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2025cf9e19
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.208660670@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
153 lines
2.8 KiB
C
153 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* intel_pt_log.c: Intel Processor Trace support
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* Copyright (c) 2013-2014, Intel Corporation.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include "intel-pt-log.h"
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#include "intel-pt-insn-decoder.h"
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#include "intel-pt-pkt-decoder.h"
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#define MAX_LOG_NAME 256
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static FILE *f;
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static char log_name[MAX_LOG_NAME];
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bool intel_pt_enable_logging;
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void *intel_pt_log_fp(void)
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{
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return f;
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}
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void intel_pt_log_enable(void)
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{
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intel_pt_enable_logging = true;
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}
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void intel_pt_log_disable(void)
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{
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if (f)
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fflush(f);
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intel_pt_enable_logging = false;
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}
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void intel_pt_log_set_name(const char *name)
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{
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strncpy(log_name, name, MAX_LOG_NAME - 5);
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strcat(log_name, ".log");
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}
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static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos,
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int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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fprintf(f, " ");
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fprintf(f, " %08" PRIx64 ": ", pos);
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for (i = 0; i < len; i++)
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fprintf(f, " %02x", buf[i]);
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for (; i < 16; i++)
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fprintf(f, " ");
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fprintf(f, " ");
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}
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static void intel_pt_print_no_data(uint64_t pos, int indent)
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{
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int i;
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for (i = 0; i < indent; i++)
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fprintf(f, " ");
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fprintf(f, " %08" PRIx64 ": ", pos);
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for (i = 0; i < 16; i++)
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fprintf(f, " ");
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fprintf(f, " ");
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}
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static int intel_pt_log_open(void)
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{
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if (!intel_pt_enable_logging)
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return -1;
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if (f)
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return 0;
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if (!log_name[0])
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return -1;
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f = fopen(log_name, "w+");
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if (!f) {
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intel_pt_enable_logging = false;
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return -1;
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}
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return 0;
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}
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void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len,
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uint64_t pos, const unsigned char *buf)
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{
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char desc[INTEL_PT_PKT_DESC_MAX];
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if (intel_pt_log_open())
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return;
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intel_pt_print_data(buf, pkt_len, pos, 0);
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intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX);
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fprintf(f, "%s\n", desc);
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}
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void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip)
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{
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char desc[INTEL_PT_INSN_DESC_MAX];
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size_t len = intel_pt_insn->length;
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if (intel_pt_log_open())
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return;
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if (len > INTEL_PT_INSN_BUF_SZ)
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len = INTEL_PT_INSN_BUF_SZ;
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intel_pt_print_data(intel_pt_insn->buf, len, ip, 8);
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if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
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fprintf(f, "%s\n", desc);
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else
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fprintf(f, "Bad instruction!\n");
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}
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void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn,
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uint64_t ip)
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{
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char desc[INTEL_PT_INSN_DESC_MAX];
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if (intel_pt_log_open())
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return;
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intel_pt_print_no_data(ip, 8);
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if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0)
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fprintf(f, "%s\n", desc);
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else
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fprintf(f, "Bad instruction!\n");
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}
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void __intel_pt_log(const char *fmt, ...)
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{
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va_list args;
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if (intel_pt_log_open())
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return;
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va_start(args, fmt);
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vfprintf(f, fmt, args);
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va_end(args);
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}
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