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Diffstat (limited to 'tools/perf/util/jitdump.c')
-rw-r--r--tools/perf/util/jitdump.c256
1 files changed, 190 insertions, 66 deletions
diff --git a/tools/perf/util/jitdump.c b/tools/perf/util/jitdump.c
index 9084930e1757..f00814e37de9 100644
--- a/tools/perf/util/jitdump.c
+++ b/tools/perf/util/jitdump.c
@@ -1,6 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
#include <sys/sysmacros.h>
#include <sys/types.h>
#include <errno.h>
+#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -12,10 +14,11 @@
#include <sys/mman.h>
#include <linux/stringify.h>
-#include "util.h"
#include "event.h"
#include "debug.h"
+#include "dso.h"
#include "evlist.h"
+#include "namespaces.h"
#include "symbol.h"
#include <elf.h>
@@ -24,20 +27,22 @@
#include "jit.h"
#include "jitdump.h"
#include "genelf.h"
-#include "../builtin.h"
+#include "thread.h"
-#include "sane_ctype.h"
+#include <linux/ctype.h>
+#include <linux/zalloc.h>
struct jit_buf_desc {
- struct perf_data_file *output;
+ struct perf_data *output;
struct perf_session *session;
struct machine *machine;
+ struct nsinfo *nsi;
union jr_entry *entry;
void *buf;
uint64_t sample_type;
size_t bufsize;
FILE *in;
- bool needs_bswap; /* handles cross-endianess */
+ bool needs_bswap; /* handles cross-endianness */
bool use_arch_timestamp;
void *debug_data;
void *unwinding_data;
@@ -51,17 +56,10 @@ struct jit_buf_desc {
char dir[PATH_MAX];
};
-struct debug_line_info {
- unsigned long vma;
- unsigned int lineno;
- /* The filename format is unspecified, absolute path, relative etc. */
- char const filename[0];
-};
-
struct jit_tool {
struct perf_tool tool;
- struct perf_data_file output;
- struct perf_data_file input;
+ struct perf_data output;
+ struct perf_data input;
u64 bytes_written;
};
@@ -69,7 +67,8 @@ struct jit_tool {
#define get_jit_tool(t) (container_of(tool, struct jit_tool, tool))
static int
-jit_emit_elf(char *filename,
+jit_emit_elf(struct jit_buf_desc *jd,
+ char *filename,
const char *sym,
uint64_t code_addr,
const void *code,
@@ -80,14 +79,18 @@ jit_emit_elf(char *filename,
uint32_t unwinding_header_size,
uint32_t unwinding_size)
{
- int ret, fd;
+ int ret, fd, saved_errno;
+ struct nscookie nsc;
if (verbose > 0)
fprintf(stderr, "write ELF image %s\n", filename);
+ nsinfo__mountns_enter(jd->nsi, &nsc);
fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644);
+ saved_errno = errno;
+ nsinfo__mountns_exit(&nsc);
if (fd == -1) {
- pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno));
+ pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(saved_errno));
return -1;
}
@@ -96,8 +99,11 @@ jit_emit_elf(char *filename,
close(fd);
- if (ret)
- unlink(filename);
+ if (ret) {
+ nsinfo__mountns_enter(jd->nsi, &nsc);
+ unlink(filename);
+ nsinfo__mountns_exit(&nsc);
+ }
return ret;
}
@@ -115,13 +121,13 @@ jit_close(struct jit_buf_desc *jd)
static int
jit_validate_events(struct perf_session *session)
{
- struct perf_evsel *evsel;
+ struct evsel *evsel;
/*
* check that all events use CLOCK_MONOTONIC
*/
evlist__for_each_entry(session->evlist, evsel) {
- if (evsel->attr.use_clockid == 0 || evsel->attr.clockid != CLOCK_MONOTONIC)
+ if (evsel->core.attr.use_clockid == 0 || evsel->core.attr.clockid != CLOCK_MONOTONIC)
return -1;
}
return 0;
@@ -131,12 +137,15 @@ static int
jit_open(struct jit_buf_desc *jd, const char *name)
{
struct jitheader header;
+ struct nscookie nsc;
struct jr_prefix *prefix;
ssize_t bs, bsz = 0;
void *n, *buf = NULL;
int ret, retval = -1;
+ nsinfo__mountns_enter(jd->nsi, &nsc);
jd->in = fopen(name, "r");
+ nsinfo__mountns_exit(&nsc);
if (!jd->in)
return -1;
@@ -224,11 +233,14 @@ jit_open(struct jit_buf_desc *jd, const char *name)
/*
* keep dirname for generating files and mmap records
*/
- strcpy(jd->dir, name);
+ strncpy(jd->dir, name, PATH_MAX);
+ jd->dir[PATH_MAX - 1] = '\0';
dirname(jd->dir);
+ free(buf);
return 0;
error:
+ free(buf);
funlockfile(jd->in);
