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llvm-project/lldb/tools/lldb-vscode/lldb-vscode.cpp

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//===-- lldb-vscode.cpp -----------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <assert.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#if defined(_WIN32)
// We need to #define NOMINMAX in order to skip `min()` and `max()` macro
// definitions that conflict with other system headers.
// We also need to #undef GetObject (which is defined to GetObjectW) because
// the JSON code we use also has methods named `GetObject()` and we conflict
// against these.
#define NOMINMAX
#include <windows.h>
#undef GetObject
#else
#include <netinet/in.h>
#include <sys/socket.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <chrono>
#include <fstream>
#include <map>
#include <memory>
#include <mutex>
#include <set>
#include <sstream>
#include <thread>
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "JSONUtils.h"
#include "LLDBUtils.h"
#include "VSCode.h"
#if defined(_WIN32)
#define PATH_MAX MAX_PATH
typedef int socklen_t;
constexpr const char *dev_null_path = "nul";
#else
typedef int SOCKET;
constexpr const char *dev_null_path = "/dev/null";
#endif
using namespace lldb_vscode;
namespace {
typedef void (*RequestCallback)(const llvm::json::Object &command);
enum LaunchMethod { Launch, Attach, AttachForSuspendedLaunch };
enum VSCodeBroadcasterBits { eBroadcastBitStopEventThread = 1u << 0 };
int AcceptConnection(int portno) {
// Accept a socket connection from any host on "portno".
int newsockfd = -1;
struct sockaddr_in serv_addr, cli_addr;
SOCKET sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) {
if (g_vsc.log)
*g_vsc.log << "error: opening socket (" << strerror(errno) << ")"
<< std::endl;
} else {
memset((char *)&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
// serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
serv_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
serv_addr.sin_port = htons(portno);
if (bind(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
if (g_vsc.log)
*g_vsc.log << "error: binding socket (" << strerror(errno) << ")"
<< std::endl;
} else {
listen(sockfd, 5);
socklen_t clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr *)&cli_addr, &clilen);
if (newsockfd < 0)
if (g_vsc.log)
*g_vsc.log << "error: accept (" << strerror(errno) << ")"
<< std::endl;
}
#if defined(_WIN32)
closesocket(sockfd);
#else
close(sockfd);
#endif
}
return newsockfd;
}
std::vector<const char *> MakeArgv(const llvm::ArrayRef<std::string> &strs) {
// Create and return an array of "const char *", one for each C string in
// "strs" and terminate the list with a NULL. This can be used for argument
// vectors (argv) or environment vectors (envp) like those passed to the
// "main" function in C programs.
std::vector<const char *> argv;
for (const auto &s : strs)
argv.push_back(s.c_str());
argv.push_back(nullptr);
return argv;
}
//----------------------------------------------------------------------
// Send a "exited" event to indicate the process has exited.
//----------------------------------------------------------------------
void SendProcessExitedEvent(lldb::SBProcess &process) {
llvm::json::Object event(CreateEventObject("exited"));
llvm::json::Object body;
body.try_emplace("exitCode", (int64_t)process.GetExitStatus());
event.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(event)));
}
void SendThreadExitedEvent(lldb::tid_t tid) {
llvm::json::Object event(CreateEventObject("thread"));
llvm::json::Object body;
body.try_emplace("reason", "exited");
body.try_emplace("threadId", (int64_t)tid);
event.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(event)));
}
//----------------------------------------------------------------------
// Send a "terminated" event to indicate the process is done being
// debugged.
//----------------------------------------------------------------------
void SendTerminatedEvent() {
if (!g_vsc.sent_terminated_event) {
g_vsc.sent_terminated_event = true;
// Send a "terminated" event
llvm::json::Object event(CreateEventObject("terminated"));
g_vsc.SendJSON(llvm::json::Value(std::move(event)));
}
}
//----------------------------------------------------------------------
// Send a thread stopped event for all threads as long as the process
// is stopped.
//----------------------------------------------------------------------
void SendThreadStoppedEvent() {
lldb::SBProcess process = g_vsc.target.GetProcess();
if (process.IsValid()) {
auto state = process.GetState();
if (state == lldb::eStateStopped) {
llvm::DenseSet<lldb::tid_t> old_thread_ids;
old_thread_ids.swap(g_vsc.thread_ids);
uint32_t stop_id = process.GetStopID();
const uint32_t num_threads = process.GetNumThreads();
// First make a pass through the threads to see if the focused thread
// has a stop reason. In case the focus thread doesn't have a stop
// reason, remember the first thread that has a stop reason so we can
// set it as the focus thread if below if needed.
lldb::tid_t first_tid_with_reason = LLDB_INVALID_THREAD_ID;
uint32_t num_threads_with_reason = 0;
for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx) {
lldb::SBThread thread = process.GetThreadAtIndex(thread_idx);
const lldb::tid_t tid = thread.GetThreadID();
const bool has_reason = ThreadHasStopReason(thread);
// If the focus thread doesn't have a stop reason, clear the thread ID
if (tid == g_vsc.focus_tid && !has_reason)
g_vsc.focus_tid = LLDB_INVALID_THREAD_ID;
if (has_reason) {
++num_threads_with_reason;
if (first_tid_with_reason == LLDB_INVALID_THREAD_ID)
first_tid_with_reason = tid;
}
}
// We will have cleared g_vsc.focus_tid if he focus thread doesn't
// have a stop reason, so if it was cleared, or wasn't set, then set the
// focus thread to the first thread with a stop reason.
if (g_vsc.focus_tid == LLDB_INVALID_THREAD_ID)
g_vsc.focus_tid = first_tid_with_reason;
// If no threads stopped with a reason, then report the first one so
// we at least let the UI know we stopped.
if (num_threads_with_reason == 0) {
lldb::SBThread thread = process.GetThreadAtIndex(0);
g_vsc.SendJSON(CreateThreadStopped(thread, stop_id));
} else {
for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx) {
lldb::SBThread thread = process.GetThreadAtIndex(thread_idx);
g_vsc.thread_ids.insert(thread.GetThreadID());
if (ThreadHasStopReason(thread)) {
g_vsc.SendJSON(CreateThreadStopped(thread, stop_id));
}
}
}
for (auto tid : old_thread_ids) {
auto end = g_vsc.thread_ids.end();
auto pos = g_vsc.thread_ids.find(tid);
if (pos == end)
SendThreadExitedEvent(tid);
}
} else {
if (g_vsc.log)
*g_vsc.log << "error: SendThreadStoppedEvent() when process"
" isn't stopped ("
<< lldb::SBDebugger::StateAsCString(state) << ')'
<< std::endl;
}
} else {
if (g_vsc.log)
*g_vsc.log << "error: SendThreadStoppedEvent() invalid process"
<< std::endl;
}
g_vsc.RunStopCommands();
}
//----------------------------------------------------------------------
// "ProcessEvent": {
// "allOf": [
// { "$ref": "#/definitions/Event" },
// {
// "type": "object",
// "description": "Event message for 'process' event type. The event
// indicates that the debugger has begun debugging a
// new process. Either one that it has launched, or one
// that it has attached to.",
// "properties": {
// "event": {
// "type": "string",
// "enum": [ "process" ]
// },
// "body": {
// "type": "object",
// "properties": {
// "name": {
// "type": "string",
// "description": "The logical name of the process. This is
// usually the full path to process's executable
// file. Example: /home/myproj/program.js."
// },
// "systemProcessId": {
// "type": "integer",
// "description": "The system process id of the debugged process.
// This property will be missing for non-system
// processes."
// },
// "isLocalProcess": {
// "type": "boolean",
// "description": "If true, the process is running on the same
// computer as the debug adapter."
// },
// "startMethod": {
// "type": "string",
// "enum": [ "launch", "attach", "attachForSuspendedLaunch" ],
// "description": "Describes how the debug engine started
// debugging this process.",
// "enumDescriptions": [
// "Process was launched under the debugger.",
// "Debugger attached to an existing process.",
// "A project launcher component has launched a new process in
// a suspended state and then asked the debugger to attach."
// ]
// }
// },
// "required": [ "name" ]
// }
// },
// "required": [ "event", "body" ]
// }
// ]
// }
//----------------------------------------------------------------------
void SendProcessEvent(LaunchMethod launch_method) {
lldb::SBFileSpec exe_fspec = g_vsc.target.GetExecutable();
char exe_path[PATH_MAX];
exe_fspec.GetPath(exe_path, sizeof(exe_path));
llvm::json::Object event(CreateEventObject("process"));
llvm::json::Object body;
EmplaceSafeString(body, "name", std::string(exe_path));
const auto pid = g_vsc.target.GetProcess().GetProcessID();
body.try_emplace("systemProcessId", (int64_t)pid);
body.try_emplace("isLocalProcess", true);
const char *startMethod = nullptr;
switch (launch_method) {
case Launch:
startMethod = "launch";
break;
case Attach:
startMethod = "attach";
break;
case AttachForSuspendedLaunch:
startMethod = "attachForSuspendedLaunch";
break;
}
body.try_emplace("startMethod", startMethod);
event.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(event)));
}
//----------------------------------------------------------------------
// Grab any STDOUT and STDERR from the process and send it up to VS Code
// via an "output" event to the "stdout" and "stderr" categories.
