blob: 8e27dc09232b1bc2927d270085b712c4d9338a83 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "bin/builtin.h"
#include "bin/utils.h"
#include "include/dart_debugger_api.h"
#include "platform/globals.h"
#include "platform/json.h"
#include "platform/thread.h"
namespace dart {
namespace bin {
// TODO(hausner): Need better error handling.
#define ASSERT_NOT_ERROR(handle) \
#define RETURN_IF_ERROR(handle) \
if (Dart_IsError(handle)) { \
return Dart_GetError(handle); \
// Class to parse a JSON debug command message.
class MessageParser {
MessageParser(const char* buf, int buf_length)
: buf_(buf), buf_length_(buf_length) {
~MessageParser() { }
// Accessors.
const char* buf() const { return buf_; }
bool IsValidMessage() const;
int MessageId() const;
const char* Params() const;
bool HasParam(const char* name) const;
intptr_t GetIntParam(const char* name) const;
int64_t GetInt64Param(const char* name) const;
intptr_t GetOptIntParam(const char* name, intptr_t default_val) const;
// GetStringParam mallocs the buffer that it returns. Caller must free.
char* GetStringParam(const char* name) const;
const char* buf_;
int buf_length_;
// Class which represents a debug command message and handles it.
class DbgMessage {
DbgMessage(int32_t cmd_idx, const char* start,
const char* end, intptr_t debug_fd)
: next_(NULL), cmd_idx_(cmd_idx),
buffer_(NULL), buffer_len_(end - start),
debug_fd_(debug_fd) {
buffer_ = reinterpret_cast<char*>(malloc(buffer_len_));
ASSERT(buffer_ != NULL);
memmove(buffer_, start, buffer_len_);
~DbgMessage() {
next_ = NULL;
// Accessors.
DbgMessage* next() const { return next_; }
void set_next(DbgMessage* next) { next_ = next; }
char* buffer() const { return buffer_; }
int32_t buffer_len() const { return buffer_len_; }
intptr_t debug_fd() const { return debug_fd_; }
// Handle debugger command message.
// Returns true if the execution needs to resume after this message is
// handled, false otherwise.
bool HandleMessage();
// Send reply after successful handling of command.
void SendReply(dart::TextBuffer* msg);
// Reply error returned by the command handler.
void SendErrorReply(int msg_id, const char* err_msg);
// Handlers for specific commands, they are static because these
// functions are populated as function pointers into a dispatch table.
static bool HandleResumeCmd(DbgMessage* msg);
static bool HandleStepIntoCmd(DbgMessage* msg);
static bool HandleStepOverCmd(DbgMessage* msg);
static bool HandleStepOutCmd(DbgMessage* msg);
static bool HandleGetLibrariesCmd(DbgMessage* msg);
static bool HandleGetClassPropsCmd(DbgMessage* msg);
static bool HandleGetLibPropsCmd(DbgMessage* msg);
static bool HandleSetLibPropsCmd(DbgMessage* msg);
static bool HandleGetGlobalsCmd(DbgMessage* msg);
static bool HandleEvaluateExprCmd(DbgMessage* msg);
static bool HandleGetObjPropsCmd(DbgMessage* msg);
static bool HandleGetListCmd(DbgMessage* msg);
static bool HandleGetScriptURLsCmd(DbgMessage* msg);
static bool HandleGetSourceCmd(DbgMessage* msg);
static bool HandleGetLineNumbersCmd(DbgMessage* msg);
static bool HandleGetStackTraceCmd(DbgMessage* msg);
static bool HandlePauseOnExcCmd(DbgMessage* msg);
static bool HandleSetBpCmd(DbgMessage* msg);
static bool HandleRemBpCmd(DbgMessage* msg);
DbgMessage* next_; // Next message in the queue.
int32_t cmd_idx_; // Isolate specific debugger command index.
char* buffer_; // Debugger command message.
int32_t buffer_len_; // Length of the debugger command message.
intptr_t debug_fd_; // Debugger connection on which replies are to be sent.
// Class which represents a queue of debug command messages sent to an isolate.
class DbgMsgQueue {
DbgMsgQueue(Dart_IsolateId isolate_id, DbgMsgQueue* next)
: is_running_(true),
next_(next) {
~DbgMsgQueue() {
DbgMessage* msg = msglist_head_;
while (msglist_head_ != NULL) {
msglist_head_ = msglist_head_->next();
delete msg;
msg = msglist_head_;
msglist_tail_ = NULL;
isolate_id_ = ILLEGAL_ISOLATE_ID;
next_ = NULL;
// Accessors.
