Question

有一种简单的源代码“世界.cpp”,而“bazel”则以这种方式建造:

$ bazel build --cxxopt=-std=c++11 -c dbg --strip=never //examples/hello_world:hello_world

so I can debug it like this, and everything is going well, the source code symbols can display:

$ gdb bazel-bin/examples/hello_world/hello_world
Reading symbols from bazel-bin/examples/hello_world/hello_world...done.
(gdb) b main
Breakpoint 1 at 0x51e9: file examples/hello_world/main.cpp, line 46.
(gdb) r
Starting program: /home/wss/.cache/bazel/_bazel_wss/4110822ab2eb09dee5980f588bc10e42/execroot/com_minieye_aiplorer/bazel-out/k8-dbg/bin/examples/hello_world/hello_world 

Breakpoint 1, main (argc=1, argv=0x7fffffffe1c8) at examples/hello_world/main.cpp:46
warning: Source file is more recent than executable.
46    std::cout << "WITH LINUX~~~" << std::endl;
(gdb) l
41    return 0;
42  }
43  
44  int main(int argc, char *argv[]) {
45  #ifdef WITH_LINUX_PC
46    std::cout << "WITH LINUX~~~" << std::endl;
47  #endif
48    if (jsonHandle(argc, argv) < 0) {
49      return -1;
50    }

但是,当我去拜策-宾/谢普勒/盖洛-世界时,它就显示:

$ cd bazel-bin/examples/hello_world/
$ gdb hello_world
(gdb) b main
Breakpoint 1 at 0x51e9: file examples/hello_world/main.cpp, line 46.
(gdb) l
32  examples/hello_world/main.cpp: No such file or directory
(gdb) l
32  in examples/hello_world/main.cpp

谁能告诉我什么? 如果我想直接根据可执行的双位目录进行ug击,如何做?

======================================
And the same problem is, I build the code of hello-world with cross-comipler toolchains, and scp the executable binary to the target ARM core device, and the log is below:

Reading symbols from hello_world...
(gdb) b main
Breakpoint 1 at 0x40497c
(gdb) l
1       ../sysdeps/aarch64/start.S: No such file or directory.
(gdb) n
The program is not being run.
(gdb) r
Starting program: /app/algo/apa/bin/hello_world

Python Exception <class  NameError > Installation error: gdb._execute_unwinders function is missing:
Breakpoint 1, 0x000000000040497c in main ()
(gdb) l
1       in ../sysdeps/aarch64/start.S
(gdb) n

So, how to debug the program under a embedded enviorment? It still cannot display the source code.

Answer 1

汇编者不得将汇编目录列入辩论信息。相反,它只是将相对途径储存在源文档中。因此,你看到以下信息:

examples/hello_world/main.cpp: No such file or directory

在不了解汇编目录的情况下,亚洲开发银行只是根据目前的工作名录寻找文件。

然而,你可以帮助亚行走。如果是,

(gdb) directory /path/to/project/directory

然后,亚洲开发银行还将在<代码>/path/to/project/directory内查找文档——记住,该名录应为examples/hello_world/main.cpp有效的名录。

You can use show directories to see which directories GDB is using, or use set directories to completely rewrite the stored directory list (the directory command just adds a new directory to the list).

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