[linux-2.6-block.git] / tools / perf / util / jitdump.c

// 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>
#include <fcntl.h>
#include <unistd.h>
#include <inttypes.h>
#include <byteswap.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <linux/stringify.h>

#include "build-id.h"
#include "event.h"
#include "debug.h"
#include "evlist.h"
#include "symbol.h"
#include <elf.h>

#include "tsc.h"
#include "session.h"
#include "jit.h"
#include "jitdump.h"
#include "genelf.h"

#include <linux/ctype.h>
#include <linux/zalloc.h>

struct jit_buf_desc {
	struct perf_data *output;
	struct perf_session *session;
	struct machine *machine;
	union jr_entry   *entry;
	void             *buf;
	uint64_t	 sample_type;
	size_t           bufsize;
	FILE             *in;
	bool		 needs_bswap; /* handles cross-endianness */
	bool		 use_arch_timestamp;
	void		 *debug_data;
	void		 *unwinding_data;
	uint64_t	 unwinding_size;
	uint64_t	 unwinding_mapped_size;
	uint64_t         eh_frame_hdr_size;
	size_t		 nr_debug_entries;
	uint32_t         code_load_count;
	u64		 bytes_written;
	struct rb_root   code_root;
	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	output;
	struct perf_data	input;
	u64 bytes_written;
};

#define hmax(a, b) ((a) > (b) ? (a) : (b))
#define get_jit_tool(t) (container_of(tool, struct jit_tool, tool))

static int
jit_emit_elf(char *filename,
	     const char *sym,
	     uint64_t code_addr,
	     const void *code,
	     int csize,
	     void *debug,
	     int nr_debug_entries,
	     void *unwinding,
	     uint32_t unwinding_header_size,
	     uint32_t unwinding_size)
{
	int ret, fd;

	if (verbose > 0)
		fprintf(stderr, "write ELF image %s\n", filename);

	fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644);
	if (fd == -1) {
		pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno));
		return -1;
	}

	ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries,
			    unwinding, unwinding_header_size, unwinding_size);

        close(fd);

        if (ret)
                unlink(filename);

	return ret;
}

static void
jit_close(struct jit_buf_desc *jd)
{
	if (!(jd && jd->in))
		return;
	funlockfile(jd->in);
	fclose(jd->in);
	jd->in = NULL;
}

static int
jit_validate_events(struct perf_session *session)
{
	struct evsel *evsel;

	/*
	 * check that all events use CLOCK_MONOTONIC
	 */
	evlist__for_each_entry(session->evlist, evsel) {
		if (evsel->core.attr.use_clockid == 0 || evsel->core.attr.clockid != CLOCK_MONOTONIC)
			return -1;
	}
	return 0;
}

static int
jit_open(struct jit_buf_desc *jd, const char *name)
{
	struct jitheader header;
	struct jr_prefix *prefix;
	ssize_t bs, bsz = 0;
	void *n, *buf = NULL;
	int ret, retval = -1;

	jd->in = fopen(name, "r");
	if (!jd->in)
		return -1;

	bsz = hmax(sizeof(header), sizeof(*prefix));

	buf = malloc(bsz);
	if (!buf)
		goto error;

	/*
	 * protect from writer modifying the file while we are reading it
	 */
	flockfile(jd->in);

	ret = fread(buf, sizeof(header), 1, jd->in);
	if (ret != 1)
		goto error;

	memcpy(&header, buf, sizeof(header));

	if (header.magic != JITHEADER_MAGIC) {
		if (header.magic != JITHEADER_MAGIC_SW)
			goto error;
		jd->needs_bswap = true;
	}

	if (jd->needs_bswap) {
		header.version    = bswap_32(header.version);
		header.total_size = bswap_32(header.total_size);
		header.pid	  = bswap_32(header.pid);
		header.elf_mach   = bswap_32(header.elf_mach);
		header.timestamp  = bswap_64(header.timestamp);
		header.flags      = bswap_64(header.flags);
	}

	jd->use_arch_timestamp = header.flags & JITDUMP_FLAGS_ARCH_TIMESTAMP;

	if (verbose > 2)
		pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\nuse_arch_timestamp=%d\n",
			header.version,
			header.total_size,
			(unsigned long long)header.timestamp,
			header.pid,
			header.elf_mach,
			jd->use_arch_timestamp);

	if (header.version > JITHEADER_VERSION) {
		pr_err("wrong jitdump version %u, expected " __stringify(JITHEADER_VERSION),
			header.version);
		goto error;
	}

	if (header.flags & JITDUMP_FLAGS_RESERVED) {
		pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",
		       (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);
		goto error;
	}

	if (jd->use_arch_timestamp && !jd->session->time_conv.time_mult) {
		pr_err("jitdump file uses arch timestamps but there is no timestamp conversion\n");
		goto error;
	}

	/*
	 * validate event is using the correct clockid
	 */
	if (!jd->use_arch_timestamp && jit_validate_events(jd->session)) {
		pr_err("error, jitted code must be sampled with perf record -k 1\n");
		goto error;
	}

	bs = header.total_size - sizeof(header);

	if (bs > bsz) {
		n = realloc(buf, bs);
		if (!n)
			goto error;
		bsz = bs;
		buf = n;
		/* read extra we do not know about */
		ret = fread(buf, bs - bsz, 1, jd->in);
		if (ret != 1)
			goto error;
	}
	/*
	 * keep dirname for generating files and mmap records
	 */
	strcpy(jd->dir, name);
	dirname(jd->dir);

	return 0;
error:
	funlockfile(jd->in);
	fclose(jd->in);
	return retval;
}

static union jr_entry *
jit_get_next_entry(struct jit_buf_desc *jd)
{
	struct jr_prefix *prefix;
	union jr_entry *jr;
	void *addr;
	size_t bs, size;
	int id, ret;

	if (!(jd && jd->in))
		return NULL;

	if (jd->buf == NULL) {
		size_t sz = getpagesize();
		if (sz < sizeof(*prefix))
			sz = sizeof(*prefix);

		jd->buf = malloc(sz);
		if (jd->buf == NULL)
			return NULL;

		jd->bufsize = sz;
	}

	prefix = jd->buf;

