mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
![Jessica Clarke](/assets/img/avatar_default.png)
Currently the PROCEXEC event only reports a single address, entryaddr, which is the entry point of the interpreter in the typical dynamic case, and used solely to calculate the base address of the interpreter. For PDEs this is fine, since the base address is known from the program headers, but for PIEs the base address varies at run time based on where the kernel chooses to load it, and so pmcstat has no way of knowing the real address ranges for the executable. This was less of an issue in the past since PIEs were rare, but now they're on by default on 64-bit architectures it's more of a problem. To solve this, pass through what was picked for et_dyn_addr by the kernel, and use that as the offset for the executable's start address just as is done for everything in the kernel. Since we're changing this interface, sanitise the way we determine the interpreter's base address by passing it through directly rather than indirectly via the entry point and having to subtract off whatever the ELF header's e_entry is (and anything that wants the entry point in future can still add that back on as needed; this merely changes the interface to directly provide the underlying variables involved). This will be followed up by a bump to the pmc major version. Reviewed by: jhb Differential Revision: https://reviews.freebsd.org/D39595
235 lines
5.8 KiB
C
235 lines
5.8 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2005-2007 Joseph Koshy
|
|
* Copyright (c) 2007 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* Portions of this software were developed by A. Joseph Koshy under
|
|
* sponsorship from the FreeBSD Foundation and Google, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _PMCLOG_H_
|
|
#define _PMCLOG_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/pmclog.h>
|
|
|
|
enum pmclog_state {
|
|
PMCLOG_OK,
|
|
PMCLOG_EOF,
|
|
PMCLOG_REQUIRE_DATA,
|
|
PMCLOG_ERROR
|
|
};
|
|
|
|
struct pmclog_ev_callchain {
|
|
uint32_t pl_pid;
|
|
uint32_t pl_tid;
|
|
uint32_t pl_pmcid;
|
|
uint32_t pl_cpuflags;
|
|
uint32_t pl_cpuflags2;
|
|
uint32_t pl_npc;
|
|
uintfptr_t pl_pc[PMC_CALLCHAIN_DEPTH_MAX];
|
|
};
|
|
|
|
struct pmclog_ev_dropnotify {
|
|
};
|
|
|
|
struct pmclog_ev_closelog {
|
|
};
|
|
|
|
struct pmclog_ev_initialize {
|
|
uint32_t pl_version;
|
|
uint32_t pl_arch;
|
|
uint64_t pl_tsc_freq;
|
|
struct timespec pl_ts;
|
|
char pl_cpuid[PATH_MAX];
|
|
};
|
|
|
|
struct pmclog_ev_map_in {
|
|
pid_t pl_pid;
|
|
uintfptr_t pl_start;
|
|
char pl_pathname[PATH_MAX];
|
|
};
|
|
|
|
struct pmclog_ev_map_out {
|
|
pid_t pl_pid;
|
|
uintfptr_t pl_start;
|
|
uintfptr_t pl_end;
|
|
};
|
|
|
|
struct pmclog_ev_pcsample {
|
|
uintfptr_t pl_pc;
|
|
pid_t pl_pid;
|
|
pid_t pl_tid;
|
|
pmc_id_t pl_pmcid;
|
|
uint32_t pl_flags;
|
|
uint32_t pl_usermode;
|
|
};
|
|
|
|
struct pmclog_ev_pmcallocate {
|
|
const char * pl_evname;
|
|
uint64_t pl_rate;
|
|
uint32_t pl_event;
|
|
uint32_t pl_flags;
|
|
pmc_id_t pl_pmcid;
|
|
};
|
|
|
|
struct pmclog_ev_pmcallocatedyn {
|
|
char pl_evname[PMC_NAME_MAX];
|
|
uint32_t pl_event;
|
|
uint32_t pl_flags;
|
|
pmc_id_t pl_pmcid;
|
|
};
|
|
|
|
struct pmclog_ev_pmcattach {
|
|
pmc_id_t pl_pmcid;
|
|
pid_t pl_pid;
|
|
char pl_pathname[PATH_MAX];
|
|
