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Refactor libdeno ES module interface. (#1624)

Browse source 
Allows for future asynchronous module loading.

Add support for import.meta.url

Fixes #1496
This commit is contained in:
Ryan Dahl 2019-01-30 17:21:31 -05:00 committed by GitHub
parent 7d278a0383
commit 00597ffde1
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
23 changed files with 884 additions and 467 deletions
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2
libdeno/BUILD.gn
View file

@ -52,6 +52,7 @@ v8_source_set("libdeno") {
"file_util.cc",
"file_util.h",
"internal.h",
"modules.cc",
]
deps = [
":v8",
@ -84,6 +85,7 @@ v8_executable("test_cc") {
sources = [
"file_util_test.cc",
"libdeno_test.cc",
"modules_test.cc",
"test.cc",
]
deps = [

20
libdeno/api.cc
View file

@ -80,7 +80,6 @@ deno::DenoIsolate* unwrap(Deno* d_) {
deno_buf deno_get_snapshot(Deno* d_) {
auto* d = unwrap(d_);
CHECK_NE(d->snapshot_creator_, nullptr);
CHECK(d->resolve_module_.IsEmpty());
d->ClearModules();
d->context_.Reset();
@ -126,20 +125,6 @@ int deno_execute(Deno* d_, void* user_data, const char* js_filename,
return deno::Execute(context, js_filename, js_source) ? 1 : 0;
}
int deno_execute_mod(Deno* d_, void* user_data, const char* js_filename,
const char* js_source, int resolve_only) {
auto* d = unwrap(d_);
deno::UserDataScope user_data_scope(d, user_data);
auto* isolate = d->isolate_;
v8::Locker locker(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
auto context = d->context_.Get(d->isolate_);
CHECK(!context.IsEmpty());
return deno::ExecuteMod(context, js_filename, js_source, resolve_only) ? 1
: 0;
}
int deno_respond(Deno* d_, void* user_data, int32_t req_id, deno_buf buf) {
auto* d = unwrap(d_);
if (d->current_args_ != nullptr) {
@ -210,9 +195,4 @@ void deno_terminate_execution(Deno* d_) {
deno::DenoIsolate* d = reinterpret_cast<deno::DenoIsolate*>(d_);
d->isolate_->TerminateExecution();
}
void deno_resolve_ok(Deno* d_, const char* filename, const char* source) {
deno::DenoIsolate* d = reinterpret_cast<deno::DenoIsolate*>(d_);
d->ResolveOk(filename, source);
}
}

