1 files changed, 48 insertions, 0 deletions
diff --git a/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp b/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp
new file mode 100644
index 0000000000..f37a868406
--- /dev/null
+++ b/config/external/rlbox_wasm2c_sandbox/rlbox_wasm2c_thread_locals.cpp
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifdef MOZ_USING_WASM_SANDBOXING
+
+// For MOZ_CRASH_UNSAFE_PRINTF
+#  include "mozilla/Assertions.h"
+
+#  include "mozilla/mozalloc_oom.h"
+
+// Load general firefox configuration of RLBox
+#  include "mozilla/rlbox/rlbox_config.h"
+#  include "mozilla/rlbox/rlbox_wasm2c_tls.hpp"
+#  include "wasm-rt.h"
+
+#  include "nsExceptionHandler.h"
+
+// The MingW compiler does not correctly handle static thread_local inline
+// members. We instead TLS storage via functions. This can be removed if the
+// MingW bug is fixed.
+RLBOX_WASM2C_SANDBOX_STATIC_VARIABLES();
+
+extern "C" {
+
+// Any error encountered by the wasm2c runtime or wasm sandboxed library code
+// is configured to call the below trap handler.
+void moz_wasm2c_trap_handler(wasm_rt_trap_t code) {
+  MOZ_CRASH_UNSAFE_PRINTF("wasm2c crash: %s", wasm_rt_strerror(code));
+}
+
+// The below function is called if a malloc in sandboxed code returns null
+// This indicates that the sandbox has run out of memory.
+void moz_wasm2c_memgrow_failed() {
+  CrashReporter::AnnotateCrashReport(
+      CrashReporter::Annotation::WasmLibrarySandboxMallocFailed, true);
+}
+
+// This function is called when mozalloc_handle_oom is called from within
+// the sandbox. We redirect to that function, ignoring the ctx argument, which
+// is the sandbox itself.
+void w2c_env_mozalloc_handle_oom(void* ctx, uint32_t size) {
+  mozalloc_handle_oom(size);
+}
+}
+
+#endif