	/*
	 * file is still locked at this point
	 */
	ret = fread(prefix, sizeof(*prefix), 1, jd->in);
	if (ret  != 1)
		return NULL;

	if (jd->needs_bswap) {
		prefix->id   	   = bswap_32(prefix->id);
		prefix->total_size = bswap_32(prefix->total_size);
		prefix->timestamp  = bswap_64(prefix->timestamp);
	}
	id   = prefix->id;
	size = prefix->total_size;

	bs = (size_t)size;
	if (bs < sizeof(*prefix))
		return NULL;

	if (id >= JIT_CODE_MAX) {
		pr_warning("next_entry: unknown record type %d, skipping\n", id);
	}
	if (bs > jd->bufsize) {
		void *n;
		n = realloc(jd->buf, bs);
		if (!n)
			return NULL;
		jd->buf = n;
		jd->bufsize = bs;
	}

	addr = ((void *)jd->buf) + sizeof(*prefix);

	ret = fread(addr, bs - sizeof(*prefix), 1, jd->in);
	if (ret != 1)
		return NULL;

	jr = (union jr_entry *)jd->buf;

	switch(id) {
	case JIT_CODE_DEBUG_INFO:
		if (jd->needs_bswap) {
			uint64_t n;
			jr->info.code_addr = bswap_64(jr->info.code_addr);
			jr->info.nr_entry  = bswap_64(jr->info.nr_entry);
			for (n = 0 ; n < jr->info.nr_entry; n++) {
				jr->info.entries[n].addr    = bswap_64(jr->info.entries[n].addr);
				jr->info.entries[n].lineno  = bswap_32(jr->info.entries[n].lineno);
				jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim);
			}
		}
		break;
	case JIT_CODE_UNWINDING_INFO:
		if (jd->needs_bswap) {
			jr->unwinding.unwinding_size = bswap_64(jr->unwinding.unwinding_size);
			jr->unwinding.eh_frame_hdr_size = bswap_64(jr->unwinding.eh_frame_hdr_size);
			jr->unwinding.mapped_size = bswap_64(jr->unwinding.mapped_size);
		}
		break;
	case JIT_CODE_CLOSE:
		break;
	case JIT_CODE_LOAD:
		if (jd->needs_bswap) {
			jr->load.pid       = bswap_32(jr->load.pid);
			jr->load.tid       = bswap_32(jr->load.tid);
			jr->load.vma       = bswap_64(jr->load.vma);
			jr->load.code_addr = bswap_64(jr->load.code_addr);
			jr->load.code_size = bswap_64(jr->load.code_size);
			jr->load.code_index= bswap_64(jr->load.code_index);
		}
		jd->code_load_count++;
		break;
	case JIT_CODE_MOVE:
		if (jd->needs_bswap) {
			jr->move.pid           = bswap_32(jr->move.pid);
			jr->move.tid           = bswap_32(jr->move.tid);
			jr->move.vma           = bswap_64(jr->move.vma);
			jr->move.old_code_addr = bswap_64(jr->move.old_code_addr);
			jr->move.new_code_addr = bswap_64(jr->move.new_code_addr);
			jr->move.code_size     = bswap_64(jr->move.code_size);
			jr->move.code_index    = bswap_64(jr->move.code_index);
		}
		break;
	case JIT_CODE_MAX:
	default:
		/* skip unknown record (we have read them) */
		break;
	}
	return jr;
}

static int
jit_inject_event(struct jit_buf_desc *jd, union perf_event *event)
{
	ssize_t size;

	size = perf_data__write(jd->output, event, event->header.size);
	if (size < 0)
		return -1;

	jd->bytes_written += size;
	return 0;
}

static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp)
{
	struct perf_tsc_conversion tc;

	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;

	if (!tc.time_mult)
		return 0;

	return tsc_to_perf_time(timestamp, &tc);
}

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;
	uint64_t code, addr;
	uintptr_t uaddr;
	char *filename;
	struct stat st;
	size_t size;
	u16 idr_size;
	const char *sym;
	uint32_t count;
	int ret, csize, usize;
	pid_t pid, tid;
	struct {
		u32 pid, tid;
		u64 time;
	} *id;

	pid   = jr->load.pid;
	tid   = jr->load.tid;
	csize = jr->load.code_size;
	usize = jd->unwinding_mapped_size;
	addr  = jr->load.code_addr;
	sym   = (void *)((unsigned long)jr + sizeof(jr->load));
	code  = (unsigned long)jr + jr->load.p.total_size - csize;
	count = jr->load.code_index;
	idr_size = jd->machine->id_hdr_size;

	event = calloc(1, sizeof(*event) + idr_size);
	if (!event)
		return -1;

	filename = event->mmap2.filename;
	size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so",
			jd->dir,
			pid,
			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,
			   jd->unwinding_data, jd->eh_frame_hdr_size, jd->unwinding_size);

	if (jd->debug_data && jd->nr_debug_entries) {
		zfree(&jd->debug_data);
		jd->nr_debug_entries = 0;
	}

	if (jd->unwinding_data && jd->eh_frame_hdr_size) {
		zfree(&jd->unwinding_data);
		jd->eh_frame_hdr_size = 0;
		jd->unwinding_mapped_size = 0;
		jd->unwinding_size = 0;
	}

	if (ret) {
		free(event);
		return -1;
	}
	if (stat(filename, &st))
		memset(&st, 0, sizeof(st));

	event->mmap2.header.type = PERF_RECORD_MMAP2;
	event->mmap2.header.misc = PERF_RECORD_MISC_USER;
	event->mmap2.header.size = (sizeof(event->mmap2) -
			(sizeof(event->mmap2.filename) - size) + idr_size);

	event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
	event->mmap2.start = addr;
	event->mmap2.len   = usize ? ALIGN_8(csize) + usize : csize;
	event->mmap2.pid   = pid;
	event->mmap2.tid   = tid;
	event->mmap2.ino   = st.st_ino;
	event->mmap2.maj   = major(st.st_dev);
	event->mmap2.min   = minor(st.st_dev);
	event->mmap2.prot  = st.st_mode;
	event->mmap2.flags = MAP_SHARED;
	event->mmap2.ino_generation = 1;

	id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
	if (jd->sample_type & PERF_SAMPLE_TID) {
		id->pid  = pid;
		id->tid  = tid;
	}
	if (jd->sample_type & PERF_SAMPLE_TIME)
		id->time = convert_timestamp(jd, jr->load.p.timestamp);