fclose(jd->in);
return retval;
@@ -356,7 +368,7 @@ jit_inject_event(struct jit_buf_desc *jd, union perf_event *event)
{
ssize_t size;
- size = perf_data_file__write(jd->output, event, event->header.size);
+ size = perf_data__write(jd->output, event, event->header.size);
if (size < 0)
return -1;
@@ -364,19 +376,47 @@ jit_inject_event(struct jit_buf_desc *jd, union perf_event *event)
return 0;
}
+static pid_t jr_entry_pid(struct jit_buf_desc *jd, union jr_entry *jr)
+{
+ if (jd->nsi && nsinfo__in_pidns(jd->nsi))
+ return nsinfo__tgid(jd->nsi);
+ return jr->load.pid;
+}
+
+static pid_t jr_entry_tid(struct jit_buf_desc *jd, union jr_entry *jr)
+{
+ if (jd->nsi && nsinfo__in_pidns(jd->nsi))
+ return nsinfo__pid(jd->nsi);
+ return jr->load.tid;
+}
+
static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp)
{
- struct perf_tsc_conversion tc;
+ struct perf_tsc_conversion tc = { .time_shift = 0, };
+ struct perf_record_time_conv *time_conv = &jd->session->time_conv;
if (!jd->use_arch_timestamp)
return timestamp;
- tc.time_shift = jd->session->time_conv.time_shift;
- tc.time_mult = jd->session->time_conv.time_mult;
- tc.time_zero = jd->session->time_conv.time_zero;
+ tc.time_shift = time_conv->time_shift;
+ tc.time_mult = time_conv->time_mult;
+ tc.time_zero = time_conv->time_zero;
- if (!tc.time_mult)
- return 0;
+ /*
+ * The event TIME_CONV was extended for the fields from "time_cycles"
+ * when supported cap_user_time_short, for backward compatibility,
+ * checks the event size and assigns these extended fields if these
+ * fields are contained in the event.
+ */
+ if (event_contains(*time_conv, time_cycles)) {
+ tc.time_cycles = time_conv->time_cycles;
+ tc.time_mask = time_conv->time_mask;
+ tc.cap_user_time_zero = time_conv->cap_user_time_zero;
+ tc.cap_user_time_short = time_conv->cap_user_time_short;
+
+ if (!tc.cap_user_time_zero)
+ return 0;
+ }
return tsc_to_perf_time(timestamp, &tc);
}
@@ -385,7 +425,7 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
{
struct perf_sample sample;
union perf_event *event;
- struct perf_tool *tool = jd->session->tool;
+ const struct perf_tool *tool = jd->session->tool;
uint64_t code, addr;
uintptr_t uaddr;
char *filename;
@@ -393,16 +433,17 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
size_t size;
u16 idr_size;
const char *sym;
- uint32_t count;
+ uint64_t count;
int ret, csize, usize;
- pid_t pid, tid;
+ pid_t nspid, pid, tid;
struct {
u32 pid, tid;
u64 time;
} *id;
- pid = jr->load.pid;
- tid = jr->load.tid;
+ nspid = jr->load.pid;
+ pid = jr_entry_pid(jd, jr);
+ tid = jr_entry_tid(jd, jr);
csize = jr->load.code_size;
usize = jd->unwinding_mapped_size;
addr = jr->load.code_addr;
@@ -416,27 +457,25 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
return -1;
filename = event->mmap2.filename;
- size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so",
+ size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%" PRIu64 ".so",
jd->dir,
- pid,
+ nspid,
count);
size++; /* for \0 */
size = PERF_ALIGN(size, sizeof(u64));
uaddr = (uintptr_t)code;
- ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries,
+ ret = jit_emit_elf(jd, filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries,
jd->unwinding_data, jd->eh_frame_hdr_size, jd->unwinding_size);
if (jd->debug_data && jd->nr_debug_entries) {
- free(jd->debug_data);
- jd->debug_data = NULL;
+ zfree(&jd->debug_data);
jd->nr_debug_entries = 0;
}
if (jd->unwinding_data && jd->eh_frame_hdr_size) {
- free(jd->unwinding_data);
- jd->unwinding_data = NULL;
+ zfree(&jd->unwinding_data);
jd->eh_frame_hdr_size = 0;
jd->unwinding_mapped_size = 0;
jd->unwinding_size = 0;
@@ -446,7 +485,7 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
free(event);
return -1;
}
- if (stat(filename, &st))
+ if (nsinfo__stat(filename, &st, jd->nsi))
memset(&st, 0, sizeof(st));
event->mmap2.header.type = PERF_RECORD_MMAP2;
@@ -478,7 +517,7 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
