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-rw-r--r--tools/perf/Documentation/perf-script.txt13
-rw-r--r--tools/perf/builtin-script.c264
-rw-r--r--tools/perf/util/Build1
-rw-r--r--tools/perf/util/dump-insn.c14
-rw-r--r--tools/perf/util/dump-insn.h22
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c24
6 files changed, 327 insertions, 11 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 62c9b0c77a3a..cb0eda3925e6 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -116,7 +116,7 @@ OPTIONS
--fields::
Comma separated list of fields to print. Options are:
comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
- srcline, period, iregs, brstack, brstacksym, flags, bpf-output,
+ srcline, period, iregs, brstack, brstacksym, flags, bpf-output, brstackinsn,
callindent, insn, insnlen. Field list can be prepended with the type, trace, sw or hw,
to indicate to which event type the field list applies.
e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
@@ -189,15 +189,20 @@ OPTIONS
i.e., -F "" is not allowed.
The brstack output includes branch related information with raw addresses using the
- /v/v/v/v/ syntax in the following order:
+ /v/v/v/v/cycles syntax in the following order:
FROM: branch source instruction
TO : branch target instruction
M/P/-: M=branch target mispredicted or branch direction was mispredicted, P=target predicted or direction predicted, -=not supported
X/- : X=branch inside a transactional region, -=not in transaction region or not supported
A/- : A=TSX abort entry, -=not aborted region or not supported
+ cycles
The brstacksym is identical to brstack, except that the FROM and TO addresses are printed in a symbolic form if possible.
+ When brstackinsn is specified the full assembler sequences of branch sequences for each sample
+ is printed. This is the full execution path leading to the sample. This is only supported when the
+ sample was recorded with perf record -b or -j any.
+
-k::
--vmlinux=<file>::
vmlinux pathname
@@ -302,6 +307,10 @@ include::itrace.txt[]
stop time is not given (i.e, time string is 'x.y,') then analysis goes
to end of file.
+--max-blocks::
+ Set the maximum number of program blocks to print with brstackasm for
+ each sample.
+
SEE ALSO
--------
linkperf:perf-record[1], linkperf:perf-script-perl[1],
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 66d62c98dff9..c98e16689b57 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -28,6 +28,7 @@
#include <linux/time64.h>
#include "asm/bug.h"
#include "util/mem-events.h"
+#include "util/dump-insn.h"
static char const *script_name;
static char const *generate_script_lang;
@@ -42,6 +43,7 @@ static bool nanosecs;
static const char *cpu_list;
static DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
static struct perf_stat_config stat_config;
+static int max_blocks;
unsigned int scripting_max_stack = PERF_MAX_STACK_DEPTH;
@@ -69,6 +71,7 @@ enum perf_output_field {
PERF_OUTPUT_CALLINDENT = 1U << 20,
PERF_OUTPUT_INSN = 1U << 21,
PERF_OUTPUT_INSNLEN = 1U << 22,
+ PERF_OUTPUT_BRSTACKINSN = 1U << 23,
};
struct output_option {
@@ -98,6 +101,7 @@ struct output_option {
{.str = "callindent", .field = PERF_OUTPUT_CALLINDENT},
{.str = "insn", .field = PERF_OUTPUT_INSN},
{.str = "insnlen", .field = PERF_OUTPUT_INSNLEN},
+ {.str = "brstackinsn", .field = PERF_OUTPUT_BRSTACKINSN},
};
/* default set to maintain compatibility with current format */
@@ -292,7 +296,13 @@ static int perf_evsel__check_attr(struct perf_evsel *evsel,
"selected. Hence, no address to lookup the source line number.\n");
return -EINVAL;
}
-
+ if (PRINT_FIELD(BRSTACKINSN) &&
+ !(perf_evlist__combined_branch_type(session->evlist) &
+ PERF_SAMPLE_BRANCH_ANY)) {
+ pr_err("Display of branch stack assembler requested, but non all-branch filter set\n"
+ "Hint: run 'perf record -b ...'\n");
+ return -EINVAL;
+ }
if ((PRINT_FIELD(PID) || PRINT_FIELD(TID)) &&
perf_evsel__check_stype(evsel, PERF_SAMPLE_TID, "TID",
PERF_OUTPUT_TID|PERF_OUTPUT_PID))
@@ -546,6 +556,233 @@ static void print_sample_brstacksym(struct perf_sample *sample,
}
}
+#define MAXBB 16384UL
+
+static int grab_bb(u8 *buffer, u64 start, u64 end,
+ struct machine *machine, struct thread *thread,
+ bool *is64bit, u8 *cpumode, bool last)
+{
+ long offset, len;
+ struct addr_location al;
+ bool kernel;
+
+ if (!start || !end)
+ return 0;
+
+ kernel = machine__kernel_ip(machine, start);
+ if (kernel)
+ *cpumode = PERF_RECORD_MISC_KERNEL;
+ else
+ *cpumode = PERF_RECORD_MISC_USER;
+
+ /*
+ * Block overlaps between kernel and user.
