1. gdb打印C++ STL容器

原生gdb通過p打印C++容器，打印出的內(nèi)容往往難以理解，通過以下的腳本可以實現(xiàn)常用容器的打印。

創(chuàng)新互聯(lián)建站堅持“要么做到，要么別承諾”的工作理念，服務領域包括：做網(wǎng)站、網(wǎng)站制作、企業(yè)官網(wǎng)、英文網(wǎng)站、手機端網(wǎng)站、網(wǎng)站推廣等服務，滿足客戶于互聯(lián)網(wǎng)時代的雙遼網(wǎng)站設計、移動媒體設計的需求，幫助企業(yè)找到有效的互聯(lián)網(wǎng)解決方案。努力成為您成熟可靠的網(wǎng)絡建設合作伙伴！

1. 拷貝以下內(nèi)容到新文件stl_views_1.0.3.gdb

#                                                                                                        
#   STL GDB evaluators/views/utilities - 1.03
#
#   The new GDB commands:                                                         
#         are entirely non instrumental                                             
#         do not depend on any "inline"(s) - e.g. size(), [], etc
#       are extremely tolerant to debugger settings
#                                                                                 
#   This file should be "included" in .gdbinit as following:
#   source stl-views.gdb or just paste it into your .gdbinit file
#
#   The following STL containers are currently supported:
#
#       std::vector-- via pvector command
#       std::list-- via plist or plist_member command
#       std::map-- via pmap or pmap_member command
#       std::multimap-- via pmap or pmap_member command
#       std::set-- via pset command
#       std::multiset-- via pset command
#       std::deque-- via pdequeue command
#       std::stack-- via pstack command
#       std::queue-- via pqueue command
#       std::priority_queue-- via ppqueue command
#       std::bitset-- via pbitset command
#       std::string -- via pstring command
#       std::widestring -- via pwstring command
#
#   The end of this file contains (optional) C++ beautifiers
#   Make sure your debugger supports $argc
#
#   Simple GDB Macros writen by Dan Marinescu (H-PhD) - License GPL
#   Inspired by intial work of Tom Malnar, 
#     Tony Novac (PhD) / Cornell / Stanford,
#     Gilad Mishne (PhD) and Many Many Others.
#   Contact: dan_c_marinescu@yahoo.com (Subject: STL)
#
#   Modified to work with g++ 4.3 by Anders Elton
#   Also added _member functions, that instead of printing the entire class in map, prints a member.



#
# std::vector<>#

define pvector
    if $argc == 0
        help pvector
    else
        set $size = $arg0._M_impl._M_finish - $arg0._M_impl._M_start
        set $capacity = $arg0._M_impl._M_end_of_storage - $arg0._M_impl._M_start
        set $size_max = $size - 1
    end
    if $argc == 1
        set $i = 0
        while $i< $size
            printf "elem[%u]: ", $i
            p *($arg0._M_impl._M_start + $i)
            set $i++
        end
    end
    if $argc == 2
        set $idx = $arg1
        if $idx< 0 || $idx >$size_max
            printf "idx1, idx2 are not in acceptable range: [0..%u].\n", $size_max
        else
            printf "elem[%u]: ", $idx
            p *($arg0._M_impl._M_start + $idx)
        end
    end
    if $argc == 3
      set $start_idx = $arg1
      set $stop_idx = $arg2
      if $start_idx >$stop_idx
        set $tmp_idx = $start_idx
        set $start_idx = $stop_idx
        set $stop_idx = $tmp_idx
      end
      if $start_idx< 0 || $stop_idx< 0 || $start_idx >$size_max || $stop_idx >$size_max
        printf "idx1, idx2 are not in acceptable range: [0..%u].\n", $size_max
      else
        set $i = $start_idx
        while $i<= $stop_idx
            printf "elem[%u]: ", $i
            p *($arg0._M_impl._M_start + $i)
            set $i++
        end
      end
    end
    if $argc >0
        printf "Vector size = %u\n", $size
        printf "Vector capacity = %u\n", $capacity
        printf "Element "
        whatis $arg0._M_impl._M_start
    end
end

document pvector
    Prints std::vectorinformation.
    Syntax: pvectorNote: idx, idx1 and idx2 must be in acceptable range [0...size()-1].
    Examples:
    pvector v - Prints vector content, size, capacity and T typedef
    pvector v 0 - Prints element[idx] from vector
    pvector v 1 2 - Prints elements in range [idx1..idx2] from vector
end 

