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// Copyright 2019 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "Server.hpp"
#include "Context.hpp"
#include "EventListener.hpp"
#include "File.hpp"
#include "Thread.hpp"
#include "Variable.hpp"
#include "dap/network.h"
#include "dap/protocol.h"
#include "dap/session.h"
#include "marl/waitgroup.h"
#include <thread>
#include <unordered_set>
// Switch for controlling DAP debug logging
#define ENABLE_DAP_LOGGING 0
#if ENABLE_DAP_LOGGING
# define DAP_LOG(msg, ...) printf(msg "\n", ##__VA_ARGS__)
#else
# define DAP_LOG(...) \
do \
{ \
} while(false)
#endif
namespace vk {
namespace dbg {
class Server::Impl : public Server, public ServerEventListener
{
public:
Impl(const std::shared_ptr<Context> &ctx, int port);
~Impl();
// EventListener
void onThreadStarted(ID<Thread>) override;
void onThreadStepped(ID<Thread>) override;
void onLineBreakpointHit(ID<Thread>) override;
void onFunctionBreakpointHit(ID<Thread>) override;
dap::Scope scope(Context::Lock &lock, const char *type, Scope *);
dap::Source source(File *);
std::shared_ptr<File> file(const dap::Source &source);
const std::shared_ptr<Context> ctx;
const std::unique_ptr<dap::net::Server> server;
const std::unique_ptr<dap::Session> session;
std::atomic<bool> clientIsVisualStudio = { false };
};
Server::Impl::Impl(const std::shared_ptr<Context> &context, int port)
: ctx(context)
, server(dap::net::Server::create())
, session(dap::Session::create())
{
session->registerHandler([](const dap::DisconnectRequest &req) {
DAP_LOG("DisconnectRequest receieved");
return dap::DisconnectResponse();
});
session->registerHandler([&](const dap::InitializeRequest &req) {
DAP_LOG("InitializeRequest receieved");
dap::InitializeResponse response;
response.supportsFunctionBreakpoints = true;
response.supportsConfigurationDoneRequest = true;
response.supportsEvaluateForHovers = true;
clientIsVisualStudio = (req.clientID.value("") == "visualstudio");
return response;
});
session->registerSentHandler(
[&](const dap::ResponseOrError<dap::InitializeResponse> &response) {
DAP_LOG("InitializeResponse sent");
session->send(dap::InitializedEvent());
});
session->registerHandler([](const dap::SetExceptionBreakpointsRequest &req) {
DAP_LOG("SetExceptionBreakpointsRequest receieved");
dap::SetExceptionBreakpointsResponse response;
return response;
});
session->registerHandler(
[this](const dap::SetFunctionBreakpointsRequest &req) {
DAP_LOG("SetFunctionBreakpointsRequest receieved");
dap::SetFunctionBreakpointsResponse response;
for(auto const &reqBP : req.breakpoints)
{
DAP_LOG("Setting breakpoint for function '%s'", reqBP.name.c_str());
bool verified = false;
ctx->clientEventBroadcast()->onSetBreakpoint(reqBP.name, verified);
dap::Breakpoint resBP{};
resBP.verified = verified;
response.breakpoints.emplace_back(std::move(resBP));
}
{
auto lock = ctx->lock();
lock.clearFunctionBreakpoints();
for(auto const &reqBP : req.breakpoints)
{
lock.addFunctionBreakpoint(reqBP.name.c_str());
}
}
ctx->clientEventBroadcast()->onBreakpointsChanged();
return response;
});
session->registerHandler(
[this](const dap::SetBreakpointsRequest &req)
-> dap::ResponseOrError<dap::SetBreakpointsResponse> {
DAP_LOG("SetBreakpointsRequest receieved");
size_t numBreakpoints = 0;
if(req.breakpoints.has_value())
{
auto const &breakpoints = req.breakpoints.value();
numBreakpoints = breakpoints.size();
if(auto file = this->file(req.source))
{
dap::SetBreakpointsResponse response;
file->clearBreakpoints();
for(size_t i = 0; i < numBreakpoints; i++)
{
auto &reqBP = breakpoints[i];
Location location{ file, static_cast<int>(reqBP.line) };
file->addBreakpoint(location.line);
bool verified = false;
ctx->clientEventBroadcast()->onSetBreakpoint(location, verified);
dap::Breakpoint respBP;
respBP.verified = verified;
respBP.source = req.source;
response.breakpoints.push_back(respBP);
}
ctx->clientEventBroadcast()->onBreakpointsChanged();
return response;
}
if(req.source.name.has_value())
{
std::vector<int> lines;
lines.reserve(breakpoints.size());
for(auto const &bp : breakpoints)
{
lines.push_back(bp.line);
}
ctx->lock().addPendingBreakpoints(req.source.name.value(),
lines);
}
}
// Generic response.
dap::SetBreakpointsResponse response;
for(size_t i = 0; i < numBreakpoints; i++)
{
dap::Breakpoint bp;
bp.verified = false;
bp.source = req.source;
response.breakpoints.push_back(bp);
}
ctx->clientEventBroadcast()->onBreakpointsChanged();
return response;
});
session->registerHandler([this](const dap::ThreadsRequest &req) {
DAP_LOG("ThreadsRequest receieved");
auto lock = ctx->lock();
dap::ThreadsResponse response;
for(auto thread : lock.threads())
{
std::string name = thread->name();
if(clientIsVisualStudio)
{
// WORKAROUND: https://github.com/microsoft/VSDebugAdapterHost/issues/15
for(size_t i = 0; i < name.size(); i++)
{
if(name[i] == '.')
{
name[i] = '_';
}
}
}
dap::Thread out;
out.id = thread->id.value();
out.name = name;
response.threads.push_back(out);
};
return response;
});
session->registerHandler(
[this](const dap::StackTraceRequest &req)
-> dap::ResponseOrError<dap::StackTraceResponse> {
DAP_LOG("StackTraceRequest receieved");
auto lock = ctx->lock();
auto thread = lock.get(Thread::ID(req.threadId));
if(!thread)
{
return dap::Error("Thread %d not found", req.threadId);
}
auto stack = thread->stack();
dap::StackTraceResponse response;
response.totalFrames = stack.size();
response.stackFrames.reserve(stack.size());
for(int i = static_cast<int>(stack.size()) - 1; i >= 0; i--)
{
auto const &frame = stack[i];
auto const &loc = frame.location;
dap::StackFrame sf;
sf.column = 0;
sf.id = frame.id.value();
sf.name = frame.function;
sf.line = loc.line;
if(loc.file)
{
sf.source = source(loc.file.get());
}
response.stackFrames.emplace_back(std::move(sf));
}
return response;
});
session->registerHandler([this](const dap::ScopesRequest &req)
-> dap::ResponseOrError<dap::ScopesResponse> {
DAP_LOG("ScopesRequest receieved");
auto lock = ctx->lock();
auto frame = lock.get(Frame::ID(req.frameId));
if(!frame)
{
return dap::Error("Frame %d not found", req.frameId);
}
dap::ScopesResponse response;
response.scopes = {
scope(lock, "locals", frame->locals.get()),
scope(lock, "arguments", frame->arguments.get()),
scope(lock, "registers", frame->registers.get()),
};
return response;
});
session->registerHandler([this](const dap::VariablesRequest &req)
-> dap::ResponseOrError<dap::VariablesResponse> {
DAP_LOG("VariablesRequest receieved");
auto lock = ctx->lock();
auto vars = lock.get(Variables::ID(req.variablesReference));
if(!vars)
{
return dap::Error("VariablesReference %d not found",
int(req.variablesReference));
}
dap::VariablesResponse response;
vars->foreach(req.start.value(0), req.count.value(~0), [&](const Variable &v) {
dap::Variable out;
out.evaluateName = v.name;
out.name = v.name;
out.type = v.value->type();
out.value = v.value->get();
if(auto children = v.value->children())
{
out.variablesReference = children->id.value();
lock.track(children);
}
response.variables.push_back(out);
return true;
});
return response;
});
session->registerHandler([this](const dap::SourceRequest &req)
-> dap::ResponseOrError<dap::SourceResponse> {
DAP_LOG("SourceRequest receieved");
dap::SourceResponse response;
uint64_t id = req.sourceReference;
auto lock = ctx->lock();
auto file = lock.get(File::ID(id));
if(!file)
{
return dap::Error("Source %d not found", id);
}
response.content = file->source;
return response;
});
session->registerHandler([this](const dap::PauseRequest &req)