	/*
	 * create pseudo sample to induce dso hit increment
	 * use first address as sample address
	 */
	memset(&sample, 0, sizeof(sample));
	sample.cpumode = PERF_RECORD_MISC_USER;
	sample.pid  = pid;
	sample.tid  = tid;
	sample.time = id->time;
	sample.ip   = addr;

	ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
	if (ret)
		return ret;

	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);

	return ret;
}

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;
	char *filename;
	size_t size;
	struct stat st;
	int usize;
	u16 idr_size;
	int ret;
	pid_t pid, tid;
	struct {
		u32 pid, tid;
		u64 time;
	} *id;

	pid = jr->move.pid;
	tid =  jr->move.tid;
	usize = jd->unwinding_mapped_size;
	idr_size = jd->machine->id_hdr_size;

	/*
	 * +16 to account for sample_id_all (hack)
	 */
	event = calloc(1, sizeof(*event) + 16);
	if (!event)
		return -1;

	filename = event->mmap2.filename;
	size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64,
	         jd->dir,
	         pid,
		 jr->move.code_index);

	size++; /* for \0 */

	if (stat(filename, &st))
		memset(&st, 0, sizeof(st));

	size = PERF_ALIGN(size, sizeof(u64));

	event->mmap2.header.type = PERF_RECORD_MMAP2;
	event->mmap2.header.misc = PERF_RECORD_MISC_USER;
	event->mmap2.header.size = (sizeof(event->mmap2) -
			(sizeof(event->mmap2.filename) - size) + idr_size);
	event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
	event->mmap2.start = jr->move.new_code_addr;
	event->mmap2.len   = usize ? ALIGN_8(jr->move.code_size) + usize
				   : jr->move.code_size;
	event->mmap2.pid   = pid;
	event->mmap2.tid   = tid;
	event->mmap2.ino   = st.st_ino;
	event->mmap2.maj   = major(st.st_dev);
	event->mmap2.min   = minor(st.st_dev);
	event->mmap2.prot  = st.st_mode;
	event->mmap2.flags = MAP_SHARED;
	event->mmap2.ino_generation = 1;

	id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
	if (jd->sample_type & PERF_SAMPLE_TID) {
		id->pid  = pid;
		id->tid  = tid;
	}
	if (jd->sample_type & PERF_SAMPLE_TIME)
		id->time = convert_timestamp(jd, jr->load.p.timestamp);

	/*
	 * create pseudo sample to induce dso hit increment
	 * use first address as sample address
	 */
	memset(&sample, 0, sizeof(sample));
	sample.cpumode = PERF_RECORD_MISC_USER;
	sample.pid  = pid;
	sample.tid  = tid;
	sample.time = id->time;
	sample.ip   = jr->move.new_code_addr;

	ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
	if (ret)
		return ret;

	ret = jit_inject_event(jd, event);
	if (!ret)
		build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);

	return ret;
}

static int jit_repipe_debug_info(struct jit_buf_desc *jd, union jr_entry *jr)
{
	void *data;
	size_t sz;

	if (!(jd && jr))
		return -1;

	sz  = jr->prefix.total_size - sizeof(jr->info);
	data = malloc(sz);
	if (!data)
		return -1;

	memcpy(data, &jr->info.entries, sz);

	jd->debug_data       = data;

	/*
	 * we must use nr_entry instead of size here because
	 * we cannot distinguish actual entry from padding otherwise
	 */
	jd->nr_debug_entries = jr->info.nr_entry;

	return 0;
}

static int
jit_repipe_unwinding_info(struct jit_buf_desc *jd, union jr_entry *jr)
{
	void *unwinding_data;
	uint32_t unwinding_data_size;

	if (!(jd && jr))
		return -1;

	unwinding_data_size  = jr->prefix.total_size - sizeof(jr->unwinding);
	unwinding_data = malloc(unwinding_data_size);
	if (!unwinding_data)
		return -1;

	memcpy(unwinding_data, &jr->unwinding.unwinding_data,
	       unwinding_data_size);

	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;
	jd->unwinding_data = unwinding_data;

	return 0;
}

static int
jit_process_dump(struct jit_buf_desc *jd)
{
	union jr_entry *jr;
	int ret = 0;

	while ((jr = jit_get_next_entry(jd))) {
		switch(jr->prefix.id) {
		case JIT_CODE_LOAD:
			ret = jit_repipe_code_load(jd, jr);
			break;
		case JIT_CODE_MOVE:
			ret = jit_repipe_code_move(jd, jr);
			break;
		case JIT_CODE_DEBUG_INFO:
			ret = jit_repipe_debug_info(jd, jr);
			break;
		case JIT_CODE_UNWINDING_INFO:
			ret = jit_repipe_unwinding_info(jd, jr);
			break;
		default:
			ret = 0;
			continue;
		}
	}
	return ret;
}

static int
jit_inject(struct jit_buf_desc *jd, char *path)
{
	int ret;

	if (verbose > 0)
		fprintf(stderr, "injecting: %s\n", path);

	ret = jit_open(jd, path);
	if (ret)
		return -1;

	ret = jit_process_dump(jd);

	jit_close(jd);

	if (verbose > 0)
		fprintf(stderr, "injected: %s (%d)\n", path, ret);

	return 0;
}

/*
 * File must be with pattern .../jit-XXXX.dump
 * where XXXX is the PID of the process which did the mmap()
 * as captured in the RECORD_MMAP record
 */
static int
jit_detect(char *mmap_name, pid_t pid)
 {
	char *p;
	char *end = NULL;
	pid_t pid2;

	if (verbose > 2)
		fprintf(stderr, "jit marker trying : %s\n", mmap_name);
	/*
	 * get file name
	 */
	p = strrchr(mmap_name, '/');
	if (!p)
		return -1;