//----------------------------------------------------------------------
void SendStdOutStdErr(lldb::SBProcess &process) {
char buffer[1024];
size_t count;
while ((count = process.GetSTDOUT(buffer, sizeof(buffer))) > 0)
g_vsc.SendOutput(OutputType::Stdout, llvm::StringRef(buffer, count));
while ((count = process.GetSTDERR(buffer, sizeof(buffer))) > 0)
g_vsc.SendOutput(OutputType::Stderr, llvm::StringRef(buffer, count));
}
//----------------------------------------------------------------------
// All events from the debugger, target, process, thread and frames are
// received in this function that runs in its own thread. We are using a
// "FILE *" to output packets back to VS Code and they have mutexes in them
// them prevent multiple threads from writing simultaneously so no locking
// is required.
//----------------------------------------------------------------------
void EventThreadFunction() {
lldb::SBEvent event;
lldb::SBListener listener = g_vsc.debugger.GetListener();
bool done = false;
while (!done) {
if (listener.WaitForEvent(1, event)) {
const auto event_mask = event.GetType();
if (lldb::SBProcess::EventIsProcessEvent(event)) {
lldb::SBProcess process = lldb::SBProcess::GetProcessFromEvent(event);
if (event_mask & lldb::SBProcess::eBroadcastBitStateChanged) {
auto state = lldb::SBProcess::GetStateFromEvent(event);
switch (state) {
case lldb::eStateInvalid:
// Not a state event
break;
case lldb::eStateUnloaded:
break;
case lldb::eStateConnected:
break;
case lldb::eStateAttaching:
break;
case lldb::eStateLaunching:
break;
case lldb::eStateStepping:
break;
case lldb::eStateCrashed:
break;
case lldb::eStateDetached:
break;
case lldb::eStateSuspended:
break;
case lldb::eStateStopped:
// Only report a stopped event if the process was not restarted.
if (!lldb::SBProcess::GetRestartedFromEvent(event)) {
SendStdOutStdErr(process);
SendThreadStoppedEvent();
}
break;
case lldb::eStateRunning:
break;
case lldb::eStateExited: {
// Run any exit LLDB commands the user specified in the
// launch.json
g_vsc.RunExitCommands();
SendProcessExitedEvent(process);
SendTerminatedEvent();
done = true;
} break;
}
} else if ((event_mask & lldb::SBProcess::eBroadcastBitSTDOUT) ||
(event_mask & lldb::SBProcess::eBroadcastBitSTDERR)) {
SendStdOutStdErr(process);
}
} else if (lldb::SBBreakpoint::EventIsBreakpointEvent(event)) {
if (event_mask & lldb::SBTarget::eBroadcastBitBreakpointChanged) {
auto event_type =
lldb::SBBreakpoint::GetBreakpointEventTypeFromEvent(event);
const auto num_locs =
lldb::SBBreakpoint::GetNumBreakpointLocationsFromEvent(event);
auto bp = lldb::SBBreakpoint::GetBreakpointFromEvent(event);
bool added = event_type & lldb::eBreakpointEventTypeLocationsAdded;
bool removed =
event_type & lldb::eBreakpointEventTypeLocationsRemoved;
if (added || removed) {
for (size_t i = 0; i < num_locs; ++i) {
auto bp_loc =
lldb::SBBreakpoint::GetBreakpointLocationAtIndexFromEvent(
event, i);
auto bp_event = CreateEventObject("breakpoint");
llvm::json::Object body;
body.try_emplace("breakpoint", CreateBreakpoint(bp_loc));
if (added)
body.try_emplace("reason", "new");
else
body.try_emplace("reason", "removed");
bp_event.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(bp_event)));
}
}
}
} else if (event.BroadcasterMatchesRef(g_vsc.broadcaster)) {
if (event_mask & eBroadcastBitStopEventThread) {
done = true;
}
}
}
}
}
//----------------------------------------------------------------------
// Both attach and launch take a either a sourcePath or sourceMap
// argument (or neither), from which we need to set the target.source-map.
//----------------------------------------------------------------------
void SetSourceMapFromArguments(const llvm::json::Object &arguments) {
const char *sourceMapHelp =
"source must be be an array of two-element arrays, "
"each containing a source and replacement path string.\n";
std::string sourceMapCommand;
llvm::raw_string_ostream strm(sourceMapCommand);
strm << "settings set target.source-map ";
auto sourcePath = GetString(arguments, "sourcePath");
// sourceMap is the new, more general form of sourcePath and overrides it.
auto sourceMap = arguments.getArray("sourceMap");
if (sourceMap) {
for (const auto &value : *sourceMap) {
auto mapping = value.getAsArray();
if (mapping == nullptr || mapping->size() != 2 ||
(*mapping)[0].kind() != llvm::json::Value::String ||
(*mapping)[1].kind() != llvm::json::Value::String) {
g_vsc.SendOutput(OutputType::Console, llvm::StringRef(sourceMapHelp));
return;
}
auto mapFrom = GetAsString((*mapping)[0]);
auto mapTo = GetAsString((*mapping)[1]);
strm << "\"" << mapFrom << "\" \"" << mapTo << "\"";
}
} else {
if (ObjectContainsKey(arguments, "sourceMap")) {
g_vsc.SendOutput(OutputType::Console, llvm::StringRef(sourceMapHelp));
return;
}
if (sourcePath.empty())
return;
// Do any source remapping needed before we create our targets
strm << "\".\" \"" << sourcePath << "\"";
}
strm.flush();
if (!sourceMapCommand.empty()) {
g_vsc.RunLLDBCommands("Setting source map:", {sourceMapCommand});
}
}
//----------------------------------------------------------------------
// "AttachRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Attach request; value of command field is 'attach'.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "attach" ]
// },
// "arguments": {
// "$ref": "#/definitions/AttachRequestArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "AttachRequestArguments": {
// "type": "object",
// "description": "Arguments for 'attach' request.\nThe attach request has no
// standardized attributes."
// },
// "AttachResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'attach' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_attach(const llvm::json::Object &request) {
llvm::json::Object response;
lldb::SBError error;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
const lldb::pid_t pid =
GetUnsigned(arguments, "pid", LLDB_INVALID_PROCESS_ID);
if (pid != LLDB_INVALID_PROCESS_ID)
g_vsc.attach_info.SetProcessID(pid);
const auto wait_for = GetBoolean(arguments, "waitFor", false);
g_vsc.attach_info.SetWaitForLaunch(wait_for, false /*async*/);
g_vsc.init_commands = GetStrings(arguments, "initCommands");
g_vsc.pre_run_commands = GetStrings(arguments, "preRunCommands");
g_vsc.stop_commands = GetStrings(arguments, "stopCommands");
g_vsc.exit_commands = GetStrings(arguments, "exitCommands");
auto attachCommands = GetStrings(arguments, "attachCommands");
g_vsc.stop_at_entry = GetBoolean(arguments, "stopOnEntry", false);
const auto debuggerRoot = GetString(arguments, "debuggerRoot");
// This is a hack for loading DWARF in .o files on Mac where the .o files
// in the debug map of the main executable have relative paths which require
// the lldb-vscode binary to have its working directory set to that relative
// root for the .o files in order to be able to load debug info.
if (!debuggerRoot.empty()) {
llvm::sys::fs::set_current_path(debuggerRoot.data());
}
// Run any initialize LLDB commands the user specified in the launch.json
g_vsc.RunInitCommands();
// Grab the name of the program we need to debug and set it as the first
// argument that will be passed to the program we will debug.
const auto program = GetString(arguments, "program");
if (!program.empty()) {
lldb::SBFileSpec program_fspec(program.data(), true /*resolve_path*/);
g_vsc.launch_info.SetExecutableFile(program_fspec,
false /*add_as_first_arg*/);
const char *target_triple = nullptr;
const char *uuid_cstr = nullptr;
// Stand alone debug info file if different from executable
const char *symfile = nullptr;
g_vsc.target.AddModule(program.data(), target_triple, uuid_cstr, symfile);
if (error.Fail()) {
response.try_emplace("success", false);
EmplaceSafeString(response, "message", std::string(error.GetCString()));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
return;
}
}
const bool detatchOnError = GetBoolean(arguments, "detachOnError", false);
g_vsc.launch_info.SetDetachOnError(detatchOnError);
// Run any pre run LLDB commands the user specified in the launch.json
g_vsc.RunPreRunCommands();
if (pid == LLDB_INVALID_PROCESS_ID && wait_for) {
char attach_info[256];
auto attach_info_len =
snprintf(attach_info, sizeof(attach_info),
"Waiting to attach to \"%s\"...", program.data());
g_vsc.SendOutput(OutputType::Console, llvm::StringRef(attach_info,
attach_info_len));
}
if (attachCommands.empty()) {
// No "attachCommands", just attach normally.