* create pseudo sample to induce dso hit increment
* use first address as sample address
*/
- memset(&sample, 0, sizeof(sample));
+ perf_sample__init(&sample, /*all=*/true);
sample.cpumode = PERF_RECORD_MISC_USER;
sample.pid = pid;
sample.tid = tid;
@@ -487,15 +526,33 @@ static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr)
ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
if (ret)
- return ret;
+ goto out;
ret = jit_inject_event(jd, event);
/*
* mark dso as use to generate buildid in the header
*/
- if (!ret)
- build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
-
+ if (!ret) {
+ struct dso_id dso_id = {
+ {
+ .maj = event->mmap2.maj,
+ .min = event->mmap2.min,
+ .ino = event->mmap2.ino,
+ .ino_generation = event->mmap2.ino_generation,
+ },
+ .mmap2_valid = true,
+ .mmap2_ino_generation_valid = true,
+ };
+ struct dso *dso = machine__findnew_dso_id(jd->machine, filename, &dso_id);
+
+ if (dso)
+ dso__set_hit(dso);
+
+ dso__put(dso);
+ }
+out:
+ perf_sample__exit(&sample);
+ free(event);
return ret;
}
@@ -503,21 +560,22 @@ static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr)
{
struct perf_sample sample;
union perf_event *event;
- struct perf_tool *tool = jd->session->tool;
+ const struct perf_tool *tool = jd->session->tool;
char *filename;
size_t size;
struct stat st;
int usize;
u16 idr_size;
int ret;
- pid_t pid, tid;
+ pid_t nspid, pid, tid;
struct {
u32 pid, tid;
u64 time;
} *id;
- pid = jr->move.pid;
- tid = jr->move.tid;
+ nspid = jr->load.pid;
+ pid = jr_entry_pid(jd, jr);
+ tid = jr_entry_tid(jd, jr);
usize = jd->unwinding_mapped_size;
idr_size = jd->machine->id_hdr_size;
@@ -529,14 +587,14 @@ static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr)
return -1;
filename = event->mmap2.filename;
- size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64,
+ size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%" PRIu64 ".so",
jd->dir,
- pid,
+ nspid,
jr->move.code_index);
size++; /* for \0 */
- if (stat(filename, &st))
+ if (nsinfo__stat(filename, &st, jd->nsi))
memset(&st, 0, sizeof(st));
size = PERF_ALIGN(size, sizeof(u64));
@@ -570,7 +628,7 @@ static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr)
* create pseudo sample to induce dso hit increment
* use first address as sample address
*/
- memset(&sample, 0, sizeof(sample));
+ perf_sample__init(&sample, /*all=*/true);
sample.cpumode = PERF_RECORD_MISC_USER;
sample.pid = pid;
sample.tid = tid;
@@ -579,12 +637,13 @@ static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr)
ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
if (ret)
- return ret;
+ goto out;
ret = jit_inject_event(jd, event);
if (!ret)
build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
-
+out:
+ perf_sample__exit(&sample);
return ret;
}
@@ -634,6 +693,7 @@ jit_repipe_unwinding_info(struct jit_buf_desc *jd, union jr_entry *jr)
jd->eh_frame_hdr_size = jr->unwinding.eh_frame_hdr_size;
jd->unwinding_size = jr->unwinding.unwinding_size;
jd->unwinding_mapped_size = jr->unwinding.mapped_size;
+ free(jd->unwinding_data);
jd->unwinding_data = unwinding_data;
return 0;
@@ -668,7 +728,7 @@ jit_process_dump(struct jit_buf_desc *jd)
}
static int
-jit_inject(struct jit_buf_desc *jd, char *path)
+jit_inject(struct jit_buf_desc *jd, const char *path)
{
int ret;
@@ -695,7 +755,7 @@ jit_inject(struct jit_buf_desc *jd, char *path)
* as captured in the RECORD_MMAP record
*/
static int
-jit_detect(char *mmap_name, pid_t pid)
+jit_detect(const char *mmap_name, pid_t pid, struct nsinfo *nsi, bool *in_pidns)
{
char *p;
char *end = NULL;
@@ -731,11 +791,16 @@ jit_detect(char *mmap_name, pid_t pid)
if (!end)
return -1;
+ *in_pidns = pid == nsinfo__nstgid(nsi);
/*
* pid does not match mmap pid
* pid==0 in system-wide mode (synthesized)
+ *
+ * If the pid in the file name is equal to the nstgid, then
+ * the agent ran inside a container and perf outside the
+ * container, so record it for further use in jit_inject().