	/*
	 * match prefix
	 */
	if (strncmp(p, "/jit-", 5))
		return -1;

	/*
	 * skip prefix
	 */
	p += 5;

	/*
	 * must be followed by a pid
	 */
	if (!isdigit(*p))
		return -1;

	pid2 = (int)strtol(p, &end, 10);
	if (!end)
		return -1;

	/*
	 * pid does not match mmap pid
	 * pid==0 in system-wide mode (synthesized)
	 */
	if (pid && pid2 != pid)
		return -1;
	/*
	 * validate suffix
	 */
	if (strcmp(end, ".dump"))
		return -1;

	if (verbose > 0)
		fprintf(stderr, "jit marker found: %s\n", mmap_name);

	return 0;
}

int
jit_process(struct perf_session *session,
	    struct perf_data *output,
	    struct machine *machine,
	    char *filename,
	    pid_t pid,
	    u64 *nbytes)
{
	struct evsel *first;
	struct jit_buf_desc jd;
	int ret;

	/*
	 * first, detect marker mmap (i.e., the jitdump mmap)
	 */
	if (jit_detect(filename, pid))
		return 0;

	memset(&jd, 0, sizeof(jd));

	jd.session = session;
	jd.output  = output;
	jd.machine = machine;

	/*
	 * track sample_type to compute id_all layout
	 * perf sets the same sample type to all events as of now
	 */
	first = evlist__first(session->evlist);
	jd.sample_type = first->core.attr.sample_type;

	*nbytes = 0;

	ret = jit_inject(&jd, filename);
	if (!ret) {
		*nbytes = jd.bytes_written;
		ret = 1;
	}

