LibJS+LibWeb: Move the macro to convert ENOMEM to an exception to LibJS

Move the macro to LibJS and change it to return a throw completion instead of a WebIDL exception. This will let us use this macro within LibJS to handle OOM conditions.
Author: https://github.com/trflynn89 Commit: d8044c5358 Pull-request: https://github.com/SerenityOS/serenity/pull/16895 Reviewed-by: https://github.com/linusg
2025-08-01 21:59:07 +00:00 · 2023-01-07 12:14:54 -05:00 · 2023-01-07 12:14:54 -05:00 · d8044c5358 · 2024-07-17 11:30:54 +09:00
commit d8044c5358
parent ba97f6a0d3
15 changed files with 118 additions and 93 deletions
--- a/Userland/Libraries/LibJS/Runtime/Completion.h
+++ b/Userland/Libraries/LibJS/Runtime/Completion.h
@ -11,10 +11,23 @@
 #include <AK/Optional.h>
 #include <AK/Try.h>
 #include <AK/Variant.h>
+#include <LibJS/Runtime/ErrorTypes.h>
 #include <LibJS/Runtime/Value.h>

 namespace JS {

+#define TRY_OR_THROW_OOM(vm, expression)                                               \
+    ({                                                                                 \
+        /* Ignore -Wshadow to allow nesting the macro. */                              \
+        AK_IGNORE_DIAGNOSTIC("-Wshadow",                                               \
+            auto _temporary_result = (expression));                                    \
+        if (_temporary_result.is_error()) {                                            \
+            VERIFY(_temporary_result.error().code() == ENOMEM);                        \
+            return vm.throw_completion<JS::InternalError>(JS::ErrorType::OutOfMemory); \
+        }                                                                              \
+        _temporary_result.release_value();                                             \
+    })
+
 // 6.2.3 The Completion Record Specification Type, https://tc39.es/ecma262/#sec-completion-record-specification-type
 class [[nodiscard]] Completion {
 public: