mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-19 16:23:29 +00:00
11a5c93d51
It's invalid to reference a C++ string's c_str() buffer after the object
goes out of scope. Adjust the scope of the string to match the use in
write(2) to fix the misuse.
CID: 1393383
Reported by: Coverity
364 lines
9.7 KiB
C++
364 lines
9.7 KiB
C++
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2018, Matthew Macy
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/cpuset.h>
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#include <sys/event.h>
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#include <sys/queue.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/ttycom.h>
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#include <sys/user.h>
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#include <sys/wait.h>
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#include <assert.h>
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#include <curses.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <getopt.h>
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#include <kvm.h>
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#include <libgen.h>
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#include <limits.h>
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#include <locale.h>
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#include <math.h>
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#include <pmc.h>
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#include <pmclog.h>
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#include <regex.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <libpmcstat.h>
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#include "cmd_pmc.h"
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#include <string>
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#include <unordered_map>
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#include <pmcformat.h>
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using namespace std;
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using std::unordered_map;
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typedef unordered_map < int ,string > idmap;
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typedef pair < int ,string > identry;
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#define LIST_MAX 64
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static struct option longopts[] = {
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{"lwps", required_argument, NULL, 't'},
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{"pids", required_argument, NULL, 'p'},
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{"threads", required_argument, NULL, 'T'},
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{"processes", required_argument, NULL, 'P'},
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{"events", required_argument, NULL, 'e'},
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{NULL, 0, NULL, 0}
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};
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static void __dead2
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usage(void)
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{
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errx(EX_USAGE,
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"\t filter log file\n"
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"\t -e <events>, --events <events> -- comma-delimited list of events to filter on\n"
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"\t -p <pids>, --pids <pids> -- comma-delimited list of pids to filter on\n"
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"\t -P <processes>, --processes <processes> -- comma-delimited list of process names to filter on\n"
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"\t -t <lwps>, --lwps <lwps> -- comma-delimited list of lwps to filter on\n"
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"\t -T <threads>, --threads <threads> -- comma-delimited list of thread names to filter on\n"
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"\t -x -- toggle inclusive filtering\n"
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);
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}
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static void
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parse_intlist(char *strlist, uint32_t *intlist, int *pcount, int (*fn) (const char *))
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{
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char *token;
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int count, tokenval;
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count = 0;
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while ((token = strsep(&strlist, ",")) != NULL &&
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count < LIST_MAX) {
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if ((tokenval = fn(token)) < 0)
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errx(EX_USAGE, "ERROR: %s not usable value", token);
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intlist[count++] = tokenval;
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}
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*pcount = count;
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}
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static void
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parse_events(char *strlist, uint32_t intlist[LIST_MAX], int *pcount, char *cpuid)
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{
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char *token;
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int count, tokenval;
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count = 0;
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while ((token = strsep(&strlist, ",")) != NULL &&
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count < LIST_MAX) {
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if ((tokenval = pmc_pmu_idx_get_by_event(cpuid, token)) < 0)
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errx(EX_USAGE, "ERROR: %s not usable value", token);
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intlist[count++] = tokenval;
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}
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*pcount = count;
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}
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static void
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parse_names(char *strlist, char *namelist[LIST_MAX], int *pcount)
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{
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char *token;
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int count;
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count = 0;
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while ((token = strsep(&strlist, ",")) != NULL &&
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count < LIST_MAX) {
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namelist[count++] = token;
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}
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*pcount = count;
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}
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struct pmcid_ent {
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uint32_t pe_pmcid;
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uint32_t pe_idx;
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};
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#define _PMCLOG_TO_HEADER(T,L) \
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((PMCLOG_HEADER_MAGIC << 24) | \
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(PMCLOG_TYPE_ ## T << 16) | \
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((L) & 0xFFFF))
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static bool
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pmc_find_name(idmap & map, uint32_t id, char *list[LIST_MAX], int count)
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{
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int i;
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auto kvpair = map.find(id);
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if (kvpair == map.end()) {
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printf("unknown id: %d\n", id);
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return (false);
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}
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auto p = list;
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for (i = 0; i < count; i++, p++) {
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if (strstr(kvpair->second.c_str(), *p) != NULL)
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return (true);
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}
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return (false);
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}
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static void
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pmc_log_event(int fd, struct pmclog_ev *ev, bool json)
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{
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string ret;
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int len;
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const void *buf;
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if (json) {
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ret = event_to_json(ev);
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buf = ret.c_str();
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len = ret.size();
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} else {
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len = ev->pl_len;
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buf = ev->pl_data;
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}
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if (write(fd, buf, len) != (ssize_t)len)
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errx(EX_OSERR, "ERROR: failed output write");
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}
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static void
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pmc_filter_handler(uint32_t *lwplist, int lwpcount, uint32_t *pidlist, int pidcount,
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char *events, char *processes, char *threads, bool exclusive, bool json, int infd,
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int outfd)
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{
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struct pmclog_ev ev;
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struct pmclog_parse_state *ps;
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struct pmcid_ent *pe;
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uint32_t eventlist[LIST_MAX];
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char cpuid[PMC_CPUID_LEN];
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char *proclist[LIST_MAX];
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char *threadlist[LIST_MAX];