	return ret;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
49a7f010	2	#include <sys/sysmacros.h>
9b07e27f	3	#include <sys/types.h>
a43783ae	4	#include <errno.h>
68c0188e	5	#include <libgen.h>
9b07e27f SE	6	#include <stdio.h>
	7	#include <stdlib.h>
	8	#include <string.h>
	9	#include <fcntl.h>
	10	#include <unistd.h>
	11	#include <inttypes.h>
	12	#include <byteswap.h>
	13	#include <sys/stat.h>
	14	#include <sys/mman.h>
aa8cc2f6	15	#include <linux/stringify.h>
9b07e27f	16
4a3cec84	17	#include "build-id.h"
9b07e27f SE	18	#include "event.h"
	19	#include "debug.h"
	20	#include "evlist.h"
	21	#include "symbol.h"
9b07e27f SE	22	#include <elf.h>
9b07e27f SE	23
2a28e230	24	#include "tsc.h"
9b07e27f SE	25	#include "session.h"
	26	#include "jit.h"
	27	#include "jitdump.h"
	28	#include "genelf.h"
9b07e27f	29
3052ba56	30	#include <linux/ctype.h>
d8f9da24	31	#include <linux/zalloc.h>
3d689ed6	32
9b07e27f	33	struct jit_buf_desc {
8ceb41d7	34	struct perf_data *output;
9b07e27f SE	35	struct perf_session *session;
	36	struct machine *machine;
	37	union jr_entry *entry;
	38	void *buf;
	39	uint64_t sample_type;
	40	size_t bufsize;
	41	FILE *in;
adba1634	42	bool needs_bswap; /* handles cross-endianness */
2a28e230	43	bool use_arch_timestamp;
9b07e27f	44	void *debug_data;
0284fecd SS	45	void *unwinding_data;
	46	uint64_t unwinding_size;
	47	uint64_t unwinding_mapped_size;
	48	uint64_t eh_frame_hdr_size;
9b07e27f SE	49	size_t nr_debug_entries;
	50	uint32_t code_load_count;
	51	u64 bytes_written;
	52	struct rb_root code_root;
	53	char dir[PATH_MAX];
	54	};
	55
	56	struct debug_line_info {
	57	unsigned long vma;
	58	unsigned int lineno;
	59	/* The filename format is unspecified, absolute path, relative etc. */
	60	char const filename[0];
	61	};
	62
	63	struct jit_tool {
	64	struct perf_tool tool;
8ceb41d7 JO	65	struct perf_data output;
8ceb41d7 JO	66	struct perf_data input;
9b07e27f SE	67	u64 bytes_written;
	68	};
	69
	70	#define hmax(a, b) ((a) > (b) ? (a) : (b))
	71	#define get_jit_tool(t) (container_of(tool, struct jit_tool, tool))
	72
	73	static int
	74	jit_emit_elf(char *filename,
	75	const char *sym,
	76	uint64_t code_addr,
	77	const void *code,
598b7c69 SE	78	int csize,
598b7c69 SE	79	void *debug,
086f9f3d SS	80	int nr_debug_entries,
	81	void *unwinding,
	82	uint32_t unwinding_header_size,
	83	uint32_t unwinding_size)
9b07e27f SE	84	{
	85	int ret, fd;
	86
	87	if (verbose > 0)
	88	fprintf(stderr, "write ELF image %s\n", filename);
	89
	90	fd = open(filename, O_CREAT\|O_TRUNC\|O_WRONLY, 0644);
	91	if (fd == -1) {
	92	pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno));
	93	return -1;
	94	}
	95
086f9f3d SS	96	ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries,
086f9f3d SS	97	unwinding, unwinding_header_size, unwinding_size);
9b07e27f SE	98
	99	close(fd);
	100
	101	if (ret)
	102	unlink(filename);
	103
	104	return ret;
	105	}
	106
	107	static void
	108	jit_close(struct jit_buf_desc *jd)
	109	{
	110	if (!(jd && jd->in))
	111	return;
	112	funlockfile(jd->in);
	113	fclose(jd->in);
	114	jd->in = NULL;
	115	}
	116
4a018cc4 AH	117	static int
	118	jit_validate_events(struct perf_session *session)
	119	{
32dcd021	120	struct evsel *evsel;
4a018cc4 AH	121
	122	/*
	123	* check that all events use CLOCK_MONOTONIC
	124	*/
e5cadb93	125	evlist__for_each_entry(session->evlist, evsel) {
1fc632ce	126	if (evsel->core.attr.use_clockid == 0 \|\| evsel->core.attr.clockid != CLOCK_MONOTONIC)
4a018cc4 AH	127	return -1;
	128	}
	129	return 0;
	130	}
	131
9b07e27f SE	132	static int
	133	jit_open(struct jit_buf_desc jd, const char name)
	134	{
	135	struct jitheader header;
	136	struct jr_prefix *prefix;
	137	ssize_t bs, bsz = 0;
	138	void n, buf = NULL;
	139	int ret, retval = -1;
	140
	141	jd->in = fopen(name, "r");
	142	if (!jd->in)
	143	return -1;
	144
	145	bsz = hmax(sizeof(header), sizeof(*prefix));
	146
	147	buf = malloc(bsz);
	148	if (!buf)
	149	goto error;
	150
	151	/*
	152	* protect from writer modifying the file while we are reading it
	153	*/
	154	flockfile(jd->in);
	155
	156	ret = fread(buf, sizeof(header), 1, jd->in);
	157	if (ret != 1)
	158	goto error;
	159
	160	memcpy(&header, buf, sizeof(header));
	161
	162	if (header.magic != JITHEADER_MAGIC) {
	163	if (header.magic != JITHEADER_MAGIC_SW)
	164	goto error;
	165	jd->needs_bswap = true;
	166	}
	167
	168	if (jd->needs_bswap) {
	169	header.version = bswap_32(header.version);
	170	header.total_size = bswap_32(header.total_size);
	171	header.pid = bswap_32(header.pid);
	172	header.elf_mach = bswap_32(header.elf_mach);
	173	header.timestamp = bswap_64(header.timestamp);
	174	header.flags = bswap_64(header.flags);
	175	}
	176
2a28e230 AH	177	jd->use_arch_timestamp = header.flags & JITDUMP_FLAGS_ARCH_TIMESTAMP;
2a28e230 AH	178
9b07e27f	179	if (verbose > 2)
2a28e230	180	pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\nuse_arch_timestamp=%d\n",
9b07e27f SE	181	header.version,
	182	header.total_size,
	183	(unsigned long long)header.timestamp,
	184	header.pid,
2a28e230 AH	185	header.elf_mach,
2a28e230 AH	186	jd->use_arch_timestamp);
9b07e27f	187
6760d77b	188	if (header.version > JITHEADER_VERSION) {
aa8cc2f6	189	pr_err("wrong jitdump version %u, expected " __stringify(JITHEADER_VERSION),
6760d77b SS	190	header.version);
	191	goto error;
	192	}
	193
9b07e27f SE	194	if (header.flags & JITDUMP_FLAGS_RESERVED) {
