[lldb-dap] inferior always inherits parent environment

[nd]

Happens in lldb-dap version 21.0.0git (revision 7c99601).

To reproduce, debug the program by sending launch { ... "env": {"FOO": "BAR"}}

#include <cstdio>
#include <unistd.h>

int main() {
    char *s = *environ;
    for (int i = 0; s; i++) {
        printf("%s\n", s);
        s = *(environ + i);
    }
    return 0;
}

Expected: the program prints only FOO=BAR.

Actual: the program prints all variables in the parent environment.

[llvmbot]

@llvm/issue-subscribers-lldb-dap

Author: None (nd)

Happens in lldb-dap version 21.0.0git (revision 7c99601).

To reproduce, debug the program by sending launch { ... "env": {"FOO": "BAR"}}

#include <cstdio>
#include <unistd.h>

int main() {
    char *s = *environ;
    for (int i = 0; s; i++) {
        printf("%s\n", s);
        s = *(environ + i);
    }
    return 0;
}

Expected: the program prints only FOO=BAR.

Actual: the program prints all variables in the parent environment.

[da-viper]

This is expected. It is the same behaviour is lldb.

using the command

(lldb) env FOO=BAR

[nd]

What is a suggested way to run a program without some environment variable present in the environment of the starting process?

[da-viper]

you can adding to your launch config

...
"initCommands": [
     "settings set target.inherit-env false"
]

if directly from lldb, run the command before launching the target.

[nd]

Thanks!