/******************************************************************************
 *
 * Module Name: extrace - Support for interpreter execution tracing
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2019, Intel Corp.
 * All rights reserved.
 *
 * 2. License
 *
 * 2.1. This is your license from Intel Corp. under its intellectual property
 * rights. You may have additional license terms from the party that provided
 * you this software, covering your right to use that party's intellectual
 * property rights.
 *
 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
 * copy of the source code appearing in this file ("Covered Code") an
 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
 * base code distributed originally by Intel ("Original Intel Code") to copy,
 * make derivatives, distribute, use and display any portion of the Covered
 * Code in any form, with the right to sublicense such rights; and
 *
 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
 * license (with the right to sublicense), under only those claims of Intel
 * patents that are infringed by the Original Intel Code, to make, use, sell,
 * offer to sell, and import the Covered Code and derivative works thereof
 * solely to the minimum extent necessary to exercise the above copyright
 * license, and in no event shall the patent license extend to any additions
 * to or modifications of the Original Intel Code. No other license or right
 * is granted directly or by implication, estoppel or otherwise;
 *
 * The above copyright and patent license is granted only if the following
 * conditions are met:
 *
 * 3. Conditions
 *
 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification with rights to further distribute source must include
 * the above Copyright Notice, the above License, this list of Conditions,
 * and the following Disclaimer and Export Compliance provision. In addition,
 * Licensee must cause all Covered Code to which Licensee contributes to
 * contain a file documenting the changes Licensee made to create that Covered
 * Code and the date of any change. Licensee must include in that file the
 * documentation of any changes made by any predecessor Licensee. Licensee
 * must include a prominent statement that the modification is derived,
 * directly or indirectly, from Original Intel Code.
 *
 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
 * Redistribution of source code of any substantial portion of the Covered
 * Code or modification without rights to further distribute source must
 * include the following Disclaimer and Export Compliance provision in the
 * documentation and/or other materials provided with distribution. In
 * addition, Licensee may not authorize further sublicense of source of any
 * portion of the Covered Code, and must include terms to the effect that the
 * license from Licensee to its licensee is limited to the intellectual
 * property embodied in the software Licensee provides to its licensee, and
 * not to intellectual property embodied in modifications its licensee may
 * make.
 *
 * 3.3. Redistribution of Executable. Redistribution in executable form of any
 * substantial portion of the Covered Code or modification must reproduce the
 * above Copyright Notice, and the following Disclaimer and Export Compliance
 * provision in the documentation and/or other materials provided with the
 * distribution.
 *
 * 3.4. Intel retains all right, title, and interest in and to the Original
 * Intel Code.
 *
 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
 * Intel shall be used in advertising or otherwise to promote the sale, use or
 * other dealings in products derived from or relating to the Covered Code
 * without prior written authorization from Intel.
 *
 * 4. Disclaimer and Export Compliance
 *
 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
 * PARTICULAR PURPOSE.
 *
 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
 * LIMITED REMEDY.
 *
 * 4.3. Licensee shall not export, either directly or indirectly, any of this
 * software or system incorporating such software without first obtaining any
 * required license or other approval from the U. S. Department of Commerce or
 * any other agency or department of the United States Government. In the
 * event Licensee exports any such software from the United States or
 * re-exports any such software from a foreign destination, Licensee shall
 * ensure that the distribution and export/re-export of the software is in
 * compliance with all laws, regulations, orders, or other restrictions of the
 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 * any of its subsidiaries will export/re-export any technical data, process,
 * software, or service, directly or indirectly, to any country for which the
 * United States government or any agency thereof requires an export license,
 * other governmental approval, or letter of assurance, without first obtaining
 * such license, approval or letter.
 *
 *****************************************************************************
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * following license:
 *
 * 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.
 *
 * 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 MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * 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 DAMAGE.
 *
 * Alternatively, you may choose to be licensed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 *****************************************************************************/

#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"


#define _COMPONENT          ACPI_EXECUTER
        ACPI_MODULE_NAME    ("extrace")


static ACPI_OPERAND_OBJECT  *AcpiGbl_TraceMethodObject = NULL;

/* Local prototypes */

#ifdef ACPI_DEBUG_OUTPUT
static const char *
AcpiExGetTraceEventName (
    ACPI_TRACE_EVENT_TYPE   Type);
#endif


/*******************************************************************************
 *
 * FUNCTION:    AcpiExInterpreterTraceEnabled
 *
 * 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 BOOLEAN
AcpiExInterpreterTraceEnabled (
    char                    *Name)
{

    /* Check if tracing is enabled */

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

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

    if (Name &&
        (AcpiGbl_TraceMethodName &&
         strcmp (AcpiGbl_TraceMethodName, Name)))
    {
        return (FALSE);
    }

    if ((AcpiGbl_TraceFlags & ACPI_TRACE_ONESHOT) &&
        !AcpiGbl_TraceMethodName)
    {
        return (FALSE);
    }

    return (TRUE);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExGetTraceEventName
 *
 * 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 *
AcpiExGetTraceEventName (
    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:    AcpiExTracePoint
 *
 * 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
AcpiExTracePoint (
    ACPI_TRACE_EVENT_TYPE   Type,
    BOOLEAN                 Begin,
    UINT8                   *Aml,
    char                    *Pathname)
{