288
libdeno/binding.cc
View file

@ -246,6 +246,57 @@ v8::Local<v8::Object> DenoIsolate::GetBuiltinModules() {
return handle_scope.Escape(builtin_modules_.Get(isolate_));
}
v8::ScriptOrigin ModuleOrigin(v8::Isolate* isolate,
v8::Local<v8::Value> resource_name) {
return v8::ScriptOrigin(resource_name, v8::Local<v8::Integer>(),
v8::Local<v8::Integer>(), v8::Local<v8::Boolean>(),
v8::Local<v8::Integer>(), v8::Local<v8::Value>(),
v8::Local<v8::Boolean>(), v8::Local<v8::Boolean>(),
v8::True(isolate));
}
deno_mod DenoIsolate::RegisterModule(const char* name, const char* source) {
v8::Isolate::Scope isolate_scope(isolate_);
v8::Locker locker(isolate_);
v8::HandleScope handle_scope(isolate_);
auto context = context_.Get(isolate_);
v8::Context::Scope context_scope(context);
v8::Local<v8::String> name_str = v8_str(name, true);
v8::Local<v8::String> source_str = v8_str(source, true);
auto origin = ModuleOrigin(isolate_, name_str);
v8::ScriptCompiler::Source source_(source_str, origin);
v8::TryCatch try_catch(isolate_);
auto maybe_module = v8::ScriptCompiler::CompileModule(isolate_, &source_);
if (try_catch.HasCaught()) {
CHECK(maybe_module.IsEmpty());
HandleException(context, try_catch.Exception());
return 0;
}
auto module = maybe_module.ToLocalChecked();
int id = module->GetIdentityHash();
std::vector<std::string> import_specifiers;
for (int i = 0; i < module->GetModuleRequestsLength(); ++i) {
v8::Local<v8::String> specifier = module->GetModuleRequest(i);
v8::String::Utf8Value specifier_utf8(isolate_, specifier);
import_specifiers.push_back(*specifier_utf8);
}
mods_.emplace(std::piecewise_construct, std::make_tuple(id),
std::make_tuple(isolate_, module, name, import_specifiers));
mods_by_name_[name] = id;
return id;
}
void BuiltinModules(v8::Local<v8::Name> property,
const v8::PropertyCallbackInfo<v8::Value>& info) {
v8::Isolate* isolate = info.GetIsolate();
@ -275,214 +326,12 @@ void Shared(v8::Local<v8::Name> property,
info.GetReturnValue().Set(ab);
}
v8::ScriptOrigin ModuleOrigin(v8::Local<v8::Value> resource_name,
v8::Isolate* isolate) {
return v8::ScriptOrigin(resource_name, v8::Local<v8::Integer>(),
v8::Local<v8::Integer>(), v8::Local<v8::Boolean>(),
v8::Local<v8::Integer>(), v8::Local<v8::Value>(),
v8::Local<v8::Boolean>(), v8::Local<v8::Boolean>(),
v8::True(isolate));
}
void DenoIsolate::ClearModules() {
for (auto it = module_map_.begin(); it != module_map_.end(); it++) {
it->second.Reset();
for (auto it = mods_.begin(); it != mods_.end(); it++) {
it->second.handle.Reset();
}
module_map_.clear();
for (auto it = module_info_map_.begin(); it != module_info_map_.end(); it++) {
it->second.second.Reset();
}
module_info_map_.clear();
}
void DenoIsolate::RegisterModule(const char* filename,
v8::Local<v8::Module> module) {
int id = module->GetIdentityHash();
module_map_.emplace(std::piecewise_construct, std::make_tuple(filename),
std::make_tuple(isolate_, module));
// Identity hash is not necessarily unique
// Therefore, we store a persistent handle along with filenames
// such that we can compare the identites and select the correct module
module_info_map_.emplace(
std::piecewise_construct, std::make_tuple(id),
std::make_tuple(std::piecewise_construct, std::make_tuple(filename),
std::make_tuple(isolate_, module)));
}
v8::MaybeLocal<v8::Module> CompileModule(v8::Local<v8::Context> context,
const char* js_filename,
v8::Local<v8::String> source_text) {
auto* isolate = context->GetIsolate();
v8::Isolate::Scope isolate_scope(isolate);
v8::EscapableHandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
auto origin = ModuleOrigin(v8_str(js_filename, true), isolate);
v8::ScriptCompiler::Source source(source_text, origin);
auto maybe_module = v8::ScriptCompiler::CompileModule(isolate, &source);
if (!maybe_module.IsEmpty()) {
auto module = maybe_module.ToLocalChecked();
CHECK_EQ(v8::Module::kUninstantiated, module->GetStatus());
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
d->RegisterModule(js_filename, module);
}
return handle_scope.EscapeMaybe(maybe_module);
}
v8::MaybeLocal<v8::Module> ResolveCallback(v8::Local<v8::Context> context,
v8::Local<v8::String> specifier,
v8::Local<v8::Module> referrer) {
auto* isolate = context->GetIsolate();
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::EscapableHandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
v8::String::Utf8Value specifier_utf8val(isolate, specifier);
const char* specifier_cstr = ToCString(specifier_utf8val);
auto builtin_modules = d->GetBuiltinModules();
bool has_builtin = builtin_modules->Has(context, specifier).ToChecked();
if (has_builtin) {
auto val = builtin_modules->Get(context, specifier).ToLocalChecked();
CHECK(val->IsObject());
auto obj = val->ToObject(isolate);
// In order to export obj as a module, we must iterate over its properties
// and export them each individually.
std::string src = "let globalEval = eval\nlet g = globalEval('this');\n";
auto names = obj->GetOwnPropertyNames(context).ToLocalChecked();
for (uint32_t i = 0; i < names->Length(); i++) {
auto name = names->Get(context, i).ToLocalChecked();
v8::String::Utf8Value name_utf8val(isolate, name);
const char* name_cstr = ToCString(name_utf8val);
src.append("export const ");
src.append(name_cstr);
src.append(" = g.libdeno.builtinModules.");
src.append(specifier_cstr);
src.append(".");
src.append(name_cstr);
src.append(";\n");
}
auto export_str = v8_str(src.c_str(), true);
auto module =
CompileModule(context, specifier_cstr, export_str).ToLocalChecked();
auto maybe_ok = module->InstantiateModule(context, ResolveCallback);
CHECK(!maybe_ok.IsNothing());
return handle_scope.Escape(module);
}
int ref_id = referrer->GetIdentityHash();
auto range = d->module_info_map_.equal_range(ref_id);
std::string referrer_filename;
for (auto it = range.first; it != range.second; ++it) {
// it->second: <string, v8::Persistent<v8::Module>>
// operator== compares value identities stored in the handles
// https://denolib.github.io/v8-docs/include_2v8_8h_source.html#l00487
// Due to possibilities of identity hash collision, this is necessary
if (it->second.second == referrer) {
referrer_filename = it->second.first;
break;
}
}
CHECK_NE(referrer_filename.size(), 0);
v8::String::Utf8Value specifier_(isolate, specifier);
const char* specifier_c = ToCString(specifier_);
CHECK_NE(d->resolve_cb_, nullptr);
d->resolve_cb_(d->user_data_, specifier_c, referrer_filename.c_str());
if (d->resolve_module_.IsEmpty()) {
// Resolution Error.
std::stringstream err_ss;
err_ss << "NotFound: Cannot resolve module \"" << specifier_c
<< "\" from \"" << referrer_filename << "\"";
auto resolve_error = v8_str(err_ss.str().c_str());
isolate->ThrowException(resolve_error);
return v8::MaybeLocal<v8::Module>();
} else {
auto module = d->resolve_module_.Get(isolate);
d->resolve_module_.Reset();
return handle_scope.Escape(module);
}
}
void DenoIsolate::ResolveOk(const char* filename, const char* source) {
CHECK(resolve_module_.IsEmpty());
auto count = module_map_.count(filename);
if (count == 1) {
auto module = module_map_[filename].Get(isolate_);
resolve_module_.Reset(isolate_, module);
} else {
CHECK_EQ(count, 0);
v8::HandleScope handle_scope(isolate_);
auto context = context_.Get(isolate_);
v8::TryCatch try_catch(isolate_);
auto maybe_module = CompileModule(context, filename, v8_str(source, true));
if (maybe_module.IsEmpty()) {
DCHECK(try_catch.HasCaught());
HandleException(context, try_catch.Exception());
} else {
auto module = maybe_module.ToLocalChecked();
resolve_module_.Reset(isolate_, module);
}
}
}
bool ExecuteMod(v8::Local<v8::Context> context, const char* js_filename,
const char* js_source, bool resolve_only) {
auto* isolate = context->GetIsolate();
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
auto source = v8_str(js_source, true);
v8::TryCatch try_catch(isolate);
auto maybe_module = CompileModule(context, js_filename, source);
if (maybe_module.IsEmpty()) {
DCHECK(try_catch.HasCaught());
HandleException(context, try_catch.Exception());
return false;
}
DCHECK(!try_catch.HasCaught());
auto module = maybe_module.ToLocalChecked();
auto maybe_ok = module->InstantiateModule(context, ResolveCallback);
if (maybe_ok.IsNothing()) {
DCHECK(try_catch.HasCaught());
HandleException(context, try_catch.Exception());
return false;
}
CHECK_EQ(v8::Module::kInstantiated, module->GetStatus());
if (resolve_only) {
return true;
}
auto result = module->Evaluate(context);
if (result.IsEmpty()) {
DCHECK(try_catch.HasCaught());
CHECK_EQ(v8::Module::kErrored, module->GetStatus());
HandleException(context, module->GetException());
return false;
}
return true;
mods_.clear();
mods_by_name_.clear();
}
bool Execute(v8::Local<v8::Context> context, const char* js_filename,
@ -558,18 +407,35 @@ void MessageCallback(v8::Local<v8::Message> message,
HandleExceptionMessage(context, message);
}
void HostInitializeImportMetaObjectCallback(v8::Local<v8::Context> context,
v8::Local<v8::Module> module,
v8::Local<v8::Object> meta) {
auto* isolate = context->GetIsolate();
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
v8::Isolate::Scope isolate_scope(isolate);
CHECK(!module.IsEmpty());
deno_mod id = module->GetIdentityHash();
CHECK_NE(id, 0);
auto* info = d->GetModuleInfo(id);
const char* url = info->name.c_str();
meta->CreateDataProperty(context, v8_str("url"), v8_str(url, true))
.ToChecked();
}
void DenoIsolate::AddIsolate(v8::Isolate* isolate) {
isolate_ = isolate;
// Leaving this code here because it will probably be useful later on, but
// disabling it now as I haven't got tests for the desired behavior.
// d->isolate->SetAbortOnUncaughtExceptionCallback(AbortOnUncaughtExceptionCallback);
// d->isolate->AddMessageListener(MessageCallback2);
// d->isolate->SetFatalErrorHandler(FatalErrorCallback2);
isolate_->SetCaptureStackTraceForUncaughtExceptions(
true, 10, v8::StackTrace::kDetailed);
isolate_->SetPromiseRejectCallback(deno::PromiseRejectCallback);
isolate_->SetData(0, this);
isolate_->AddMessageListener(MessageCallback);
isolate->SetHostInitializeImportMetaObjectCallback(
HostInitializeImportMetaObjectCallback);
}
} // namespace deno