};
|
|
|
|
struct pmclog_ev_pmcdetach {
|
|
pmc_id_t pl_pmcid;
|
|
pid_t pl_pid;
|
|
};
|
|
|
|
struct pmclog_ev_proccsw {
|
|
pid_t pl_pid;
|
|
pid_t pl_tid;
|
|
pmc_id_t pl_pmcid;
|
|
pmc_value_t pl_value;
|
|
};
|
|
|
|
struct pmclog_ev_proccreate {
|
|
pid_t pl_pid;
|
|
uint32_t pl_flags;
|
|
char pl_pcomm[MAXCOMLEN+1];
|
|
};
|
|
|
|
struct pmclog_ev_procexec {
|
|
pid_t pl_pid;
|
|
pmc_id_t pl_pmcid;
|
|
uintptr_t pl_baseaddr;
|
|
uintptr_t pl_dynaddr;
|
|
char pl_pathname[PATH_MAX];
|
|
};
|
|
|
|
struct pmclog_ev_procexit {
|
|
uint32_t pl_pid;
|
|
pmc_id_t pl_pmcid;
|
|
pmc_value_t pl_value;
|
|
};
|
|
|
|
struct pmclog_ev_procfork {
|
|
pid_t pl_oldpid;
|
|
pid_t pl_newpid;
|
|
};
|
|
|
|
struct pmclog_ev_sysexit {
|
|
pid_t pl_pid;
|
|
};
|
|
|
|
struct pmclog_ev_threadcreate {
|
|
pid_t pl_tid;
|
|
pid_t pl_pid;
|
|
uint32_t pl_flags;
|
|
char pl_tdname[MAXCOMLEN+1];
|
|
};
|
|
|
|
struct pmclog_ev_threadexit {
|
|
pid_t pl_tid;
|
|
};
|
|
|
|
struct pmclog_ev_userdata {
|
|
uint32_t pl_userdata;
|
|
};
|
|
|
|
struct pmclog_ev {
|
|
enum pmclog_state pl_state; /* state after 'get_event()' */
|
|
off_t pl_offset; /* byte offset in stream */
|
|
size_t pl_count; /* count of records so far */
|
|
struct timespec pl_ts; /* log entry timestamp */
|
|
enum pmclog_type pl_type; /* type of log entry */
|
|
void *pl_data;
|
|
int pl_len;
|
|
union { /* log entry data */
|
|
struct pmclog_ev_callchain pl_cc;
|
|
struct pmclog_ev_closelog pl_cl;
|
|
struct pmclog_ev_dropnotify pl_dn;
|
|
struct pmclog_ev_initialize pl_i;
|
|
struct pmclog_ev_map_in pl_mi;
|
|
struct pmclog_ev_map_out pl_mo;
|
|
struct pmclog_ev_pmcallocate pl_a;
|
|
struct pmclog_ev_pmcallocatedyn pl_ad;
|
|
struct pmclog_ev_pmcattach pl_t;
|
|
struct pmclog_ev_pmcdetach pl_d;
|
|
struct pmclog_ev_proccsw pl_c;
|
|
struct pmclog_ev_proccreate pl_pc;
|
|
struct pmclog_ev_procexec pl_x;
|
|
struct pmclog_ev_procexit pl_e;
|
|
struct pmclog_ev_procfork pl_f;
|
|
struct pmclog_ev_sysexit pl_se;
|
|
struct pmclog_ev_threadcreate pl_tc;
|
|
struct pmclog_ev_threadexit pl_te;
|
|
struct pmclog_ev_userdata pl_u;
|
|
} pl_u;
|
|
};
|
|
|
|
enum pmclog_parser_state {
|
|
PL_STATE_NEW_RECORD, /* in-between records */
|
|
PL_STATE_EXPECTING_HEADER, /* header being read */
|
|
PL_STATE_PARTIAL_RECORD, /* header present but not the record */
|
|
PL_STATE_ERROR /* parsing error encountered */
|
|
};
|
|
|
|
struct pmclog_parse_state {
|
|
enum pmclog_parser_state ps_state;
|
|
enum pmc_cputype ps_arch; /* log file architecture */
|
|
uint32_t ps_version; /* hwpmc version */
|
|
int ps_initialized; /* whether initialized */
|
|
int ps_count; /* count of records processed */
|
|
off_t ps_offset; /* stream byte offset */
|
|
union pmclog_entry ps_saved; /* saved partial log entry */
|
|
int ps_svcount; /* #bytes saved */
|
|
int ps_fd; /* active fd or -1 */
|
|
char *ps_buffer; /* scratch buffer if fd != -1 */
|
|
char *ps_data; /* current parse pointer */
|
|
char *ps_cpuid; /* log cpuid */
|
|
size_t ps_len; /* length of buffered data */
|
|
};
|
|
|
|
#define PMCLOG_FD_NONE (-1)
|
|
|
|
__BEGIN_DECLS
|
|
void *pmclog_open(int _fd);
|
|
int pmclog_feed(void *_cookie, char *_data, int _len);
|
|
int pmclog_read(void *_cookie, struct pmclog_ev *_ev);
|
|
void pmclog_close(void *_cookie);
|
|
__END_DECLS
|
|
|
|
#endif
|
|
|