summaryrefslogtreecommitdiff
path: root/drivers/acpi/acpica/extrace.c
blob: 9a67d507a132f190d0ee998d345a6989548ede22 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/******************************************************************************
 *
 * Module Name: extrace - Support for interpreter execution tracing
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2018, Intel Corp.
 * All rights reserved.
 *
 * 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,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"

#define _COMPONENT          ACPI_EXECUTER
ACPI_MODULE_NAME("extrace")

static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;

/* Local prototypes */

#ifdef ACPI_DEBUG_OUTPUT
static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type);
#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_interpreter_trace_enabled
 *
 * PARAMETERS:  name                - Whether method name should be matched,
 *                                    this should be checked before starting
 *                                    the tracer
 *
 * RETURN:      TRUE if interpreter trace is enabled.
 *
 * DESCRIPTION: Check whether interpreter trace is enabled
 *
 ******************************************************************************/

static u8 acpi_ex_interpreter_trace_enabled(char *name)
{

	/* Check if tracing is enabled */

	if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
		return (FALSE);
	}

	/*
	 * Check if tracing is filtered:
	 *
	 * 1. If the tracer is started, acpi_gbl_trace_method_object should have
	 *    been filled by the trace starter
	 * 2. If the tracer is not started, acpi_gbl_trace_method_name should be
	 *    matched if it is specified
	 * 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
	 *    not be cleared by the trace stopper during the first match
	 */
	if (acpi_gbl_trace_method_object) {
		return (TRUE);
	}

	if (name &&
	    (acpi_gbl_trace_method_name &&
	     strcmp(acpi_gbl_trace_method_name, name))) {
		return (FALSE);
	}

	if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
	    !acpi_gbl_trace_method_name) {
		return (FALSE);
	}

	return (TRUE);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_get_trace_event_name
 *
 * PARAMETERS:  type            - Trace event type
 *
 * RETURN:      Trace event name.
 *
 * DESCRIPTION: Used to obtain the full trace event name.
 *
 ******************************************************************************/

#ifdef ACPI_DEBUG_OUTPUT

static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type)
{

	switch (type) {
	case ACPI_TRACE_AML_METHOD:

		return "Method";

	case ACPI_TRACE_AML_OPCODE:

		return "Opcode";

	case ACPI_TRACE_AML_REGION:

		return "Region";

	default:

		return "";
	}
}

#endif

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_trace_point
 *
 * PARAMETERS:  type                - Trace event type
 *              begin               - TRUE if before execution
 *              aml                 - Executed AML address
 *              pathname            - Object path
 *
 * RETURN:      None
 *
 * DESCRIPTION: Internal interpreter execution trace.
 *
 ******************************************************************************/

void
acpi_ex_trace_point(acpi_trace_event_type type,
		    u8 begin, u8 *aml, char *pathname)
{

	ACPI_FUNCTION_NAME(ex_trace_point);

	if (pathname) {
		ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
				  "%s %s [0x%p:%s] execution.\n",
				  acpi_ex_get_trace_event_name(type),
				  begin ? "Begin" : "End", aml, pathname));
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
				  "%s %s [0x%p] execution.\n",
				  acpi_ex_get_trace_event_name(type),
				  begin ? "Begin" : "End", aml));
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_start_trace_method
 *
 * PARAMETERS:  method_node         - Node of the method
 *              obj_desc            - The method object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start control method execution trace
 *
 ******************************************************************************/

void
acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
			   union acpi_operand_object *obj_desc,
			   struct acpi_walk_state *walk_state)
{
	char *pathname = NULL;
	u8 enabled = FALSE;

	ACPI_FUNCTION_NAME(ex_start_trace_method);

	if (method_node) {
		pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
	}

	enabled = acpi_ex_interpreter_trace_enabled(pathname);
	if (enabled && !acpi_gbl_trace_method_object) {
		acpi_gbl_trace_method_object = obj_desc;
		acpi_gbl_original_dbg_level = acpi_dbg_level;
		acpi_gbl_original_dbg_layer = acpi_dbg_layer;
		acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
		acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;

		if (acpi_gbl_trace_dbg_level) {
			acpi_dbg_level = acpi_gbl_trace_dbg_level;
		}

		if (acpi_gbl_trace_dbg_layer) {
			acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
		}
	}

	if (enabled) {
		ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, TRUE,
				 obj_desc ? obj_desc->method.aml_start : NULL,
				 pathname);
	}

	if (pathname) {
		ACPI_FREE(pathname);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_stop_trace_method
 *
 * PARAMETERS:  method_node         - Node of the method
 *              obj_desc            - The method object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop control method execution trace
 *
 ******************************************************************************/

void
acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
			  union acpi_operand_object *obj_desc,
			  struct acpi_walk_state *walk_state)
{
	char *pathname = NULL;
	u8 enabled;

	ACPI_FUNCTION_NAME(ex_stop_trace_method);

	if (method_node) {
		pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
	}

	enabled = acpi_ex_interpreter_trace_enabled(NULL);

	if (enabled) {
		ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, FALSE,
				 obj_desc ? obj_desc->method.aml_start : NULL,
				 pathname);
	}

	/* Check whether the tracer should be stopped */

	if (acpi_gbl_trace_method_object == obj_desc) {

		/* Disable further tracing if type is one-shot */

		if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
			acpi_gbl_trace_method_name = NULL;
		}

		acpi_dbg_level = acpi_gbl_original_dbg_level;
		acpi_dbg_layer = acpi_gbl_original_dbg_layer;
		acpi_gbl_trace_method_object = NULL;
	}

	if (pathname) {
		ACPI_FREE(pathname);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_start_trace_opcode
 *
 * PARAMETERS:  op                  - The parser opcode object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start opcode execution trace
 *
 ******************************************************************************/

void
acpi_ex_start_trace_opcode(union acpi_parse_object *op,
			   struct acpi_walk_state *walk_state)
{

	ACPI_FUNCTION_NAME(ex_start_trace_opcode);

	if (acpi_ex_interpreter_trace_enabled(NULL) &&
	    (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
		ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, TRUE,
				 op->common.aml, op->common.aml_op_name);
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ex_stop_trace_opcode
 *
 * PARAMETERS:  op                  - The parser opcode object
 *              walk_state          - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop opcode execution trace
 *
 ******************************************************************************/

void
acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
			  struct acpi_walk_state *walk_state)
{

	ACPI_FUNCTION_NAME(ex_stop_trace_opcode);

	if (acpi_ex_interpreter_trace_enabled(NULL) &&
	    (acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
		ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, FALSE,
				 op->common.aml, op->common.aml_op_name);
	}
}