49
libdeno/deno.h
View file

@ -25,26 +25,15 @@ typedef struct deno_s Deno;
typedef void (*deno_recv_cb)(void* user_data, int32_t req_id,
deno_buf control_buf, deno_buf data_buf);
// A callback to implement ES Module imports. User must call deno_resolve_ok()
// at most once during deno_resolve_cb. If deno_resolve_ok() is not called, the
// specifier is considered invalid and will issue an error in JS. The reason
// deno_resolve_cb does not return deno_module is to avoid unnecessary heap
// allocations.
typedef void (*deno_resolve_cb)(void* user_data, const char* specifier,
const char* referrer);
void deno_resolve_ok(Deno* d, const char* filename, const char* source);
void deno_init();
const char* deno_v8_version();
void deno_set_v8_flags(int* argc, char** argv);
typedef struct {
int will_snapshot; // Default 0. If calling deno_get_snapshot 1.
deno_buf load_snapshot; // Optionally: A deno_buf from deno_get_snapshot.
deno_buf shared; // Shared buffer to be mapped to libdeno.shared
deno_recv_cb recv_cb; // Maps to libdeno.send() calls.
deno_resolve_cb resolve_cb; // Each import calls this.
int will_snapshot; // Default 0. If calling deno_get_snapshot 1.
deno_buf load_snapshot; // Optionally: A deno_buf from deno_get_snapshot.
deno_buf shared; // Shared buffer to be mapped to libdeno.shared
deno_recv_cb recv_cb; // Maps to libdeno.send() calls.
} deno_config;
// Create a new deno isolate.
@ -65,16 +54,6 @@ void deno_delete(Deno* d);
int deno_execute(Deno* d, void* user_data, const char* js_filename,
const char* js_source);
// Compile and execute an ES module. Caller must have provided a deno_resolve_cb
// when instantiating the Deno object.
// Return value: 0 = fail, 1 = success
// Get error text with deno_last_exception().
// If resolve_only is 0, compile and evaluate the module.
// If resolve_only is 1, compile and collect dependencies of the module
// without running the code.
int deno_execute_mod(Deno* d, void* user_data, const char* js_filename,
const char* js_source, int resolve_only);
// deno_respond sends up to one message back for every deno_recv_cb made.
//
// If this is called during deno_recv_cb, the issuing libdeno.send() in
@ -101,6 +80,26 @@ const char* deno_last_exception(Deno* d);
void deno_terminate_execution(Deno* d);
// Module API
typedef int deno_mod;
// Returns zero on error - check deno_last_exception().
deno_mod deno_mod_new(Deno* d, const char* name, const char* source);
size_t deno_mod_imports_len(Deno* d, deno_mod id);
// Returned pointer is valid for the lifetime of the Deno isolate "d".
const char* deno_mod_imports_get(Deno* d, deno_mod id, size_t index);
typedef deno_mod (*deno_resolve_cb)(void* user_data, const char* specifier,
deno_mod referrer);
void deno_mod_instantiate(Deno* d, void* user_data, deno_mod id,
deno_resolve_cb cb);
void deno_mod_evaluate(Deno* d, void* user_data, deno_mod id);
#ifdef __cplusplus
} // extern "C"
#endif

46
libdeno/internal.h
View file

@ -5,12 +5,25 @@
#include <map>
#include <string>
#include <utility>
#include <vector>
#include "deno.h"
#include "third_party/v8/include/v8.h"
#include "third_party/v8/src/base/logging.h"
namespace deno {
struct ModuleInfo {
std::string name;
v8::Persistent<v8::Module> handle;
std::vector<std::string> import_specifiers;
ModuleInfo(v8::Isolate* isolate, v8::Local<v8::Module> module,
const char* name_, std::vector<std::string> import_specifiers_)
: name(name_), import_specifiers(import_specifiers_) {
handle.Reset(isolate, module);
}
};
// deno_s = Wrapped Isolate.
class DenoIsolate {
public:
@ -21,9 +34,9 @@ class DenoIsolate {
snapshot_creator_(nullptr),
global_import_buf_ptr_(nullptr),
recv_cb_(config.recv_cb),
resolve_cb_(config.resolve_cb),
next_req_id_(0),
user_data_(nullptr) {
user_data_(nullptr),
resolve_cb_(nullptr) {
array_buffer_allocator_ = v8::ArrayBuffer::Allocator::NewDefaultAllocator();
if (config.load_snapshot.data_ptr) {
snapshot_.data =
@ -46,11 +59,22 @@ class DenoIsolate {
}
void AddIsolate(v8::Isolate* isolate);
void RegisterModule(const char* filename, v8::Local<v8::Module> module);
void ResolveOk(const char* filename, const char* source);
deno_mod RegisterModule(const char* name, const char* source);
v8::Local<v8::Object> GetBuiltinModules();
void ClearModules();
v8::Local<v8::Object> GetBuiltinModules();
ModuleInfo* GetModuleInfo(deno_mod id) {
if (id == 0) {
return nullptr;
}
auto it = mods_.find(id);
if (it != mods_.end()) {
return &it->second;
} else {
return nullptr;
}
}
v8::Isolate* isolate_;
v8::ArrayBuffer::Allocator* array_buffer_allocator_;
@ -59,19 +83,13 @@ class DenoIsolate {
v8::SnapshotCreator* snapshot_creator_;
void* global_import_buf_ptr_;
deno_recv_cb recv_cb_;
deno_resolve_cb resolve_cb_;
int32_t next_req_id_;
void* user_data_;
// identity hash -> filename, module (avoid hash collision)
std::multimap<int, std::pair<std::string, v8::Persistent<v8::Module>>>
module_info_map_;
// filename -> Module
std::map<std::string, v8::Persistent<v8::Module>> module_map_;
// Set by deno_resolve_ok
v8::Persistent<v8::Module> resolve_module_;
v8::Persistent<v8::Object> builtin_modules_;
std::map<deno_mod, ModuleInfo> mods_;
std::map<std::string, deno_mod> mods_by_name_;
deno_resolve_cb resolve_cb_;
v8::Persistent<v8::Context> context_;
std::map<int32_t, v8::Persistent<v8::Value>> async_data_map_;

