abort/error: print backtrace, abuse templates, overhaul result/diag (macos not done yet)

libraries/libstratosphere/source/diag/impl/diag_get_all_backtrace.cpp

@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <stratosphere.hpp>
+
+namespace ams::diag::impl {
+
+    namespace {
+
+        constinit uintptr_t g_abort_impl_return_address = std::numeric_limits<uintptr_t>::max();
+
+    }
+
+    size_t GetAllBacktrace(uintptr_t *out, size_t out_size, ::ams::diag::Backtrace &bt) {
+        size_t count = 0;
+        do {
+            /* Check that we can write another return address. */
+            if (count >= out_size) {
+                break;
+            }
+
+            /* Get the current return address. */
+            const uintptr_t ret_addr = bt.GetReturnAddress();
+
+            /* If it's abort impl, reset the trace we're writing. */
+            if (ret_addr == g_abort_impl_return_address) {
+                count = 0;
+            }
+
+            /* Set the output pointer. */
+            out[count++] = ret_addr;
+        } while (bt.Step());
+
+        /* Return the number of addresses written. */
+        return count;
+    }
+
+}