Red Hat ENTERPRISE LINUX 3 - DEVELOPER TOOLS GUIDE Instrukcja Użytkownika Strona 18
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14 Chapter 3. Developing with Red Hat Enterprise Linux Developer Tools
3.3. Run the Executable
To run the program, use the following example:
./hello
The program generates
hello world!
3 + 4 = 7
and returns when the program exits.
3.4. Debug the Executable
To start GDB, use the following commands:
gdb hello
After the initial copyright and configuration information, GDB returns its own prompt, (gdb). The
following is a sample debugging session:
1. To set a breakpoint, type:
break main
The following output displays:
Breakpoint 1 at 0x132: file hello.c, line 15.
Note the exact address and line number may vary, depending upon the target architecture being
debugged and the exact layout of the C code in the hello.c file.
2. To run the program, type:
run
The following output displays (when the program stops at a breakpoint):
Starting program: hello
Breakpoint 1, main () at hello.c:15
15 a = 3;
Again note that the exact line number and instruction displayed is dependent upon the source
code layout.
3. To print the value of variable, a, type:
print a
The following output displays:
$1 = 0
4. To execute the next command, type next:
next
The following output displays:
16 b = 4;
5. To display the value of a again, type:
print a
The following output displays:
$2 = 3
6. To display the program being debugged, type:
list
- Red Hat Enterprise Linux 3 1
- Developer Tools Guide 1
- Table of Contents 3
- Chapter 1 5
- Chapter 2 7
- Basic Principles of the Tools 7
- 2.6. as, the GNU Assembler 10
- 2.7. ld, the GNU Linker 11
- 2.9. gdb, the Debugging Tool 12
- 2.10.1. Example Makefile 13
- Chapter 3 17
- Developer Tools 17
- 3.4. Debug the Executable 18
- 3.3. Run the Executable 18
- 3.5. Assembler Listings 20
- 3.6. Disassembling 20
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