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876 lines (798 loc) · 20.5 KB
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Copy pathworker.lua
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876 lines (798 loc) · 20.5 KB
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local rdebug = require 'luadebug.visitor'
local variables = require 'backend.worker.variables'
local source = require 'backend.worker.source'
local breakpoint = require 'backend.worker.breakpoint'
local evaluate = require 'backend.worker.evaluate'
local traceback = require 'backend.worker.traceback'
local stdout = require 'backend.worker.stdout'
local luaver = require 'backend.worker.luaver'
local ev = require 'backend.event'
local hookmgr = require 'luadebug.hookmgr'
local stdio = require 'luadebug.stdio'
local thread = require 'bee.thread'
local fs = require 'backend.worker.filesystem'
local log = require 'common.log'
local initialized = false
local suspend = false
local info = {}
local state = 'running'
local stopReason = 'step'
local currentException = {
message = '',
trace = '',
}
local outputCapture = {}
local noDebug = false
local autoUpdate = true
local coroutineTree = {}
local stackFrame = {}
local skipFrame = 0
local baseL
local CMD = {}
local WorkerIdent = tostring(thread.id)
local WorkerChannel = ('DbgWorker(%s)'):format(WorkerIdent)
thread.newchannel(WorkerChannel)
local masterThread = thread.channel 'DbgMaster'
local workerThread = thread.channel(WorkerChannel)
local function workerThreadUpdate(timeout)
while true do
local ok, msg = workerThread:pop(timeout)
if not ok then
break
end
local ok, err = xpcall(function()
local f = CMD[msg.cmd]
if f then
f(msg)
end
end, debug.traceback)
if not ok then
log.error("ERROR:"..err)
end
end
end
local function sendToMaster(cmd)
return function(msg)
masterThread:push(WorkerIdent, cmd, msg)
end
end
ev.on('breakpoint', function(reason, bp)
sendToMaster 'eventBreakpoint' {
reason = reason,
breakpoint = bp,
}
end)
ev.on('output', function(body)
sendToMaster 'eventOutput' (body)
end)
ev.on('loadedSource', function(reason, s)
local src = source.output(s)
if src then
sendToMaster 'eventLoadedSource' {
reason = reason,
source = src
}
end
end)
ev.on('memory', function(memoryReference, offset, count)
sendToMaster 'eventMemory' {
memoryReference = memoryReference,
offset = offset,
count = count,
}
end)
--function print(...)
-- local n = select('#', ...)
-- local t = {}
-- for i = 1, n do
-- t[i] = tostring(select(i, ...))
-- end
-- ev.emit('output', {
-- category = 'stderr',
-- output = table.concat(t, '\t')..'\n',
-- })
--end
local function cleanFrame()
variables.clean()
stackFrame = {}
end
function CMD.initializing(pkg)
luaver.init()
ev.emit('initializing', pkg.config)
end
function CMD.initialized()
initialized = true
suspend = false
sendToMaster 'eventThread' {
reason = 'started',
}
end
function CMD.disconnect()
if initialized then
initialized = false
state = 'running'
ev.emit('terminated')
sendToMaster 'eventThread' {
reason = 'exited'
}
end
end
function CMD.suspend()
suspend = true
end
local function getFuncName(depth)
local funcname = traceback.pushglobalfuncname(info.func)
if funcname then
return funcname
end
if info.what == 'main' then
return '(main)'
end
if info.namewhat == '' then
if luaver.LUAVERSION >= 52
and info.what == "Lua"
and rdebug.getinfo(depth, "t", info)
and info.istailcall
then
return '(...tail calls...)'
end
local previous = {}
if rdebug.getinfo(depth + 1, "S", previous) then
if previous.what == "Lua" or previous.what == "main" then
return '(anonymous function)'
end
if previous.what == "C" then
return '(called from C)'
end
end
return ('(%s ?)'):format(info.what)
end
if info.namewhat == 'for iterator' then
return '(for iterator)'
end
if info.namewhat == 'hook' then
return '(hook)'
end
if info.namewhat == 'metamethod' then
return ('(metamethod %s)'):format(info.name)
end
if info.namewhat == 'field' and info.name == 'integer index' then
return '(field ?)'