	195	pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n",
	196	(unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED);
	197	goto error;
	198	}
	199
2a28e230 AH	200	if (jd->use_arch_timestamp && !jd->session->time_conv.time_mult) {
	201	pr_err("jitdump file uses arch timestamps but there is no timestamp conversion\n");
	202	goto error;
	203	}
	204
4a018cc4 AH	205	/*
	206	* validate event is using the correct clockid
	207	*/
2a28e230	208	if (!jd->use_arch_timestamp && jit_validate_events(jd->session)) {
4a018cc4 AH	209	pr_err("error, jitted code must be sampled with perf record -k 1\n");
	210	goto error;
	211	}
	212
9b07e27f SE	213	bs = header.total_size - sizeof(header);
	214
	215	if (bs > bsz) {
	216	n = realloc(buf, bs);
	217	if (!n)
	218	goto error;
	219	bsz = bs;
	220	buf = n;
	221	/* read extra we do not know about */
	222	ret = fread(buf, bs - bsz, 1, jd->in);
	223	if (ret != 1)
	224	goto error;
	225	}
	226	/*
	227	* keep dirname for generating files and mmap records
	228	*/
	229	strcpy(jd->dir, name);
	230	dirname(jd->dir);
	231
	232	return 0;
	233	error:
	234	funlockfile(jd->in);
	235	fclose(jd->in);
	236	return retval;
	237	}
	238
	239	static union jr_entry *
	240	jit_get_next_entry(struct jit_buf_desc *jd)
	241	{
	242	struct jr_prefix *prefix;
	243	union jr_entry *jr;
	244	void *addr;
	245	size_t bs, size;
	246	int id, ret;
	247
	248	if (!(jd && jd->in))
	249	return NULL;
	250
	251	if (jd->buf == NULL) {
	252	size_t sz = getpagesize();
	253	if (sz < sizeof(*prefix))
	254	sz = sizeof(*prefix);
	255
	256	jd->buf = malloc(sz);
	257	if (jd->buf == NULL)
	258	return NULL;
	259
	260	jd->bufsize = sz;
	261	}
	262
	263	prefix = jd->buf;
	264
	265	/*
	266	* file is still locked at this point
	267	*/
	268	ret = fread(prefix, sizeof(*prefix), 1, jd->in);
	269	if (ret != 1)
	270	return NULL;
	271
	272	if (jd->needs_bswap) {
	273	prefix->id = bswap_32(prefix->id);
	274	prefix->total_size = bswap_32(prefix->total_size);
	275	prefix->timestamp = bswap_64(prefix->timestamp);
	276	}
277	id = prefix->id;
278	size = prefix->total_size;
279
280	bs = (size_t)size;
281	if (bs < sizeof(*prefix))
282	return NULL;
283
284	if (id >= JIT_CODE_MAX) {
7354ec7a	285	pr_warning("next_entry: unknown record type %d, skipping\n", id);
9b07e27f SE	286	}
	287	if (bs > jd->bufsize) {
	288	void *n;
	289	n = realloc(jd->buf, bs);
	290	if (!n)
	291	return NULL;
	292	jd->buf = n;
	293	jd->bufsize = bs;
	294	}
	295
	296	addr = ((void )jd->buf) + sizeof(prefix);
	297
	298	ret = fread(addr, bs - sizeof(*prefix), 1, jd->in);
	299	if (ret != 1)
	300	return NULL;
	301
	302	jr = (union jr_entry *)jd->buf;
	303
	304	switch(id) {
	305	case JIT_CODE_DEBUG_INFO:
	306	if (jd->needs_bswap) {
	307	uint64_t n;
	308	jr->info.code_addr = bswap_64(jr->info.code_addr);
	309	jr->info.nr_entry = bswap_64(jr->info.nr_entry);
	310	for (n = 0 ; n < jr->info.nr_entry; n++) {
	311	jr->info.entries[n].addr = bswap_64(jr->info.entries[n].addr);
	312	jr->info.entries[n].lineno = bswap_32(jr->info.entries[n].lineno);
	313	jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim);
	314	}
	315	}
	316	break;
0284fecd SS	317	case JIT_CODE_UNWINDING_INFO:
	318	if (jd->needs_bswap) {
	319	jr->unwinding.unwinding_size = bswap_64(jr->unwinding.unwinding_size);
	320	jr->unwinding.eh_frame_hdr_size = bswap_64(jr->unwinding.eh_frame_hdr_size);
	321	jr->unwinding.mapped_size = bswap_64(jr->unwinding.mapped_size);
	322	}
	323	break;
9b07e27f SE	324	case JIT_CODE_CLOSE:
	325	break;
	326	case JIT_CODE_LOAD:
	327	if (jd->needs_bswap) {
	328	jr->load.pid = bswap_32(jr->load.pid);
	329	jr->load.tid = bswap_32(jr->load.tid);
	330	jr->load.vma = bswap_64(jr->load.vma);
	331	jr->load.code_addr = bswap_64(jr->load.code_addr);
	332	jr->load.code_size = bswap_64(jr->load.code_size);
	333	jr->load.code_index= bswap_64(jr->load.code_index);
	334	}
	335	jd->code_load_count++;
	336	break;
	337	case JIT_CODE_MOVE:
	338	if (jd->needs_bswap) {
	339	jr->move.pid = bswap_32(jr->move.pid);
	340	jr->move.tid = bswap_32(jr->move.tid);
	341	jr->move.vma = bswap_64(jr->move.vma);
	342	jr->move.old_code_addr = bswap_64(jr->move.old_code_addr);
	343	jr->move.new_code_addr = bswap_64(jr->move.new_code_addr);
	344	jr->move.code_size = bswap_64(jr->move.code_size);
	345	jr->move.code_index = bswap_64(jr->move.code_index);
	346	}
	347	break;
	348	case JIT_CODE_MAX:
	349	default:
7354ec7a SS	350	/* skip unknown record (we have read them) */
7354ec7a SS	351	break;
9b07e27f SE	352	}
	353	return jr;
	354	}
	355
	356	static int
	357	jit_inject_event(struct jit_buf_desc jd, union perf_event event)
	358	{
	359	ssize_t size;
	360
8ceb41d7	361	size = perf_data__write(jd->output, event, event->header.size);
9b07e27f SE	362	if (size < 0)
	363	return -1;
	364
	365	jd->bytes_written += size;
	366	return 0;
	367	}
	368
2a28e230 AH	369	static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp)
	370	{
	371	struct perf_tsc_conversion tc;
	372
	373	if (!jd->use_arch_timestamp)
	374	return timestamp;
	375
	376	tc.time_shift = jd->session->time_conv.time_shift;
	377	tc.time_mult = jd->session->time_conv.time_mult;
	378	tc.time_zero = jd->session->time_conv.time_zero;
	379
	380	if (!tc.time_mult)
	381	return 0;
	382
	383	return tsc_to_perf_time(timestamp, &tc);
	384	}
	385
9b07e27f SE	386	static int jit_repipe_code_load(struct jit_buf_desc jd, union jr_entry jr)
	387	{
