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LibCore: Implement Process::is_being_debugged for macOS

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The wait_for_debugger_and_break helper now works on macOS with this
change, tested on lldb 14.
This commit is contained in:
Sebastian Zaha 2023-08-02 15:11:49 +02:00 committed by Andrew Kaster
parent 35c45a94d3
commit fc71403842
Notes: sideshowbarker 2024-07-17 20:22:04 +09:00 
Author: https://github.com/SebastianZaha
Commit: https://github.com/SerenityOS/serenity/commit/fc71403842
Pull-request: https://github.com/SerenityOS/serenity/pull/20327
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/AtkinsSJ
1 changed files with 22 additions and 3 deletions
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25
Userland/Libraries/LibCore/Process.cpp
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@ -17,9 +17,11 @@
#include <spawn.h>
#include <unistd.h>
#ifdef AK_OS_SERENITY
#if defined(AK_OS_SERENITY)
# include <serenity.h>
# include <syscall.h>
#elif defined(AK_OS_BSD_GENERIC)
# include <sys/sysctl.h>
#endif
namespace Core {
@ -147,7 +149,7 @@ ErrorOr<void> Process::set_name([[maybe_unused]] StringView name, [[maybe_unused
ErrorOr<bool> Process::is_being_debugged()
{
#ifdef AK_OS_LINUX
#if defined(AK_OS_LINUX)
auto unbuffered_status_file = TRY(Core::File::open("/proc/self/status"sv, Core::File::OpenMode::Read));
auto status_file = TRY(Core::InputBufferedFile::create(move(unbuffered_status_file)));
auto buffer = TRY(ByteBuffer::create_uninitialized(4096));
@ -160,9 +162,26 @@ ErrorOr<bool> Process::is_being_debugged()
return (tracer_pid != 0UL);
}
return false;
#elif defined(AK_OS_MACOS)
// https://developer.apple.com/library/archive/qa/qa1361/_index.html
int mib[4] = {};
struct kinfo_proc info = {};
size_t size = sizeof(info);
// Initialize mib, which tells sysctl the info we want, in this case
// we're looking for information about a specific process ID.
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = getpid();
if (sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &size, NULL, 0) < 0)
return Error::from_syscall("sysctl"sv, -errno);
// We're being debugged if the P_TRACED flag is set.
return ((info.kp_proc.p_flag & P_TRACED) != 0);
#endif
// FIXME: Implement this for more platforms.
// MacOS version: https://developer.apple.com/library/archive/qa/qa1361/_index.html
return Error::from_string_view("Platform does not support checking for debugger"sv);
}