+ * This can happen due to ring filtering
+ * On Intel CPUs the entry into the kernel is filtered,
+ * but the exit is not. Let the caller patch it up.
+ */
+ if (kernel != machine__kernel_ip(machine, end)) {
+ printf("\tblock %" PRIx64 "-%" PRIx64 " transfers between kernel and user\n",
+ start, end);
+ return -ENXIO;
+ }
+
+ memset(&al, 0, sizeof(al));
+ if (end - start > MAXBB - MAXINSN) {
+ if (last)
+ printf("\tbrstack does not reach to final jump (%" PRIx64 "-%" PRIx64 ")\n", start, end);
+ else
+ printf("\tblock %" PRIx64 "-%" PRIx64 " (%" PRIu64 ") too long to dump\n", start, end, end - start);
+ return 0;
+ }
+
+ thread__find_addr_map(thread, *cpumode, MAP__FUNCTION, start, &al);
+ if (!al.map || !al.map->dso) {
+ printf("\tcannot resolve %" PRIx64 "-%" PRIx64 "\n", start, end);
+ return 0;
+ }
+ if (al.map->dso->data.status == DSO_DATA_STATUS_ERROR) {
+ printf("\tcannot resolve %" PRIx64 "-%" PRIx64 "\n", start, end);
+ return 0;
+ }
+
+ /* Load maps to ensure dso->is_64_bit has been updated */
+ map__load(al.map);
+
+ offset = al.map->map_ip(al.map, start);
+ len = dso__data_read_offset(al.map->dso, machine, offset, (u8 *)buffer,
+ end - start + MAXINSN);
+
+ *is64bit = al.map->dso->is_64_bit;
+ if (len <= 0)
+ printf("\tcannot fetch code for block at %" PRIx64 "-%" PRIx64 "\n",
+ start, end);
+ return len;
+}
+
+static void print_jump(uint64_t ip, struct branch_entry *en,
+ struct perf_insn *x, u8 *inbuf, int len,
+ int insn)
+{
+ printf("\t%016" PRIx64 "\t%-30s\t#%s%s%s%s",
+ ip,
+ dump_insn(x, ip, inbuf, len, NULL),
+ en->flags.predicted ? " PRED" : "",
+ en->flags.mispred ? " MISPRED" : "",
+ en->flags.in_tx ? " INTX" : "",
+ en->flags.abort ? " ABORT" : "");
+ if (en->flags.cycles) {
+ printf(" %d cycles", en->flags.cycles);
+ if (insn)
+ printf(" %.2f IPC", (float)insn / en->flags.cycles);
+ }
+ putchar('\n');
+}
+
+static void print_ip_sym(struct thread *thread, u8 cpumode, int cpu,
+ uint64_t addr, struct symbol **lastsym,
+ struct perf_event_attr *attr)
+{
+ struct addr_location al;
+ int off;
+
+ memset(&al, 0, sizeof(al));
+
+ thread__find_addr_map(thread, cpumode, MAP__FUNCTION, addr, &al);
+ if (!al.map)
+ thread__find_addr_map(thread, cpumode, MAP__VARIABLE,
+ addr, &al);
+ if ((*lastsym) && al.addr >= (*lastsym)->start && al.addr < (*lastsym)->end)
+ return;
+
+ al.cpu = cpu;
+ al.sym = NULL;
+ if (al.map)
+ al.sym = map__find_symbol(al.map, al.addr);
+
+ if (!al.sym)
+ return;
+
+ if (al.addr < al.sym->end)
+ off = al.addr - al.sym->start;
+ else
+ off = al.addr - al.map->start - al.sym->start;
+ printf("\t%s", al.sym->name);
+ if (off)
+ printf("%+d", off);
+ putchar(':');
+ if (PRINT_FIELD(SRCLINE))
+ map__fprintf_srcline(al.map, al.addr, "\t", stdout);
+ putchar('\n');
+ *lastsym = al.sym;
+}
+
+static void print_sample_brstackinsn(struct perf_sample *sample,
+ struct thread *thread,
+ struct perf_event_attr *attr,
+ struct machine *machine)
+{
+ struct branch_stack *br = sample->branch_stack;
+ u64 start, end;
+ int i, insn, len, nr, ilen;
+ struct perf_insn x;
+ u8 buffer[MAXBB];
+ unsigned off;
+ struct symbol *lastsym = NULL;
+
+ if (!(br && br->nr))
+ return;
+ nr = br->nr;
+ if (max_blocks && nr > max_blocks + 1)
+ nr = max_blocks + 1;
+
+ x.thread = thread;
+ x.cpu = sample->cpu;
+
+ putchar('\n');
+
+ /* Handle first from jump, of which we don't know the entry. */
+ len = grab_bb(buffer, br->entries[nr-1].from,
+ br->entries[nr-1].from,
+ machine, thread, &x.is64bit, &x.cpumode, false);
+ if (len > 0) {
+ print_ip_sym(thread, x.cpumode, x.cpu,