#
# std::list<>#

define plist
    if $argc == 0
        help plist
    else
        set $head = &$arg0._M_impl._M_node
        set $current = $arg0._M_impl._M_node._M_next
        set $size = 0
        while $current != $head
            if $argc == 2
                printf "elem[%u]: ", $size
                p *($arg1*)($current + 1)
            end
            if $argc == 3
                if $size == $arg2
                    printf "elem[%u]: ", $size
                    p *($arg1*)($current + 1)
                end
            end
            set $current = $current._M_next
            set $size++
        end
        printf "List size = %u \n", $size
        if $argc == 1
            printf "List "
            whatis $arg0
            printf "Use plistto see the elements in the list.\n"
        end
    end
end

document plist
    Prints std::listinformation.
    Syntax: plist: Prints list size, if T defined all elements or just element at idx
    Examples:
    plist l - prints list size and definition
    plist l int - prints all elements and list size
    plist l int 2 - prints the third element in the list (if exists) and list size
end

define plist_member
    if $argc == 0
        help plist_member
    else
        set $head = &$arg0._M_impl._M_node
        set $current = $arg0._M_impl._M_node._M_next
        set $size = 0
        while $current != $head
            if $argc == 3
                printf "elem[%u]: ", $size
                p (*($arg1*)($current + 1)).$arg2
            end
            if $argc == 4
                if $size == $arg3
                    printf "elem[%u]: ", $size
                    p (*($arg1*)($current + 1)).$arg2
                end
            end
            set $current = $current._M_next
            set $size++
        end
        printf "List size = %u \n", $size
        if $argc == 1
            printf "List "
            whatis $arg0
            printf "Use plist_memberto see the elements in the list.\n"
        end
    end
end

document plist_member
    Prints std::listinformation.
    Syntax: plist: Prints list size, if T defined all elements or just element at idx
    Examples:
    plist_member l int member - prints all elements and list size
    plist_member l int member 2 - prints the third element in the list (if exists) and list size
end


#
# std::map and std::multimap
#

define pmap
    if $argc == 0
        help pmap
    else
        set $tree = $arg0
        set $i = 0
        set $node = $tree._M_t._M_impl._M_header._M_left
        set $end = $tree._M_t._M_impl._M_header
        set $tree_size = $tree._M_t._M_impl._M_node_count
        if $argc == 1
            printf "Map "
            whatis $tree
            printf "Use pmapto see the elements in the map.\n"
        end
        if $argc == 3
            while $i< $tree_size
                set $value = (void *)($node + 1)
                printf "elem[%u].left: ", $i
                p *($arg1*)$value
                set $value = $value + sizeof($arg1)
                printf "elem[%u].right: ", $i
                p *($arg2*)$value
                if $node._M_right != 0
                    set $node = $node._M_right
                    while $node._M_left != 0
                        set $node = $node._M_left
                    end
                else
                    set $tmp_node = $node._M_parent
                    while $node == $tmp_node._M_right
                        set $node = $tmp_node
                        set $tmp_node = $tmp_node._M_parent
                    end
                    if $node._M_right != $tmp_node
                        set $node = $tmp_node
                    end
                end
                set $i++
            end
        end
        if $argc == 4
            set $idx = $arg3
            set $ElementsFound = 0
            while $i< $tree_size
                set $value = (void *)($node + 1)
                if *($arg1*)$value == $idx
                    printf "elem[%u].left: ", $i
                    p *($arg1*)$value
                    set $value = $value + sizeof($arg1)
                    printf "elem[%u].right: ", $i
                    p *($arg2*)$value
                    set $ElementsFound++
                end
                if $node._M_right != 0
                    set $node = $node._M_right
                    while $node._M_left != 0
                        set $node = $node._M_left
                    end
                else
                    set $tmp_node = $node._M_parent
                    while $node == $tmp_node._M_right
                        set $node = $tmp_node
                        set $tmp_node = $tmp_node._M_parent
                    end
                    if $node._M_right != $tmp_node
                        set $node = $tmp_node
                    end
                end
                set $i++
            end
            printf "Number of elements found = %u\n", $ElementsFound
        end
        if $argc == 5
            set $idx1 = $arg3
            set $idx2 = $arg4
            set $ElementsFound = 0
            while $i< $tree_size
                set $value = (void *)($node + 1)
                set $valueLeft = *($arg1*)$value
                set $valueRight = *($arg2*)($value + sizeof($arg1))
                if $valueLeft == $idx1 && $valueRight == $idx2
                    printf "elem[%u].left: ", $i
                    p $valueLeft
                    printf "elem[%u].right: ", $i
                    p $valueRight
                    set $ElementsFound++
                end
                if $node._M_right != 0
                    set $node = $node._M_right
                    while $node._M_left != 0
                        set $node = $node._M_left
                    end
                else
                    set $tmp_node = $node._M_parent
                    while $node == $tmp_node._M_right
                        set $node = $tmp_node
                        set $tmp_node = $tmp_node._M_parent
                    end
                    if $node._M_right != $tmp_node
                        set $node = $tmp_node
                    end
                end
                set $i++
            end
            printf "Number of elements found = %u\n", $ElementsFound
        end
        printf "Map size = %u\n", $tree_size
    end
end