// Disable async events so the attach will be successful when we return from
// the launch call and the launch will happen synchronously
g_vsc.debugger.SetAsync(false);
g_vsc.target.Attach(g_vsc.attach_info, error);
// Reenable async events
g_vsc.debugger.SetAsync(true);
} else {
// We have "attachCommands" that are a set of commands that are expected
// to execute the commands after which a process should be created. If there
// is no valid process after running these commands, we have failed.
g_vsc.RunLLDBCommands("Running attachCommands:", attachCommands);
// The custom commands might have created a new target so we should use the
// selected target after these commands are run.
g_vsc.target = g_vsc.debugger.GetSelectedTarget();
}
SetSourceMapFromArguments(*arguments);
if (error.Success()) {
auto attached_pid = g_vsc.target.GetProcess().GetProcessID();
if (attached_pid == LLDB_INVALID_PROCESS_ID) {
if (attachCommands.empty())
error.SetErrorString("failed to attach to a process");
else
error.SetErrorString("attachCommands failed to attach to a process");
}
}
if (error.Fail()) {
response.try_emplace("success", false);
EmplaceSafeString(response, "message", std::string(error.GetCString()));
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
if (error.Success()) {
SendProcessEvent(Attach);
g_vsc.SendJSON(CreateEventObject("initialized"));
// SendThreadStoppedEvent();
}
}
//----------------------------------------------------------------------
// "ContinueRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Continue request; value of command field is 'continue'.
// The request starts the debuggee to run again.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "continue" ]
// },
// "arguments": {
// "$ref": "#/definitions/ContinueArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "ContinueArguments": {
// "type": "object",
// "description": "Arguments for 'continue' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Continue execution for the specified thread (if
// possible). If the backend cannot continue on a single
// thread but will continue on all threads, it should
// set the allThreadsContinued attribute in the response
// to true."
// }
// },
// "required": [ "threadId" ]
// },
// "ContinueResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'continue' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "allThreadsContinued": {
// "type": "boolean",
// "description": "If true, the continue request has ignored the
// specified thread and continued all threads
// instead. If this attribute is missing a value
// of 'true' is assumed for backward
// compatibility."
// }
// }
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_continue(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
lldb::SBProcess process = g_vsc.target.GetProcess();
auto arguments = request.getObject("arguments");
// Remember the thread ID that caused the resume so we can set the
// "threadCausedFocus" boolean value in the "stopped" events.
g_vsc.focus_tid = GetUnsigned(arguments, "threadId", LLDB_INVALID_THREAD_ID);
lldb::SBError error = process.Continue();
llvm::json::Object body;
body.try_emplace("allThreadsContinued", true);
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "ConfigurationDoneRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "ConfigurationDone request; value of command field
// is 'configurationDone'.\nThe client of the debug protocol must
// send this request at the end of the sequence of configuration
// requests (which was started by the InitializedEvent).",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "configurationDone" ]
// },
// "arguments": {
// "$ref": "#/definitions/ConfigurationDoneArguments"
// }
// },
// "required": [ "command" ]
// }]
// },
// "ConfigurationDoneArguments": {
// "type": "object",
// "description": "Arguments for 'configurationDone' request.\nThe
// configurationDone request has no standardized attributes."
// },
// "ConfigurationDoneResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'configurationDone' request. This is
// just an acknowledgement, so no body field is required."
// }]
// },
//----------------------------------------------------------------------
void request_configurationDone(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
if (g_vsc.stop_at_entry)
SendThreadStoppedEvent();
else
g_vsc.target.GetProcess().Continue();
}
//----------------------------------------------------------------------
// "DisconnectRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Disconnect request; value of command field is
// 'disconnect'.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "disconnect" ]
// },
// "arguments": {
// "$ref": "#/definitions/DisconnectArguments"
// }
// },
// "required": [ "command" ]
// }]
// },
// "DisconnectArguments": {
// "type": "object",
// "description": "Arguments for 'disconnect' request.",
// "properties": {
// "terminateDebuggee": {
// "type": "boolean",
// "description": "Indicates whether the debuggee should be terminated
// when the debugger is disconnected. If unspecified,
// the debug adapter is free to do whatever it thinks
// is best. A client can only rely on this attribute
// being properly honored if a debug adapter returns
// true for the 'supportTerminateDebuggee' capability."
// },
// "restart": {
// "type": "boolean",
// "description": "Indicates whether the debuggee should be restart
// the process."
// }
// }
// },
// "DisconnectResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'disconnect' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_disconnect(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
bool terminateDebuggee = GetBoolean(arguments, "terminateDebuggee", false);
lldb::SBProcess process = g_vsc.target.GetProcess();
auto state = process.GetState();
switch (state) {
case lldb::eStateInvalid:
case lldb::eStateUnloaded:
case lldb::eStateDetached:
case lldb::eStateExited:
break;
case lldb::eStateConnected:
case lldb::eStateAttaching:
case lldb::eStateLaunching:
case lldb::eStateStepping:
case lldb::eStateCrashed:
case lldb::eStateSuspended:
case lldb::eStateStopped:
case lldb::eStateRunning:
g_vsc.debugger.SetAsync(false);
if (terminateDebuggee)
process.Kill();
else
process.Detach();
g_vsc.debugger.SetAsync(true);
break;
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
SendTerminatedEvent();
if (g_vsc.event_thread.joinable()) {
g_vsc.broadcaster.BroadcastEventByType(eBroadcastBitStopEventThread);
g_vsc.event_thread.join();
}
}
void request_exceptionInfo(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
llvm::json::Object body;
lldb::SBThread thread = g_vsc.GetLLDBThread(*arguments);
if (thread.IsValid()) {
auto stopReason = thread.GetStopReason();
if (stopReason == lldb::eStopReasonSignal)
body.try_emplace("exceptionId", "signal");
else if (stopReason == lldb::eStopReasonBreakpoint) {
ExceptionBreakpoint *exc_bp = g_vsc.GetExceptionBPFromStopReason(thread);
if (exc_bp) {
EmplaceSafeString(body, "exceptionId", exc_bp->filter);
EmplaceSafeString(body, "description", exc_bp->label);
} else {
body.try_emplace("exceptionId", "exception");
}
} else {
body.try_emplace("exceptionId", "exception");
}
if (!ObjectContainsKey(body, "description")) {
char description[1024];
if (thread.GetStopDescription(description, sizeof(description))) {
EmplaceSafeString(body, "description", std::string(description));
}
}
body.try_emplace("breakMode", "always");
// auto excInfoCount = thread.GetStopReasonDataCount();
// for (auto i=0; i<excInfoCount; ++i) {
// uint64_t exc_data = thread.GetStopReasonDataAtIndex(i);
// }
} else {
response.try_emplace("success", false);
}
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "EvaluateRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Evaluate request; value of command field is 'evaluate'.
// Evaluates the given expression in the context of the
// top most stack frame. The expression has access to any
// variables and arguments that are in scope.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "evaluate" ]
// },
// "arguments": {
// "$ref": "#/definitions/EvaluateArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "EvaluateArguments": {
// "type": "object",
// "description": "Arguments for 'evaluate' request.",
// "properties": {
// "expression": {
// "type": "string",
// "description": "The expression to evaluate."
// },
// "frameId": {
// "type": "integer",
// "description": "Evaluate the expression in the scope of this stack
// frame. If not specified, the expression is evaluated
// in the global scope."
// },
// "context": {
// "type": "string",
// "_enum": [ "watch", "repl", "hover" ],
// "enumDescriptions": [
// "evaluate is run in a watch.",
// "evaluate is run from REPL console.",
// "evaluate is run from a data hover."
// ],
// "description": "The context in which the evaluate request is run."
// },
// "format": {
// "$ref": "#/definitions/ValueFormat",
// "description": "Specifies details on how to format the Evaluate
// result."
// }
// },
// "required": [ "expression" ]
// },
// "EvaluateResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'evaluate' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "result": {
// "type": "string",
// "description": "The result of the evaluate request."
// },
// "type": {
// "type": "string",
// "description": "The optional type of the evaluate result."
// },
// "presentationHint": {
// "$ref": "#/definitions/VariablePresentationHint",
// "description": "Properties of a evaluate result that can be
// used to determine how to render the result in
// the UI."
// },
// "variablesReference": {
// "type": "number",
// "description": "If variablesReference is > 0, the evaluate
// result is structured and its children can be
// retrieved by passing variablesReference to the
// VariablesRequest."
// },
// "namedVariables": {
// "type": "number",
// "description": "The number of named child variables. The
// client can use this optional information to
// present the variables in a paged UI and fetch
// them in chunks."
// },
// "indexedVariables": {
// "type": "number",
// "description": "The number of indexed child variables. The
// client can use this optional information to
// present the variables in a paged UI and fetch
// them in chunks."
// }
// },
// "required": [ "result", "variablesReference" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_evaluate(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Object body;
auto arguments = request.getObject("arguments");
lldb::SBFrame frame = g_vsc.GetLLDBFrame(*arguments);
const auto expression = GetString(arguments, "expression");
if (!expression.empty() && expression[0] == '`') {
auto result = RunLLDBCommands(llvm::StringRef(),
{expression.substr(1)});
EmplaceSafeString(body, "result", result);
body.try_emplace("variablesReference", (int64_t)0);
} else {
// Always try to get the answer from the local variables if possible. If
// this fails, then actually evaluate an expression using the expression
// parser. "frame variable" is more reliable than the expression parser in
// many cases and it is faster.
lldb::SBValue value = frame.GetValueForVariablePath(
expression.data(), lldb::eDynamicDontRunTarget);
if (value.GetError().Fail())
value = frame.EvaluateExpression(expression.data());
if (value.GetError().Fail()) {
response.try_emplace("success", false);
const char *error_cstr = value.GetError().GetCString();
if (error_cstr && error_cstr[0])
EmplaceSafeString(response, "message", std::string(error_cstr));
else
EmplaceSafeString(response, "message", "evaluate failed");
} else {
SetValueForKey(value, body, "result");
auto value_typename = value.GetType().GetDisplayTypeName();
EmplaceSafeString(body, "type", value_typename ? value_typename : NO_TYPENAME);
if (value.MightHaveChildren()) {
auto variablesReference = VARIDX_TO_VARREF(g_vsc.variables.GetSize());
g_vsc.variables.Append(value);
body.try_emplace("variablesReference", variablesReference);
} else {
body.try_emplace("variablesReference", (int64_t)0);
}
}
}
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "InitializeRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Initialize request; value of command field is
// 'initialize'.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "initialize" ]
// },
// "arguments": {
// "$ref": "#/definitions/InitializeRequestArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "InitializeRequestArguments": {
// "type": "object",
// "description": "Arguments for 'initialize' request.",
// "properties": {
// "clientID": {
// "type": "string",
// "description": "The ID of the (frontend) client using this adapter."
