feat: add support for console sessions to crashpad and crash handling in kernel

kernel/src/Api/BuildNo.hpp

@@ -12,4 +12,4 @@
 
 #pragma once
 
-#define MONTAUK_BUILD_NUMBER 112
+#define MONTAUK_BUILD_NUMBER 115

kernel/src/Hal/IDT.cpp

@@ -141,7 +141,7 @@ namespace Hal {
             rep.timestampTick = Timekeeping::GetTicks();
 
             CrashReport::AddReport(rep);
-            Sched::SpawnCrashPad();
+            Sched::SpawnCrashPad(proc->pid);
 
             Sched::ExitProcess();
             __builtin_unreachable();

kernel/src/Sched/Scheduler.cpp

@@ -1388,11 +1388,57 @@ namespace Sched {
         return &processTable[slot];
     }
 
-    int SpawnCrashPad() {
+    int SpawnCrashPad(int crasherPid) {
         // Spawn crashpad as a child of init (slot 0), not the crashing process.
-        // We can't use the current process context since we're in ExitProcess.
+        // The crasher is still alive here (we run before its ExitProcess), but
+        // it is about to die, so we must not parent the crashpad to it.
         static constexpr const char* crashpadPath = "0:/apps/crashpad/crashpad.elf";
-        return Spawn(crashpadPath, nullptr);
+
+        // If the crashing process had a redirected console (i.e. it was running
+        // under terminal.elf in a console session), hand the crashpad a write
+        // handle to that same out-stream so it can surface a textual crash
+        // report to the console user when no desktop is running.
+        Process* crasher     = GetProcessByPid(crasherPid);
+        int      crasherSlot = Ipc::SlotForPid(crasherPid);
+        bool     inheritRedir = crasher && crasher->redirected &&
+                                crasher->ioOutHandle >= 0 && crasherSlot >= 0;
+
+        Ipc::Object*    outObj = nullptr;
+        Ipc::HandleType outType = Ipc::HandleType::None;
+        uint32_t        outRights = 0;
+        if (inheritRedir) {
+            if (!Ipc::SnapshotHandleForSlot(crasherSlot, crasher->ioOutHandle,
+                                            outType, outObj, outRights) ||
+                outType != Ipc::HandleType::Stream || outObj == nullptr) {
+                inheritRedir = false;
+            }
+        }
+
+        // Deferred start when inheriting, so we can wire ioOutHandle before _start.
+        int childPid = Spawn(crashpadPath, nullptr, /*startReady=*/!inheritRedir);
+        if (childPid < 0 || !inheritRedir) return childPid;
+
+        Process* child     = GetProcessByPid(childPid);
+        int      childSlot = Ipc::SlotForPid(childPid);
+        if (child && childSlot >= 0) {
+            // Installing with RightWrite retains the stream (writerRefs++/refs++),
+            // so it outlives the crasher's imminent ExitProcess teardown. The
+            // snapshot above and this install run back-to-back with no blocking
+            // call between, while the crasher's handle still pins the stream.
+            int h = Ipc::InstallHandleForSlot(childSlot, outObj, Ipc::HandleType::Stream,
+                                              Ipc::RightWrite | Ipc::RightWait | Ipc::RightDup);
+            if (h >= 0) {
+                child->ioOutHandle = h;
+                child->redirected  = true;
+                child->parentPid   = crasherPid;
+                child->termCols    = crasher->termCols;
+                child->termRows    = crasher->termRows;
+            }
+        }
+
+        // Always start it (even if wiring failed -> it just falls back to silent).
+        StartProcess(childPid);
+        return childPid;
     }
 
 }

kernel/src/Sched/Scheduler.hpp

@@ -190,9 +190,11 @@ namespace Sched {
     // Find a process by PID (returns nullptr if not found or not alive)
     Process* GetProcessByPid(int pid);
 
-    // Spawn a crashpad process with the given crash file path as argument.
+    // Spawn the crashpad to report on a faulted process (pid `crasherPid`).
-    // Called by the exception handler when a process faults.
+    // Called by the exception handler when a process faults. If the crasher had
-    int SpawnCrashPad();
+    // a redirected console, the crashpad inherits its out-stream so it can print
+    // a textual report to a console session with no desktop.
+    int SpawnCrashPad(int crasherPid);
 
     // Get a pointer to slot i in the process table (for enumeration)
     Process* GetProcessSlot(int slot);

programs/src/crashpad/main.cpp

@@ -1,6 +1,6 @@
 /*
     * main.cpp
-    * MontaukOS Crashpad — displays crash reports in a popup window
+    * MontaukOS Crashpad - renders process crash information 
     * Copyright (c) 2026 Daniel Hammer
 */
 
