c/cpp-useful-tools

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cdecl

Cdecl (and c++decl) is a program for encoding and decoding C (or C++) type declarations.

cdecl online website

size(on mac)

size -- print the size of the sections in an object file. size -x(print by hex) -l -m a.out

otool(on mac)

otool -- object file displaying tool. otool -s __TEXT(which segment) __text(which section) a.out

nm(on mac)

see the symbol table nm libwens.so

strings

find the printable strings in a object, or other binary, file

clang++ & g++ options

  1. -fno-elide-constructors

debugging & profiling

  1. valgrind
  2. windows debug runtime
  3. tracy
  4. heaptrack

define config

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#if defined(_MSC_VER)
#   if _MSC_VER <= 1900
#       error Boost.PFR library requires MSVC with c++17 support (Visual Studio 2017 or later).
#   endif
#elif __cplusplus < 201402L
#   error Boost.PFR library requires at least C++14.
#endif

static code analyzer

  1. clang static analyzer
  2. pvs-studio
  3. cppchecker

dynamic analyzer

  1. valgrind
  2. Dr.Memory
  3. Intel Inspector

compile analyzer

  1. Address sanitizer
  2. Memory sanitizer
  3. Thread sanitizer clang main.cpp -o main -fsanitizer=address | memory | thread

performance profile tool

  1. intel vtune amplifier

gdb

  1. break xxxx if xxxx
  2. break then execute command 
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    (gdb) b do_mmap_pgoff
    Breakpoint 1 at 0xffffffff8111a441: file mm/mmap.c, line 940.
    (gdb) command 1
    Type commands for when breakpoint 1 is hit, one per line.
    End with a line saying just "end".
    >print addr
    >print len
    >print prot
    >end
    (gdb)
  3. gdb --args pizzamaker --deep-dish --toppings=pepperoni (gdb) set args [the arg list] (gdb) show args
  4. macro expand task_is_stopped_or_traced(init_task)
  5. ctrl+x+a toggle to / from tui mode ctrl+p / ctrl+n previous or next command in tui mode ctrl+x+2 swith between windows
  6. ctrl+l clear the gdb commandline or reflesh the screen
  7. set print pretty on open print pretty
  8. set print array-indexes on open array index
  9. info share no info in bt, maybe miss sharelib
    info source show info for current source file
    set substitute-path from to set the source file
  10. file the_exec_file no info in bt, maybe not read the symble of executable
  11. start go to program start(main function, generally)
  12. record debug reverse
  13. g++ -g3 for macro info, which -g is g2 for default
  14. dprintf location, format_string dynamic printf in gdb
  15. show non-stop/ show scheduler-locking gdb non-stop mode or all-stop mode
  16. set coredump >> 默认corefile是生成在程序的执行目录下或者程序启动调用了chdir之后的目录,我们可以通过设置生成corefile的格式来控制它，让其生成在固定的目录下。

/proc/sys/kernel/core_uses_pid可以控制产生的core文件的文件名中是否添加pid作为扩展，如果添加则文件内容为1，否则为0 /proc/sys/kernel/core_pattern可以设置格式化的core文件保存位置或文件名，比如原来文件内容是core-%e

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# echo "/home/wens07/programming/build/core_%e_%p" > /proc/sys/kernel/core_pattern
将会控制所产生的core文件会存放到corefile目录下，产生的文件名为core-命令名-pid-时间戳

或者

$ sysctl -w kernel.core_pattern=/corefile/core-%e-%p-%t
如果想让每次启动都保存设置，则需要写入配置文件中.

# echo "kernel.core_pattern=/home/wens07/programming/build/core_%e_%p" >> /etc/sysctl.conf
# sysctl -p /etc/sysctl.conf

kernel.core_pattern =/home/wens07/programming/build/core_%e_%p
关于格式的的控制有如下几个参数：

复制代码
%%：相当于%
%p：相当于<pid>
%u：相当于<uid>
%g：相当于<gid>
%s：相当于导致dump的信号的数字
%t：相当于dump的时间
%e：相当于执行文件的名称
%h：相当于hostname
  1. using gdbserver
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    # remote target
    gdbserver localhost:<port-numer> <program> <args>

    # local host
    gdb 
    file <program>
    target remote <ip-of-target>:<port-numer>
    set sysroot <path-to-sysroot>
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