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Merge tag 'perf-core-for-mingo-4.12-20170316' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

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Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

New features:

 - Add 'brstackinsn' field in 'perf script' to reuse the x86 instruction
   decoder used in the Intel PT code to study hot paths to samples (Andi Kleen)

Kernel changes:

 - Default UPROBES_EVENTS to Y (Alexei Starovoitov)

 - Fix check for kretprobe offset within function entry (Naveen N. Rao)

Infrastructure changes:

 - Introduce util func is_sdt_event() (Ravi Bangoria)

 - Make perf_event__synthesize_mmap_events() scale on older kernels where
   reading /proc/pid/maps is way slower than reading /proc/pid/task/pid/maps (Stephane Eranian)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2017-03-16 17:29:23 +01:00
parent ee368428aa 61f35d7506
commit 61f63e3837
14 changed files with 381 additions and 40 deletions
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24
tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
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@@ -26,6 +26,7 @@
#include "insn.c"
#include "intel-pt-insn-decoder.h"
#include "dump-insn.h"
#if INTEL_PT_INSN_BUF_SZ < MAX_INSN_SIZE || INTEL_PT_INSN_BUF_SZ > MAX_INSN
#error Instruction buffer size too small
@@ -179,6 +180,29 @@ int intel_pt_get_insn(const unsigned char *buf, size_t len, int x86_64,
return 0;
}
const char *dump_insn(struct perf_insn *x, uint64_t ip __maybe_unused,
u8 *inbuf, int inlen, int *lenp)
{
struct insn insn;
int n, i;
int left;
insn_init(&insn, inbuf, inlen, x->is64bit);
insn_get_length(&insn);
if (!insn_complete(&insn) || insn.length > inlen)
return "<bad>";
if (lenp)
*lenp = insn.length;
left = sizeof(x->out);
n = snprintf(x->out, left, "insn: ");
left -= n;
for (i = 0; i < insn.length; i++) {
n += snprintf(x->out + n, left, "%02x ", inbuf[i]);
left -= n;
}
return x->out;
}
const char *branch_name[] = {
[INTEL_PT_OP_OTHER] = "Other",
[INTEL_PT_OP_CALL] = "Call",