-> dap::ResponseOrError<dap::PauseResponse> {
DAP_LOG("PauseRequest receieved");
dap::StoppedEvent event;
event.reason = "pause";
auto lock = ctx->lock();
if(auto thread = lock.get(Thread::ID(req.threadId)))
{
thread->pause();
event.threadId = req.threadId;
}
else
{
auto threads = lock.threads();
for(auto thread : threads)
{
thread->pause();
}
event.allThreadsStopped = true;
// Workaround for
// https://github.com/microsoft/VSDebugAdapterHost/issues/11
if(clientIsVisualStudio && !threads.empty())
{
event.threadId = threads.front()->id.value();
}
}
session->send(event);
dap::PauseResponse response;
return response;
});
session->registerHandler([this](const dap::ContinueRequest &req)
-> dap::ResponseOrError<dap::ContinueResponse> {
DAP_LOG("ContinueRequest receieved");
dap::ContinueResponse response;
auto lock = ctx->lock();
if(auto thread = lock.get(Thread::ID(req.threadId)))
{
thread->resume();
response.allThreadsContinued = false;
}
else
{
for(auto it : lock.threads())
{
thread->resume();
}
response.allThreadsContinued = true;
}
return response;
});
session->registerHandler([this](const dap::NextRequest &req)
-> dap::ResponseOrError<dap::NextResponse> {
DAP_LOG("NextRequest receieved");
auto lock = ctx->lock();
auto thread = lock.get(Thread::ID(req.threadId));
if(!thread)
{
return dap::Error("Unknown thread %d", int(req.threadId));
}
thread->stepOver();
return dap::NextResponse();
});
session->registerHandler([this](const dap::StepInRequest &req)
-> dap::ResponseOrError<dap::StepInResponse> {
DAP_LOG("StepInRequest receieved");
auto lock = ctx->lock();
auto thread = lock.get(Thread::ID(req.threadId));
if(!thread)
{
return dap::Error("Unknown thread %d", int(req.threadId));
}
thread->stepIn();
return dap::StepInResponse();
});
session->registerHandler([this](const dap::StepOutRequest &req)
-> dap::ResponseOrError<dap::StepOutResponse> {
DAP_LOG("StepOutRequest receieved");
auto lock = ctx->lock();
auto thread = lock.get(Thread::ID(req.threadId));
if(!thread)
{
return dap::Error("Unknown thread %d", int(req.threadId));
}
thread->stepOut();
return dap::StepOutResponse();
});
session->registerHandler([this](const dap::EvaluateRequest &req)
-> dap::ResponseOrError<dap::EvaluateResponse> {
DAP_LOG("EvaluateRequest receieved");
auto lock = ctx->lock();
if(req.frameId.has_value())
{
auto frame = lock.get(Frame::ID(req.frameId.value(0)));
if(!frame)
{
return dap::Error("Unknown frame %d", int(req.frameId.value()));
}
auto fmt = FormatFlags::Default;
auto subfmt = FormatFlags::Default;
if(req.context.value("") == "hover")
{
subfmt.listPrefix = "\n";
subfmt.listSuffix = "";
subfmt.listDelimiter = "\n";
subfmt.listIndent = " ";
fmt.listPrefix = "";
fmt.listSuffix = "";
fmt.listDelimiter = "\n";
fmt.listIndent = "";
fmt.subListFmt = &subfmt;
}
dap::EvaluateResponse response;
std::vector<std::shared_ptr<vk::dbg::Variables>> variables = {
frame->locals->variables,
frame->arguments->variables,
frame->registers->variables,
frame->hovers->variables,
};
for(auto const &vars : variables)
{
if(auto val = vars->get(req.expression))
{
response.result = val->get(fmt);
response.type = val->type();
return response;
}
}
// HACK: VSCode does not appear to include the % in %123 tokens
// TODO: This might be a configuration problem of the SPIRV-Tools
// spirv-ls plugin. Investigate.