Dart_IsolateId isolate_id() const { return isolate_id_; }
DbgMsgQueue* next() const { return next_; }
void set_next(DbgMsgQueue* next) { next_ = next; }
// Add specified debug command message to the queue.
void AddMessage(int32_t cmd_idx,
const char* start,
const char* end,
intptr_t debug_fd);
// Notify an isolate of a pending vmservice message.
void Notify();
// Run a message loop which handles messages as they arrive until
// normal program execution resumes.
void MessageLoop();
// Handle any pending debug command messages in the queue. Return
// value indicates whether a resume has been requested.
bool HandlePendingMessages();
// Interrupt Isolate.
void InterruptIsolate();
// Queue output messages, these are sent out when we hit an event.
void QueueOutputMsg(dart::TextBuffer* msg);
// Send all queued messages over to the debugger.
void SendQueuedMsgs();
// Send breakpoint event message over to the debugger.
void SendBreakpointEvent(intptr_t bp_id, const Dart_CodeLocation& location);
// Send Exception event message over to the debugger.
void SendExceptionEvent(Dart_Handle exception, Dart_StackTrace trace);
// Send Isolate event message over to the debugger.
void SendIsolateEvent(Dart_IsolateId isolate_id, Dart_IsolateEvent kind);
bool is_running_; // True if isolate is running and not in the debugger loop.
bool is_interrupted_; // True if interrupt command is pending.
DbgMessage* msglist_head_; // Start of debugger messages list.
DbgMessage* msglist_tail_; // End of debugger messages list.
// Text buffer that accumulates messages to be output.
dart::TextBuffer queued_output_messages_;
Dart_IsolateId isolate_id_; // Id of the isolate tied to this queue.
DbgMsgQueue* next_; // Used for creating a list of message queues.
// The isolate waits on this condition variable when it needs to process
// debug messages.
dart::Monitor msg_queue_lock_;
// Maintains a list of message queues.
class DbgMsgQueueList {
static const int32_t kInvalidCommand = -1;
// Initialize the message queue processing by setting up the appropriate
// handlers.
static void Initialize();
// Parses the input message and returns the command index if the message
// contains a valid isolate specific command.
// It returns kInvalidCommand otherwise.
static int32_t LookupIsolateCommand(const char* buf, int32_t buflen);
// Queue debugger message targetted for the isolate.
static bool AddIsolateMessage(Dart_IsolateId isolate_id,
int32_t cmd_idx,
const char* start,
const char* end,
intptr_t debug_fd);
// Notify an isolate of a pending vmservice message.
static void NotifyIsolate(Dart_Isolate isolate);
// Interrupt isolate.
static bool InterruptIsolate(Dart_IsolateId isolate_id);
// Add Debugger Message Queue corresponding to the Isolate.
static DbgMsgQueue* AddIsolateMsgQueue(Dart_IsolateId isolate_id);
// Get Debugger Message Queue corresponding to the Isolate.
static DbgMsgQueue* GetIsolateMsgQueue(Dart_IsolateId isolate_id);
// Remove Debugger Message Queue corresponding to the Isolate.
static void RemoveIsolateMsgQueue(Dart_IsolateId isolate_id);
// Generic handlers for breakpoints, exceptions and delayed breakpoint
// resolution.
static void BptResolvedHandler(Dart_IsolateId isolate_id,
intptr_t bp_id,
const Dart_CodeLocation& location);
static void PausedEventHandler(Dart_IsolateId isolate_id,
intptr_t bp_id,
const Dart_CodeLocation& loc);
static void ExceptionThrownHandler(Dart_IsolateId isolate_id,
Dart_Handle exception,
Dart_StackTrace stack_trace);
static void IsolateEventHandler(Dart_IsolateId isolate_id,
Dart_IsolateEvent kind);
// Print list of isolate ids of all message queues into text buffer.
static void ListIsolateIds(dart::TextBuffer* msg);
static DbgMsgQueue* GetIsolateMsgQueueLocked(Dart_IsolateId isolate_id);
static DbgMsgQueue* list_;
static dart::Mutex* msg_queue_list_lock_;
} // namespace bin
} // namespace dart
#endif // BIN_DBG_MESSAGE_H_