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LibJS: Account module storage as external memory

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Report module record vectors, loaded module request attributes, graph
loading visited sets, and module filename storage through the GC
external memory hook.
This commit is contained in:
Andreas Kling
2026-05-06 08:21:43 +02:00
committed by Andreas Kling
parent a414136d7c
commit 745f73bbaa
Notes: github-actions[bot] 2026-05-07 08:04:37 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/745f73bbaa6
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/9286
9 changed files with 122 additions and 0 deletions
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47
Libraries/LibJS/SourceTextModule.cpp
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@@ -10,6 +10,7 @@
#include <LibJS/Bytecode/Executable.h>
#include <LibJS/Runtime/AsyncFunctionDriverWrapper.h>
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
#include <LibJS/Runtime/ExternalMemory.h>
#include <LibJS/Runtime/GlobalEnvironment.h>
#include <LibJS/Runtime/ModuleEnvironment.h>
#include <LibJS/Runtime/PromiseCapability.h>
@@ -24,6 +25,39 @@ namespace JS {
GC_DEFINE_ALLOCATOR(SourceTextModule);
static size_t import_attributes_external_memory_size(Vector<ImportAttribute> const& attributes)
{
size_t size = vector_external_memory_size(attributes);
for (auto const& attribute : attributes) {
size = saturating_add_external_memory_size(size, utf16_string_external_memory_size(attribute.key));
size = saturating_add_external_memory_size(size, utf16_string_external_memory_size(attribute.value));
}
return size;
}
static size_t module_request_external_memory_size(Optional<ModuleRequest> const& request)
{
if (!request.has_value())
return 0;
return import_attributes_external_memory_size(request->attributes);
}
static size_t import_entries_external_memory_size(Vector<ImportEntry> const& entries)
{
size_t size = vector_external_memory_size(entries);
for (auto const& entry : entries)
size = saturating_add_external_memory_size(size, module_request_external_memory_size(entry.m_module_request));
return size;
}
static size_t export_entries_external_memory_size(Vector<ExportEntry> const& entries)
{
size_t size = vector_external_memory_size(entries);
for (auto const& entry : entries)
size = saturating_add_external_memory_size(size, module_request_external_memory_size(entry.m_module_request));
return size;
}
SourceTextModule::SourceTextModule(Realm& realm, StringView filename, Script::HostDefined* host_defined, bool has_top_level_await,
Vector<ModuleRequest> requested_modules, Vector<ImportEntry> import_entries,
Vector<ExportEntry> local_export_entries, Vector<ExportEntry> indirect_export_entries,
@@ -60,6 +94,19 @@ void SourceTextModule::visit_edges(Cell::Visitor& visitor)
visitor.visit(m_tla_shared_data);
}
size_t SourceTextModule::external_memory_size() const
{
size_t size = Base::external_memory_size();
size = saturating_add_external_memory_size(size, import_entries_external_memory_size(m_import_entries));
size = saturating_add_external_memory_size(size, export_entries_external_memory_size(m_local_export_entries));
size = saturating_add_external_memory_size(size, export_entries_external_memory_size(m_indirect_export_entries));
size = saturating_add_external_memory_size(size, export_entries_external_memory_size(m_star_export_entries));
size = saturating_add_external_memory_size(size, vector_external_memory_size(m_var_declared_names));
size = saturating_add_external_memory_size(size, vector_external_memory_size(m_lexical_bindings));
size = saturating_add_external_memory_size(size, vector_external_memory_size(m_functions_to_initialize));
return size;
}
Result<GC::Ref<SourceTextModule>, Vector<ParserError>> SourceTextModule::parse_from_pre_parsed(FFI::ParsedProgram* parsed, NonnullRefPtr<SourceCode const> source_code, Realm& realm, Script::HostDefined* host_defined)
{
auto filename = source_code->filename();