	388	struct perf_sample sample;
	389	union perf_event *event;
	390	struct perf_tool *tool = jd->session->tool;
	391	uint64_t code, addr;
	392	uintptr_t uaddr;
	393	char *filename;
	394	struct stat st;
	395	size_t size;
	396	u16 idr_size;
	397	const char *sym;
	398	uint32_t count;
0284fecd	399	int ret, csize, usize;
9b07e27f SE	400	pid_t pid, tid;
	401	struct {
	402	u32 pid, tid;
	403	u64 time;
	404	} *id;
	405
	406	pid = jr->load.pid;
	407	tid = jr->load.tid;
	408	csize = jr->load.code_size;
0284fecd	409	usize = jd->unwinding_mapped_size;
9b07e27f SE	410	addr = jr->load.code_addr;
	411	sym = (void *)((unsigned long)jr + sizeof(jr->load));
	412	code = (unsigned long)jr + jr->load.p.total_size - csize;
	413	count = jr->load.code_index;
	414	idr_size = jd->machine->id_hdr_size;
	415
	416	event = calloc(1, sizeof(*event) + idr_size);
	417	if (!event)
	418	return -1;
	419
	420	filename = event->mmap2.filename;
	421	size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so",
	422	jd->dir,
	423	pid,
	424	count);
	425
	426	size++; /* for \0 */
	427
	428	size = PERF_ALIGN(size, sizeof(u64));
	429	uaddr = (uintptr_t)code;
086f9f3d SS	430	ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries,
086f9f3d SS	431	jd->unwinding_data, jd->eh_frame_hdr_size, jd->unwinding_size);
9b07e27f SE	432
9b07e27f SE	433	if (jd->debug_data && jd->nr_debug_entries) {
d8f9da24	434	zfree(&jd->debug_data);
9b07e27f SE	435	jd->nr_debug_entries = 0;
	436	}
	437
0284fecd	438	if (jd->unwinding_data && jd->eh_frame_hdr_size) {
d8f9da24	439	zfree(&jd->unwinding_data);
0284fecd SS	440	jd->eh_frame_hdr_size = 0;
	441	jd->unwinding_mapped_size = 0;
	442	jd->unwinding_size = 0;
	443	}
	444
9b07e27f SE	445	if (ret) {
	446	free(event);
	447	return -1;
	448	}
	449	if (stat(filename, &st))
f56ebf20	450	memset(&st, 0, sizeof(st));
9b07e27f SE	451
	452	event->mmap2.header.type = PERF_RECORD_MMAP2;
	453	event->mmap2.header.misc = PERF_RECORD_MISC_USER;
	454	event->mmap2.header.size = (sizeof(event->mmap2) -
	455	(sizeof(event->mmap2.filename) - size) + idr_size);
	456
	457	event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
	458	event->mmap2.start = addr;
0284fecd	459	event->mmap2.len = usize ? ALIGN_8(csize) + usize : csize;
9b07e27f SE	460	event->mmap2.pid = pid;
	461	event->mmap2.tid = tid;
	462	event->mmap2.ino = st.st_ino;
	463	event->mmap2.maj = major(st.st_dev);
	464	event->mmap2.min = minor(st.st_dev);
	465	event->mmap2.prot = st.st_mode;
	466	event->mmap2.flags = MAP_SHARED;
	467	event->mmap2.ino_generation = 1;
	468
	469	id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
	470	if (jd->sample_type & PERF_SAMPLE_TID) {
	471	id->pid = pid;
	472	id->tid = tid;
	473	}
	474	if (jd->sample_type & PERF_SAMPLE_TIME)
2a28e230	475	id->time = convert_timestamp(jd, jr->load.p.timestamp);
9b07e27f SE	476
	477	/*
	478	* create pseudo sample to induce dso hit increment
	479	* use first address as sample address
	480	*/
	481	memset(&sample, 0, sizeof(sample));
3ea223ad	482	sample.cpumode = PERF_RECORD_MISC_USER;
9b07e27f SE	483	sample.pid = pid;
	484	sample.tid = tid;
	485	sample.time = id->time;
	486	sample.ip = addr;
	487
	488	ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
	489	if (ret)
	490	return ret;
	491
	492	ret = jit_inject_event(jd, event);
	493	/*
	494	* mark dso as use to generate buildid in the header
	495	*/
	496	if (!ret)
	497	build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
	498
	499	return ret;
	500	}
	501
	502	static int jit_repipe_code_move(struct jit_buf_desc jd, union jr_entry jr)
	503	{
	504	struct perf_sample sample;
	505	union perf_event *event;
	506	struct perf_tool *tool = jd->session->tool;
	507	char *filename;
	508	size_t size;
	509	struct stat st;
0284fecd	510	int usize;
9b07e27f SE	511	u16 idr_size;
	512	int ret;
	513	pid_t pid, tid;
	514	struct {
	515	u32 pid, tid;
	516	u64 time;
	517	} *id;
	518
	519	pid = jr->move.pid;
	520	tid = jr->move.tid;
0284fecd	521	usize = jd->unwinding_mapped_size;
9b07e27f SE	522	idr_size = jd->machine->id_hdr_size;
	523
	524	/*
	525	* +16 to account for sample_id_all (hack)
	526	*/
	527	event = calloc(1, sizeof(*event) + 16);
	528	if (!event)
	529	return -1;
	530
	531	filename = event->mmap2.filename;
	532	size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64,
	533	jd->dir,
	534	pid,
	535	jr->move.code_index);
	536
	537	size++; /* for \0 */
	538
	539	if (stat(filename, &st))
f56ebf20	540	memset(&st, 0, sizeof(st));
9b07e27f SE	541
	542	size = PERF_ALIGN(size, sizeof(u64));
	543
	544	event->mmap2.header.type = PERF_RECORD_MMAP2;
	545	event->mmap2.header.misc = PERF_RECORD_MISC_USER;
	546	event->mmap2.header.size = (sizeof(event->mmap2) -
	547	(sizeof(event->mmap2.filename) - size) + idr_size);
	548	event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET;
	549	event->mmap2.start = jr->move.new_code_addr;
0284fecd SS	550	event->mmap2.len = usize ? ALIGN_8(jr->move.code_size) + usize
0284fecd SS	551	: jr->move.code_size;
9b07e27f SE	552	event->mmap2.pid = pid;
	553	event->mmap2.tid = tid;
	554	event->mmap2.ino = st.st_ino;
	555	event->mmap2.maj = major(st.st_dev);
	556	event->mmap2.min = minor(st.st_dev);
	557	event->mmap2.prot = st.st_mode;
	558	event->mmap2.flags = MAP_SHARED;
	559	event->mmap2.ino_generation = 1;
	560
	561	id = (void *)((unsigned long)event + event->mmap.header.size - idr_size);