+ br->entries[nr - 1].from, &lastsym, attr);
+ print_jump(br->entries[nr - 1].from, &br->entries[nr - 1],
+ &x, buffer, len, 0);
+ }
+
+ /* Print all blocks */
+ for (i = nr - 2; i >= 0; i--) {
+ if (br->entries[i].from || br->entries[i].to)
+ pr_debug("%d: %" PRIx64 "-%" PRIx64 "\n", i,
+ br->entries[i].from,
+ br->entries[i].to);
+ start = br->entries[i + 1].to;
+ end = br->entries[i].from;
+
+ len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, false);
+ /* Patch up missing kernel transfers due to ring filters */
+ if (len == -ENXIO && i > 0) {
+ end = br->entries[--i].from;
+ pr_debug("\tpatching up to %" PRIx64 "-%" PRIx64 "\n", start, end);
+ len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, false);
+ }
+ if (len <= 0)
+ continue;
+
+ insn = 0;
+ for (off = 0;; off += ilen) {
+ uint64_t ip = start + off;
+
+ print_ip_sym(thread, x.cpumode, x.cpu, ip, &lastsym, attr);
+ if (ip == end) {
+ print_jump(ip, &br->entries[i], &x, buffer + off, len - off, insn);
+ break;
+ } else {
+ printf("\t%016" PRIx64 "\t%s\n", ip,
+ dump_insn(&x, ip, buffer + off, len - off, &ilen));
+ if (ilen == 0)
+ break;
+ insn++;
+ }
+ }
+ }
+
+ /*
+ * Hit the branch? In this case we are already done, and the target
+ * has not been executed yet.
+ */
+ if (br->entries[0].from == sample->ip)
+ return;
+ if (br->entries[0].flags.abort)
+ return;
+
+ /*
+ * Print final block upto sample
+ */
+ start = br->entries[0].to;
+ end = sample->ip;
+ len = grab_bb(buffer, start, end, machine, thread, &x.is64bit, &x.cpumode, true);
+ print_ip_sym(thread, x.cpumode, x.cpu, start, &lastsym, attr);
+ if (len <= 0) {
+ /* Print at least last IP if basic block did not work */
+ len = grab_bb(buffer, sample->ip, sample->ip,
+ machine, thread, &x.is64bit, &x.cpumode, false);
+ if (len <= 0)
+ return;
+
+ printf("\t%016" PRIx64 "\t%s\n", sample->ip,
+ dump_insn(&x, sample->ip, buffer, len, NULL));
+ return;
+ }
+ for (off = 0; off <= end - start; off += ilen) {
+ printf("\t%016" PRIx64 "\t%s\n", start + off,
+ dump_insn(&x, start + off, buffer + off, len - off, &ilen));
+ if (ilen == 0)
+ break;
+ }
+}
static void print_sample_addr(struct perf_sample *sample,
struct thread *thread,
@@ -632,7 +869,9 @@ static void print_sample_callindent(struct perf_sample *sample,
}
static void print_insn(struct perf_sample *sample,
- struct perf_event_attr *attr)
+ struct perf_event_attr *attr,
+ struct thread *thread,
+ struct machine *machine)
{
if (PRINT_FIELD(INSNLEN))
printf(" ilen: %d", sample->insn_len);
@@ -643,12 +882,15 @@ static void print_insn(struct perf_sample *sample,
for (i = 0; i < sample->insn_len; i++)
printf(" %02x", (unsigned char)sample->insn[i]);
}
+ if (PRINT_FIELD(BRSTACKINSN))
+ print_sample_brstackinsn(sample, thread, attr, machine);
}
static void print_sample_bts(struct perf_sample *sample,
struct perf_evsel *evsel,
struct thread *thread,
- struct addr_location *al)
+ struct addr_location *al,
+ struct machine *machine)
{
struct perf_event_attr *attr = &evsel->attr;
bool print_srcline_last = false;
@@ -689,7 +931,7 @@ static void print_sample_bts(struct perf_sample *sample,
if (print_srcline_last)
map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
- print_insn(sample, attr);
+ print_insn(sample, attr, thread, machine);
printf("\n");
}
@@ -872,7 +1114,8 @@ static size_t data_src__printf(u64 data_src)
static void process_event(struct perf_script *script,
struct perf_sample *sample, struct perf_evsel *evsel,
- struct addr_location *al)
+ struct addr_location *al,
+ struct machine *machine)
{
struct thread *thread = al->thread;
