mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
ef4af870be
Early in kernel boot pointers can't be used and so %p shows up
incorrectly:
```
extrace-0138 ex_trace_point : Method Begin [0x(____ptrval____):\M460] execution.
```
Later in the boot %p works, but it's not really actually useful when
the pathname can resolve properly.
Adjust the debug print so that if the Pathname resolves that the pointer
isn't also printed:
```
extrace-0138 ex_trace_point : Method Begin [\M460] execution.
```
Link: https://github.com/acpica/acpica/pull/1013
Link: bdc2a4e646
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20250609032839.525087-1-superm1@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
369 lines
9.6 KiB
C
369 lines
9.6 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: extrace - Support for interpreter execution tracing
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*
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* Copyright (C) 2000 - 2025, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EXECUTER
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ACPI_MODULE_NAME("extrace")
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static union acpi_operand_object *acpi_gbl_trace_method_object = NULL;
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/* Local prototypes */
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#ifdef ACPI_DEBUG_OUTPUT
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static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type);
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_interpreter_trace_enabled
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*
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* PARAMETERS: name - Whether method name should be matched,
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* this should be checked before starting
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* the tracer
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*
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* RETURN: TRUE if interpreter trace is enabled.
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*
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* DESCRIPTION: Check whether interpreter trace is enabled
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*
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******************************************************************************/
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static u8 acpi_ex_interpreter_trace_enabled(char *name)
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{
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/* Check if tracing is enabled */
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if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) {
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return (FALSE);
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}
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/*
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* Check if tracing is filtered:
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*
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* 1. If the tracer is started, acpi_gbl_trace_method_object should have
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* been filled by the trace starter
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* 2. If the tracer is not started, acpi_gbl_trace_method_name should be
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* matched if it is specified
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* 3. If the tracer is oneshot style, acpi_gbl_trace_method_name should
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* not be cleared by the trace stopper during the first match
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*/
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if (acpi_gbl_trace_method_object) {
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return (TRUE);
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}
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if (name &&
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(acpi_gbl_trace_method_name &&
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strcmp(acpi_gbl_trace_method_name, name))) {
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return (FALSE);
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}
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if ((acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) &&
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!acpi_gbl_trace_method_name) {
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return (FALSE);
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}
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return (TRUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_get_trace_event_name
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*
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* PARAMETERS: type - Trace event type
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*
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* RETURN: Trace event name.
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*
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* DESCRIPTION: Used to obtain the full trace event name.
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*
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******************************************************************************/
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#ifdef ACPI_DEBUG_OUTPUT
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static const char *acpi_ex_get_trace_event_name(acpi_trace_event_type type)
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{
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switch (type) {
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case ACPI_TRACE_AML_METHOD:
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return "Method";
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case ACPI_TRACE_AML_OPCODE:
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return "Opcode";
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case ACPI_TRACE_AML_REGION:
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return "Region";
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default:
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return "";
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}
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}
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#endif
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_trace_point
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*
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* PARAMETERS: type - Trace event type
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* begin - TRUE if before execution
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* aml - Executed AML address
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* pathname - Object path
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*
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* RETURN: None
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*
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* DESCRIPTION: Internal interpreter execution trace.
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*
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******************************************************************************/
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void
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acpi_ex_trace_point(acpi_trace_event_type type,
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u8 begin, u8 *aml, char *pathname)
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{
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ACPI_FUNCTION_NAME(ex_trace_point);
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if (pathname) {
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ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
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"%s %s [%s] execution.\n",
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acpi_ex_get_trace_event_name(type),
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begin ? "Begin" : "End", pathname));
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT,
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"%s %s [0x%p] execution.\n",
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acpi_ex_get_trace_event_name(type),
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begin ? "Begin" : "End", aml));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_trace_args
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*
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* PARAMETERS: params - AML method arguments
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* count - numer of method arguments
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*
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* RETURN: None
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*
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* DESCRIPTION: Trace any arguments
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*
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******************************************************************************/
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void
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acpi_ex_trace_args(union acpi_operand_object **params, u32 count)
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{
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u32 i;
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ACPI_FUNCTION_NAME(ex_trace_args);
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for (i = 0; i < count; i++) {
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union acpi_operand_object *obj_desc = params[i];
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if (!i) {
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ACPI_DEBUG_PRINT((ACPI_DB_TRACE_POINT, " "));
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}
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switch (obj_desc->common.type) {
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case ACPI_TYPE_INTEGER:
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_TRACE_POINT, "%llx", obj_desc->integer.value));
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break;
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case ACPI_TYPE_STRING:
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if (!obj_desc->string.length) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_TRACE_POINT, "NULL"));
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continue;
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}
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if (ACPI_IS_DEBUG_ENABLED(ACPI_LV_TRACE_POINT, _COMPONENT))
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acpi_ut_print_string(obj_desc->string.pointer, ACPI_UINT8_MAX);
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break;
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default:
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_TRACE_POINT, "Unknown"));
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break;
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}
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if (i+1 == count) {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_TRACE_POINT, "\n"));
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} else {
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_TRACE_POINT, ", "));
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_start_trace_method
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*
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* PARAMETERS: method_node - Node of the method
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* obj_desc - The method object
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* walk_state - current state, NULL if not yet executing
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* a method.
