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LibDebug: Add static attach() function

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This function is similar to exec_and_attach(), but instead of spawning
a new process and debugging it, it attaches to an existing process.
This commit is contained in:
Itamar 2023-02-05 22:53:21 +02:00 • committed by Andreas Kling
parent ddec9cb1f0
commit 26250fe14a
2 changed files with 21 additions and 0 deletions
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20
Userland/Libraries/LibDebug/DebugSession.cpp
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@ -129,6 +129,26 @@ OwnPtr<DebugSession> DebugSession::exec_and_attach(DeprecatedString const& comma
return debug_session;
}
OwnPtr<DebugSession> DebugSession::attach(pid_t pid, DeprecatedString source_root)
{
if (ptrace(PT_ATTACH, pid, 0, 0) < 0) {
perror("PT_ATTACH");
return {};
}
int status = 0;
if (waitpid(pid, &status, WSTOPPED | WEXITED) != pid || !WIFSTOPPED(status)) {
perror("waitpid");
return {};
}
auto debug_session = adopt_own(*new DebugSession(pid, source_root));
// At this point, libraries should have been loaded
debug_session->update_loaded_libs();
return debug_session;
}
bool DebugSession::poke(FlatPtr address, FlatPtr data)
{
if (ptrace(PT_POKE, m_debuggee_pid, bit_cast<void*>(address), bit_cast<void*>(data)) < 0) {

1
Userland/Libraries/LibDebug/DebugSession.h
View file

@ -28,6 +28,7 @@ namespace Debug {
class DebugSession : public ProcessInspector {
public:
static OwnPtr<DebugSession> exec_and_attach(DeprecatedString const& command, DeprecatedString source_root = {}, Function<ErrorOr<void>()> setup_child = {});
static OwnPtr<DebugSession> attach(pid_t pid, DeprecatedString source_root = {});
virtual ~DebugSession() override;