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int i, pmccount, copies, eventcount;
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int proccount, threadcount;
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uint32_t idx;
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idmap pidmap, tidmap;
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if ((ps = static_cast < struct pmclog_parse_state *>(pmclog_open(infd)))== NULL)
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errx(EX_OSERR, "ERROR: Cannot allocate pmclog parse state: %s\n", strerror(errno));
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threadcount = proccount = eventcount = pmccount = 0;
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if (processes)
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parse_names(processes, proclist, &proccount);
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if (threads)
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parse_names(threads, threadlist, &threadcount);
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while (pmclog_read(ps, &ev) == 0) {
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if (ev.pl_type == PMCLOG_TYPE_INITIALIZE)
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memcpy(cpuid, ev.pl_u.pl_i.pl_cpuid, PMC_CPUID_LEN);
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if (ev.pl_type == PMCLOG_TYPE_PMCALLOCATE)
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pmccount++;
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}
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if (events)
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parse_events(events, eventlist, &eventcount, cpuid);
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lseek(infd, 0, SEEK_SET);
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pmclog_close(ps);
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if ((ps = static_cast < struct pmclog_parse_state *>(pmclog_open(infd)))== NULL)
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errx(EX_OSERR, "ERROR: Cannot allocate pmclog parse state: %s\n", strerror(errno));
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if ((pe = (struct pmcid_ent *) malloc(sizeof(*pe) * pmccount)) == NULL)
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errx(EX_OSERR, "ERROR: failed to allocate pmcid map");
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i = 0;
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while (pmclog_read(ps, &ev) == 0 && i < pmccount) {
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if (ev.pl_type == PMCLOG_TYPE_PMCALLOCATE) {
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pe[i].pe_pmcid = ev.pl_u.pl_a.pl_pmcid;
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pe[i].pe_idx = ev.pl_u.pl_a.pl_event;
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i++;
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}
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}
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lseek(infd, 0, SEEK_SET);
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pmclog_close(ps);
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if ((ps = static_cast < struct pmclog_parse_state *>(pmclog_open(infd)))== NULL)
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errx(EX_OSERR, "ERROR: Cannot allocate pmclog parse state: %s\n", strerror(errno));
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copies = 0;
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while (pmclog_read(ps, &ev) == 0) {
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if (ev.pl_type == PMCLOG_TYPE_THR_CREATE)
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tidmap[ev.pl_u.pl_tc.pl_tid] = ev.pl_u.pl_tc.pl_tdname;
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if (ev.pl_type == PMCLOG_TYPE_PROC_CREATE)
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pidmap[ev.pl_u.pl_pc.pl_pid] = ev.pl_u.pl_pc.pl_pcomm;
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if (ev.pl_type != PMCLOG_TYPE_CALLCHAIN) {
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pmc_log_event(outfd, &ev, json);
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continue;
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}
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if (pidcount) {
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for (i = 0; i < pidcount; i++)
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if (pidlist[i] == ev.pl_u.pl_cc.pl_pid)
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break;
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if ((i == pidcount) == exclusive)
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continue;
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}
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if (lwpcount) {
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for (i = 0; i < lwpcount; i++)
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if (lwplist[i] == ev.pl_u.pl_cc.pl_tid)
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break;
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if ((i == lwpcount) == exclusive)
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continue;
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}
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if (eventcount) {
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for (i = 0; i < pmccount; i++) {
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if (pe[i].pe_pmcid == ev.pl_u.pl_cc.pl_pmcid)
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break;
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}
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if (i == pmccount)
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errx(EX_USAGE, "ERROR: unallocated pmcid: %d\n",
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ev.pl_u.pl_cc.pl_pmcid);
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idx = pe[i].pe_idx;
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for (i = 0; i < eventcount; i++) {
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if (idx == eventlist[i])
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break;
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}
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if ((i == eventcount) == exclusive)
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continue;
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}
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if (proccount &&
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pmc_find_name(pidmap, ev.pl_u.pl_cc.pl_pid, proclist, proccount) == exclusive)
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continue;
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if (threadcount &&
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pmc_find_name(tidmap, ev.pl_u.pl_cc.pl_tid, threadlist, threadcount) == exclusive)
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continue;
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pmc_log_event(outfd, &ev, json);
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}
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}
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int
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cmd_pmc_filter(int argc, char **argv)
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{
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char *lwps, *pids, *events, *processes, *threads;
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uint32_t lwplist[LIST_MAX];
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uint32_t pidlist[LIST_MAX];
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int option, lwpcount, pidcount;
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int prelogfd, postlogfd;
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bool exclusive, json;
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threads = processes = lwps = pids = events = NULL;
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lwpcount = pidcount = 0;
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json = exclusive = false;
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while ((option = getopt_long(argc, argv, "e:jp:t:xP:T:", longopts, NULL)) != -1) {
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switch (option) {
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case 'e':
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events = strdup(optarg);
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break;
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case 'j':
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json = true;
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break;
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case 'p':
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pids = strdup(optarg);
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break;
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case 'P':
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processes = strdup(optarg);
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break;
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case 't':
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lwps = strdup(optarg);
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break;
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case 'T':
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threads = strdup(optarg);
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break;
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case 'x':
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exclusive = !exclusive;
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break;
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case '?':
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 2)
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usage();
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if (lwps)
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parse_intlist(lwps, lwplist, &lwpcount, atoi);
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if (pids)
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parse_intlist(pids, pidlist, &pidcount, atoi);
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if ((prelogfd = open(argv[0], O_RDONLY,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0)
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errx(EX_OSERR, "ERROR: Cannot open \"%s\" for reading: %s.", argv[0],
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strerror(errno));
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if ((postlogfd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC,
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S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0)
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errx(EX_OSERR, "ERROR: Cannot open \"%s\" for writing: %s.", argv[1],
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strerror(errno));
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pmc_filter_handler(lwplist, lwpcount, pidlist, pidcount, events,
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processes, threads, exclusive, json, prelogfd, postlogfd);
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return (0);
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}
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