// },
// "adapterID": {
// "type": "string",
// "description": "The ID of the debug adapter."
// },
// "locale": {
// "type": "string",
// "description": "The ISO-639 locale of the (frontend) client using
// this adapter, e.g. en-US or de-CH."
// },
// "linesStartAt1": {
// "type": "boolean",
// "description": "If true all line numbers are 1-based (default)."
// },
// "columnsStartAt1": {
// "type": "boolean",
// "description": "If true all column numbers are 1-based (default)."
// },
// "pathFormat": {
// "type": "string",
// "_enum": [ "path", "uri" ],
// "description": "Determines in what format paths are specified. The
// default is 'path', which is the native format."
// },
// "supportsVariableType": {
// "type": "boolean",
// "description": "Client supports the optional type attribute for
// variables."
// },
// "supportsVariablePaging": {
// "type": "boolean",
// "description": "Client supports the paging of variables."
// },
// "supportsRunInTerminalRequest": {
// "type": "boolean",
// "description": "Client supports the runInTerminal request."
// }
// },
// "required": [ "adapterID" ]
// },
// "InitializeResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'initialize' request.",
// "properties": {
// "body": {
// "$ref": "#/definitions/Capabilities",
// "description": "The capabilities of this debug adapter."
// }
// }
// }]
// }
//----------------------------------------------------------------------
void request_initialize(const llvm::json::Object &request) {
g_vsc.debugger = lldb::SBDebugger::Create(true /*source_init_files*/);
// Create an empty target right away since we might get breakpoint requests
// before we are given an executable to launch in a "launch" request, or a
// executable when attaching to a process by process ID in a "attach"
// request.
FILE *out = fopen(dev_null_path, "w");
if (out) {
// Set the output and error file handles to redirect into nothing otherwise
// if any code in LLDB prints to the debugger file handles, the output and
// error file handles are initialized to STDOUT and STDERR and any output
// will kill our debug session.
g_vsc.debugger.SetOutputFileHandle(out, true);
g_vsc.debugger.SetErrorFileHandle(out, false);
}
g_vsc.target = g_vsc.debugger.CreateTarget(nullptr);
lldb::SBListener listener = g_vsc.debugger.GetListener();
listener.StartListeningForEvents(
g_vsc.target.GetBroadcaster(),
lldb::SBTarget::eBroadcastBitBreakpointChanged);
listener.StartListeningForEvents(g_vsc.broadcaster,
eBroadcastBitStopEventThread);
// Start our event thread so we can receive events from the debugger, target,
// process and more.
g_vsc.event_thread = std::thread(EventThreadFunction);
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Object body;
// The debug adapter supports the configurationDoneRequest.
body.try_emplace("supportsConfigurationDoneRequest", true);
// The debug adapter supports function breakpoints.
body.try_emplace("supportsFunctionBreakpoints", true);
// The debug adapter supports conditional breakpoints.
body.try_emplace("supportsConditionalBreakpoints", true);
// The debug adapter supports breakpoints that break execution after a
// specified number of hits.
body.try_emplace("supportsHitConditionalBreakpoints", true);
// The debug adapter supports a (side effect free) evaluate request for
// data hovers.
body.try_emplace("supportsEvaluateForHovers", true);
// Available filters or options for the setExceptionBreakpoints request.
llvm::json::Array filters;
for (const auto &exc_bp : g_vsc.exception_breakpoints) {
filters.emplace_back(CreateExceptionBreakpointFilter(exc_bp));
}
body.try_emplace("exceptionBreakpointFilters", std::move(filters));
// The debug adapter supports stepping back via the stepBack and
// reverseContinue requests.
body.try_emplace("supportsStepBack", false);
// The debug adapter supports setting a variable to a value.
body.try_emplace("supportsSetVariable", true);
// The debug adapter supports restarting a frame.
body.try_emplace("supportsRestartFrame", false);
// The debug adapter supports the gotoTargetsRequest.
body.try_emplace("supportsGotoTargetsRequest", false);
// The debug adapter supports the stepInTargetsRequest.
body.try_emplace("supportsStepInTargetsRequest", false);
// The debug adapter supports the completionsRequest.
body.try_emplace("supportsCompletionsRequest", false);
// The debug adapter supports the modules request.
body.try_emplace("supportsModulesRequest", false);
// The set of additional module information exposed by the debug adapter.
// body.try_emplace("additionalModuleColumns"] = ColumnDescriptor
// Checksum algorithms supported by the debug adapter.
// body.try_emplace("supportedChecksumAlgorithms"] = ChecksumAlgorithm
// The debug adapter supports the RestartRequest. In this case a client
// should not implement 'restart' by terminating and relaunching the adapter
// but by calling the RestartRequest.
body.try_emplace("supportsRestartRequest", false);
// The debug adapter supports 'exceptionOptions' on the
// setExceptionBreakpoints request.
body.try_emplace("supportsExceptionOptions", true);
// The debug adapter supports a 'format' attribute on the stackTraceRequest,
// variablesRequest, and evaluateRequest.
body.try_emplace("supportsValueFormattingOptions", true);
// The debug adapter supports the exceptionInfo request.
body.try_emplace("supportsExceptionInfoRequest", true);
// The debug adapter supports the 'terminateDebuggee' attribute on the
// 'disconnect' request.
body.try_emplace("supportTerminateDebuggee", true);
// The debug adapter supports the delayed loading of parts of the stack,
// which requires that both the 'startFrame' and 'levels' arguments and the
// 'totalFrames' result of the 'StackTrace' request are supported.
body.try_emplace("supportsDelayedStackTraceLoading", true);
// The debug adapter supports the 'loadedSources' request.
body.try_emplace("supportsLoadedSourcesRequest", false);
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "LaunchRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Launch request; value of command field is 'launch'.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "launch" ]
// },
// "arguments": {
// "$ref": "#/definitions/LaunchRequestArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "LaunchRequestArguments": {
// "type": "object",
// "description": "Arguments for 'launch' request.",
// "properties": {
// "noDebug": {
// "type": "boolean",
// "description": "If noDebug is true the launch request should launch
// the program without enabling debugging."
// }
// }
// },
// "LaunchResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'launch' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_launch(const llvm::json::Object &request) {
llvm::json::Object response;
lldb::SBError error;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
g_vsc.init_commands = GetStrings(arguments, "initCommands");
g_vsc.pre_run_commands = GetStrings(arguments, "preRunCommands");
g_vsc.stop_commands = GetStrings(arguments, "stopCommands");
g_vsc.exit_commands = GetStrings(arguments, "exitCommands");
g_vsc.stop_at_entry = GetBoolean(arguments, "stopOnEntry", false);
const auto debuggerRoot = GetString(arguments, "debuggerRoot");
// This is a hack for loading DWARF in .o files on Mac where the .o files
// in the debug map of the main executable have relative paths which require
// the lldb-vscode binary to have its working directory set to that relative
// root for the .o files in order to be able to load debug info.
if (!debuggerRoot.empty()) {
llvm::sys::fs::set_current_path(debuggerRoot.data());
}
SetSourceMapFromArguments(*arguments);
// Run any initialize LLDB commands the user specified in the launch.json
g_vsc.RunInitCommands();
// Grab the current working directory if there is one and set it in the
// launch info.
const auto cwd = GetString(arguments, "cwd");
if (!cwd.empty())
g_vsc.launch_info.SetWorkingDirectory(cwd.data());
// Grab the name of the program we need to debug and set it as the first
// argument that will be passed to the program we will debug.
const auto program = GetString(arguments, "program");
if (!program.empty()) {
lldb::SBFileSpec program_fspec(program.data(), true /*resolve_path*/);
g_vsc.launch_info.SetExecutableFile(program_fspec,
true /*add_as_first_arg*/);
const char *target_triple = nullptr;
const char *uuid_cstr = nullptr;
// Stand alone debug info file if different from executable
const char *symfile = nullptr;
g_vsc.target.AddModule(program.data(), target_triple, uuid_cstr, symfile);
if (error.Fail()) {
response.try_emplace("success", false);
EmplaceSafeString(response, "message", std::string(error.GetCString()));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
}
// Extract any extra arguments and append them to our program arguments for
// when we launch
auto args = GetStrings(arguments, "args");
if (!args.empty())
g_vsc.launch_info.SetArguments(MakeArgv(args).data(), true);
// Pass any environment variables along that the user specified.
