1 files changed, 45 insertions, 0 deletions
diff --git a/Kernel/Tasks/CrashHandler.cpp b/Kernel/Tasks/CrashHandler.cpp
new file mode 100644
index 0000000000..3715bbe236
--- /dev/null
+++ b/Kernel/Tasks/CrashHandler.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <Kernel/Arch/CPU.h>
+#include <Kernel/Arch/RegisterState.h>
+
+#include <Kernel/Panic.h>
+#include <Kernel/Tasks/Process.h>
+#include <Kernel/Tasks/Thread.h>
+
+namespace Kernel {
+
+void handle_crash(Kernel::RegisterState const& regs, char const* description, int signal, bool out_of_memory)
+{
+    auto* current_thread = Thread::current();
+    if (!current_thread)
+        PANIC("{} with !Thread::current()", description);
+
+    auto crashed_in_kernel = regs.previous_mode() == ExecutionMode::Kernel;
+    if (!crashed_in_kernel && current_thread->has_signal_handler(signal) && !current_thread->should_ignore_signal(signal) && !current_thread->is_signal_masked(signal)) {
+        current_thread->send_urgent_signal_to_self(signal);
+        return;
+    }
+
+    auto& process = current_thread->process();
+
+    // If a process crashed while inspecting another process,
+    // make sure we switch back to the right page tables.
+    Memory::MemoryManager::enter_process_address_space(process);
+
+    dmesgln("CRASH: CPU #{} {} in {}", Processor::current_id(), description, regs.previous_mode() == ExecutionMode::Kernel ? "kernel"sv : "userspace"sv);
+    dump_registers(regs);
+
+    if (crashed_in_kernel) {
+        process.address_space().with([&](auto& space) { space->dump_regions(); });
+        PANIC("Crash in kernel");
+    }
+
+    process.crash(signal, { regs }, out_of_memory);
+}
+
+}