struct perf_event_attr *attr = &evsel->attr;
@@ -899,7 +1142,7 @@ static void process_event(struct perf_script *script,
print_sample_flags(sample->flags);
if (is_bts_event(attr)) {
- print_sample_bts(sample, evsel, thread, al);
+ print_sample_bts(sample, evsel, thread, al, machine);
return;
}
@@ -937,7 +1180,7 @@ static void process_event(struct perf_script *script,
if (perf_evsel__is_bpf_output(evsel) && PRINT_FIELD(BPF_OUTPUT))
print_sample_bpf_output(sample);
- print_insn(sample, attr);
+ print_insn(sample, attr, thread, machine);
printf("\n");
}
@@ -1047,7 +1290,7 @@ static int process_sample_event(struct perf_tool *tool,
if (scripting_ops)
scripting_ops->process_event(event, sample, evsel, &al);
else
- process_event(scr, sample, evsel, &al);
+ process_event(scr, sample, evsel, &al, machine);
out_put:
addr_location__put(&al);
@@ -2191,7 +2434,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
"Valid types: hw,sw,trace,raw. "
"Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
"addr,symoff,period,iregs,brstack,brstacksym,flags,"
- "bpf-output,callindent,insn,insnlen", parse_output_fields),
+ "bpf-output,callindent,insn,insnlen,brstackinsn",
+ parse_output_fields),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
@@ -2222,6 +2466,8 @@ int cmd_script(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_BOOLEAN('\0', "show-namespace-events", &script.show_namespace_events,
"Show namespace events (if recorded)"),
OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"),
+ OPT_INTEGER(0, "max-blocks", &max_blocks,
+ "Maximum number of code blocks to dump with brstackinsn"),
OPT_BOOLEAN(0, "ns", &nanosecs,
"Use 9 decimal places when displaying time"),
OPT_CALLBACK_OPTARG(0, "itrace", &itrace_synth_opts, NULL, "opts",
diff --git a/tools/perf/util/Build b/tools/perf/util/Build
index 2ea5ee179a3b..fb4f42f1bb38 100644
--- a/tools/perf/util/Build
+++ b/tools/perf/util/Build
@@ -82,6 +82,7 @@ libperf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
libperf-$(CONFIG_AUXTRACE) += intel-pt.o
libperf-$(CONFIG_AUXTRACE) += intel-bts.o
libperf-y += parse-branch-options.o
+libperf-y += dump-insn.o
libperf-y += parse-regs-options.o
libperf-y += term.o
libperf-y += help-unknown-cmd.o
diff --git a/tools/perf/util/dump-insn.c b/tools/perf/util/dump-insn.c
new file mode 100644
index 000000000000..ffbdb19f05d0
--- /dev/null
+++ b/tools/perf/util/dump-insn.c
@@ -0,0 +1,14 @@
+#include <linux/compiler.h>
+#include "dump-insn.h"
+
+/* Fallback code */
+
+__weak
+const char *dump_insn(struct perf_insn *x __maybe_unused,
+ u64 ip __maybe_unused, u8 *inbuf __maybe_unused,
+ int inlen __maybe_unused, int *lenp)
+{
+ if (lenp)
+ *lenp = 0;
+ return "?";
+}
diff --git a/tools/perf/util/dump-insn.h b/tools/perf/util/dump-insn.h
new file mode 100644
index 000000000000..90fb115981cf
--- /dev/null
+++ b/tools/perf/util/dump-insn.h
@@ -0,0 +1,22 @@
+#ifndef __PERF_DUMP_INSN_H
+#define __PERF_DUMP_INSN_H 1
+
+#define MAXINSN 15
+
+#include <linux/types.h>
+
+struct thread;
+
+struct perf_insn {
+ /* Initialized by callers: */
+ struct thread *thread;
+ u8 cpumode;
+ bool is64bit;
+ int cpu;
+ /* Temporary */
+ char out[256];
+};
+
+const char *dump_insn(struct perf_insn *x, u64 ip,
+ u8 *inbuf, int inlen, int *lenp);
+#endif
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
index 55b6250350d7..a5f35b21172f 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-insn-decoder.c
@@ -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",
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 04:47:40 +0000