auto envs = GetStrings(arguments, "env");
if (!envs.empty())
g_vsc.launch_info.SetEnvironmentEntries(MakeArgv(envs).data(), true);
auto flags = g_vsc.launch_info.GetLaunchFlags();
if (GetBoolean(arguments, "disableASLR", true))
flags |= lldb::eLaunchFlagDisableASLR;
if (GetBoolean(arguments, "disableSTDIO", false))
flags |= lldb::eLaunchFlagDisableSTDIO;
if (GetBoolean(arguments, "shellExpandArguments", false))
flags |= lldb::eLaunchFlagShellExpandArguments;
const bool detatchOnError = GetBoolean(arguments, "detachOnError", false);
g_vsc.launch_info.SetDetachOnError(detatchOnError);
g_vsc.launch_info.SetLaunchFlags(flags | lldb::eLaunchFlagDebug |
lldb::eLaunchFlagStopAtEntry);
// Run any pre run LLDB commands the user specified in the launch.json
g_vsc.RunPreRunCommands();
// Disable async events so the launch will be successful when we return from
// the launch call and the launch will happen synchronously
g_vsc.debugger.SetAsync(false);
g_vsc.target.Launch(g_vsc.launch_info, error);
if (error.Fail()) {
response.try_emplace("success", false);
EmplaceSafeString(response, "message", std::string(error.GetCString()));
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
SendProcessEvent(Launch);
g_vsc.SendJSON(llvm::json::Value(CreateEventObject("initialized")));
// Reenable async events and start the event thread to catch async events.
g_vsc.debugger.SetAsync(true);
}
//----------------------------------------------------------------------
// "NextRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Next request; value of command field is 'next'. The
// request starts the debuggee to run again for one step.
// The debug adapter first sends the NextResponse and then
// a StoppedEvent (event type 'step') after the step has
// completed.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "next" ]
// },
// "arguments": {
// "$ref": "#/definitions/NextArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "NextArguments": {
// "type": "object",
// "description": "Arguments for 'next' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Execute 'next' for this thread."
// }
// },
// "required": [ "threadId" ]
// },
// "NextResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'next' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_next(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
lldb::SBThread thread = g_vsc.GetLLDBThread(*arguments);
if (thread.IsValid()) {
// Remember the thread ID that caused the resume so we can set the
// "threadCausedFocus" boolean value in the "stopped" events.
g_vsc.focus_tid = thread.GetThreadID();
thread.StepOver();
} else {
response.try_emplace("success", false);
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "PauseRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Pause request; value of command field is 'pause'. The
// request suspenses the debuggee. The debug adapter first sends the
// PauseResponse and then a StoppedEvent (event type 'pause') after the
// thread has been paused successfully.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "pause" ]
// },
// "arguments": {
// "$ref": "#/definitions/PauseArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "PauseArguments": {
// "type": "object",
// "description": "Arguments for 'pause' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Pause execution for this thread."
// }
// },
// "required": [ "threadId" ]
// },
// "PauseResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'pause' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_pause(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
lldb::SBProcess process = g_vsc.target.GetProcess();
lldb::SBError error = process.Stop();
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "ScopesRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Scopes request; value of command field is 'scopes'. The
// request returns the variable scopes for a given stackframe ID.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "scopes" ]
// },
// "arguments": {
// "$ref": "#/definitions/ScopesArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "ScopesArguments": {
// "type": "object",
// "description": "Arguments for 'scopes' request.",
// "properties": {
// "frameId": {
// "type": "integer",
// "description": "Retrieve the scopes for this stackframe."
// }
// },
// "required": [ "frameId" ]
// },
// "ScopesResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'scopes' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "scopes": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/Scope"
// },
// "description": "The scopes of the stackframe. If the array has
// length zero, there are no scopes available."
// }
// },
// "required": [ "scopes" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_scopes(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Object body;
auto arguments = request.getObject("arguments");
lldb::SBFrame frame = g_vsc.GetLLDBFrame(*arguments);
g_vsc.variables.Clear();
g_vsc.variables.Append(frame.GetVariables(true, // arguments
true, // locals
false, // statics
true)); // in_scope_only
g_vsc.num_locals = g_vsc.variables.GetSize();
g_vsc.variables.Append(frame.GetVariables(false, // arguments
false, // locals
true, // statics
true)); // in_scope_only
g_vsc.num_globals = g_vsc.variables.GetSize() - (g_vsc.num_locals);
g_vsc.variables.Append(frame.GetRegisters());
g_vsc.num_regs =
g_vsc.variables.GetSize() - (g_vsc.num_locals + g_vsc.num_globals);
body.try_emplace("scopes", g_vsc.CreateTopLevelScopes());
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "SetBreakpointsRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "SetBreakpoints request; value of command field is
// 'setBreakpoints'. Sets multiple breakpoints for a single source and
// clears all previous breakpoints in that source. To clear all breakpoint
// for a source, specify an empty array. When a breakpoint is hit, a
// StoppedEvent (event type 'breakpoint') is generated.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "setBreakpoints" ]
// },
// "arguments": {
// "$ref": "#/definitions/SetBreakpointsArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "SetBreakpointsArguments": {
// "type": "object",
// "description": "Arguments for 'setBreakpoints' request.",
// "properties": {
// "source": {
// "$ref": "#/definitions/Source",
// "description": "The source location of the breakpoints; either
// source.path or source.reference must be specified."
// },
// "breakpoints": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/SourceBreakpoint"
// },
// "description": "The code locations of the breakpoints."
// },
// "lines": {
// "type": "array",
// "items": {
// "type": "integer"
// },
// "description": "Deprecated: The code locations of the breakpoints."
// },
// "sourceModified": {
// "type": "boolean",
// "description": "A value of true indicates that the underlying source
// has been modified which results in new breakpoint locations."
// }
// },
// "required": [ "source" ]
// },
// "SetBreakpointsResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'setBreakpoints' request. Returned is
// information about each breakpoint created by this request. This includes
// the actual code location and whether the breakpoint could be verified.
// The breakpoints returned are in the same order as the elements of the
// 'breakpoints' (or the deprecated 'lines') in the
// SetBreakpointsArguments.", "properties": {
// "body": {
// "type": "object",
// "properties": {
// "breakpoints": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/Breakpoint"
// },
// "description": "Information about the breakpoints. The array
// elements are in the same order as the elements of the
// 'breakpoints' (or the deprecated 'lines') in the
// SetBreakpointsArguments."
// }
// },
// "required": [ "breakpoints" ]
// }
// },
// "required": [ "body" ]
// }]
// },
// "SourceBreakpoint": {
// "type": "object",
// "description": "Properties of a breakpoint or logpoint passed to the
// setBreakpoints request.", "properties": {
// "line": {
// "type": "integer",
// "description": "The source line of the breakpoint or logpoint."
// },
// "column": {
// "type": "integer",
// "description": "An optional source column of the breakpoint."
// },
// "condition": {
// "type": "string",
// "description": "An optional expression for conditional breakpoints."
// },
// "hitCondition": {
// "type": "string",
// "description": "An optional expression that controls how many hits of
// the breakpoint are ignored. The backend is expected to interpret the
// expression as needed."
// },
// "logMessage": {
// "type": "string",
// "description": "If this attribute exists and is non-empty, the backend
// must not 'break' (stop) but log the message instead. Expressions within
// {} are interpolated."
// }
// },
// "required": [ "line" ]
// }
//----------------------------------------------------------------------
void request_setBreakpoints(const llvm::json::Object &request) {
llvm::json::Object response;
lldb::SBError error;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
auto source = arguments->getObject("source");
const auto path = GetString(source, "path");
auto breakpoints = arguments->getArray("breakpoints");
llvm::json::Array response_breakpoints;
// Decode the source breakpoint infos for this "setBreakpoints" request
SourceBreakpointMap request_bps;
for (const auto &bp : *breakpoints) {
auto bp_obj = bp.getAsObject();
if (bp_obj) {
SourceBreakpoint src_bp(*bp_obj);
request_bps[src_bp.line] = std::move(src_bp);
}
}
// See if we already have breakpoints set for this source file from a
// previous "setBreakpoints" request
auto old_src_bp_pos = g_vsc.source_breakpoints.find(path);
if (old_src_bp_pos != g_vsc.source_breakpoints.end()) {
// We have already set breakpoints in this source file and they are giving
// use a new list of lines to set breakpoints on. Some breakpoints might
// already be set, and some might not. We need to remove any breakpoints
// whose lines are not contained in the any breakpoints lines in in the
// "breakpoints" array.