143
libdeno/libdeno_test.cc
View file

@ -3,18 +3,18 @@
TEST(LibDenoTest, InitializesCorrectly) {
EXPECT_NE(snapshot.data_ptr, nullptr);
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "1 + 2"));
deno_delete(d);
}
TEST(LibDenoTest, Snapshotter) {
Deno* d1 = deno_new(deno_config{1, empty, empty, nullptr, nullptr});
Deno* d1 = deno_new(deno_config{1, empty, empty, nullptr});
EXPECT_TRUE(deno_execute(d1, nullptr, "a.js", "a = 1 + 2"));
deno_buf test_snapshot = deno_get_snapshot(d1);
deno_delete(d1);
Deno* d2 = deno_new(deno_config{0, test_snapshot, empty, nullptr, nullptr});
Deno* d2 = deno_new(deno_config{0, test_snapshot, empty, nullptr});
EXPECT_TRUE(
deno_execute(d2, nullptr, "b.js", "if (a != 3) throw Error('x');"));
deno_delete(d2);
@ -23,14 +23,14 @@ TEST(LibDenoTest, Snapshotter) {
}
TEST(LibDenoTest, CanCallFunction) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js",
"if (CanCallFunction() != 'foo') throw Error();"));
deno_delete(d);
}
TEST(LibDenoTest, ErrorsCorrectly) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_FALSE(deno_execute(d, nullptr, "a.js", "throw Error()"));
deno_delete(d);
}
@ -75,7 +75,7 @@ TEST(LibDenoTest, RecvReturnEmpty) {
EXPECT_EQ(buf.data_ptr[1], 'b');
EXPECT_EQ(buf.data_ptr[2], 'c');
};
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "RecvReturnEmpty()"));
EXPECT_EQ(count, 2);
deno_delete(d);
@ -93,14 +93,14 @@ TEST(LibDenoTest, RecvReturnBar) {
EXPECT_EQ(buf.data_ptr[2], 'c');
deno_respond(d, user_data, req_id, strbuf("bar"));
};
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_TRUE(deno_execute(d, d, "a.js", "RecvReturnBar()"));
EXPECT_EQ(count, 1);
deno_delete(d);
}
TEST(LibDenoTest, DoubleRecvFails) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_FALSE(deno_execute(d, nullptr, "a.js", "DoubleRecvFails()"));
deno_delete(d);
}
@ -134,7 +134,7 @@ TEST(LibDenoTest, SendRecvSlice) {
// Send back.
deno_respond(d, user_data, req_id, buf2);
};
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_TRUE(deno_execute(d, d, "a.js", "SendRecvSlice()"));
EXPECT_EQ(count, 5);
deno_delete(d);
@ -151,26 +151,26 @@ TEST(LibDenoTest, JSSendArrayBufferViewTypes) {
EXPECT_EQ(buf.alloc_len, 4321u);
EXPECT_EQ(buf.data_ptr[0], count);
};
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "JSSendArrayBufferViewTypes()"));
EXPECT_EQ(count, 3);
deno_delete(d);
}
TEST(LibDenoTest, TypedArraySnapshots) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "TypedArraySnapshots()"));
deno_delete(d);
}
TEST(LibDenoTest, SnapshotBug) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "SnapshotBug()"));
deno_delete(d);
}
TEST(LibDenoTest, GlobalErrorHandling) {
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, nullptr});
EXPECT_FALSE(deno_execute(d, nullptr, "a.js", "GlobalErrorHandling()"));
std::string expected =
"{\"message\":\"Uncaught ReferenceError: notdefined is not defined\","
@ -199,7 +199,7 @@ TEST(LibDenoTest, DataBuf) {
EXPECT_EQ(buf.data_ptr[0], 1);
EXPECT_EQ(buf.data_ptr[1], 2);
};
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "DataBuf()"));
EXPECT_EQ(count, 1);
// data_buf was subsequently changed in JS, let's check that our copy reflects
@ -212,7 +212,7 @@ TEST(LibDenoTest, DataBuf) {
TEST(LibDenoTest, CheckPromiseErrors) {
static int count = 0;
auto recv_cb = [](auto _, int req_id, auto buf, auto data_buf) { count++; };
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, empty, recv_cb});
EXPECT_EQ(deno_last_exception(d), nullptr);
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "CheckPromiseErrors()"));
EXPECT_EQ(deno_last_exception(d), nullptr);
@ -225,7 +225,7 @@ TEST(LibDenoTest, CheckPromiseErrors) {
}
TEST(LibDenoTest, LastException) {
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, empty, empty, nullptr});
EXPECT_EQ(deno_last_exception(d), nullptr);
EXPECT_FALSE(deno_execute(d, nullptr, "a.js", "\n\nthrow Error('boo');\n\n"));
EXPECT_STREQ(deno_last_exception(d),
@ -240,7 +240,7 @@ TEST(LibDenoTest, LastException) {
}
TEST(LibDenoTest, EncodeErrorBug) {
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, empty, empty, nullptr});
EXPECT_EQ(deno_last_exception(d), nullptr);
EXPECT_FALSE(deno_execute(d, nullptr, "a.js", "eval('a')"));
EXPECT_STREQ(
@ -259,117 +259,10 @@ TEST(LibDenoTest, EncodeErrorBug) {
TEST(LibDenoTest, Shared) {
uint8_t s[] = {0, 1, 2};
deno_buf shared = {nullptr, 0, s, 3};
Deno* d = deno_new(deno_config{0, snapshot, shared, nullptr, nullptr});
Deno* d = deno_new(deno_config{0, snapshot, shared, nullptr});
EXPECT_TRUE(deno_execute(d, nullptr, "a.js", "Shared()"));
EXPECT_EQ(s[0], 42);
EXPECT_EQ(s[1], 43);
EXPECT_EQ(s[2], 44);
deno_delete(d);
}
static const char* mod_a =
"import { retb } from 'b.js'\n"
"if (retb() != 'b') throw Error();";
static const char* mod_b = "export function retb() { return 'b' }";
TEST(LibDenoTest, ModuleResolution) {
static int count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
const char* referrer) {
EXPECT_STREQ(specifier, "b.js");
EXPECT_STREQ(referrer, "a.js");
count++;
auto d = reinterpret_cast<Deno*>(user_data);
deno_resolve_ok(d, "b.js", mod_b);
};
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, resolve_cb});
EXPECT_TRUE(deno_execute_mod(d, d, "a.js", mod_a, false));
EXPECT_EQ(count, 1);
deno_delete(d);
}
TEST(LibDenoTest, ModuleResolutionFail) {
static int count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
const char* referrer) {
EXPECT_STREQ(specifier, "b.js");
EXPECT_STREQ(referrer, "a.js");
count++;
// Do not call deno_resolve_ok();
};
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, resolve_cb});
EXPECT_FALSE(deno_execute_mod(d, d, "a.js", mod_a, false));
EXPECT_EQ(count, 1);
deno_delete(d);
}
TEST(LibDenoTest, ModuleSnapshot) {
Deno* d1 = deno_new(deno_config{1, empty, empty, nullptr, nullptr});
EXPECT_TRUE(deno_execute_mod(d1, nullptr, "x.js",
"const globalEval = eval\n"
"const global = globalEval('this')\n"
"global.a = 1 + 2",
0));
deno_buf test_snapshot = deno_get_snapshot(d1);
deno_delete(d1);
const char* y_src = "if (a != 3) throw Error('x');";
deno_config config{0, test_snapshot, empty, nullptr, nullptr};
Deno* d2 = deno_new(config);
EXPECT_TRUE(deno_execute(d2, nullptr, "y.js", y_src));
deno_delete(d2);
Deno* d3 = deno_new(config);
EXPECT_TRUE(deno_execute_mod(d3, nullptr, "y.js", y_src, false));
deno_delete(d3);
delete[] test_snapshot.data_ptr;
}
TEST(LibDenoTest, ModuleResolveOnly) {
static int count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
const char* referrer) {
EXPECT_STREQ(specifier, "b.js");
EXPECT_STREQ(referrer, "a.js");
count++;
auto d = reinterpret_cast<Deno*>(user_data);
deno_resolve_ok(d, "b.js", mod_b);
};
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, resolve_cb});
// Code should not execute. If executed, the error would be thrown
EXPECT_TRUE(deno_execute_mod(d, d, "a.js",
"import { retb } from 'b.js'\n"
"throw Error('unreachable');",
true));
EXPECT_EQ(count, 1);
deno_delete(d);
}
TEST(LibDenoTest, BuiltinModules) {
static int count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
const char* referrer) {
EXPECT_STREQ(specifier, "b.js");
EXPECT_STREQ(referrer, "c.js");
count++;
auto d = reinterpret_cast<Deno*>(user_data);
deno_resolve_ok(d, "b.js", mod_b);
};
Deno* d = deno_new(deno_config{0, empty, empty, nullptr, resolve_cb});
EXPECT_TRUE(deno_execute(
d, d, "setup.js", "libdeno.builtinModules['deno'] = { foo: 'bar' }; \n"));
EXPECT_EQ(count, 0);
EXPECT_TRUE(
deno_execute_mod(d, d, "c.js",
"import { retb } from 'b.js'\n"
"import * as deno from 'deno'\n"
"if (retb() != 'b') throw Error('retb');\n"
// " libdeno.print('deno ' + JSON.stringify(deno));\n"
"if (deno.foo != 'bar') throw Error('foo');\n",
false));
EXPECT_EQ(count, 1);
deno_delete(d);
}

