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53af9284 AH |
1 | /* |
2 | * intel_pt_log.c: Intel Processor Trace support | |
3 | * Copyright (c) 2013-2014, Intel Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <stdio.h> | |
17 | #include <stdint.h> | |
18 | #include <inttypes.h> | |
19 | #include <stdarg.h> | |
20 | #include <stdbool.h> | |
21 | #include <string.h> | |
22 | ||
23 | #include "intel-pt-log.h" | |
24 | #include "intel-pt-insn-decoder.h" | |
25 | ||
26 | #include "intel-pt-pkt-decoder.h" | |
27 | ||
28 | #define MAX_LOG_NAME 256 | |
29 | ||
30 | static FILE *f; | |
31 | static char log_name[MAX_LOG_NAME]; | |
116f349c | 32 | bool intel_pt_enable_logging; |
53af9284 AH |
33 | |
34 | void intel_pt_log_enable(void) | |
35 | { | |
116f349c | 36 | intel_pt_enable_logging = true; |
53af9284 AH |
37 | } |
38 | ||
39 | void intel_pt_log_disable(void) | |
40 | { | |
41 | if (f) | |
42 | fflush(f); | |
116f349c | 43 | intel_pt_enable_logging = false; |
53af9284 AH |
44 | } |
45 | ||
46 | void intel_pt_log_set_name(const char *name) | |
47 | { | |
48 | strncpy(log_name, name, MAX_LOG_NAME - 5); | |
49 | strcat(log_name, ".log"); | |
50 | } | |
51 | ||
52 | static void intel_pt_print_data(const unsigned char *buf, int len, uint64_t pos, | |
53 | int indent) | |
54 | { | |
55 | int i; | |
56 | ||
57 | for (i = 0; i < indent; i++) | |
58 | fprintf(f, " "); | |
59 | ||
60 | fprintf(f, " %08" PRIx64 ": ", pos); | |
61 | for (i = 0; i < len; i++) | |
62 | fprintf(f, " %02x", buf[i]); | |
63 | for (; i < 16; i++) | |
64 | fprintf(f, " "); | |
65 | fprintf(f, " "); | |
66 | } | |
67 | ||
68 | static void intel_pt_print_no_data(uint64_t pos, int indent) | |
69 | { | |
70 | int i; | |
71 | ||
72 | for (i = 0; i < indent; i++) | |
73 | fprintf(f, " "); | |
74 | ||
75 | fprintf(f, " %08" PRIx64 ": ", pos); | |
76 | for (i = 0; i < 16; i++) | |
77 | fprintf(f, " "); | |
78 | fprintf(f, " "); | |
79 | } | |
80 | ||
81 | static int intel_pt_log_open(void) | |
82 | { | |
116f349c | 83 | if (!intel_pt_enable_logging) |
53af9284 AH |
84 | return -1; |
85 | ||
86 | if (f) | |
87 | return 0; | |
88 | ||
89 | if (!log_name[0]) | |
90 | return -1; | |
91 | ||
92 | f = fopen(log_name, "w+"); | |
93 | if (!f) { | |
116f349c | 94 | intel_pt_enable_logging = false; |
53af9284 AH |
95 | return -1; |
96 | } | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
116f349c AH |
101 | void __intel_pt_log_packet(const struct intel_pt_pkt *packet, int pkt_len, |
102 | uint64_t pos, const unsigned char *buf) | |
53af9284 AH |
103 | { |
104 | char desc[INTEL_PT_PKT_DESC_MAX]; | |
105 | ||
106 | if (intel_pt_log_open()) | |
107 | return; | |
108 | ||
109 | intel_pt_print_data(buf, pkt_len, pos, 0); | |
110 | intel_pt_pkt_desc(packet, desc, INTEL_PT_PKT_DESC_MAX); | |
111 | fprintf(f, "%s\n", desc); | |
112 | } | |
113 | ||
116f349c | 114 | void __intel_pt_log_insn(struct intel_pt_insn *intel_pt_insn, uint64_t ip) |
53af9284 AH |
115 | { |
116 | char desc[INTEL_PT_INSN_DESC_MAX]; | |
117 | size_t len = intel_pt_insn->length; | |
118 | ||
119 | if (intel_pt_log_open()) | |
120 | return; | |
121 | ||
32f98aab AH |
122 | if (len > INTEL_PT_INSN_BUF_SZ) |
123 | len = INTEL_PT_INSN_BUF_SZ; | |
53af9284 AH |
124 | intel_pt_print_data(intel_pt_insn->buf, len, ip, 8); |
125 | if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0) | |
126 | fprintf(f, "%s\n", desc); | |
127 | else | |
128 | fprintf(f, "Bad instruction!\n"); | |
129 | } | |
130 | ||
116f349c AH |
131 | void __intel_pt_log_insn_no_data(struct intel_pt_insn *intel_pt_insn, |
132 | uint64_t ip) | |
53af9284 AH |
133 | { |
134 | char desc[INTEL_PT_INSN_DESC_MAX]; | |
135 | ||
136 | if (intel_pt_log_open()) | |
137 | return; | |
138 | ||
139 | intel_pt_print_no_data(ip, 8); | |
140 | if (intel_pt_insn_desc(intel_pt_insn, desc, INTEL_PT_INSN_DESC_MAX) > 0) | |
141 | fprintf(f, "%s\n", desc); | |
142 | else | |
143 | fprintf(f, "Bad instruction!\n"); | |
144 | } | |
145 | ||
116f349c | 146 | void __intel_pt_log(const char *fmt, ...) |
53af9284 AH |
147 | { |
148 | va_list args; | |
149 | ||
150 | if (intel_pt_log_open()) | |
151 | return; | |
152 | ||
153 | va_start(args, fmt); | |
154 | vfprintf(f, fmt, args); | |
155 | va_end(args); | |
156 | } |