auto withPercent = "%" + req.expression;
for(auto const &vars : variables)
{
if(auto val = vars->get(withPercent))
{
response.result = val->get(fmt);
response.type = val->type();
return response;
}
}
}
return dap::Error("Could not evaluate expression");
});
session->registerHandler([](const dap::LaunchRequest &req) {
DAP_LOG("LaunchRequest receieved");
return dap::LaunchResponse();
});
marl::WaitGroup configurationDone(1);
session->registerHandler([=](const dap::ConfigurationDoneRequest &req) {
DAP_LOG("ConfigurationDoneRequest receieved");
configurationDone.done();
return dap::ConfigurationDoneResponse();
});
server->start(port, [&](const std::shared_ptr<dap::ReaderWriter> &rw) {
session->bind(rw);
ctx->addListener(this);
});
static bool waitForDebugger = getenv("VK_WAIT_FOR_DEBUGGER") != nullptr;
if(waitForDebugger)
{
printf("Waiting for debugger connection...\n");
configurationDone.wait();
printf("Debugger connection established\n");
}
}
Server::Impl::~Impl()
{
ctx->removeListener(this);
server->stop();
}
void Server::Impl::onThreadStarted(ID<Thread> id)
{
dap::ThreadEvent event;
event.reason = "started";
event.threadId = id.value();
session->send(event);
}
void Server::Impl::onThreadStepped(ID<Thread> id)
{
dap::StoppedEvent event;
event.threadId = id.value();
event.reason = "step";
session->send(event);
}
void Server::Impl::onLineBreakpointHit(ID<Thread> id)
{
dap::StoppedEvent event;
event.threadId = id.value();
event.reason = "breakpoint";
session->send(event);
}
void Server::Impl::onFunctionBreakpointHit(ID<Thread> id)
{
dap::StoppedEvent event;
event.threadId = id.value();
event.reason = "function breakpoint";
session->send(event);
}
dap::Scope Server::Impl::scope(Context::Lock &lock, const char *type, Scope *s)
{
dap::Scope out;
// out.line = s->startLine;
// out.endLine = s->endLine;
out.source = source(s->file.get());
out.name = type;
out.presentationHint = type;
out.variablesReference = s->variables->id.value();
lock.track(s->variables);
return out;
}
dap::Source Server::Impl::source(File *file)
{
dap::Source out;
out.name = file->name;
if(file->isVirtual())
{
out.sourceReference = file->id.value();
}
out.path = file->path();
return out;
}
std::shared_ptr<File> Server::Impl::file(const dap::Source &source)
{
auto lock = ctx->lock();
if(source.sourceReference.has_value())
{
auto id = source.sourceReference.value();
if(auto file = lock.get(File::ID(id)))
{
return file;
}
}
auto files = lock.files();
if(source.path.has_value())
{
auto path = source.path.value();
std::shared_ptr<File> out;
for(auto file : files)
{
if(file->path() == path)
{
out = file;
break;
}
}
return out;
}
if(source.name.has_value())
{
auto name = source.name.value();
std::shared_ptr<File> out;
for(auto file : files)
{
if(file->name == name)
{
out = file;
break;
}
}
return out;
}
return nullptr;
}
std::shared_ptr<Server> Server::create(const std::shared_ptr<Context> &ctx, int port)
{
return std::make_shared<Server::Impl>(ctx, port);
}
} // namespace dbg
} // namespace vk