206
libdeno/modules.cc Normal file
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@ -0,0 +1,206 @@
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
#include "exceptions.h"
#include "internal.h"
using deno::DenoIsolate;
using deno::HandleException;
using v8::Boolean;
using v8::Context;
using v8::EscapableHandleScope;
using v8::HandleScope;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::Locker;
using v8::Module;
using v8::Object;
using v8::ScriptCompiler;
using v8::ScriptOrigin;
using v8::String;
using v8::Value;
std::string BuiltinModuleSrc(Local<Context> context, Local<String> specifier) {
auto* isolate = context->GetIsolate();
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
v8::Isolate::Scope isolate_scope(isolate);
v8::EscapableHandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
v8::String::Utf8Value specifier_utf8val(isolate, specifier);
const char* specifier_cstr = *specifier_utf8val;
auto builtin_modules = d->GetBuiltinModules();
auto val = builtin_modules->Get(context, specifier).ToLocalChecked();
CHECK(val->IsObject());
auto obj = val->ToObject(isolate);
// In order to export obj as a module, we must iterate over its properties
// and export them each individually.
// TODO(ry) Find a better way to do this.
std::string src = "let globalEval = eval\nlet g = globalEval('this');\n";
auto names = obj->GetOwnPropertyNames(context).ToLocalChecked();
for (uint32_t i = 0; i < names->Length(); i++) {
auto name = names->Get(context, i).ToLocalChecked();
v8::String::Utf8Value name_utf8val(isolate, name);
const char* name_cstr = *name_utf8val;
// TODO(ry) use format string.
src.append("export const ");
src.append(name_cstr);
src.append(" = g.libdeno.builtinModules.");
src.append(specifier_cstr);
src.append(".");
src.append(name_cstr);
src.append(";\n");
}
return src;
}
v8::MaybeLocal<v8::Module> ResolveCallback(Local<Context> context,
Local<String> specifier,
Local<Module> referrer) {
auto* isolate = context->GetIsolate();
v8::Isolate::Scope isolate_scope(isolate);
v8::Locker locker(isolate);
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
v8::EscapableHandleScope handle_scope(isolate);
auto builtin_modules = d->GetBuiltinModules();
deno_mod referrer_id = referrer->GetIdentityHash();
auto* referrer_info = d->GetModuleInfo(referrer_id);
CHECK_NE(referrer_info, nullptr);
for (int i = 0; i < referrer->GetModuleRequestsLength(); i++) {
Local<String> req = referrer->GetModuleRequest(i);
if (req->Equals(context, specifier).ToChecked()) {
v8::String::Utf8Value req_utf8(isolate, req);
std::string req_str(*req_utf8);
deno_mod id = 0;
{
bool has_builtin = builtin_modules->Has(context, specifier).ToChecked();
if (has_builtin) {
auto it = d->mods_by_name_.find(req_str.c_str());
if (it != d->mods_by_name_.end()) {
id = it->second;
} else {
std::string src = BuiltinModuleSrc(context, specifier);
id = d->RegisterModule(req_str.c_str(), src.c_str());
}
} else {
id = d->resolve_cb_(d->user_data_, req_str.c_str(), referrer_id);
}
}
// Note: id might be zero, in which case GetModuleInfo will return
// nullptr.
auto* info = d->GetModuleInfo(id);
if (info == nullptr) {
char buf[64 * 1024];
snprintf(buf, sizeof(buf), "Cannot resolve module \"%s\" from \"%s\"",
req_str.c_str(), referrer_info->name.c_str());
isolate->ThrowException(deno::v8_str(buf, true));
break;
} else {
Local<Module> child_mod = info->handle.Get(isolate);
return handle_scope.Escape(child_mod);
}
}
}
return v8::MaybeLocal<v8::Module>(); // Error
}
extern "C" {
deno_mod deno_mod_new(Deno* d_, const char* name_cstr,
const char* source_cstr) {
auto* d = unwrap(d_);
return d->RegisterModule(name_cstr, source_cstr);
}
const char* deno_mod_name(Deno* d_, deno_mod id) {
auto* d = unwrap(d_);
auto* info = d->GetModuleInfo(id);
return info->name.c_str();
}
size_t deno_mod_imports_len(Deno* d_, deno_mod id) {
auto* d = unwrap(d_);
auto* info = d->GetModuleInfo(id);
return info->import_specifiers.size();
}
const char* deno_mod_imports_get(Deno* d_, deno_mod id, size_t index) {
auto* d = unwrap(d_);
auto* info = d->GetModuleInfo(id);
if (info == nullptr || index >= info->import_specifiers.size()) {
return nullptr;
} else {
return info->import_specifiers[index].c_str();
}
}
void deno_mod_instantiate(Deno* d_, void* user_data, deno_mod id,
deno_resolve_cb cb) {
auto* d = unwrap(d_);
deno::UserDataScope user_data_scope(d, user_data);
auto* isolate = d->isolate_;
v8::Isolate::Scope isolate_scope(isolate);
v8::Locker locker(isolate);
v8::HandleScope handle_scope(isolate);
auto context = d->context_.Get(d->isolate_);
v8::Context::Scope context_scope(context);
v8::TryCatch try_catch(isolate);
{
CHECK_EQ(nullptr, d->resolve_cb_);
d->resolve_cb_ = cb;
{
auto* info = d->GetModuleInfo(id);
if (info == nullptr) {
return;
}
Local<Module> module = info->handle.Get(isolate);
if (module->GetStatus() == Module::kErrored) {
return;
}
auto maybe_ok = module->InstantiateModule(context, ResolveCallback);
CHECK(maybe_ok.IsJust() || try_catch.HasCaught());
}
d->resolve_cb_ = nullptr;
}
if (try_catch.HasCaught()) {
HandleException(context, try_catch.Exception());
}
}
void deno_mod_evaluate(Deno* d_, void* user_data, deno_mod id) {
auto* d = unwrap(d_);
deno::UserDataScope user_data_scope(d, user_data);
auto* isolate = d->isolate_;
v8::Isolate::Scope isolate_scope(isolate);
v8::Locker locker(isolate);
v8::HandleScope handle_scope(isolate);
auto context = d->context_.Get(d->isolate_);
v8::Context::Scope context_scope(context);
auto* info = d->GetModuleInfo(id);
Local<Module> module = info->handle.Get(isolate);
CHECK_EQ(Module::kInstantiated, module->GetStatus());
auto maybe_result = module->Evaluate(context);
if (maybe_result.IsEmpty()) {
CHECK_EQ(Module::kErrored, module->GetStatus());
HandleException(context, module->GetException());
}
}
} // extern "C"

