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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2/******************************************************************************
3 *
4 * Module Name: extrace - Support for interpreter execution tracing
5 *
6 * Copyright (C) 2000 - 2020, Intel Corp.
7 *
8 *****************************************************************************/
9
10#include <acpi/acpi.h>
11#include "accommon.h"
12#include "acnamesp.h"
13#include "acinterp.h"
14
15#define _COMPONENT ACPI_EXECUTER
16ACPI_MODULE_NAME("extrace")
17
18static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;
19
20/* Local prototypes */
21
22#ifdef ACPI_DEBUG_OUTPUT
23static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type);
24#endif
25
26/*******************************************************************************
27 *
28 * FUNCTION: acpi_ex_interpreter_trace_enabled
29 *
30 * PARAMETERS: name - Whether method name should be matched,
31 * this should be checked before starting
32 * the tracer
33 *
34 * RETURN: TRUE if interpreter trace is enabled.
35 *
36 * DESCRIPTION: Check whether interpreter trace is enabled
37 *
38 ******************************************************************************/
39
40static u8 acpi_ex_interpreter_trace_enabled(char *name)
41{
42
43 /* Check if tracing is enabled */
44
45 if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
46 return (FALSE);
47 }
48
49 /*
50 * Check if tracing is filtered:
51 *
52 * 1. If the tracer is started, acpi_gbl_trace_method_object should have
53 * been filled by the trace starter
54 * 2. If the tracer is not started, acpi_gbl_trace_method_name should be
55 * matched if it is specified
56 * 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
57 * not be cleared by the trace stopper during the first match
58 */
59 if (acpi_gbl_trace_method_object) {
60 return (TRUE);
61 }
62
63 if (name &&
64 (acpi_gbl_trace_method_name &&
65 strcmp(acpi_gbl_trace_method_name, name))) {
66 return (FALSE);
67 }
68
69 if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
70 !acpi_gbl_trace_method_name) {
71 return (FALSE);
72 }
73
74 return (TRUE);
75}
76
77/*******************************************************************************
78 *
79 * FUNCTION: acpi_ex_get_trace_event_name
80 *
81 * PARAMETERS: type - Trace event type
82 *
83 * RETURN: Trace event name.
84 *
85 * DESCRIPTION: Used to obtain the full trace event name.
86 *
87 ******************************************************************************/
88
89#ifdef ACPI_DEBUG_OUTPUT
90
91static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type)
92{
93
94 switch (type) {
95 case ACPI_TRACE_AML_METHOD:
96
97 return "Method";
98
99 case ACPI_TRACE_AML_OPCODE:
100
101 return "Opcode";
102
103 case ACPI_TRACE_AML_REGION:
104
105 return "Region";
106
107 default:
108
109 return "";
110 }
111}
112
113#endif
114
115/*******************************************************************************
116 *
117 * FUNCTION: acpi_ex_trace_point
118 *
119 * PARAMETERS: type - Trace event type
120 * begin - TRUE if before execution
121 * aml - Executed AML address
122 * pathname - Object path
123 *
124 * RETURN: None
125 *
126 * DESCRIPTION: Internal interpreter execution trace.
127 *
128 ******************************************************************************/
129
130void
131acpi_ex_trace_point(acpi_trace_event_type type,
132 u8 begin, u8 *aml, char *pathname)
133{
134
135 ACPI_FUNCTION_NAME(ex_trace_point);
136
137 if (pathname) {
138 ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
139 "%s %s [0x%p:%s] execution.\n",
140 acpi_ex_get_trace_event_name(type),
141 begin ? "Begin" : "End", aml, pathname));
142 } else {
143 ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
144 "%s %s [0x%p] execution.\n",
145 acpi_ex_get_trace_event_name(type),
146 begin ? "Begin" : "End", aml));
147 }
148}
149
150/*******************************************************************************
151 *
152 * FUNCTION: acpi_ex_start_trace_method
153 *
154 * PARAMETERS: method_node - Node of the method
155 * obj_desc - The method object
156 * walk_state - current state, NULL if not yet executing
157 * a method.
