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//===--- SwiftRT-ELF-WASM.cpp ---------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "ImageInspectionCommon.h"
#include "swift/shims/MetadataSections.h"
#include "swift/Runtime/Backtrace.h"
#include <cstddef>
#include <new>
#if defined(__ELF__)
extern "C" const char __dso_handle[];
#elif defined(__wasm__)
// NOTE: Multi images in a single process is not yet
// stabilized in WebAssembly toolchain outside of Emscripten.
static constexpr const void *__dso_handle = nullptr;
#endif
#if SWIFT_ENABLE_BACKTRACING
// Drag in a symbol from the backtracer, to force the static linker to include
// the code.
static const void *__backtraceRef __attribute__((used, retain))
= (const void *)swift::runtime::backtrace::_swift_backtrace_isThunkFunction;
#endif
// Create empty sections to ensure that the start/stop symbols are synthesized
// by the linker. Otherwise, we may end up with undefined symbol references as
// the linker table section was never constructed.
#if defined(__ELF__)
# define DECLARE_EMPTY_METADATA_SECTION(name, attrs) __asm__("\t.section " #name ",\"" attrs "\"\n");
#elif defined(__wasm__)
# define DECLARE_EMPTY_METADATA_SECTION(name, attrs) __asm__("\t.section " #name ",\"R\",@\n");
#endif
#define BOUNDS_VISIBILITY __attribute__((__visibility__("hidden"), \
__aligned__(1)))
#define DECLARE_BOUNDS(name) \
BOUNDS_VISIBILITY extern const char __start_##name; \
BOUNDS_VISIBILITY extern const char __stop_##name;
#define DECLARE_SWIFT_SECTION(name) \
DECLARE_EMPTY_METADATA_SECTION(name, "aR") \
DECLARE_BOUNDS(name)
// These may or may not be present, depending on compiler switches; it's
// worth calling them out as a result.
#define DECLARE_SWIFT_REFLECTION_SECTION(name) \
DECLARE_SWIFT_SECTION(name)
extern "C" {
DECLARE_SWIFT_SECTION(swift5_protocols)
DECLARE_SWIFT_SECTION(swift5_protocol_conformances)
DECLARE_SWIFT_SECTION(swift5_type_metadata)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_fieldmd)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_builtin)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_assocty)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_capture)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_reflstr)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_typeref)
DECLARE_SWIFT_REFLECTION_SECTION(swift5_mpenum)
DECLARE_SWIFT_SECTION(swift5_replace)
DECLARE_SWIFT_SECTION(swift5_replac2)
DECLARE_SWIFT_SECTION(swift5_accessible_functions)
DECLARE_SWIFT_SECTION(swift5_runtime_attributes)
DECLARE_SWIFT_SECTION(swift5_tests)
}
#undef DECLARE_SWIFT_SECTION
namespace {
static swift::MetadataSections sections{};
}
__attribute__((__constructor__))
static void swift_image_constructor() {
#define SWIFT_SECTION_RANGE(name) \
{ reinterpret_cast<uintptr_t>(&__start_##name), \
static_cast<uintptr_t>(&__stop_##name - &__start_##name) }
::new (§ions) swift::MetadataSections {
swift::CurrentSectionMetadataVersion,
{ __dso_handle },
nullptr,
nullptr,
SWIFT_SECTION_RANGE(swift5_protocols),
SWIFT_SECTION_RANGE(swift5_protocol_conformances),
SWIFT_SECTION_RANGE(swift5_type_metadata),
SWIFT_SECTION_RANGE(swift5_typeref),
SWIFT_SECTION_RANGE(swift5_reflstr),
SWIFT_SECTION_RANGE(swift5_fieldmd),
SWIFT_SECTION_RANGE(swift5_assocty),
SWIFT_SECTION_RANGE(swift5_replace),
SWIFT_SECTION_RANGE(swift5_replac2),
SWIFT_SECTION_RANGE(swift5_builtin),
SWIFT_SECTION_RANGE(swift5_capture),
SWIFT_SECTION_RANGE(swift5_mpenum),
SWIFT_SECTION_RANGE(swift5_accessible_functions),
SWIFT_SECTION_RANGE(swift5_runtime_attributes),
SWIFT_SECTION_RANGE(swift5_tests),
};
#undef SWIFT_SECTION_RANGE
swift_addNewDSOImage(§ions);
}
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