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src: Handle NULL env scenario #31899

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8069174
src: Handle NULL env scenario
HarshithaKP Feb 21, 2020
a2b8310
fixup: address review comment
HarshithaKP Mar 5, 2020
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7 changes: 7 additions & 0 deletions doc/api/errors.md
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Expand Up@@ -889,6 +889,13 @@ provided.
Encoding provided to `TextDecoder()` API was not one of the
[WHATWG Supported Encodings][].

<a id="ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE"></a>
### `ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE`

The JS execution context is not associated with a Node.js environment.
This may occur when Node.js is used as an embedded library and some hooks
for the JS engine are not set up properly.

<a id="ERR_FALSY_VALUE_REJECTION"></a>
### `ERR_FALSY_VALUE_REJECTION`

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13 changes: 11 additions & 2 deletions src/module_wrap.cc
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Expand Up@@ -451,7 +451,12 @@ MaybeLocal<Module> ModuleWrap::ResolveCallback(Local<Context> context,
Local<String> specifier,
Local<Module> referrer){
Environment* env = Environment::GetCurrent(context);
CHECK_NOT_NULL(env); // TODO(addaleax): Handle nullptr here.
if (env == nullptr){
Isolate* isolate = context->GetIsolate();
THROW_ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE(isolate);
return MaybeLocal<Module>();
}

Isolate* isolate = env->isolate();

ModuleWrap* dependent = GetFromModule(env, referrer);
Expand DownExpand Up@@ -1443,7 +1448,11 @@ static MaybeLocal<Promise> ImportModuleDynamically(
Local<String> specifier){
Isolate* iso = context->GetIsolate();
Environment* env = Environment::GetCurrent(context);
CHECK_NOT_NULL(env); // TODO(addaleax): Handle nullptr here.
if (env == nullptr){
THROW_ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE(iso);
return MaybeLocal<Promise>();
}

EscapableHandleScope handle_scope(iso);

Local<Function> import_callback =
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47 changes: 25 additions & 22 deletions src/node_errors.h
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Expand Up@@ -39,6 +39,7 @@ void OnFatalError(const char* location, const char* message);
V(ERR_CONSTRUCT_CALL_INVALID, TypeError) \
V(ERR_CRYPTO_UNKNOWN_CIPHER, Error) \
V(ERR_CRYPTO_UNKNOWN_DH_GROUP, Error) \
V(ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE, Error) \
V(ERR_INVALID_ARG_VALUE, TypeError) \
V(ERR_OSSL_EVP_INVALID_DIGEST, Error) \
V(ERR_INVALID_ARG_TYPE, TypeError) \
Expand DownExpand Up@@ -86,28 +87,30 @@ void OnFatalError(const char* location, const char* message);

// Errors with predefined static messages

#define PREDEFINED_ERROR_MESSAGES(V) \
V(ERR_BUFFER_CONTEXT_NOT_AVAILABLE, \
"Buffer is not available for the current Context") \
V(ERR_CONSTRUCT_CALL_INVALID, "Constructor cannot be called") \
V(ERR_CONSTRUCT_CALL_REQUIRED, "Cannot call constructor without `new`") \
V(ERR_CRYPTO_UNKNOWN_CIPHER, "Unknown cipher") \
V(ERR_CRYPTO_UNKNOWN_DH_GROUP, "Unknown DH group") \
V(ERR_INVALID_TRANSFER_OBJECT, "Found invalid object in transferList") \
V(ERR_MEMORY_ALLOCATION_FAILED, "Failed to allocate memory") \
V(ERR_OSSL_EVP_INVALID_DIGEST, "Invalid digest used") \
V(ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST, \
"MessagePort was found in message but not listed in transferList") \
V(ERR_MISSING_PLATFORM_FOR_WORKER, \
"The V8 platform used by this instance of Node does not support " \
"creating Workers") \
V(ERR_NON_CONTEXT_AWARE_DISABLED, \
"Loading non context-aware native modules has been disabled") \
V(ERR_SCRIPT_EXECUTION_INTERRUPTED, \
"Script execution was interrupted by `SIGINT`") \
V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER, \
"Cannot serialize externalized SharedArrayBuffer") \
V(ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED, "Failed to set PSK identity hint") \
#define PREDEFINED_ERROR_MESSAGES(V) \
V(ERR_BUFFER_CONTEXT_NOT_AVAILABLE, \
"Buffer is not available for the current Context") \
V(ERR_CONSTRUCT_CALL_INVALID, "Constructor cannot be called") \
V(ERR_CONSTRUCT_CALL_REQUIRED, "Cannot call constructor without `new`") \
V(ERR_CRYPTO_UNKNOWN_CIPHER, "Unknown cipher") \
V(ERR_CRYPTO_UNKNOWN_DH_GROUP, "Unknown DH group") \
V(ERR_EXECUTION_ENVIRONMENT_NOT_AVAILABLE, \
"Context not associated with Node.js environment") \
V(ERR_INVALID_TRANSFER_OBJECT, "Found invalid object in transferList") \
V(ERR_MEMORY_ALLOCATION_FAILED, "Failed to allocate memory") \
V(ERR_OSSL_EVP_INVALID_DIGEST, "Invalid digest used") \
V(ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST, \
"MessagePort was found in message but not listed in transferList") \
V(ERR_MISSING_PLATFORM_FOR_WORKER, \
"The V8 platform used by this instance of Node does not support " \
"creating Workers") \
V(ERR_NON_CONTEXT_AWARE_DISABLED, \
"Loading non context-aware native modules has been disabled") \
V(ERR_SCRIPT_EXECUTION_INTERRUPTED, \
"Script execution was interrupted by `SIGINT`") \
V(ERR_TRANSFERRING_EXTERNALIZED_SHAREDARRAYBUFFER, \
"Cannot serialize externalized SharedArrayBuffer") \
V(ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED, "Failed to set PSK identity hint")

#define V(code, message) \
inline v8::Local<v8::Value> code(v8::Isolate* isolate){\
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