158 *
159 * RETURN: None
160 *
161 * DESCRIPTION: Start control method execution trace
162 *
163 ******************************************************************************/
164
165void
166acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
167 union acpi_operand_object *obj_desc,
168 struct acpi_walk_state *walk_state)
169{
170 char *pathname = NULL;
171 u8 enabled = FALSE;
172
173 ACPI_FUNCTION_NAME(ex_start_trace_method);
174
175 if (method_node) {
176 pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
177 }
178
179 enabled = acpi_ex_interpreter_trace_enabled(pathname);
180 if (enabled && !acpi_gbl_trace_method_object) {
181 acpi_gbl_trace_method_object = obj_desc;
182 acpi_gbl_original_dbg_level = acpi_dbg_level;
183 acpi_gbl_original_dbg_layer = acpi_dbg_layer;
184 acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
185 acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;
186
187 if (acpi_gbl_trace_dbg_level) {
188 acpi_dbg_level = acpi_gbl_trace_dbg_level;
189 }
190
191 if (acpi_gbl_trace_dbg_layer) {
192 acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
193 }
194 }
195
196 if (enabled) {
197 ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, TRUE,
198 obj_desc ? obj_desc->method.aml_start : NULL,
199 pathname);
200 }
201
202 if (pathname) {
203 ACPI_FREE(pathname);
204 }
205}
206
207/*******************************************************************************
208 *
209 * FUNCTION: acpi_ex_stop_trace_method
210 *
211 * PARAMETERS: method_node - Node of the method
212 * obj_desc - The method object
213 * walk_state - current state, NULL if not yet executing
214 * a method.
215 *
216 * RETURN: None
217 *
218 * DESCRIPTION: Stop control method execution trace
219 *
220 ******************************************************************************/
221
222void
223acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
224 union acpi_operand_object *obj_desc,
225 struct acpi_walk_state *walk_state)
226{
227 char *pathname = NULL;
228 u8 enabled;
229
230 ACPI_FUNCTION_NAME(ex_stop_trace_method);
231
232 if (method_node) {
233 pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
234 }
235
236 enabled = acpi_ex_interpreter_trace_enabled(NULL);
237
238 if (enabled) {
239 ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, FALSE,
240 obj_desc ? obj_desc->method.aml_start : NULL,
241 pathname);
242 }
243
244 /* Check whether the tracer should be stopped */
245
246 if (acpi_gbl_trace_method_object == obj_desc) {
247
248 /* Disable further tracing if type is one-shot */
249
250 if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
251 acpi_gbl_trace_method_name = NULL;
252 }
253
254 acpi_dbg_level = acpi_gbl_original_dbg_level;
255 acpi_dbg_layer = acpi_gbl_original_dbg_layer;
256 acpi_gbl_trace_method_object = NULL;
257 }
258
259 if (pathname) {
260 ACPI_FREE(pathname);
261 }
262}
263
264/*******************************************************************************
265 *
266 * FUNCTION: acpi_ex_start_trace_opcode
267 *
268 * PARAMETERS: op - The parser opcode object
269 * walk_state - current state, NULL if not yet executing
270 * a method.
271 *
272 * RETURN: None
273 *
274 * DESCRIPTION: Start opcode execution trace
275 *
276 ******************************************************************************/
277
278void
279acpi_ex_start_trace_opcode(union acpi_parse_object *op,
280 struct acpi_walk_state *walk_state)
281{
282
283 ACPI_FUNCTION_NAME(ex_start_trace_opcode);
284
285 if (acpi_ex_interpreter_trace_enabled(NULL) &&
286 (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
287 ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, TRUE,
288 op->common.aml, op->common.aml_op_name);
289 }
290}
291
292/*******************************************************************************
293 *
294 * FUNCTION: acpi_ex_stop_trace_opcode
295 *
296 * PARAMETERS: op - The parser opcode object
297 * walk_state - current state, NULL if not yet executing
298 * a method.
299 *
300 * RETURN: None
301 *
302 * DESCRIPTION: Stop opcode execution trace
303 *
304 ******************************************************************************/
305
306void
307acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
308 struct acpi_walk_state *walk_state)
309{
310
311 ACPI_FUNCTION_NAME(ex_stop_trace_opcode);
312
313 if (acpi_ex_interpreter_trace_enabled(NULL) &&
314 (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
315 ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, FALSE,
316 op->common.aml, op->common.aml_op_name);
317 }
318}