// Delete any breakpoints in this source file that aren't in the
// request_bps set. There is no call to remove breakpoints other than
// calling this function with a smaller or empty "breakpoints" list.
std::vector<uint32_t> remove_lines;
for (auto &pair: old_src_bp_pos->second) {
auto request_pos = request_bps.find(pair.first);
if (request_pos == request_bps.end()) {
// This breakpoint no longer exists in this source file, delete it
g_vsc.target.BreakpointDelete(pair.second.bp.GetID());
remove_lines.push_back(pair.first);
} else {
pair.second.UpdateBreakpoint(request_pos->second);
// Remove this breakpoint from the request breakpoints since we have
// handled it here and we don't need to set a new breakpoint below.
request_bps.erase(request_pos);
// Add this breakpoint info to the response
AppendBreakpoint(pair.second.bp, response_breakpoints);
}
}
// Remove any lines from this existing source breakpoint map
for (auto line: remove_lines)
old_src_bp_pos->second.erase(line);
// Now add any breakpoint infos left over in request_bps are the
// breakpoints that weren't set in this source file yet. We need to update
// thread source breakpoint info for the source file in the variable
// "old_src_bp_pos->second" so the info for this source file is up to date.
for (auto &pair : request_bps) {
pair.second.SetBreakpoint(path.data());
// Add this breakpoint info to the response
AppendBreakpoint(pair.second.bp, response_breakpoints);
old_src_bp_pos->second[pair.first] = std::move(pair.second);
}
} else {
// No breakpoints were set for this source file yet. Set all breakpoints
// for each line and add them to the response and create an entry in
// g_vsc.source_breakpoints for this source file.
for (auto &pair : request_bps) {
pair.second.SetBreakpoint(path.data());
// Add this breakpoint info to the response
AppendBreakpoint(pair.second.bp, response_breakpoints);
}
g_vsc.source_breakpoints[path] = std::move(request_bps);
}
llvm::json::Object body;
body.try_emplace("breakpoints", std::move(response_breakpoints));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "SetExceptionBreakpointsRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "SetExceptionBreakpoints request; value of command field
// is 'setExceptionBreakpoints'. The request configures the debuggers
// response to thrown exceptions. If an exception is configured to break, a
// StoppedEvent is fired (event type 'exception').", "properties": {
// "command": {
// "type": "string",
// "enum": [ "setExceptionBreakpoints" ]
// },
// "arguments": {
// "$ref": "#/definitions/SetExceptionBreakpointsArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "SetExceptionBreakpointsArguments": {
// "type": "object",
// "description": "Arguments for 'setExceptionBreakpoints' request.",
// "properties": {
// "filters": {
// "type": "array",
// "items": {
// "type": "string"
// },
// "description": "IDs of checked exception options. The set of IDs is
// returned via the 'exceptionBreakpointFilters' capability."
// },
// "exceptionOptions": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/ExceptionOptions"
// },
// "description": "Configuration options for selected exceptions."
// }
// },
// "required": [ "filters" ]
// },
// "SetExceptionBreakpointsResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'setExceptionBreakpoints' request. This is
// just an acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_setExceptionBreakpoints(const llvm::json::Object &request) {
llvm::json::Object response;
lldb::SBError error;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
auto filters = arguments->getArray("filters");
// Keep a list of any exception breakpoint filter names that weren't set
// so we can clear any exception breakpoints if needed.
std::set<std::string> unset_filters;
for (const auto &bp : g_vsc.exception_breakpoints)
unset_filters.insert(bp.filter);
for (const auto &value : *filters) {
const auto filter = GetAsString(value);
auto exc_bp = g_vsc.GetExceptionBreakpoint(filter);
if (exc_bp) {
exc_bp->SetBreakpoint();
unset_filters.erase(filter);
}
}
for (const auto &filter : unset_filters) {
auto exc_bp = g_vsc.GetExceptionBreakpoint(filter);
if (exc_bp)
exc_bp->ClearBreakpoint();
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "SetFunctionBreakpointsRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "SetFunctionBreakpoints request; value of command field is
// 'setFunctionBreakpoints'. Sets multiple function breakpoints and clears
// all previous function breakpoints. To clear all function breakpoint,
// specify an empty array. When a function breakpoint is hit, a StoppedEvent
// (event type 'function breakpoint') is generated.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "setFunctionBreakpoints" ]
// },
// "arguments": {
// "$ref": "#/definitions/SetFunctionBreakpointsArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "SetFunctionBreakpointsArguments": {
// "type": "object",
// "description": "Arguments for 'setFunctionBreakpoints' request.",
// "properties": {
// "breakpoints": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/FunctionBreakpoint"
// },
// "description": "The function names of the breakpoints."
// }
// },
// "required": [ "breakpoints" ]
// },
// "FunctionBreakpoint": {
// "type": "object",
// "description": "Properties of a breakpoint passed to the
// setFunctionBreakpoints request.", "properties": {
// "name": {
// "type": "string",
// "description": "The name of the function."
// },
// "condition": {
// "type": "string",
// "description": "An optional expression for conditional breakpoints."
// },
// "hitCondition": {
// "type": "string",
// "description": "An optional expression that controls how many hits of
// the breakpoint are ignored. The backend is expected to interpret the
// expression as needed."
// }
// },
// "required": [ "name" ]
// },
// "SetFunctionBreakpointsResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'setFunctionBreakpoints' request. Returned is
// information about each breakpoint created by this request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "breakpoints": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/Breakpoint"
// },
// "description": "Information about the breakpoints. The array
// elements correspond to the elements of the 'breakpoints' array."
// }
// },
// "required": [ "breakpoints" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_setFunctionBreakpoints(const llvm::json::Object &request) {
llvm::json::Object response;
lldb::SBError error;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
auto breakpoints = arguments->getArray("breakpoints");
FunctionBreakpointMap request_bps;
llvm::json::Array response_breakpoints;
for (const auto &value : *breakpoints) {
auto bp_obj = value.getAsObject();
if (bp_obj == nullptr)
continue;
FunctionBreakpoint func_bp(*bp_obj);
request_bps[func_bp.functionName] = std::move(func_bp);
}
std::vector<llvm::StringRef> remove_names;
// Disable any function breakpoints that aren't in the request_bps.
// There is no call to remove function breakpoints other than calling this
// function with a smaller or empty "breakpoints" list.
for (auto &pair: g_vsc.function_breakpoints) {
auto request_pos = request_bps.find(pair.first());
if (request_pos == request_bps.end()) {
// This function breakpoint no longer exists delete it from LLDB
g_vsc.target.BreakpointDelete(pair.second.bp.GetID());
remove_names.push_back(pair.first());
} else {
// Update the existing breakpoint as any setting withing the function
// breakpoint might have changed.
pair.second.UpdateBreakpoint(request_pos->second);
// Remove this breakpoint from the request breakpoints since we have
// handled it here and we don't need to set a new breakpoint below.
request_bps.erase(request_pos);
// Add this breakpoint info to the response
AppendBreakpoint(pair.second.bp, response_breakpoints);
}
}
// Remove any breakpoints that are no longer in our list
for (const auto &name: remove_names)
g_vsc.function_breakpoints.erase(name);
// Any breakpoints that are left in "request_bps" are breakpoints that
// need to be set.
for (auto &pair : request_bps) {
pair.second.SetBreakpoint();
// Add this breakpoint info to the response
AppendBreakpoint(pair.second.bp, response_breakpoints);
g_vsc.function_breakpoints[pair.first()] = std::move(pair.second);
}
llvm::json::Object body;
body.try_emplace("breakpoints", std::move(response_breakpoints));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "SourceRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Source request; value of command field is 'source'. The
// request retrieves the source code for a given source reference.",
// "properties": {
// "command": {
// "type": "string",
// "enum": [ "source" ]
// },
// "arguments": {
// "$ref": "#/definitions/SourceArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "SourceArguments": {
// "type": "object",
// "description": "Arguments for 'source' request.",
// "properties": {
// "source": {
// "$ref": "#/definitions/Source",
// "description": "Specifies the source content to load. Either
// source.path or source.sourceReference must be specified."
// },
// "sourceReference": {
// "type": "integer",
// "description": "The reference to the source. This is the same as
// source.sourceReference. This is provided for backward compatibility
// since old backends do not understand the 'source' attribute."
// }
// },
// "required": [ "sourceReference" ]
// },
// "SourceResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'source' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "content": {
// "type": "string",
// "description": "Content of the source reference."
// },
// "mimeType": {
// "type": "string",
// "description": "Optional content type (mime type) of the source."
// }
// },
// "required": [ "content" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_source(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Object body;
auto arguments = request.getObject("arguments");
auto source = arguments->getObject("source");
auto sourceReference = GetSigned(source, "sourceReference", -1);
auto pos = g_vsc.source_map.find((lldb::addr_t)sourceReference);
if (pos != g_vsc.source_map.end()) {
EmplaceSafeString(body, "content", pos->second.content);
} else {
response.try_emplace("success", false);
}
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "StackTraceRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "StackTrace request; value of command field is
// 'stackTrace'. The request returns a stacktrace from the current execution
// state.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "stackTrace" ]
// },
// "arguments": {
// "$ref": "#/definitions/StackTraceArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "StackTraceArguments": {
// "type": "object",
// "description": "Arguments for 'stackTrace' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Retrieve the stacktrace for this thread."
// },
// "startFrame": {
// "type": "integer",
// "description": "The index of the first frame to return; if omitted
// frames start at 0."
// },
// "levels": {
// "type": "integer",
// "description": "The maximum number of frames to return. If levels is
// not specified or 0, all frames are returned."
// },
// "format": {
// "$ref": "#/definitions/StackFrameFormat",
// "description": "Specifies details on how to format the stack frames."
// }
// },
// "required": [ "threadId" ]
// },
// "StackTraceResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'stackTrace' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "stackFrames": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/StackFrame"
// },
// "description": "The frames of the stackframe. If the array has
// length zero, there are no stackframes available. This means that
// there is no location information available."