268
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@ -0,0 +1,268 @@
// Copyright 2018 the Deno authors. All rights reserved. MIT license.
#include "test.h"
static int exec_count = 0;
void recv_cb(void* user_data, int req_id, deno_buf buf, deno_buf data_buf) {
// We use this to check that scripts have executed.
EXPECT_EQ(1u, buf.data_len);
EXPECT_EQ(buf.data_ptr[0], 4);
exec_count++;
}
TEST(ModulesTest, Resolution) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
static deno_mod a = deno_mod_new(d, "a.js",
"import { b } from 'b.js'\n"
"if (b() != 'b') throw Error();\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
const char* b_src = "export function b() { return 'b' }";
static deno_mod b = deno_mod_new(d, "b.js", b_src);
EXPECT_NE(b, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, exec_count);
EXPECT_EQ(1u, deno_mod_imports_len(d, a));
EXPECT_EQ(0u, deno_mod_imports_len(d, b));
EXPECT_STREQ("b.js", deno_mod_imports_get(d, a, 0));
EXPECT_EQ(nullptr, deno_mod_imports_get(d, a, 1));
EXPECT_EQ(nullptr, deno_mod_imports_get(d, b, 0));
static int resolve_count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
deno_mod referrer) {
EXPECT_EQ(referrer, a);
EXPECT_STREQ(specifier, "b.js");
resolve_count++;
return b;
};
deno_mod_instantiate(d, d, b, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_instantiate(d, d, a, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_evaluate(d, d, a);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(1, exec_count);
deno_delete(d);
}
TEST(ModulesTest, BuiltinModules) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
deno_execute(d, d, "setup.js",
"libdeno.builtinModules['deno'] = { foo: 'bar' };");
EXPECT_EQ(nullptr, deno_last_exception(d));
static deno_mod a =
deno_mod_new(d, "a.js",
"import { b } from 'b.js'\n"
"import * as deno from 'deno'\n"
"if (b() != 'b') throw Error('b');\n"
"if (deno.foo != 'bar') throw Error('foo');\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
const char* b_src = "export function b() { return 'b' }";
static deno_mod b = deno_mod_new(d, "b.js", b_src);
EXPECT_NE(b, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, exec_count);
EXPECT_EQ(2u, deno_mod_imports_len(d, a));
EXPECT_EQ(0u, deno_mod_imports_len(d, b));
EXPECT_STREQ("b.js", deno_mod_imports_get(d, a, 0));
EXPECT_STREQ("deno", deno_mod_imports_get(d, a, 1));
EXPECT_EQ(nullptr, deno_mod_imports_get(d, a, 2));
EXPECT_EQ(nullptr, deno_mod_imports_get(d, b, 0));
static int resolve_count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
deno_mod referrer) {
EXPECT_EQ(referrer, a);
EXPECT_STREQ(specifier, "b.js");
resolve_count++;
return b;
};
deno_mod_instantiate(d, d, b, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_instantiate(d, d, a, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_evaluate(d, d, a);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(1, exec_count);
deno_delete(d);
}
TEST(ModulesTest, BuiltinModules2) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
deno_execute(d, d, "setup.js",
"libdeno.builtinModules['builtin1'] = { foo: 'bar' }; \n"
"libdeno.builtinModules['builtin2'] = { hello: 'world' }; \n");
EXPECT_EQ(nullptr, deno_last_exception(d));
static deno_mod a =
deno_mod_new(d, "a.js",
"import * as b1 from 'builtin1'\n"
"import * as b2 from 'builtin2'\n"
"if (b1.foo != 'bar') throw Error('bad1');\n"
"if (b2.hello != 'world') throw Error('bad2');\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(2u, deno_mod_imports_len(d, a));
EXPECT_STREQ("builtin1", deno_mod_imports_get(d, a, 0));
EXPECT_STREQ("builtin2", deno_mod_imports_get(d, a, 1));
deno_mod_instantiate(d, d, a, nullptr);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, exec_count);
deno_mod_evaluate(d, d, a);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, exec_count);
deno_delete(d);
}
TEST(ModulesTest, BuiltinModules3) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
deno_execute(d, d, "setup.js",
"libdeno.builtinModules['builtin'] = { foo: 'bar' };");
EXPECT_EQ(nullptr, deno_last_exception(d));
static deno_mod a =
deno_mod_new(d, "a.js",
"import * as b1 from 'builtin'\n"
"import * as b2 from 'b.js'\n"
"if (b1.foo != 'bar') throw Error('bad1');\n"
"if (b2.bar() != 'bar') throw Error('bad2');\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(2u, deno_mod_imports_len(d, a));
EXPECT_STREQ("builtin", deno_mod_imports_get(d, a, 0));
EXPECT_STREQ("b.js", deno_mod_imports_get(d, a, 1));
static deno_mod b = deno_mod_new(d, "b.js",
"import { foo } from 'builtin';\n"
"export function bar() { return foo }\n");
EXPECT_NE(b, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
static int resolve_count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
deno_mod referrer) {
EXPECT_EQ(referrer, a);
EXPECT_STREQ(specifier, "b.js");
resolve_count++;
return b;
};
deno_mod_instantiate(d, d, a, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_instantiate(d, d, b, resolve_cb);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(0, exec_count);
deno_mod_evaluate(d, d, a);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, exec_count);
deno_delete(d);
}
TEST(ModulesTest, ResolutionError) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
static deno_mod a = deno_mod_new(d, "a.js",
"import 'bad'\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, exec_count);
EXPECT_EQ(1u, deno_mod_imports_len(d, a));
EXPECT_STREQ("bad", deno_mod_imports_get(d, a, 0));
static int resolve_count = 0;
auto resolve_cb = [](void* user_data, const char* specifier,
deno_mod referrer) {
EXPECT_EQ(referrer, a);
EXPECT_STREQ(specifier, "bad");
resolve_count++;
return 0;
};
deno_mod_instantiate(d, d, a, resolve_cb);
EXPECT_NE(nullptr, deno_last_exception(d));
EXPECT_EQ(1, resolve_count);
EXPECT_EQ(0, exec_count);
deno_delete(d);
}
TEST(ModulesTest, ImportMetaUrl) {
exec_count = 0; // Reset
Deno* d = deno_new(deno_config{0, empty, empty, recv_cb});
EXPECT_EQ(0, exec_count);
static deno_mod a =
deno_mod_new(d, "a.js",
"if ('a.js' != import.meta.url) throw 'hmm'\n"
"libdeno.send(new Uint8Array([4]));");
EXPECT_NE(a, 0);
EXPECT_EQ(nullptr, deno_last_exception(d));
deno_mod_instantiate(d, d, a, nullptr);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(0, exec_count);
deno_mod_evaluate(d, d, a);
EXPECT_EQ(nullptr, deno_last_exception(d));
EXPECT_EQ(1, exec_count);
}

2
libdeno/snapshot_creator.cc
View file

@ -23,7 +23,7 @@ int main(int argc, char** argv) {
CHECK(deno::ReadFileToString(js_fn, &js_source));
deno_init();
deno_config config = {1, deno::empty_buf, deno::empty_buf, nullptr, nullptr};
deno_config config = {1, deno::empty_buf, deno::empty_buf, nullptr};
Deno* d = deno_new(config);
int r = deno_execute(d, nullptr, js_fn, js_source.c_str());

5
src/deno_dir.rs
View file

@ -355,9 +355,8 @@ impl DenoDir {
}
}
// Prototype: https://github.com/denoland/deno/blob/golang/os.go#L70-L98
// Returns (module name, local filename)
fn resolve_module(
/// Returns (module name, local filename)
pub fn resolve_module(
self: &Self,
specifier: &str,
referrer: &str,