document pmap
    Prints std::mapor std::multimapinformation. Works for std::multimap as well.
    Syntax: pmap

2. 在啟動gdb時，輸入source [腳本所在位置]/stl_views_1.0.3.gdb來啟用這個工具

我將文件放在了~/目錄下，啟動gdb后，輸入以下內(nèi)容：

source ~/stl_views_1.0.3.gdb

如果不想每次啟動gdb都要手動輸入source ~/stl_views_1.0.3.gdb讀取腳本，可以將上面stl_views_1.0.3.gdb的內(nèi)容直接拷貝到.gdbinit文件中，具體操作可以看后面的第二大點

3. 例如，有一個std::vector類型的data，通過以下命令可以打印出vector的內(nèi)容

pvector data

同樣的，可以通過pmap，pset，plist…等等來打印STL容器的內(nèi)容，方便調(diào)試。

2 .gdbinit文件

gdb在啟動的時候，會在你的當前工作目錄下查找 “.gdbinit” 這個文件，并把它的內(nèi)容作為gdb命令進行解釋

1. 在/home/xxx下添加一個.gdbinit， gdb每次啟動時，它都會執(zhí)行這個文件中的命令來進行初始化。
2. 下面有一個我認為比較好用的gdb，可以直接拷貝到用戶目錄下的./gdbinit文件中對gdb進行配置

# 保存歷史命令
#set history filename ./.gdb_history
#set history save on
  
# 記錄執(zhí)行gdb的過程
#set logging file ./.log.txt
#set logging on
 
# 退出時不顯示提示信息
#set confirm off
 
# 將地址的顏色改成紅色
#set style address foreground red
 
# 打印數(shù)組的索引下標
set print array-indexes on
 
# 每行打印一個結構體成員
set print pretty on
 
# 退出并保留斷點
define qbp
save breakpoints ./.gdb_bp
quit
end
document qbp
Exit and save the breakpoint
end
 
# 保留歷史工作斷點
define downbp
save breakpoints ./.gdb_bp
end
document downbp
Save the historical work breakpoint
end
 
# 加載歷史工作斷點
define loadbp
source ./.gdb_bp
end
document loadbp
Load the historical work breakpoint
end

3. 保存退出后，在該用戶下進行gdb調(diào)試，就會自動啟用.gdbinit文件中的這些配置啦

你是否還在尋找穩(wěn)定的海外服務器提供商？創(chuàng)新互聯(lián)www.cdcxhl.cn海外機房具備T級流量清洗系統(tǒng)配攻擊溯源，準確流量調(diào)度確保服務器高可用性，企業(yè)級服務器適合批量采購，新人活動首月15元起，快前往官網(wǎng)查看詳情吧

當前標題：【gdb配置】打印stl容器，.gdbinit文件-創(chuàng)新互聯(lián)
分享路徑：http://www.yijiale78.com/article48/cspphp.html

成都網(wǎng)站建設公司_創(chuàng)新互聯(lián)，為您提供App開發(fā)、外貿(mào)網(wǎng)站建設、用戶體驗、服務器托管、網(wǎng)站建設、建站公司

廣告

聲明：本網(wǎng)站發(fā)布的內(nèi)容（圖片、視頻和文字）以用戶投稿、用戶轉載內(nèi)容為主，如果涉及侵權請盡快告知，我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場，如需處理請聯(lián)系客服。電話：028-86922220；郵箱：631063699@qq.com。內(nèi)容未經(jīng)允許不得轉載，或轉載時需注明來源： 創(chuàng)新互聯(lián)