    ACPI_FUNCTION_NAME (ExTracePoint);


    if (Pathname)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_TRACE_POINT,
            "%s %s [0x%p:%s] execution.\n",
            AcpiExGetTraceEventName (Type), Begin ? "Begin" : "End",
            Aml, Pathname));
    }
    else
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_TRACE_POINT,
            "%s %s [0x%p] execution.\n",
            AcpiExGetTraceEventName (Type), Begin ? "Begin" : "End",
            Aml));
    }
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExStartTraceMethod
 *
 * PARAMETERS:  MethodNode          - Node of the method
 *              ObjDesc             - The method object
 *              WalkState           - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Start control method execution trace
 *
 ******************************************************************************/

void
AcpiExStartTraceMethod (
    ACPI_NAMESPACE_NODE     *MethodNode,
    ACPI_OPERAND_OBJECT     *ObjDesc,
    ACPI_WALK_STATE         *WalkState)
{
    char                    *Pathname = NULL;
    BOOLEAN                 Enabled = FALSE;


    ACPI_FUNCTION_NAME (ExStartTraceMethod);


    if (MethodNode)
    {
        Pathname = AcpiNsGetNormalizedPathname (MethodNode, TRUE);
    }

    Enabled = AcpiExInterpreterTraceEnabled (Pathname);
    if (Enabled && !AcpiGbl_TraceMethodObject)
    {
        AcpiGbl_TraceMethodObject = ObjDesc;
        AcpiGbl_OriginalDbgLevel = AcpiDbgLevel;
        AcpiGbl_OriginalDbgLayer = AcpiDbgLayer;
        AcpiDbgLevel = ACPI_TRACE_LEVEL_ALL;
        AcpiDbgLayer = ACPI_TRACE_LAYER_ALL;

        if (AcpiGbl_TraceDbgLevel)
        {
            AcpiDbgLevel = AcpiGbl_TraceDbgLevel;
        }

        if (AcpiGbl_TraceDbgLayer)
        {
            AcpiDbgLayer = AcpiGbl_TraceDbgLayer;
        }
    }

    if (Enabled)
    {
        ACPI_TRACE_POINT (ACPI_TRACE_AML_METHOD, TRUE,
            ObjDesc ? ObjDesc->Method.AmlStart : NULL, Pathname);
    }

    if (Pathname)
    {
        ACPI_FREE (Pathname);
    }
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiExStopTraceMethod
 *
 * PARAMETERS:  MethodNode          - Node of the method
 *              ObjDesc             - The method object
 *              WalkState           - current state, NULL if not yet executing
 *                                    a method.
 *
 * RETURN:      None
 *
 * DESCRIPTION: Stop control method execution trace
 *
 ******************************************************************************/

void
AcpiExStopTraceMethod (
    ACPI_NAMESPACE_NODE     *MethodNode,
    ACPI_OPERAND_OBJECT     *ObjDesc,
    ACPI_WALK_STATE         *WalkState)
{
    char                    *Pathname = NULL;
    BOOLEAN                 Enabled;


    ACPI_FUNCTION_NAME (ExStopTraceMethod);


    if (MethodNode)
    {
        Pathname = AcpiNsGetNormalizedPathname (MethodNode, TRUE);
    }

    Enabled = AcpiExInterpreterTraceEnabled (NULL);

    if (Enabled)
    {
        ACPI_TRACE_POINT (ACPI_TRACE_AML_METHOD, FALSE,
            ObjDesc ? ObjDesc->Method.AmlStart : NULL, Pathname);
    }

    /* Check whether the tracer should be stopped */

    if (AcpiGbl_TraceMethodObject == ObjDesc)
    {
        /* Disable further tracing if type is one-shot */

        if (AcpiGbl_TraceFlags & ACPI_TRACE_ONESHOT)
        {
            AcpiGbl_TraceMethodName = NULL;
        }

        AcpiDbgLevel = AcpiGbl_OriginalDbgLevel;
        AcpiDbgLayer = AcpiGbl_OriginalDbgLayer;
        AcpiGbl_TraceMethodObject = NULL;
    }

    if (Pathname)
    {
        ACPI_FREE (Pathname);
    }
}


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

void
AcpiExStartTraceOpcode (
    ACPI_PARSE_OBJECT       *Op,
    ACPI_WALK_STATE         *WalkState)
{

    ACPI_FUNCTION_NAME (ExStartTraceOpcode);


    if (AcpiExInterpreterTraceEnabled (NULL) &&
        (AcpiGbl_TraceFlags & ACPI_TRACE_OPCODE))
    {
        ACPI_TRACE_POINT (ACPI_TRACE_AML_OPCODE, TRUE,
            Op->Common.Aml, Op->Common.AmlOpName);
    }
}


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

void
AcpiExStopTraceOpcode (
    ACPI_PARSE_OBJECT       *Op,
    ACPI_WALK_STATE         *WalkState)
{

    ACPI_FUNCTION_NAME (ExStopTraceOpcode);


    if (AcpiExInterpreterTraceEnabled (NULL) &&
        (AcpiGbl_TraceFlags & ACPI_TRACE_OPCODE))
    {
        ACPI_TRACE_POINT (ACPI_TRACE_AML_OPCODE, FALSE,
            Op->Common.Aml, Op->Common.AmlOpName);
    }
}
