240 lines
6.8 KiB
C
240 lines
6.8 KiB
C
/******************************************************************************
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*
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* Module Name: dbhistry - debugger HISTORY command
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2017, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acdebug.h"
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#define _COMPONENT ACPI_CA_DEBUGGER
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ACPI_MODULE_NAME("dbhistry")
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#define HI_NO_HISTORY 0
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#define HI_RECORD_HISTORY 1
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#define HISTORY_SIZE 40
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typedef struct history_info {
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char *command;
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u32 cmd_num;
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} HISTORY_INFO;
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static HISTORY_INFO acpi_gbl_history_buffer[HISTORY_SIZE];
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static u16 acpi_gbl_lo_history = 0;
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static u16 acpi_gbl_num_history = 0;
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static u16 acpi_gbl_next_history_index = 0;
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u32 acpi_gbl_next_cmd_num = 1;
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/*******************************************************************************
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*
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* FUNCTION: acpi_db_add_to_history
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*
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* PARAMETERS: command_line - Command to add
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*
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* RETURN: None
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*
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* DESCRIPTION: Add a command line to the history buffer.
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*
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******************************************************************************/
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void acpi_db_add_to_history(char *command_line)
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{
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u16 cmd_len;
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u16 buffer_len;
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/* Put command into the next available slot */
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cmd_len = (u16)strlen(command_line);
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if (!cmd_len) {
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return;
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}
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if (acpi_gbl_history_buffer[acpi_gbl_next_history_index].command !=
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NULL) {
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buffer_len =
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(u16)
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strlen(acpi_gbl_history_buffer[acpi_gbl_next_history_index].
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command);
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if (cmd_len > buffer_len) {
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acpi_os_free(acpi_gbl_history_buffer
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[acpi_gbl_next_history_index].command);
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acpi_gbl_history_buffer[acpi_gbl_next_history_index].
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command = acpi_os_allocate(cmd_len + 1);
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}
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} else {
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acpi_gbl_history_buffer[acpi_gbl_next_history_index].command =
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acpi_os_allocate(cmd_len + 1);
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}
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strcpy(acpi_gbl_history_buffer[acpi_gbl_next_history_index].command,
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command_line);
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acpi_gbl_history_buffer[acpi_gbl_next_history_index].cmd_num =
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acpi_gbl_next_cmd_num;
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/* Adjust indexes */
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if ((acpi_gbl_num_history == HISTORY_SIZE) &&
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(acpi_gbl_next_history_index == acpi_gbl_lo_history)) {
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acpi_gbl_lo_history++;
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if (acpi_gbl_lo_history >= HISTORY_SIZE) {
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acpi_gbl_lo_history = 0;
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}
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}
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acpi_gbl_next_history_index++;
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if (acpi_gbl_next_history_index >= HISTORY_SIZE) {
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acpi_gbl_next_history_index = 0;
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}
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acpi_gbl_next_cmd_num++;
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if (acpi_gbl_num_history < HISTORY_SIZE) {
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acpi_gbl_num_history++;
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_db_display_history
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Display the contents of the history buffer
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*
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******************************************************************************/
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void acpi_db_display_history(void)
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{
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u32 i;
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u16 history_index;
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history_index = acpi_gbl_lo_history;
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/* Dump entire history buffer */
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for (i = 0; i < acpi_gbl_num_history; i++) {
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if (acpi_gbl_history_buffer[history_index].command) {
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acpi_os_printf("%3ld %s\n",
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acpi_gbl_history_buffer[history_index].
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cmd_num,
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acpi_gbl_history_buffer[history_index].
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command);
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}
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history_index++;
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if (history_index >= HISTORY_SIZE) {
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history_index = 0;
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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_db_get_from_history
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*
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* PARAMETERS: command_num_arg - String containing the number of the
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* command to be retrieved
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*
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* RETURN: Pointer to the retrieved command. Null on error.
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*
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* DESCRIPTION: Get a command from the history buffer
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*
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******************************************************************************/
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char *acpi_db_get_from_history(char *command_num_arg)
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{
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u32 cmd_num;
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if (command_num_arg == NULL) {
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cmd_num = acpi_gbl_next_cmd_num - 1;
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}
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else {
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cmd_num = strtoul(command_num_arg, NULL, 0);
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}
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return (acpi_db_get_history_by_index(cmd_num));
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_db_get_history_by_index
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*
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* PARAMETERS: cmd_num - Index of the desired history entry.
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* Values are 0...(acpi_gbl_next_cmd_num - 1)
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*
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* RETURN: Pointer to the retrieved command. Null on error.
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*
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* DESCRIPTION: Get a command from the history buffer
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*
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******************************************************************************/
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char *acpi_db_get_history_by_index(u32 cmd_num)
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{
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u32 i;
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u16 history_index;
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/* Search history buffer */
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history_index = acpi_gbl_lo_history;
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for (i = 0; i < acpi_gbl_num_history; i++) {
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if (acpi_gbl_history_buffer[history_index].cmd_num == cmd_num) {
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/* Found the command, return it */
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return (acpi_gbl_history_buffer[history_index].command);
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}
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/* History buffer is circular */
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history_index++;
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if (history_index >= HISTORY_SIZE) {
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history_index = 0;
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}
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}
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acpi_os_printf("Invalid history number: %u\n", history_index);
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return (NULL);
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}
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