + if (entry->key == key) { + hlist_del(&entry->hash); + return entry; + } + } + + return NULL; +} + +void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key) +{ + struct auxtrace_cache_entry *entry = auxtrace_cache__rm(c, key); + + auxtrace_cache__free_entry(c, entry); +} + void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key) { struct auxtrace_cache_entry *entry; diff --git a/tools/perf/util/auxtrace.h b/tools/perf/util/auxtrace.h index f201f36bc35f..3f4aa5427d76 100644 --- a/tools/perf/util/auxtrace.h +++ b/tools/perf/util/auxtrace.h @@ -489,6 +489,7 @@ void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c); void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry); int auxtrace_cache__add(struct auxtrace_cache *c, u32 key, struct auxtrace_cache_entry *entry); +void auxtrace_cache__remove(struct auxtrace_cache *c, u32 key); void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key); struct auxtrace_record *auxtrace_record__init(struct evlist *evlist, -- 2.17.1
| |