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perf symbols: Introduce thread__find_cpumode_addr_location

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Its one level up thread__find_addr_location, where it will look in
different domains for a sample: user, kernel, hypervisor, etc.

Will soon be used by a patchkit by Andi Kleen.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-so6nxkh7xj48bc5kq4jpj991@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2014-03-11 16:16:49 -03:00
parent 0ea590ae81
commit 52a3cb8cfc
3 changed files with 34 additions and 25 deletions
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33
tools/perf/util/machine.c
View File

@ -1184,39 +1184,22 @@ static bool symbol__match_regex(struct symbol *sym, regex_t *regex)
return 0;
}
static const u8 cpumodes[] = {
PERF_RECORD_MISC_USER,
PERF_RECORD_MISC_KERNEL,
PERF_RECORD_MISC_GUEST_USER,
PERF_RECORD_MISC_GUEST_KERNEL
};
#define NCPUMODES (sizeof(cpumodes)/sizeof(u8))
static void ip__resolve_ams(struct machine *machine, struct thread *thread,
struct addr_map_symbol *ams,
u64 ip)
{
struct addr_location al;
size_t i;
u8 m;
memset(&al, 0, sizeof(al));
/*
* We cannot use the header.misc hint to determine whether a
* branch stack address is user, kernel, guest, hypervisor.
* Branches may straddle the kernel/user/hypervisor boundaries.
* Thus, we have to try consecutively until we find a match
* or else, the symbol is unknown
*/
thread__find_cpumode_addr_location(thread, machine, MAP__FUNCTION, ip, &al);
for (i = 0; i < NCPUMODES; i++) {
m = cpumodes[i];
/*
* We cannot use the header.misc hint to determine whether a
* branch stack address is user, kernel, guest, hypervisor.
* Branches may straddle the kernel/user/hypervisor boundaries.
* Thus, we have to try consecutively until we find a match
* or else, the symbol is unknown
*/
thread__find_addr_location(thread, machine, m, MAP__FUNCTION,
ip, &al);
if (al.map)
goto found;
}
found:
ams->addr = ip;
ams->al_addr = al.addr;
ams->sym = al.sym;

21
tools/perf/util/thread.c
View File

@ -142,3 +142,24 @@ int thread__fork(struct thread *thread, struct thread *parent, u64 timestamp)
return 0;
}
void thread__find_cpumode_addr_location(struct thread *thread,
struct machine *machine,
enum map_type type, u64 addr,
struct addr_location *al)
{
size_t i;
const u8 const cpumodes[] = {
PERF_RECORD_MISC_USER,
PERF_RECORD_MISC_KERNEL,
PERF_RECORD_MISC_GUEST_USER,
PERF_RECORD_MISC_GUEST_KERNEL
};
for (i = 0; i < ARRAY_SIZE(cpumodes); i++) {
thread__find_addr_location(thread, machine, cpumodes[i], type,
addr, al);
if (al->map)
break;
}
}

5
tools/perf/util/thread.h
View File

@ -58,6 +58,11 @@ void thread__find_addr_location(struct thread *thread, struct machine *machine,
u8 cpumode, enum map_type type, u64 addr,
struct addr_location *al);
void thread__find_cpumode_addr_location(struct thread *thread,
struct machine *machine,
enum map_type type, u64 addr,
struct addr_location *al);
static inline void *thread__priv(struct thread *thread)
{
return thread->priv;