mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 10:40:15 +02:00
93f8be2799
More event information is useful for debugging, especially MMAP events. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/r/20181105073505.8129-2-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
161 lines
3.2 KiB
C
161 lines
3.2 KiB
C
/*
|
|
* intel_pt_log.c: Intel Processor Trace support
|
|
* Copyright (c) 2013-2014, Intel Corporation.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <inttypes.h>
|
|
#include <stdarg.h>
|
|
#include <stdbool.h>
|
|
#include <string.h>
|
|
|
|
#include "intel-pt-log.h"
|
|
#include "intel-pt-insn-decoder.h"
|
|
|
|
#include "intel-pt-pkt-decoder.h"
|
|
|
|
#define MAX_LOG_NAME 256
|
|
|
|
static FILE *f;
|
|
static char log_name[MAX_LOG_NAME];
|
|
bool intel_pt_enable_logging;
|
|
|
|
void *intel_pt_log_fp(void)
|
|
{
|
|
return f;
|
|
}
|
|
|
|
void intel_pt_log_enable(void)
|
|
{
|
|
intel_pt_enable_logging = true;
|
|
}
|
|
|
|
void intel_pt_log_disable(void)
|
|
{
|
|
if (f)
|
|
fflush(f);
|
|
intel_pt_enable_logging = false;
|
|
}
|
|
|
|
void intel_pt_log_set_name(const char *name)
|
|
{
|
|
strncpy(log_name, name, MAX_LOG_NAME - 5);
|
|
strcat(log_name, ".log");
|
|
}
|
|
|
|
static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos,
|
|
int indent)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < indent; i++)
|
|
fprintf(f, " ");
|
|
|
|
fprintf(f, " %08" PRIx64 ": ", pos);
|
|
for (i = 0; i < len; i++)
|
|
fprintf(f, " %02x", buf[i]);
|
|
for (; i < 16; i++)
|
|
fprintf(f, " ");
|
|
fprintf(f, " ");
|
|
}
|
|
|
|
static void intel_pt_print_no_data(uint64_t pos, int indent)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < indent; i++)
|
|
fprintf(f, " ");
|
|
|
|
fprintf(f, " %08" PRIx64 ": ", pos);
|
|
for (i = 0; i < 16; i++)
|
|
fprintf(f, " ");
|
|
fprintf(f, " ");
|
|
}
|
|
|
|
static int intel_pt_log_open(void)
|
|
{
|
|
if (!intel_pt_enable_logging)
|
|
return -1;
|
|
|
|
if (f)
|
|
return 0;
|
|
|
|
if (!log_name[0])
|
|
return -1;
|
|
|
|
f = fopen(log_name, "w+");
|
|
if (!f) {
|
|
intel_pt_enable_logging = false;
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
|
|
uint64_t pos, const unsigned char *buf)
|
|
{
|
|
char desc[INTEL_PT_PKT_DESC_MAX];
|
|
|
|
if (intel_pt_log_open())
|
|
return;
|
|
|
|
intel_pt_print_data(buf, pkt_len, pos, 0);
|
|
intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);
|
|
fprintf(f, "%s\n", desc);
|
|
}
|
|
|
|
void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
|
|
{
|
|
char desc[INTEL_PT_INSN_DESC_MAX];
|
|
size_t len = intel_pt_insn->length;
|
|
|
|
if (intel_pt_log_open())
|
|
return;
|
|
|
|
if (len > INTEL_PT_INSN_BUF_SZ)
|
|
len = INTEL_PT_INSN_BUF_SZ;
|
|
intel_pt_print_data(intel_pt_insn->buf, len, ip, 8);
|
|
if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
|
|
fprintf(f, "%s\n", desc);
|
|
else
|
|
fprintf(f, "Bad instruction!\n");
|
|
}
|
|
|
|
void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
|
|
uint64_t ip)
|
|
{
|
|
char desc[INTEL_PT_INSN_DESC_MAX];
|
|
|
|
if (intel_pt_log_open())
|
|
return;
|
|
|
|
intel_pt_print_no_data(ip, 8);
|
|
if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
|
|
fprintf(f, "%s\n", desc);
|
|
else
|
|
fprintf(f, "Bad instruction!\n");
|
|
}
|
|
|
|
void __intel_pt_log(const char *fmt, ...)
|
|
{
|
|
va_list args;
|
|
|
|
if (intel_pt_log_open())
|
|
return;
|
|
|
|
va_start(args, fmt);
|
|
vfprintf(f, fmt, args);
|
|
va_end(args);
|
|
}
|