// },
// "totalFrames": {
// "type": "integer",
// "description": "The total number of frames available."
// }
// },
// "required": [ "stackFrames" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_stackTrace(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
lldb::SBError error;
auto arguments = request.getObject("arguments");
lldb::SBThread thread = g_vsc.GetLLDBThread(*arguments);
llvm::json::Array stackFrames;
llvm::json::Object body;
if (thread.IsValid()) {
const auto startFrame = GetUnsigned(arguments, "startFrame", 0);
const auto levels = GetUnsigned(arguments, "levels", 0);
const auto endFrame = (levels == 0) ? INT64_MAX : (startFrame + levels);
for (uint32_t i = startFrame; i < endFrame; ++i) {
auto frame = thread.GetFrameAtIndex(i);
if (!frame.IsValid())
break;
stackFrames.emplace_back(CreateStackFrame(frame));
}
}
body.try_emplace("stackFrames", std::move(stackFrames));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "StepInRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "StepIn request; value of command field is 'stepIn'. The
// request starts the debuggee to step into a function/method if possible.
// If it cannot step into a target, 'stepIn' behaves like 'next'. The debug
// adapter first sends the StepInResponse and then a StoppedEvent (event
// type 'step') after the step has completed. If there are multiple
// function/method calls (or other targets) on the source line, the optional
// argument 'targetId' can be used to control into which target the 'stepIn'
// should occur. The list of possible targets for a given source line can be
// retrieved via the 'stepInTargets' request.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "stepIn" ]
// },
// "arguments": {
// "$ref": "#/definitions/StepInArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "StepInArguments": {
// "type": "object",
// "description": "Arguments for 'stepIn' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Execute 'stepIn' for this thread."
// },
// "targetId": {
// "type": "integer",
// "description": "Optional id of the target to step into."
// }
// },
// "required": [ "threadId" ]
// },
// "StepInResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'stepIn' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_stepIn(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
lldb::SBThread thread = g_vsc.GetLLDBThread(*arguments);
if (thread.IsValid()) {
// Remember the thread ID that caused the resume so we can set the
// "threadCausedFocus" boolean value in the "stopped" events.
g_vsc.focus_tid = thread.GetThreadID();
thread.StepInto();
} else {
response.try_emplace("success", false);
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "StepOutRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "StepOut request; value of command field is 'stepOut'. The
// request starts the debuggee to run again for one step. The debug adapter
// first sends the StepOutResponse and then a StoppedEvent (event type
// 'step') after the step has completed.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "stepOut" ]
// },
// "arguments": {
// "$ref": "#/definitions/StepOutArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "StepOutArguments": {
// "type": "object",
// "description": "Arguments for 'stepOut' request.",
// "properties": {
// "threadId": {
// "type": "integer",
// "description": "Execute 'stepOut' for this thread."
// }
// },
// "required": [ "threadId" ]
// },
// "StepOutResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'stepOut' request. This is just an
// acknowledgement, so no body field is required."
// }]
// }
//----------------------------------------------------------------------
void request_stepOut(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
auto arguments = request.getObject("arguments");
lldb::SBThread thread = g_vsc.GetLLDBThread(*arguments);
if (thread.IsValid()) {
// Remember the thread ID that caused the resume so we can set the
// "threadCausedFocus" boolean value in the "stopped" events.
g_vsc.focus_tid = thread.GetThreadID();
thread.StepOut();
} else {
response.try_emplace("success", false);
}
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "ThreadsRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Thread request; value of command field is 'threads'. The
// request retrieves a list of all threads.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "threads" ]
// }
// },
// "required": [ "command" ]
// }]
// },
// "ThreadsResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'threads' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "threads": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/Thread"
// },
// "description": "All threads."
// }
// },
// "required": [ "threads" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_threads(const llvm::json::Object &request) {
lldb::SBProcess process = g_vsc.target.GetProcess();
llvm::json::Object response;
FillResponse(request, response);
const uint32_t num_threads = process.GetNumThreads();
llvm::json::Array threads;
for (uint32_t thread_idx = 0; thread_idx < num_threads; ++thread_idx) {
lldb::SBThread thread = process.GetThreadAtIndex(thread_idx);
threads.emplace_back(CreateThread(thread));
}
if (threads.size() == 0) {
response.try_emplace("success", false);
}
llvm::json::Object body;
body.try_emplace("threads", std::move(threads));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "SetVariableRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "setVariable request; value of command field is
// 'setVariable'. Set the variable with the given name in the variable
// container to a new value.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "setVariable" ]
// },
// "arguments": {
// "$ref": "#/definitions/SetVariableArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "SetVariableArguments": {
// "type": "object",
// "description": "Arguments for 'setVariable' request.",
// "properties": {
// "variablesReference": {
// "type": "integer",
// "description": "The reference of the variable container."
// },
// "name": {
// "type": "string",
// "description": "The name of the variable."
// },
// "value": {
// "type": "string",
// "description": "The value of the variable."
// },
// "format": {
// "$ref": "#/definitions/ValueFormat",
// "description": "Specifies details on how to format the response value."
// }
// },
// "required": [ "variablesReference", "name", "value" ]
// },
// "SetVariableResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'setVariable' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "value": {
// "type": "string",
// "description": "The new value of the variable."
// },
// "type": {
// "type": "string",
// "description": "The type of the new value. Typically shown in the
// UI when hovering over the value."
// },
// "variablesReference": {
// "type": "number",
// "description": "If variablesReference is > 0, the new value is
// structured and its children can be retrieved by passing
// variablesReference to the VariablesRequest."
// },
// "namedVariables": {
// "type": "number",
// "description": "The number of named child variables. The client
// can use this optional information to present the variables in a
// paged UI and fetch them in chunks."
// },
// "indexedVariables": {
// "type": "number",
// "description": "The number of indexed child variables. The client
// can use this optional information to present the variables in a
// paged UI and fetch them in chunks."
// }
// },
// "required": [ "value" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_setVariable(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Array variables;
llvm::json::Object body;
auto arguments = request.getObject("arguments");
// This is a reference to the containing variable/scope
const auto variablesReference =
GetUnsigned(arguments, "variablesReference", 0);
const auto name = GetString(arguments, "name");
const auto value = GetString(arguments, "value");
// Set success to false just in case we don't find the variable by name
response.try_emplace("success", false);
lldb::SBValue variable;
int64_t newVariablesReference = 0;
// The "id" is the unique integer ID that is unique within the enclosing
// variablesReference. It is optionally added to any "interface Variable"
// objects to uniquely identify a variable within an enclosing
// variablesReference. It helps to disambiguate between two variables that
// have the same name within the same scope since the "setVariables" request
// only specifies the variable reference of the enclosing scope/variable, and
// the name of the variable. We could have two shadowed variables with the
// same name in "Locals" or "Globals". In our case the "id" absolute index
// of the variable within the g_vsc.variables list.
const auto id_value = GetUnsigned(arguments, "id", UINT64_MAX);
if (id_value != UINT64_MAX) {
variable = g_vsc.variables.GetValueAtIndex(id_value);
} else if (VARREF_IS_SCOPE(variablesReference)) {
// variablesReference is one of our scopes, not an actual variable it is
// asking for a variable in locals or globals or registers
int64_t start_idx = 0;
int64_t end_idx = 0;
switch (variablesReference) {
case VARREF_LOCALS:
start_idx = 0;
end_idx = start_idx + g_vsc.num_locals;
break;
case VARREF_GLOBALS:
start_idx = g_vsc.num_locals;
end_idx = start_idx + g_vsc.num_globals;
break;
case VARREF_REGS:
start_idx = g_vsc.num_locals + g_vsc.num_globals;
end_idx = start_idx + g_vsc.num_regs;
break;
default:
break;
}
// Find the variable by name in the correct scope and hope we don't have
// multiple variables with the same name. We search backwards because
// the list of variables has the top most variables first and variables
// in deeper scopes are last. This means we will catch the deepest
// variable whose name matches which is probably what the user wants.
for (int64_t i = end_idx - 1; i >= start_idx; --i) {
auto curr_variable = g_vsc.variables.GetValueAtIndex(i);
llvm::StringRef variable_name(curr_variable.GetName());
if (variable_name == name) {
variable = curr_variable;
if (curr_variable.MightHaveChildren())
newVariablesReference = i;
break;
}
}
} else {
// We have a named item within an actual variable so we need to find it
// withing the container variable by name.
const int64_t var_idx = VARREF_TO_VARIDX(variablesReference);
lldb::SBValue container = g_vsc.variables.GetValueAtIndex(var_idx);
variable = container.GetChildMemberWithName(name.data());
if (!variable.IsValid()) {
if (name.startswith("[")) {
llvm::StringRef index_str(name.drop_front(1));
uint64_t index = 0;
if (!index_str.consumeInteger(0, index)) {
if (index_str == "]")
variable = container.GetChildAtIndex(index);
}
}
}
// We don't know the index of the variable in our g_vsc.variables
if (variable.IsValid()) {
if (variable.MightHaveChildren()) {
newVariablesReference = VARIDX_TO_VARREF(g_vsc.variables.GetSize());
g_vsc.variables.Append(variable);
}
}
}
if (variable.IsValid()) {
lldb::SBError error;
bool success = variable.SetValueFromCString(value.data(), error);
if (success) {
SetValueForKey(variable, body, "value");
EmplaceSafeString(body, "type", variable.GetType().GetDisplayTypeName());
body.try_emplace("variablesReference", newVariablesReference);
} else {
EmplaceSafeString(body, "message", std::string(error.GetCString()));
}
response.try_emplace("success", success);
}
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
//----------------------------------------------------------------------
// "VariablesRequest": {
// "allOf": [ { "$ref": "#/definitions/Request" }, {
// "type": "object",
// "description": "Variables request; value of command field is 'variables'.
