extensions/cxx_debugging/src/SymbolsBackend.cc.in

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// clang-format off
#include <string>
#include <vector>

#include <emscripten.h>
#include <emscripten/bind.h>
#include "ApiContext.h"
#include "WasmVendorPlugins.h"

#include "Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
#include "Plugins/ObjectFile/wasm/ObjectFileWasm.h"
#include "Plugins/ScriptInterpreter/None/ScriptInterpreterNone.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
#include "Plugins/SymbolVendor/wasm/SymbolVendorWasm.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/linux/HostInfoLinux.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Base64.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h"

namespace {

struct DefaultPluginsContext
    : symbols_backend::PluginRegistryContext<
                            lldb_private::HostInfoPosix,
                            symbols_backend::WasmPlatform,
                            lldb_private::ScriptInterpreterNone,
                            lldb_private::FileSystem,
                            lldb_private::CPlusPlusLanguage,
                            lldb_private::TypeSystemClang,
                            lldb_private::wasm::ObjectFileWasm,
                            lldb_private::wasm::SymbolVendorWasm,
                            symbols_backend::WasmProcess,
                            symbols_backend::SymbolFileWasmDWARF> {
  DefaultPluginsContext() : PluginRegistryContext() {
    lldb_private::Debugger::Initialize(nullptr);
  }
  ~DefaultPluginsContext() { lldb_private::Debugger::Terminate(); }
};

DefaultPluginsContext& GetGlobalContext() {
  static DefaultPluginsContext global_context;
  return global_context;
}

template <typename T, typename ClassT>
std::function<void(ClassT&, emscripten::val)> OptionalSetter(
    ClassT& (ClassT::*setter)(llvm::Optional<T>)) {
  return [setter](ClassT& cls, emscripten::val value) {
    if (value == emscripten::val::undefined() ||
        value == emscripten::val::null()) {
      (cls.*setter)(llvm::None);
    } else {
      (cls.*setter)(value.as<T>());
    }
  };
}

template <typename T, typename ClassT>
std::function<emscripten::val(const ClassT&)> OptionalGetter(
    llvm::Optional<T> (ClassT::*getter)() const) {
  return [getter](const ClassT& cls) {
    if (auto value = (cls.*getter)()) {
      return emscripten::val(std::move(*value));
    }
    return emscripten::val::undefined();
  };
}
}  // namespace

namespace symbols_backend {
class DWARFSymbolsPlugin : public api::ApiContext {
 public:
  DWARFSymbolsPlugin() : context_(GetGlobalContext()) {}

 private:
  DefaultPluginsContext& context_;
};
}  // namespace symbols_backend




EMSCRIPTEN_BINDINGS(DWARFSymbolsPlugin) {
{%- for spec in specs %}
{%- for ty in list(spec.types.values()) + spec.return_types %}
{%- if not ty.builtin %}

  {%- for enum in ty.enums %}
  emscripten::enum_<symbols_backend::api::{{ty.cxx_name}}::{{enum.cxx_name}}>("{{ty.cxx_name + enum.cxx_name}}")
    {%- for case in enum.members %}
    .value("{{case.upper()}}", symbols_backend::api::{{ty.cxx_name}}::{{enum.cxx_name}}::{{enum.get_member_cxx_name(case)}})
    {%- endfor %}
    ;
  {%- endfor %}

  emscripten::class_<symbols_backend::api::{{ty.cxx_name}}>("{{ty.cxx_name}}")
      .constructor<>()
{%- for member in ty.members %}
{%- if member.optional %}
      .property("{{member.protocol_name}}", OptionalGetter(&symbols_backend::api::{{ty.cxx_name}}::Get{{member.get_accessor_suffix()}}), OptionalSetter(&symbols_backend::api::{{ty.cxx_name}}::Set{{member.get_accessor_suffix()}}))
{%- else %}
      .property("{{member.protocol_name}}", &symbols_backend::api::{{ty.cxx_name}}::Get{{member.get_accessor_suffix()}}, &symbols_backend::api::{{ty.cxx_name}}::Set{{member.get_accessor_suffix()}})
{%- endif %}
{%- endfor %}
      ;


{%- endif %}
{%- endfor %}

{%- for type in spec.array_types().values() %}
{%- if type.builtin %}
  emscripten::register_vector<{{type.cxx_name}}>("{{type.cxx_name.split(':')[-1].title()}}Array");
{%- else %}
  emscripten::register_vector<symbols_backend::api::
{%- if type.enum and type.context -%}{{type.context.cxx_name}}::{%- endif -%}
{{- type.cxx_name }}>("{{type.protocol_name.split(':')[-1]}}Array");
{%- endif %}
{%- endfor %}
  emscripten::register_vector<uint8_t>("ByteArray");

  emscripten::class_<symbols_backend::api::ApiContext>("DWARFSymbolsPluginBase")
      .constructor<>()
      {%- for command in spec.functions.values() %}
      .function("{{command.cxx_name}}",
                &symbols_backend::DWARFSymbolsPlugin::{{command.cxx_name}})
      {%- endfor %}
      ;
  emscripten::class_<symbols_backend::DWARFSymbolsPlugin, emscripten::base<symbols_backend::api::ApiContext>>("DWARFSymbolsPlugin")
      .constructor<>();
{%- endfor %}

}