Skip to content

Move AT_EXECFN to fallback for /proc/self/exe #78958

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Nov 30, 2022
Merged

Move AT_EXECFN to fallback for /proc/self/exe #78958

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
87b691b
Move AT_EXECFN to fallback for /proc/self/exe
am11 Nov 30, 2022
fb3617f
Update src/native/minipal/getexepath.h
am11 Nov 30, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
25 changes: 17 additions & 8 deletions src/native/minipal/getexepath.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -75,21 +75,30 @@ static inline char* minipal_getexepath(void)
// This is a packaging convention that our tooling should enforce.
return strdup("/managed");
#else
#if HAVE_GETAUXVAL && defined(AT_EXECFN)
const char* path = (const char *)(getauxval(AT_EXECFN));
if (path && !errno)
{
return realpath(path, NULL);
}
#endif // HAVE_GETAUXVAL && defined(AT_EXECFN)
#ifdef __linux__
const char* symlinkEntrypointExecutable = "/proc/self/exe";
#else
const char* symlinkEntrypointExecutable = "/proc/curproc/exe";
#endif

// Resolve the symlink to the executable from /proc
return realpath(symlinkEntrypointExecutable, NULL);
char* path = realpath(symlinkEntrypointExecutable, NULL);
if (path)
{
return path;
}

#if HAVE_GETAUXVAL && defined(AT_EXECFN)
// fallback to AT_EXECFN, which does not work properly in rare cases
// when .NET process is set as interpreter (shebang).
const char* exePath = (const char *)(getauxval(AT_EXECFN));
if (exePath && !errno)
{
return realpath(exePath, NULL);
}
#endif // HAVE_GETAUXVAL && defined(AT_EXECFN)

return NULL;
#endif // defined(__APPLE__)
}

Expand Down