18
src/errors.rs
View file

@ -1,5 +1,6 @@
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use crate::js_errors::JSError;
pub use crate::msg::ErrorKind;
use crate::resolve_addr::ResolveAddrError;
@ -178,3 +179,20 @@ pub fn permission_denied() -> DenoError {
String::from("permission denied"),
)
}
pub enum RustOrJsError {
Rust(DenoError),
Js(JSError),
}
impl From<DenoError> for RustOrJsError {
fn from(e: DenoError) -> Self {
RustOrJsError::Rust(e)
}
}
impl From<JSError> for RustOrJsError {
fn from(e: JSError) -> Self {
RustOrJsError::Js(e)
}
}

235
src/isolate.rs
View file

@ -3,11 +3,14 @@
// TODO Currently this module uses Tokio, but it would be nice if they were
// decoupled.
#![allow(dead_code)]
use crate::compiler::compile_sync;
use crate::compiler::CodeFetchOutput;
use crate::deno_dir;
use crate::errors::DenoError;
use crate::errors::DenoResult;
use crate::errors::RustOrJsError;
use crate::flags;
use crate::js_errors::JSError;
use crate::libdeno;
@ -21,6 +24,7 @@ use libc::c_char;
use libc::c_void;
use std;
use std::cell::Cell;
use std::collections::HashMap;
use std::env;
use std::ffi::CStr;
use std::ffi::CString;
@ -48,6 +52,10 @@ pub type Dispatch =
fn(isolate: &Isolate, buf: libdeno::deno_buf, data_buf: libdeno::deno_buf)
-> (bool, Box<Op>);
pub struct ModuleInfo {
name: String,
}
pub struct Isolate {
libdeno_isolate: *const libdeno::isolate,
dispatch: Dispatch,
@ -55,6 +63,8 @@ pub struct Isolate {
tx: mpsc::Sender<(i32, Buf)>,
ntasks: Cell<i32>,
timeout_due: Cell<Option<Instant>>,
pub modules: HashMap<libdeno::deno_mod, ModuleInfo>,
pub modules_by_name: HashMap<String, libdeno::deno_mod>,
pub state: Arc<IsolateState>,
}
@ -155,6 +165,7 @@ pub struct Metrics {
pub bytes_sent_control: AtomicUsize,
pub bytes_sent_data: AtomicUsize,
pub bytes_received: AtomicUsize,
pub resolve_count: AtomicUsize,
}
static DENO_INIT: Once = ONCE_INIT;
@ -173,7 +184,6 @@ impl Isolate {
load_snapshot: snapshot,
shared: libdeno::deno_buf::empty(), // TODO Use for message passing.
recv_cb: pre_dispatch,
resolve_cb,
};
let libdeno_isolate = unsafe { libdeno::deno_new(config) };
// This channel handles sending async messages back to the runtime.
@ -186,6 +196,8 @@ impl Isolate {
tx,
ntasks: Cell::new(0),
timeout_due: Cell::new(None),
modules: HashMap::new(),
modules_by_name: HashMap::new(),
state,
}
}
@ -254,34 +266,156 @@ impl Isolate {
Ok(())
}
pub fn mod_new(
&mut self,
name: String,
source: String,
) -> Result<libdeno::deno_mod, JSError> {
let name_ = CString::new(name.clone()).unwrap();
let name_ptr = name_.as_ptr() as *const i8;
let source_ = CString::new(source.clone()).unwrap();
let source_ptr = source_.as_ptr() as *const i8;
let id = unsafe {
libdeno::deno_mod_new(self.libdeno_isolate, name_ptr, source_ptr)
};
if let Some(js_error) = self.last_exception() {
assert_eq!(id, 0);
return Err(js_error);
}
let name2 = name.clone();
self.modules.insert(id, ModuleInfo { name });
debug!("modules_by_name insert {}", name2);
self.modules_by_name.insert(name2, id);
Ok(id)
}
// TODO(ry) This should be private...
pub fn resolve_cb(
&self,
specifier: &str,
referrer: libdeno::deno_mod,
) -> libdeno::deno_mod {
self
.state
.metrics
.resolve_count
.fetch_add(1, Ordering::Relaxed);
debug!("resolve_cb {}", specifier);
let r = self.modules.get(&referrer);
if r.is_none() {
debug!("cant find referrer {}", referrer);
return 0;
}
let referrer_name = &r.unwrap().name;
let r = self.state.dir.resolve_module(specifier, referrer_name);
if let Err(err) = r {
debug!("potentially swallowed err: {}", err);
return 0;
}
let (name, _local_filename) = r.unwrap();
if let Some(id) = self.modules_by_name.get(&name) {
return *id;
} else {
return 0;
}
}
// TODO(ry) make this return a future.
pub fn mod_load_deps(
&mut self,
id: libdeno::deno_mod,
) -> Result<(), RustOrJsError> {
// basically iterate over the imports, start loading them.
let referrer = self.modules.get(&id).unwrap().clone();
let referrer_name = referrer.name.clone();
let len =
unsafe { libdeno::deno_mod_imports_len(self.libdeno_isolate, id) };
for i in 0..len {
let specifier_ptr =
unsafe { libdeno::deno_mod_imports_get(self.libdeno_isolate, id, i) };
let specifier_c: &CStr = unsafe { CStr::from_ptr(specifier_ptr) };
let specifier: &str = specifier_c.to_str().unwrap();
// TODO(ry) This shouldn't be necessary here. builtin modules should be
// taken care of at the libdeno level.
if specifier == "deno" {
continue;
}
let (name, _local_filename) = self
.state
.dir
.resolve_module(specifier, &referrer_name)
.map_err(DenoError::from)
.map_err(RustOrJsError::from)?;
debug!("mod_load_deps {} {}", i, name);
if None == self.modules_by_name.get(&name) {
let out =
code_fetch_and_maybe_compile(&self.state, specifier, &referrer_name)?;
let child_id =
self.mod_new(out.module_name.clone(), out.js_source())?;
self.mod_load_deps(child_id)?;
}
}
Ok(())
}
pub fn mod_instantiate(&self, id: libdeno::deno_mod) -> Result<(), JSError> {
unsafe {
libdeno::deno_mod_instantiate(
self.libdeno_isolate,
self.as_raw_ptr(),
id,
resolve_cb,
)
};
if let Some(js_error) = self.last_exception() {
return Err(js_error);
}
Ok(())
}
pub fn mod_evaluate(&self, id: libdeno::deno_mod) -> Result<(), JSError> {
unsafe {
libdeno::deno_mod_evaluate(self.libdeno_isolate, self.as_raw_ptr(), id)
};
if let Some(js_error) = self.last_exception() {
return Err(js_error);
}
Ok(())
}
/// Executes the provided JavaScript module.
pub fn execute_mod(
&self,
&mut self,
js_filename: &str,
is_prefetch: bool,
) -> Result<(), JSError> {
let out =
code_fetch_and_maybe_compile(&self.state, js_filename, ".").unwrap();
let filename = CString::new(out.filename.clone()).unwrap();
let filename_ptr = filename.as_ptr() as *const i8;
let id = self.mod_new(out.filename.clone(), out.js_source())?;
let js_source = CString::new(out.js_source().clone()).unwrap();
let js_source = CString::new(js_source).unwrap();
let js_source_ptr = js_source.as_ptr() as *const i8;
self.mod_load_deps(id).ok();
let r = unsafe {
libdeno::deno_execute_mod(
self.libdeno_isolate,
self.as_raw_ptr(),
filename_ptr,
js_source_ptr,
if is_prefetch { 1 } else { 0 },
)
};
if r == 0 {
let js_error = self.last_exception().unwrap();
return Err(js_error);
self.mod_instantiate(id)?;
if !is_prefetch {
self.mod_evaluate(id)?;
}
Ok(())
}
@ -393,40 +527,12 @@ fn code_fetch_and_maybe_compile(
extern "C" fn resolve_cb(
user_data: *mut c_void,
specifier_ptr: *const c_char,
referrer_ptr: *const c_char,
) {
referrer: libdeno::deno_mod,
) -> libdeno::deno_mod {
let isolate = unsafe { Isolate::from_raw_ptr(user_data) };
let specifier_c: &CStr = unsafe { CStr::from_ptr(specifier_ptr) };
let specifier: &str = specifier_c.to_str().unwrap();
let referrer_c: &CStr = unsafe { CStr::from_ptr(referrer_ptr) };
let referrer: &str = referrer_c.to_str().unwrap();
debug!("module_resolve callback {} {}", specifier, referrer);
let isolate = unsafe { Isolate::from_raw_ptr(user_data) };
let maybe_out =
code_fetch_and_maybe_compile(&isolate.state, specifier, referrer);
if maybe_out.is_err() {
// Resolution failure
return;
}
let out = maybe_out.unwrap();
let filename = CString::new(out.filename.clone()).unwrap();
let filename_ptr = filename.as_ptr() as *const i8;
let js_source = CString::new(out.js_source().clone()).unwrap();
let js_source_ptr = js_source.as_ptr() as *const i8;
unsafe {
libdeno::deno_resolve_ok(
isolate.libdeno_isolate,
filename_ptr,
js_source_ptr,
)
};
return isolate.resolve_cb(specifier, referrer);
}
// Dereferences the C pointer into the Rust Isolate object.
@ -673,12 +779,37 @@ mod tests {
let state = Arc::new(IsolateState::new(flags, rest_argv, None));
let snapshot = libdeno::deno_buf::empty();
let isolate = Isolate::new(snapshot, state, dispatch_sync);
let mut isolate = Isolate::new(snapshot, state, dispatch_sync);
tokio_util::init(|| {
isolate
.execute_mod(filename, false)
.expect("execute_mod error");
isolate.event_loop().ok();
});
let metrics = &isolate.state.metrics;
assert_eq!(metrics.resolve_count.load(Ordering::SeqCst), 1);
}
#[test]
fn execute_mod_circular() {
let filename = std::env::current_dir().unwrap().join("tests/circular1.js");
let filename = filename.to_str().unwrap();
let argv = vec![String::from("./deno"), String::from(filename)];
let (flags, rest_argv, _) = flags::set_flags(argv).unwrap();
let state = Arc::new(IsolateState::new(flags, rest_argv, None));
let snapshot = libdeno::deno_buf::empty();
let mut isolate = Isolate::new(snapshot, state, dispatch_sync);
tokio_util::init(|| {
isolate
.execute_mod(filename, false)
.expect("execute_mod error");
isolate.event_loop().ok();
});
let metrics = &isolate.state.metrics;
assert_eq!(metrics.resolve_count.load(Ordering::SeqCst), 2);
}
}

