gdb錯誤：無法執行格式：文件未被識別

Question

我正在嘗試調試我的項目，其中包含5個文件。我使用Makefiles系統構建了該項目。我的Makefile如下所示：

CC=gcc 

CFLAGS= -g -c 

all: main.o io_ops.o rw_ops.o help_functions.o 
    $(CC) -o db main.o io_ops.o rw_ops.o help_functions.o 
io_ops.o:io_ops.c db_ops.h 
    $(CC) $(CFLAGS) io_ops.c db_ops.h 
rw_ops.o: rw_ops_c db_ops.h 
    $(CC) $(CFLAGS) rw_ops.c db_ops.h 
help_functions.o: help_functions.c 
    $(CC) $(CFLAGS) help_functions.c 
clean: 
    rm *.o db 

我的可執行文件名爲db。所以，我在我的終端上運行下面的命令：

gdb db 

然後我就GDB鍵入以下命令：

list main.c 

我得到以下錯誤：沒有定義的main.c 我試着鍵入以下命令：

list main.c 

我得到以下錯誤： 的main.c：不可執行文件格式：文件無法識別

爲了確保我的GDB是64位的程序，我輸入以下命令：

(gdb) show configuration 
This GDB was configured as follows: 
configure --host=x86_64-linux-gnu --target=x86_64-linux-gnu 
     --with-auto-load-dir=$debugdir:$datadir/auto-load 
     --with-auto-load-safe-path=$debugdir:$datadir/auto-load 
     --with-expat 
     --with-gdb-datadir=/usr/share/gdb (relocatable) 
     --with-jit-reader-dir=/usr/lib/gdb (relocatable) 
     --without-libunwind-ia64 
     --with-lzma 
     --with-python=/usr (relocatable) 
     --with-separate-debug-dir=/usr/lib/debug (relocatable) 
     --with-system-gdbinit=/etc/gdb/gdbinit 
     --with-zlib 
     --without-babeltrace 

這是我的可執行的一些信息：

db: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=25731950b7f76cf428eeca5fcc534555d677f3dc, not stripped

我不知道，是什麼問題。任何想法？

Answer 1

你想要做什麼是list main.c:1

list沒有作出列表中的文件，你使用它的方式。從GDB的幫助：

(gdb) help list

List specified function or line.

With no argument, lists ten more lines after or around previous listing.

"list -" lists the ten lines before a previous ten-line listing.

One argument specifies a line, and ten lines are listed around that line. Two arguments with comma between specify starting and ending lines to list. Lines can be specified in these ways:

LINENUM, to list around that line in current file,

FILE:LINENUM, to list around that line in that file,

FUNCTION, to list around beginning of that function,

FILE:FUNCTION, to distinguish among like-named static functions.

*ADDRESS, to list around the line containing that address.

With two args if one is empty it stands for ten lines away from the other arg.

Answer 2

I do not know, what is the problem.

你可能想list main代替。

說明：有命令的four forms命令，沒有將文件名作爲參數。