	562	if (jd->sample_type & PERF_SAMPLE_TID) {
	563	id->pid = pid;
	564	id->tid = tid;
	565	}
	566	if (jd->sample_type & PERF_SAMPLE_TIME)
2a28e230	567	id->time = convert_timestamp(jd, jr->load.p.timestamp);
9b07e27f SE	568
	569	/*
	570	* create pseudo sample to induce dso hit increment
	571	* use first address as sample address
	572	*/
	573	memset(&sample, 0, sizeof(sample));
3ea223ad	574	sample.cpumode = PERF_RECORD_MISC_USER;
9b07e27f SE	575	sample.pid = pid;
	576	sample.tid = tid;
	577	sample.time = id->time;
	578	sample.ip = jr->move.new_code_addr;
	579
	580	ret = perf_event__process_mmap2(tool, event, &sample, jd->machine);
	581	if (ret)
	582	return ret;
	583
	584	ret = jit_inject_event(jd, event);
	585	if (!ret)
	586	build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine);
	587
	588	return ret;
	589	}
	590
	591	static int jit_repipe_debug_info(struct jit_buf_desc jd, union jr_entry jr)
	592	{
	593	void *data;
	594	size_t sz;
	595
	596	if (!(jd && jr))
	597	return -1;
	598
	599	sz = jr->prefix.total_size - sizeof(jr->info);
	600	data = malloc(sz);
	601	if (!data)
	602	return -1;
	603
	604	memcpy(data, &jr->info.entries, sz);
	605
	606	jd->debug_data = data;
	607
	608	/*
	609	* we must use nr_entry instead of size here because
	610	* we cannot distinguish actual entry from padding otherwise
	611	*/
	612	jd->nr_debug_entries = jr->info.nr_entry;
	613
	614	return 0;
	615	}
	616
0284fecd SS	617	static int
	618	jit_repipe_unwinding_info(struct jit_buf_desc jd, union jr_entry jr)
	619	{
	620	void *unwinding_data;
	621	uint32_t unwinding_data_size;
	622
	623	if (!(jd && jr))
	624	return -1;
	625
	626	unwinding_data_size = jr->prefix.total_size - sizeof(jr->unwinding);
	627	unwinding_data = malloc(unwinding_data_size);
	628	if (!unwinding_data)
	629	return -1;
	630
	631	memcpy(unwinding_data, &jr->unwinding.unwinding_data,
	632	unwinding_data_size);
	633
	634	jd->eh_frame_hdr_size = jr->unwinding.eh_frame_hdr_size;
	635	jd->unwinding_size = jr->unwinding.unwinding_size;
	636	jd->unwinding_mapped_size = jr->unwinding.mapped_size;
	637	jd->unwinding_data = unwinding_data;
	638
	639	return 0;
	640	}
	641
9b07e27f SE	642	static int
	643	jit_process_dump(struct jit_buf_desc *jd)
	644	{
	645	union jr_entry *jr;
ef2c3e76	646	int ret = 0;
9b07e27f SE	647
	648	while ((jr = jit_get_next_entry(jd))) {
	649	switch(jr->prefix.id) {
	650	case JIT_CODE_LOAD:
	651	ret = jit_repipe_code_load(jd, jr);
	652	break;
	653	case JIT_CODE_MOVE:
	654	ret = jit_repipe_code_move(jd, jr);
	655	break;
	656	case JIT_CODE_DEBUG_INFO:
	657	ret = jit_repipe_debug_info(jd, jr);
	658	break;
0284fecd SS	659	case JIT_CODE_UNWINDING_INFO:
	660	ret = jit_repipe_unwinding_info(jd, jr);
	661	break;
9b07e27f SE	662	default:
	663	ret = 0;
	664	continue;
	665	}
	666	}
	667	return ret;
	668	}
	669
	670	static int
	671	jit_inject(struct jit_buf_desc jd, char path)
	672	{
	673	int ret;
	674
	675	if (verbose > 0)
	676	fprintf(stderr, "injecting: %s\n", path);
	677
	678	ret = jit_open(jd, path);
	679	if (ret)
	680	return -1;
	681
	682	ret = jit_process_dump(jd);
	683
	684	jit_close(jd);
	685
	686	if (verbose > 0)
	687	fprintf(stderr, "injected: %s (%d)\n", path, ret);
	688
	689	return 0;
	690	}
	691
	692	/*
	693	* File must be with pattern .../jit-XXXX.dump
	694	* where XXXX is the PID of the process which did the mmap()
	695	* as captured in the RECORD_MMAP record
	696	*/
	697	static int
	698	jit_detect(char *mmap_name, pid_t pid)
	699	{
	700	char *p;
	701	char *end = NULL;
	702	pid_t pid2;
	703
	704	if (verbose > 2)
	705	fprintf(stderr, "jit marker trying : %s\n", mmap_name);
	706	/*
	707	* get file name
	708	*/
	709	p = strrchr(mmap_name, '/');
	710	if (!p)
	711	return -1;
	712
	713	/*
	714	* match prefix
	715	*/
	716	if (strncmp(p, "/jit-", 5))
	717	return -1;
	718
	719	/*
	720	* skip prefix
	721	*/
	722	p += 5;
	723
	724	/*
	725	* must be followed by a pid
726	*/
727	if (!isdigit(*p))
728	return -1;
729
730	pid2 = (int)strtol(p, &end, 10);
731	if (!end)
732	return -1;
733
734	/*
735	* pid does not match mmap pid
736	* pid==0 in system-wide mode (synthesized)
737	*/
738	if (pid && pid2 != pid)
739	return -1;
740	/*
741	* validate suffix
742	*/
743	if (strcmp(end, ".dump"))
744	return -1;
745
746	if (verbose > 0)
747	fprintf(stderr, "jit marker found: %s\n", mmap_name);
748
749	return 0;
750	}
751
752	int
753	jit_process(struct perf_session *session,
8ceb41d7	754	struct perf_data *output,
9b07e27f SE	755	struct machine *machine,
	756	char *filename,
	757	pid_t pid,
	758	u64 *nbytes)
	759	{
32dcd021	760	struct evsel *first;
9b07e27f SE	761	struct jit_buf_desc jd;
	762	int ret;
	763
	764	/*
	765	* first, detect marker mmap (i.e., the jitdump mmap)
	766	*/
	767	if (jit_detect(filename, pid))
570735b3	768	return 0;
9b07e27f SE	769
	770	memset(&jd, 0, sizeof(jd));
	771
	772	jd.session = session;
	773	jd.output = output;
	774	jd.machine = machine;
	775
	776	/*
	777	* track sample_type to compute id_all layout
	778	* perf sets the same sample type to all events as of now
	779	*/
515dbe48	780	first = evlist__first(session->evlist);
1fc632ce	781	jd.sample_type = first->core.attr.sample_type;
9b07e27f SE	782
	783	*nbytes = 0;
	784
	785	ret = jit_inject(&jd, filename);
570735b3	786	if (!ret) {
9b07e27f	787	*nbytes = jd.bytes_written;
570735b3 AH	788	ret = 1;
570735b3 AH	789	}
9b07e27f SE	790
	791	return ret;
	792	}