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*
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* RETURN: None
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*
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* DESCRIPTION: Start control method execution trace
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*
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******************************************************************************/
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void
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acpi_ex_start_trace_method(struct acpi_namespace_node *method_node,
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union acpi_operand_object *obj_desc,
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struct acpi_walk_state *walk_state)
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{
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char *pathname = NULL;
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u8 enabled = FALSE;
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ACPI_FUNCTION_NAME(ex_start_trace_method);
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if (method_node) {
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pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
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}
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enabled = acpi_ex_interpreter_trace_enabled(pathname);
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if (enabled && !acpi_gbl_trace_method_object) {
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acpi_gbl_trace_method_object = obj_desc;
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acpi_gbl_original_dbg_level = acpi_dbg_level;
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acpi_gbl_original_dbg_layer = acpi_dbg_layer;
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acpi_dbg_level = ACPI_TRACE_LEVEL_ALL;
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acpi_dbg_layer = ACPI_TRACE_LAYER_ALL;
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if (acpi_gbl_trace_dbg_level) {
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acpi_dbg_level = acpi_gbl_trace_dbg_level;
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}
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if (acpi_gbl_trace_dbg_layer) {
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acpi_dbg_layer = acpi_gbl_trace_dbg_layer;
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}
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}
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if (enabled) {
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ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, TRUE,
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obj_desc ? obj_desc->method.aml_start : NULL,
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pathname);
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}
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if (pathname) {
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ACPI_FREE(pathname);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_stop_trace_method
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*
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* PARAMETERS: method_node - Node of the method
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* obj_desc - The method object
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* walk_state - current state, NULL if not yet executing
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* a method.
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*
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* RETURN: None
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*
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* DESCRIPTION: Stop control method execution trace
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*
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******************************************************************************/
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void
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acpi_ex_stop_trace_method(struct acpi_namespace_node *method_node,
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union acpi_operand_object *obj_desc,
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struct acpi_walk_state *walk_state)
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{
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char *pathname = NULL;
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u8 enabled;
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ACPI_FUNCTION_NAME(ex_stop_trace_method);
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if (method_node) {
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pathname = acpi_ns_get_normalized_pathname(method_node, TRUE);
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}
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enabled = acpi_ex_interpreter_trace_enabled(NULL);
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if (enabled) {
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ACPI_TRACE_POINT(ACPI_TRACE_AML_METHOD, FALSE,
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obj_desc ? obj_desc->method.aml_start : NULL,
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pathname);
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}
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/* Check whether the tracer should be stopped */
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if (acpi_gbl_trace_method_object == obj_desc) {
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/* Disable further tracing if type is one-shot */
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if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) {
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acpi_gbl_trace_method_name = NULL;
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}
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acpi_dbg_level = acpi_gbl_original_dbg_level;
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acpi_dbg_layer = acpi_gbl_original_dbg_layer;
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acpi_gbl_trace_method_object = NULL;
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}
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if (pathname) {
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ACPI_FREE(pathname);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_start_trace_opcode
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*
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* PARAMETERS: op - The parser opcode object
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* walk_state - current state, NULL if not yet executing
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* a method.
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*
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* RETURN: None
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*
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* DESCRIPTION: Start opcode execution trace
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*
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******************************************************************************/
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void
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acpi_ex_start_trace_opcode(union acpi_parse_object *op,
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struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_NAME(ex_start_trace_opcode);
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if (acpi_ex_interpreter_trace_enabled(NULL) &&
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(acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
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ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, TRUE,
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op->common.aml, op->common.aml_op_name);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ex_stop_trace_opcode
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*
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* PARAMETERS: op - The parser opcode object
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* walk_state - current state, NULL if not yet executing
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* a method.
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*
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* RETURN: None
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*
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* DESCRIPTION: Stop opcode execution trace
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*
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******************************************************************************/
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void
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acpi_ex_stop_trace_opcode(union acpi_parse_object *op,
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struct acpi_walk_state *walk_state)
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{
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ACPI_FUNCTION_NAME(ex_stop_trace_opcode);
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if (acpi_ex_interpreter_trace_enabled(NULL) &&
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(acpi_gbl_trace_flags & ACPI_TRACE_OPCODE)) {
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ACPI_TRACE_POINT(ACPI_TRACE_AML_OPCODE, FALSE,
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op->common.aml, op->common.aml_op_name);
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}
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}
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