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LibDebug: Add optional setup_child() callback to debugger

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If set, this callback gets called right after fork() in the child
process.

It can be used by the caller if it wants to perform some logic in the
child process before it starts executing the debuggee program.
This commit is contained in:
Itamar 2021-12-20 22:37:19 +02:00 committed by Brian Gianforcaro
parent 0cea8d1310
commit a02d8e5710
Notes: sideshowbarker 2024-07-17 22:22:44 +09:00 
Author: https://github.com/itamar8910
Commit: https://github.com/SerenityOS/serenity/commit/a02d8e57101
Pull-request: https://github.com/SerenityOS/serenity/pull/11335
2 changed files with 13 additions and 2 deletions
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12
Userland/Libraries/LibDebug/DebugSession.cpp
View file

@ -53,7 +53,9 @@ void DebugSession::for_each_loaded_library(Function<IterationDecision(LoadedLibr
}
}
OwnPtr<DebugSession> DebugSession::exec_and_attach(String const& command, String source_root)
OwnPtr<DebugSession> DebugSession::exec_and_attach(String const& command,
String source_root,
Function<ErrorOr<void>()> setup_child)
{
auto pid = fork();
@ -63,6 +65,14 @@ OwnPtr<DebugSession> DebugSession::exec_and_attach(String const& command, String
}
if (!pid) {
if (setup_child) {
if (setup_child().is_error()) {
perror("DebugSession::setup_child");
exit(1);
}
}
if (ptrace(PT_TRACE_ME, 0, 0, 0) < 0) {
perror("PT_TRACE_ME");
exit(1);

3
Userland/Libraries/LibDebug/DebugSession.h
View file

@ -7,6 +7,7 @@
#pragma once
#include <AK/Demangle.h>
#include <AK/Function.h>
#include <AK/HashMap.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Optional.h>
@ -26,7 +27,7 @@ namespace Debug {
class DebugSession : public ProcessInspector {
public:
static OwnPtr<DebugSession> exec_and_attach(String const& command, String source_root = {});
static OwnPtr<DebugSession> exec_and_attach(String const& command, String source_root = {}, Function<ErrorOr<void>()> setup_child = {});
virtual ~DebugSession() override;