*/
- if (pid && pid2 != pid)
+ if (pid && !(pid2 == pid || *in_pidns))
return -1;
/*
* validate suffix
@@ -749,44 +814,103 @@ jit_detect(char *mmap_name, pid_t pid)
return 0;
}
+static void jit_add_pid(struct machine *machine, pid_t pid)
+{
+ struct thread *thread = machine__findnew_thread(machine, pid, pid);
+
+ if (!thread) {
+ pr_err("%s: thread %d not found or created\n", __func__, pid);
+ return;
+ }
+
+ thread__set_priv(thread, (void *)true);
+ thread__put(thread);
+}
+
+static bool jit_has_pid(struct machine *machine, pid_t pid)
+{
+ struct thread *thread = machine__find_thread(machine, pid, pid);
+ void *priv;
+
+ if (!thread)
+ return false;
+
+ priv = thread__priv(thread);
+ thread__put(thread);
+ return (bool)priv;
+}
+
int
jit_process(struct perf_session *session,
- struct perf_data_file *output,
+ struct perf_data *output,
struct machine *machine,
- char *filename,
+ const char *filename,
pid_t pid,
+ pid_t tid,
u64 *nbytes)
{
- struct perf_evsel *first;
+ struct thread *thread;
+ struct nsinfo *nsi;
+ struct evsel *first;
struct jit_buf_desc jd;
+ bool in_pidns = false;
int ret;
+ thread = machine__findnew_thread(machine, pid, tid);
+ if (thread == NULL) {
+ pr_err("problem processing JIT mmap event, skipping it.\n");
+ return 0;
+ }
+
+ nsi = nsinfo__get(thread__nsinfo(thread));
+ thread__put(thread);
+
/*
* first, detect marker mmap (i.e., the jitdump mmap)
*/
- if (jit_detect(filename, pid))
+ if (jit_detect(filename, pid, nsi, &in_pidns)) {
+ nsinfo__put(nsi);
+
+ /*
+ * Strip //anon*, [anon:* and /memfd:* mmaps if we processed a jitdump for this pid
+ */
+ if (jit_has_pid(machine, pid) &&
+ ((strncmp(filename, "//anon", 6) == 0) ||
+ (strncmp(filename, "[anon:", 6) == 0) ||
+ (strncmp(filename, "/memfd:", 7) == 0)))
+ return 1;
+
return 0;
+ }
memset(&jd, 0, sizeof(jd));
jd.session = session;
jd.output = output;
jd.machine = machine;
+ jd.nsi = nsi;
+
+ if (in_pidns)
+ nsinfo__set_in_pidns(nsi);
/*
* track sample_type to compute id_all layout
* perf sets the same sample type to all events as of now
*/
- first = perf_evlist__first(session->evlist);
- jd.sample_type = first->attr.sample_type;
+ first = evlist__first(session->evlist);
+ jd.sample_type = first->core.attr.sample_type;
*nbytes = 0;
ret = jit_inject(&jd, filename);
if (!ret) {
+ jit_add_pid(machine, pid);
*nbytes = jd.bytes_written;
ret = 1;
}
+ nsinfo__put(jd.nsi);
+ free(jd.buf);
+
return ret;
}
generated by cgit (git 2.34.1) at 2025-12-24 23:19:12 +0000