From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Date: Thu, 28 Sep 2023 13:22:12 +0530
Subject: tools/perf: Add "is_kmod" to struct dso to check if it is kernel
module
Git-commit: 6be5d82862ee9b4e517dcfdfb064c2d671dbd45a
Patch-mainline: v6.7-rc1
References: perf-v6.7 (jsc#PED-6012 jsc#PED-6121)
Update "struct dso" to include new member "is_kmod".
This new field will determine if the file is a kernel
module or not.
To resolve the address from a sample, perf looks at the
DSO maps. In case of address from a kernel module, there
were some address found to be not resolved. This was
observed while running perf test for "Object code reading".
Though the ip falls beteen the start address of the loaded
module (perf map->start ) and end address ( perf map->end),
it was unresolved.
This was happening because in some cases for kernel
modules, address from sample points to stub instructions.
To identify if the DSO is a kernel module, the new field
"is_kmod" is added to "struct dso".
Reported-by: Disha Goel <disgoel@linux.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: kjain@linux.ibm.com
Cc: maddy@linux.ibm.com
Cc: disgoel@linux.vnet.ibm.com
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230928075213.84392-2-atrajeev@linux.vnet.ibm.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Tony Jones <tonyj@suse.de>
---
tools/perf/util/dso.c | 2 ++
tools/perf/util/dso.h | 1 +
2 files changed, 3 insertions(+)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index bdfead36b83a..1f629b6fb7cf 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -477,6 +477,7 @@ void dso__set_module_info(struct dso *dso, struct kmod_path *m,
dso->comp = m->comp;
}
+ dso->is_kmod = 1;
dso__set_short_name(dso, strdup(m->name), true);
}
@@ -1338,6 +1339,7 @@ struct dso *dso__new_id(const char *name, struct dso_id *id)
dso->has_srcline = 1;
dso->a2l_fails = 1;
dso->kernel = DSO_SPACE__USER;
+ dso->is_kmod = 0;
dso->needs_swap = DSO_SWAP__UNSET;
dso->comp = COMP_ID__NONE;
RB_CLEAR_NODE(&dso->rb_node);
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 70fe0fe69bef..3759de8c2267 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -162,6 +162,7 @@ struct dso {
char *symsrc_filename;
unsigned int a2l_fails;
enum dso_space_type kernel;
+ bool is_kmod;
enum dso_swap_type needs_swap;
enum dso_binary_type symtab_type;
enum dso_binary_type binary_type;