45
src/libdeno.rs
View file

@ -2,6 +2,7 @@
use libc::c_char;
use libc::c_int;
use libc::c_void;
use libc::size_t;
use std::ops::{Deref, DerefMut};
use std::ptr::null;
@ -110,12 +111,15 @@ type deno_recv_cb = unsafe extern "C" fn(
data_buf: deno_buf,
);
#[allow(non_camel_case_types)]
pub type deno_mod = i32;
#[allow(non_camel_case_types)]
type deno_resolve_cb = unsafe extern "C" fn(
user_data: *mut c_void,
specifier: *const c_char,
referrer: *const c_char,
);
referrer: deno_mod,
) -> deno_mod;
#[repr(C)]
pub struct deno_config {
@ -123,7 +127,6 @@ pub struct deno_config {
pub load_snapshot: deno_buf,
pub shared: deno_buf,
pub recv_cb: deno_recv_cb,
pub resolve_cb: deno_resolve_cb,
}
extern "C" {
@ -146,16 +149,34 @@ extern "C" {
js_filename: *const c_char,
js_source: *const c_char,
) -> c_int;
pub fn deno_execute_mod(
// Modules
pub fn deno_mod_new(
i: *const isolate,
name: *const c_char,
source: *const c_char,
) -> deno_mod;
pub fn deno_mod_imports_len(i: *const isolate, id: deno_mod) -> size_t;
pub fn deno_mod_imports_get(
i: *const isolate,
id: deno_mod,
index: size_t,
) -> *const c_char;
pub fn deno_mod_instantiate(
i: *const isolate,
user_data: *const c_void,
js_filename: *const c_char,
js_source: *const c_char,
resolve_only: i32,
) -> c_int;
pub fn deno_resolve_ok(
i: *const isolate,
js_filename: *const c_char,
js_source: *const c_char,
id: deno_mod,
resolve_cb: deno_resolve_cb,
);
pub fn deno_mod_evaluate(
i: *const isolate,
user_data: *const c_void,
id: deno_mod,
);
}

6
src/main.rs
View file

@ -84,7 +84,7 @@ fn main() {
let state = Arc::new(isolate::IsolateState::new(flags, rest_argv, None));
let snapshot = snapshot::deno_snapshot();
let isolate = isolate::Isolate::new(snapshot, state, ops::dispatch);
let mut isolate = isolate::Isolate::new(snapshot, state, ops::dispatch);
tokio_util::init(|| {
// Setup runtime.
@ -94,9 +94,9 @@ fn main() {
// Execute input file.
if isolate.state.argv.len() > 1 {
let input_filename = &isolate.state.argv[1];
let input_filename = isolate.state.argv[1].clone();
isolate
.execute_mod(input_filename, should_prefetch)
.execute_mod(&input_filename, should_prefetch)
.unwrap_or_else(print_err_and_exit);
}

2
tests/circular1.js Normal file
View file

@ -0,0 +1,2 @@
import "circular2.js";
console.log("circular1");

2
tests/circular1.js.out Normal file
View file

@ -0,0 +1,2 @@
circular2
circular1

2
tests/circular1.test Normal file
View file

@ -0,0 +1,2 @@
args: tests/circular1.js --reload
output: tests/circular1.js.out

2
tests/circular2.js Normal file
View file

@ -0,0 +1,2 @@
import "circular1.js";
console.log("circular2");

2
tests/error_009_missing_js_module.js.out
View file

@ -1 +1 @@
Uncaught NotFound: Cannot resolve module "./bad-module.js" from "[WILDCARD]/tests/error_009_missing_js_module.js"
Uncaught Cannot resolve module "./bad-module.js" from "[WILDCARD]error_009_missing_js_module.js"

3
tests/imports_meta.js Normal file
View file

@ -0,0 +1,3 @@
console.log("imports_meta", import.meta.url);
import "imports_meta2.js";

2
tests/imports_meta.js.out Normal file
View file

@ -0,0 +1,2 @@
imports_meta2 [WILDCARD]imports_meta2.js
imports_meta [WILDCARD]imports_meta.js

2
tests/imports_meta.test Normal file
View file

@ -0,0 +1,2 @@
args: tests/imports_meta.js --reload
output: tests/imports_meta.js.out

1
tests/imports_meta2.js Normal file
View file

@ -0,0 +1 @@
console.log("imports_meta2", import.meta.url);