vfs: check userland buffers before reading them.

[haiku.git] / src / add-ons / kernel / bus_managers / acpi / acpica / components / dispatcher / dsdebug.c

/******************************************************************************
 *
 * Module Name: dsdebug - Parser/Interpreter interface - debugging
 *
 *****************************************************************************/

/******************************************************************************
 *
 * 1. Copyright Notice
 *
 * Some or all of this work - Copyright (c) 1999 - 2017, 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 "acdispat.h"
#include "acnamesp.h"
#include "acdisasm.h"
#include "acinterp.h"


#define _COMPONENT          ACPI_DISPATCHER
        ACPI_MODULE_NAME    ("dsdebug")


#if defined(ACPI_DEBUG_OUTPUT) || defined(ACPI_DEBUGGER)

/* Local prototypes */

static void
AcpiDsPrintNodePathname (
    ACPI_NAMESPACE_NODE     *Node,
    const char              *Message);


/*******************************************************************************
 *
 * FUNCTION:    AcpiDsPrintNodePathname
 *
 * PARAMETERS:  Node            - Object
 *              Message         - Prefix message
 *
 * DESCRIPTION: Print an object's full namespace pathname
 *              Manages allocation/freeing of a pathname buffer
 *
 ******************************************************************************/

static void
AcpiDsPrintNodePathname (
    ACPI_NAMESPACE_NODE     *Node,
    const char              *Message)
{
    ACPI_BUFFER             Buffer;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (DsPrintNodePathname);

    if (!Node)
    {
        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH, "[NULL NAME]"));
        return_VOID;
    }

    /* Convert handle to full pathname and print it (with supplied message) */

    Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;

    Status = AcpiNsHandleToPathname (Node, &Buffer, TRUE);
    if (ACPI_SUCCESS (Status))
    {
        if (Message)
        {
            ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH, "%s ", Message));
        }

        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH, "[%s] (Node %p)",
            (char *) Buffer.Pointer, Node));
        ACPI_FREE (Buffer.Pointer);
    }

    return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiDsDumpMethodStack
 *
 * PARAMETERS:  Status          - Method execution status
 *              WalkState       - Current state of the parse tree walk
 *              Op              - Executing parse op
 *
 * RETURN:      None
 *
 * DESCRIPTION: Called when a method has been aborted because of an error.
 *              Dumps the method execution stack.
 *
 ******************************************************************************/

void
AcpiDsDumpMethodStack (
    ACPI_STATUS             Status,
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op)
{
    ACPI_PARSE_OBJECT       *Next;
    ACPI_THREAD_STATE       *Thread;
    ACPI_WALK_STATE         *NextWalkState;
    ACPI_NAMESPACE_NODE     *PreviousMethod = NULL;
    ACPI_OPERAND_OBJECT     *MethodDesc;


    ACPI_FUNCTION_TRACE (DsDumpMethodStack);

    /* Ignore control codes, they are not errors */

    if ((Status & AE_CODE_MASK) == AE_CODE_CONTROL)
    {
        return_VOID;
    }

    /* We may be executing a deferred opcode */

    if (WalkState->DeferredNode)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
            "Executing subtree for Buffer/Package/Region\n"));
        return_VOID;
    }

    /*
     * If there is no Thread, we are not actually executing a method.
     * This can happen when the iASL compiler calls the interpreter
     * to perform constant folding.
     */
    Thread = WalkState->Thread;
    if (!Thread)
    {
        return_VOID;
    }

    /* Display exception and method name */

    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
        "\n**** Exception %s during execution of method ",
        AcpiFormatException (Status)));

    AcpiDsPrintNodePathname (WalkState->MethodNode, NULL);

    /* Display stack of executing methods */

    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH,
        "\n\nMethod Execution Stack:\n"));
    NextWalkState = Thread->WalkStateList;

    /* Walk list of linked walk states */

    while (NextWalkState)
    {
        MethodDesc = NextWalkState->MethodDesc;
        if (MethodDesc)
        {
            AcpiExStopTraceMethod (
                (ACPI_NAMESPACE_NODE *) MethodDesc->Method.Node,
                MethodDesc, WalkState);
        }

        ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
            "    Method [%4.4s] executing: ",
            AcpiUtGetNodeName (NextWalkState->MethodNode)));

        /* First method is the currently executing method */

        if (NextWalkState == WalkState)
        {
            if (Op)
            {
                /* Display currently executing ASL statement */

                Next = Op->Common.Next;
                Op->Common.Next = NULL;

#ifdef ACPI_DISASSEMBLER
                AcpiDmDisassemble (NextWalkState, Op, ACPI_UINT32_MAX);
#endif
                Op->Common.Next = Next;
            }
        }
        else
        {
            /*
             * This method has called another method
             * NOTE: the method call parse subtree is already deleted at
             * this point, so we cannot disassemble the method invocation.
             */
            ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH, "Call to method "));
            AcpiDsPrintNodePathname (PreviousMethod, NULL);
        }

        PreviousMethod = NextWalkState->MethodNode;
        NextWalkState = NextWalkState->Next;
        ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DISPATCH, "\n"));
    }

    return_VOID;
}

#else

void
AcpiDsDumpMethodStack (
    ACPI_STATUS             Status,
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op)
{
    return;
}

#endif