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perf symbols: Check compatible symtab type before loading dso

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When loading a dso it'll look for symbol tables of all possible types.
However it's just wasted of time to check incompatible types - like
trying kernel module when loading user library.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1392859976-32760-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2014-02-20 10:32:56 +09:00 committed by Arnaldo Carvalho de Melo
parent 0d3dc5e8b8
commit 1029f9fedf
1 changed files with 52 additions and 9 deletions
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61
tools/perf/util/symbol.c
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@ -1251,6 +1251,46 @@ out_failure:
return -1;
}
static bool dso__is_compatible_symtab_type(struct dso *dso, bool kmod,
enum dso_binary_type type)
{
switch (type) {
case DSO_BINARY_TYPE__JAVA_JIT:
case DSO_BINARY_TYPE__DEBUGLINK:
case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
return !kmod && dso->kernel == DSO_TYPE_USER;
case DSO_BINARY_TYPE__KALLSYMS:
case DSO_BINARY_TYPE__VMLINUX:
case DSO_BINARY_TYPE__KCORE:
return dso->kernel == DSO_TYPE_KERNEL;
case DSO_BINARY_TYPE__GUEST_KALLSYMS:
case DSO_BINARY_TYPE__GUEST_VMLINUX:
case DSO_BINARY_TYPE__GUEST_KCORE:
return dso->kernel == DSO_TYPE_GUEST_KERNEL;
case DSO_BINARY_TYPE__GUEST_KMODULE:
case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
/*
* kernel modules know their symtab type - it's set when
* creating a module dso in machine__new_module().
*/
return kmod && dso->symtab_type == type;
case DSO_BINARY_TYPE__BUILD_ID_CACHE:
return true;
case DSO_BINARY_TYPE__NOT_FOUND:
default:
return false;
}
}
int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
{
char *name;
@ -1261,6 +1301,7 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
int ss_pos = 0;
struct symsrc ss_[2];
struct symsrc *syms_ss = NULL, *runtime_ss = NULL;
bool kmod;
dso__set_loaded(dso, map->type);
@ -1301,7 +1342,11 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
if (!name)
return -1;
/* Iterate over candidate debug images.
kmod = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
/*
* Iterate over candidate debug images.
* Keep track of "interesting" ones (those which have a symtab, dynsym,
* and/or opd section) for processing.
*/
@ -1311,6 +1356,9 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
enum dso_binary_type symtab_type = binary_type_symtab[i];
if (!dso__is_compatible_symtab_type(dso, kmod, symtab_type))
continue;
if (dso__read_binary_type_filename(dso, symtab_type,
root_dir, name, PATH_MAX))
continue;
@ -1351,15 +1399,10 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
if (!runtime_ss && syms_ss)
runtime_ss = syms_ss;
if (syms_ss) {
int km;
km = dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE ||
dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE;
ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, km);
} else {
if (syms_ss)
ret = dso__load_sym(dso, map, syms_ss, runtime_ss, filter, kmod);
else
ret = -1;
}
if (ret > 0) {
int nr_plt;