This has had me confused for a while, was stopping me from using the debugger. Found a workaround but still can’t quite solve the why of it. The following line in launch.json wouldn’t pass my “args”:[“”,…] array correctly
CASE 1: "args": ["arg1", "arg2"], // correct way to pass args? CASE 1, doesn’t work.
CASE 2: "args": ["arg1 arg2"], // incorrect way to pass args? CASE 2, works.
CASE 1 example:
"args": ["arg1", "arg2"], // correct way to pass args? CASE 1
with verbose on, gdb reports the following with “;” in between the args in -exec-arguments
Type "apropos word" to search for commands related to "word".
GDB command: 0 -gdb-set non-stop off
GDB result: 0 done
GDB command: 1 -gdb-set mi-async on
GDB result: 1 done
GDB command: 2 -file-exec-and-symbols "/path/to/executable/test"
GDB result: 2 done
GDB command: 3 -enable-pretty-printing
GDB result: 3 done
GDB command: 4 -exec-arguments arg1;arg2
GDB result: 4 done
and trying to print argv in main() gives this:
Number of arguments: 2
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Argument 0: /path/to/executable/test\n"}}
Argument 0: /path/to/executable/test
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Argument 1: arg1\n"}}
Argument 1: arg1
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"argc 2\n"}}
CASE 2 example:
"args": ["arg1 arg2"], // incorrect way to pass args? CASE 2
with verbose on, gdb reports the following -exec-arguments
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"For help, type \"help\".\n"}}
For help, type "help".
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Type \"apropos word\" to search for commands related to \"word\".\n"}}
Type "apropos word" to search for commands related to "word".
GDB command: 0 -gdb-set non-stop off
GDB result: 0 done
GDB command: 1 -gdb-set mi-async on
GDB result: 1 done
GDB command: 2 -file-exec-and-symbols "/path/to/executable/test"
GDB result: 2 done
GDB command: 3 -enable-pretty-printing
GDB result: 3 done
GDB command: 4 -exec-arguments arg1 arg2
GDB result: 4 done
and trying to print argv in main() gives this:
Number of arguments: 3
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Argument 0: /path/to/executable/test\n"}}
Argument 0: /path/to/executable/test
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Argument 1: arg1\n"}}
Argument 1: arg1
To client: {"seq":0,"type":"event","event":"output","body":{"category":"stdout","output":"Argument 2: arg2\n"}}
Argument 2: arg2
Full launch.json
{
"version": "0.2.0",
"configurations": [
{
"name": "CUDA C++: Launch",
"type": "cuda-gdb",
"request": "launch",
"program": "${workspaceFolder}/test",
//"args": ["arg1", "arg2"], // correct way to pass args? CASE 1
"args": ["arg1 arg2"], // incorrect way to pass args? CASE 2
"stopAtEntry": false,
"verboseLogging": true
}
]
}
main entry and print
int main(int argc, char **argv) {
std::cout << "Number of arguments: " << argc << std::endl;
for (int i = 0; i < argc; ++i) {
std::cout << "Argument " << i << ": " << argv[i] << std::endl;
}
Versions:
Ubuntu 22.04.5 LTS; 6.8.0-49-generic
nvcc: NVIDIA (R) Cuda compiler driver Built on Thu_Nov_18_09:45:30_PST_2021
Cuda compilation tools, release 11.5, V11.5.119
Build cuda_11.5.r11.5/compiler.30672275_0
Nsight VSCE v2024.1.34572442
Compiled with g++ -g -O0 for .cpp files, nvcc -g -G -0O for .cu files
g++/gcc 9.5.0
Additional gdb version details:
Summary
Logger successfully initialized
Confirmed that we are on a Linux system
cuda-gdb found and accessible
Calling launch request in super class
GDB notify async: thread-group-added,id=“i1”
To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“NVIDIA (R) CUDA Debugger\n”}}
NVIDIA (R) CUDA Debugger
To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“11.5 release\nPortions Copyright (C) 2007-”}}
11.5 release Portions Copyright (C) 2007-To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“2021 NVIDIA Corporation\n”}}
2021 NVIDIA Corporation
To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“GNU gdb (GDB) 10.1\n”}}
GNU gdb (GDB) 10.1
To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“Copyright (C) 2020 Free Software Foundation, Inc.\n”}}
Copyright (C) 2020 Free Software Foundation, Inc.
To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html\nThis is free software: you are free to change and redistribute it.\nThere is NO WARRANTY, to the extent permitted by law.”}}
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.To client: {“seq”:0,“type”:“event”,“event”:“output”,“body”:{“category”:“stdout”,“output”:“\nType "show copying" and "show warranty" for details.\n”}}