// Retrieves all child variables for the given variable reference. An
// optional filter can be used to limit the fetched children to either named
// or indexed children.", "properties": {
// "command": {
// "type": "string",
// "enum": [ "variables" ]
// },
// "arguments": {
// "$ref": "#/definitions/VariablesArguments"
// }
// },
// "required": [ "command", "arguments" ]
// }]
// },
// "VariablesArguments": {
// "type": "object",
// "description": "Arguments for 'variables' request.",
// "properties": {
// "variablesReference": {
// "type": "integer",
// "description": "The Variable reference."
// },
// "filter": {
// "type": "string",
// "enum": [ "indexed", "named" ],
// "description": "Optional filter to limit the child variables to either
// named or indexed. If ommited, both types are fetched."
// },
// "start": {
// "type": "integer",
// "description": "The index of the first variable to return; if omitted
// children start at 0."
// },
// "count": {
// "type": "integer",
// "description": "The number of variables to return. If count is missing
// or 0, all variables are returned."
// },
// "format": {
// "$ref": "#/definitions/ValueFormat",
// "description": "Specifies details on how to format the Variable
// values."
// }
// },
// "required": [ "variablesReference" ]
// },
// "VariablesResponse": {
// "allOf": [ { "$ref": "#/definitions/Response" }, {
// "type": "object",
// "description": "Response to 'variables' request.",
// "properties": {
// "body": {
// "type": "object",
// "properties": {
// "variables": {
// "type": "array",
// "items": {
// "$ref": "#/definitions/Variable"
// },
// "description": "All (or a range) of variables for the given
// variable reference."
// }
// },
// "required": [ "variables" ]
// }
// },
// "required": [ "body" ]
// }]
// }
//----------------------------------------------------------------------
void request_variables(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Array variables;
auto arguments = request.getObject("arguments");
const auto variablesReference =
GetUnsigned(arguments, "variablesReference", 0);
const int64_t start = GetSigned(arguments, "start", 0);
const int64_t count = GetSigned(arguments, "count", 0);
bool hex = false;
auto format = arguments->getObject("format");
if (format)
hex = GetBoolean(format, "hex", false);
if (VARREF_IS_SCOPE(variablesReference)) {
// variablesReference is one of our scopes, not an actual variable it is
// asking for the list of args, locals or globals.
int64_t start_idx = 0;
int64_t num_children = 0;
switch (variablesReference) {
case VARREF_LOCALS:
start_idx = start;
num_children = g_vsc.num_locals;
break;
case VARREF_GLOBALS:
start_idx = start + g_vsc.num_locals + start;
num_children = g_vsc.num_globals;
break;
case VARREF_REGS:
start_idx = start + g_vsc.num_locals + g_vsc.num_globals;
num_children = g_vsc.num_regs;
break;
default:
break;
}
const int64_t end_idx = start_idx + ((count == 0) ? num_children : count);
for (auto i = start_idx; i < end_idx; ++i) {
lldb::SBValue variable = g_vsc.variables.GetValueAtIndex(i);
if (!variable.IsValid())
break;
variables.emplace_back(
CreateVariable(variable, VARIDX_TO_VARREF(i), i, hex));
}
} else {
// We are expanding a variable that has children, so we will return its
// children.
const int64_t var_idx = VARREF_TO_VARIDX(variablesReference);
lldb::SBValue variable = g_vsc.variables.GetValueAtIndex(var_idx);
if (variable.IsValid()) {
const auto num_children = variable.GetNumChildren();
const int64_t end_idx = start + ((count == 0) ? num_children : count);
for (auto i = start; i < end_idx; ++i) {
lldb::SBValue child = variable.GetChildAtIndex(i);
if (!child.IsValid())
break;
if (child.MightHaveChildren()) {
const int64_t var_idx = g_vsc.variables.GetSize();
auto childVariablesReferences = VARIDX_TO_VARREF(var_idx);
variables.emplace_back(
CreateVariable(child, childVariablesReferences, var_idx, hex));
g_vsc.variables.Append(child);
} else {
variables.emplace_back(CreateVariable(child, 0, INT64_MAX, hex));
}
}
}
}
llvm::json::Object body;
body.try_emplace("variables", std::move(variables));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
// A request used in testing to get the details on all breakpoints that are
// currently set in the target. This helps us to test "setBreakpoints" and
// "setFunctionBreakpoints" requests to verify we have the correct set of
// breakpoints currently set in LLDB.
void request__testGetTargetBreakpoints(const llvm::json::Object &request) {
llvm::json::Object response;
FillResponse(request, response);
llvm::json::Array response_breakpoints;
for (uint32_t i = 0; g_vsc.target.GetBreakpointAtIndex(i).IsValid(); ++i) {
auto bp = g_vsc.target.GetBreakpointAtIndex(i);
AppendBreakpoint(bp, response_breakpoints);
}
llvm::json::Object body;
body.try_emplace("breakpoints", std::move(response_breakpoints));
response.try_emplace("body", std::move(body));
g_vsc.SendJSON(llvm::json::Value(std::move(response)));
}
const std::map<std::string, RequestCallback> &GetRequestHandlers() {
#define REQUEST_CALLBACK(name) \
{ #name, request_##name }
static std::map<std::string, RequestCallback> g_request_handlers = {
// VSCode Debug Adaptor requests
REQUEST_CALLBACK(attach),
REQUEST_CALLBACK(continue),
REQUEST_CALLBACK(configurationDone),
REQUEST_CALLBACK(disconnect),
REQUEST_CALLBACK(evaluate),
REQUEST_CALLBACK(exceptionInfo),
REQUEST_CALLBACK(initialize),
REQUEST_CALLBACK(launch),
REQUEST_CALLBACK(next),
REQUEST_CALLBACK(pause),
REQUEST_CALLBACK(scopes),
REQUEST_CALLBACK(setBreakpoints),
REQUEST_CALLBACK(setExceptionBreakpoints),
REQUEST_CALLBACK(setFunctionBreakpoints),
REQUEST_CALLBACK(setVariable),
REQUEST_CALLBACK(source),
REQUEST_CALLBACK(stackTrace),
REQUEST_CALLBACK(stepIn),
REQUEST_CALLBACK(stepOut),
REQUEST_CALLBACK(threads),
REQUEST_CALLBACK(variables),
// Testing requests
REQUEST_CALLBACK(_testGetTargetBreakpoints),
};
#undef REQUEST_CALLBACK
return g_request_handlers;
}
} // anonymous namespace
int main(int argc, char *argv[]) {
// Initialize LLDB first before we do anything.
lldb::SBDebugger::Initialize();
if (argc == 2) {
const char *arg = argv[1];
#if !defined(_WIN32)
if (strcmp(arg, "-g") == 0) {
printf("Paused waiting for debugger to attach (pid = %i)...\n", getpid());
pause();
} else {
#else
{
#endif
int portno = atoi(arg);
printf("Listening on port %i...\n", portno);
int socket_fd = AcceptConnection(portno);
if (socket_fd >= 0) {
// We must open two FILE objects, one for reading and one for writing
// the FILE objects have a mutex in them that won't allow reading and
// writing to the socket stream.
g_vsc.in = fdopen(socket_fd, "r");
g_vsc.out = fdopen(socket_fd, "w");
if (g_vsc.in == nullptr || g_vsc.out == nullptr) {
if (g_vsc.log)
*g_vsc.log << "fdopen failed (" << strerror(errno) << ")"
<< std::endl;
exit(1);
}
} else {
exit(1);
}
}
}
auto request_handlers = GetRequestHandlers();
uint32_t packet_idx = 0;
while (true) {
std::string json = g_vsc.ReadJSON();
if (json.empty())
break;
llvm::StringRef json_sref(json);
llvm::Expected<llvm::json::Value> json_value = llvm::json::parse(json_sref);
if (!json_value) {
auto error = json_value.takeError();
if (g_vsc.log) {
std::string error_str;
llvm::raw_string_ostream strm(error_str);
strm << error;
strm.flush();
*g_vsc.log << "error: failed to parse JSON: " << error_str << std::endl
<< json << std::endl;
}
return 1;
}
auto object = json_value->getAsObject();
if (!object) {
if (g_vsc.log)
*g_vsc.log << "error: json packet isn't a object" << std::endl;
return 1;
}
const auto packet_type = GetString(object, "type");
if (packet_type == "request") {
const auto command = GetString(object, "command");
auto handler_pos = request_handlers.find(command);
if (handler_pos != request_handlers.end()) {
handler_pos->second(*object);
} else {
if (g_vsc.log)
*g_vsc.log << "error: unhandled command \"" << command.data() << std::endl;
return 1;
}
}
++packet_idx;
}
// We must terminate the debugger in a thread before the C++ destructor
// chain messes everything up.
lldb::SBDebugger::Terminate();
return 0;
}
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