@@ -13,6 +13,20 @@
 
 using namespace gui;
 
+static bool is_desktop_running() {
+    static montauk::abi::ProcInfo procs[256];
+    int count = montauk::proclist(procs, 256);
+    if (count <= 0) return false;
+
+    int self_pid = montauk::getpid();
+    for (int i = 0; i < count; i++) {
+        if (montauk::streq(procs[i].name, "0:/os/desktop.elf")) {
+            return true;
+        }
+    }
+    return false;
+}
+
 static constexpr int WINDOW_W = 460;
 static constexpr int WINDOW_H = 480;
 static constexpr int PADDING   = 12;
@@ -201,6 +215,42 @@ static void render() {
     g_win.present();
 }
 
+// ==== Console (no-desktop) crash report ====
+// When no desktop is running, the crashpad is spawned with its stdout
+// redirected to the same out-stream as the crashed process (wired up by the
+// kernel in SpawnCrashPad), so montauk::print() lands in the console terminal.
+static void emit(const char* s) { montauk::print(s); }
+
+static void emit_kv_hex(const char* key, uint64_t val) {
+    char buf[32];
+    emit("  ");
+    emit(key);
+    emit(": ");
+    format_hex16(buf, val);
+    emit(buf);
+    emit("\n");
+}
+
+static void render_console() {
+    char num[16];
+    emit("\n\033[1;31m*** Process crashed ***\033[0m\n");
+    emit("Process: ");
+    emit(g_report.processName);
+    emit(" (pid ");
+    format_decimal(num, g_report.pid);
+    emit(num);
+    emit(")\n");
+    emit("Exception: ");
+    emit(g_report.exceptionName);
+    emit("\n");
+    emit_kv_hex("RIP", g_report.instructionPointer);
+    emit_kv_hex("RSP", g_report.stackPointer);
+    emit_kv_hex("RFLAGS", g_report.flags);
+    if (g_report.exceptionVector == 0x0E)
+        emit_kv_hex("CR2 (fault addr)", g_report.faultingAddress);
+    emit("\n");
+}
+
 extern "C" void _start() {
     fonts::init();
 
@@ -208,42 +258,48 @@ extern "C" void _start() {
     int available = montauk::crash_report(&g_report);
     if (available <= 0) montauk::exit(1);
 
-    if (!g_win.create("Process Crashed", WINDOW_W, WINDOW_H)) montauk::exit(1);
+    if (is_desktop_running()) {
+        if (!g_win.create("Process Crashed", WINDOW_W, WINDOW_H)) montauk::exit(1);
 
-    render();
+        render();
 
-    while (true) {
+        while (true) {
-        montauk::abi::WinEvent ev;
+            montauk::abi::WinEvent ev;
-        int r = g_win.poll(&ev);
+            int r = g_win.poll(&ev);
-        if (r < 0) break;
+            if (r < 0) break;
-        if (r == 0) {
+            if (r == 0) {
-            montauk::sleep_ms(16);
+                montauk::sleep_ms(16);
-            continue;
+                continue;
-        }
-
-        if (ev.type == 3) break; // close
-
-        if (ev.type == 0 && ev.key.pressed) {
-            if (ev.key.scancode == 0x01) break; // Escape
-            if (ev.key.scancode == 0x51) {
-                // Page Down: scroll down
-                g_scroll += 60;
-                render();
             }
-            if (ev.key.scancode == 0x49) {
+
-                // Page Up: scroll up
+            if (ev.type == 3) break; // close
-                g_scroll -= 60;
+
-                if (g_scroll < 0) g_scroll = 0;
+            if (ev.type == 0 && ev.key.pressed) {
+                if (ev.key.scancode == 0x01) break; // Escape
+                if (ev.key.scancode == 0x51) {
+                    // Page Down: scroll down
+                    g_scroll += 60;
+                    render();
+                }
+                if (ev.key.scancode == 0x49) {
+                    // Page Up: scroll up
+                    g_scroll -= 60;
+                    if (g_scroll < 0) g_scroll = 0;
+                    render();
+                }
+            }
+
+            if (ev.type == 2) {
+                // Resize
                 render();
             }
         }
 
-        if (ev.type == 2) {
+        g_win.destroy();
-            // Resize
+    } else {
-            render();
+        // No desktop: print a textual report to the redirected console.
-        }
+        render_console();
     }
 
-    g_win.destroy();
     montauk::exit(0);
 }