end
if info.name == '?' then
return ('(%s ?)'):format(info.namewhat)
end
return info.name
end
local function stackTrace(res, coid, start, levels)
for depth = start, start + levels - 1 do
if not rdebug.getinfo(depth, "Slnf", info) then
return true, depth - start
end
local r = {
id = (coid << 16) | depth,
name = getFuncName(depth),
line = 0,
column = 0,
}
if info.what ~= 'C' then
r.column = 1
local src = source.create(info.source)
if source.valid(src) then
r.line = source.line(src, info.currentline)
r.source = source.output(src)
r.presentationHint = 'normal'
else
r.line = info.currentline
r.presentationHint = 'label'
end
else
r.presentationHint = 'label'
end
res[#res + 1] = r
end
return false, levels
end
local function skipCFunction(res)
for i = #res, 1, -1 do
if res[i].presentationHint ~= "label" or res[i].name ~= "(C ?)" then
break
end
res[i] = nil
end
end
local function coroutineFrom(L)
if hookmgr.coroutine_from then
return coroutineTree[L] or hookmgr.coroutine_from(L)
end
return coroutineTree[L]
end
local function nextTotalFrames(finish, n)
if finish then
return
end
n = n + 0x10
if n >= 0x10000 then
return
end
local p = 64
while p < n do
p = p * 2
end
return p
end
function CMD.stackTrace(pkg)
local start = pkg.startFrame and pkg.startFrame or 0
local levels = (pkg.levels and pkg.levels ~= 0) and pkg.levels or 200
local res = {}
--
-- 在VSCode的实现中这是一帧的第一个请求，所以在这里清理上一帧的数据。
-- 很特殊，但目前也只能这样。
--
if start == 0 and levels == 1 then
cleanFrame()
end
start = start + skipFrame
local L = baseL
local coroutineId = 0
local finish
repeat
hookmgr.sethost(L)
local curL = L
L = coroutineFrom(curL)
if stackFrame[curL] == nil then
local n;
finish, n = stackTrace(res, coroutineId, start, levels)
if not finish then
break
end
if not L then
skipCFunction(res)
break
end
stackFrame[curL] = start + n
start = 0
levels = levels - n
elseif start > stackFrame[curL] then
start = start - stackFrame[curL]
end
coroutineId = coroutineId + 1
until (not L or levels <= 0)
hookmgr.sethost(baseL)
-- TODO 当frames很多时，跳过中间的部分
sendToMaster 'stackTrace' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = {
stackFrames = res,
totalFrames = nextTotalFrames(finish, start + levels),
}
}
end
function CMD.source(pkg)
sendToMaster 'source' {
command = pkg.command,
seq = pkg.seq,
content = source.getCode(pkg.sourceReference),
}
end
local function findFrame(id)
local L = baseL
for _ = 1, id - 1 do
if not L then
return
end
L = coroutineFrom(L)
end
return L
end
function CMD.scopes(pkg)
local coid = (pkg.frameId >> 16) + 1
local depth = pkg.frameId & 0xFFFF
hookmgr.sethost(assert(findFrame(coid)))
sendToMaster 'scopes' {
command = pkg.command,
seq = pkg.seq,
body = {
scopes = variables.scopes(depth)
}
}
end
function CMD.variables(pkg)
local vars, err = variables.extand(pkg.valueId, pkg.filter, pkg.start, pkg.count)
if not vars then
sendToMaster 'variables' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = err,
}
return
end
sendToMaster 'variables' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = {
variables = vars
}
}
end
function CMD.setVariable(pkg)
local var, err = variables.set(pkg.valueId, pkg.name, pkg.value)
if not var then
sendToMaster 'setVariable' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = err,
}
return
end
sendToMaster 'setVariable' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = {
value = var.value,
type = var.type,
}
}
end
function CMD.readMemory(pkg)
local res, err = variables.readMemory(pkg.memoryReference, pkg.offset, pkg.count)
if not res then
sendToMaster 'readMemory' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = err,
}
return
end
sendToMaster 'readMemory' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = res
}
end
function CMD.writeMemory(pkg)
local res, err = variables.writeMemory(pkg.memoryReference, pkg.offset, pkg.data, pkg.allowPartial)
if not res then
sendToMaster 'writeMemory' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = err,
}
return
end
sendToMaster 'writeMemory' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = res
}
end
function CMD.setExpression(pkg)
local depth = pkg.frameId & 0xFFFF
local ok, result = evaluate.set(depth, pkg.expression, pkg.value)
if not ok then
sendToMaster 'setExpression' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = result,
}
return
end
sendToMaster 'setExpression' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = result
}
end
function CMD.evaluate(pkg)
local depth = pkg.frameId & 0xFFFF
local ok, result = evaluate.run(depth, pkg.expression, pkg.context)
if not ok then
sendToMaster 'evaluate' {
command = pkg.command,
seq = pkg.seq,
success = false,
message = result,
}
return
end
sendToMaster 'evaluate' {
command = pkg.command,
seq = pkg.seq,
success = true,
body = result
}
end
function CMD.setBreakpoints(pkg)
if noDebug or not source.valid(pkg.source) then
return
end
breakpoint.set_bp(pkg.source, pkg.breakpoints, pkg.content)
end
function CMD.setFunctionBreakpoints(pkg)
breakpoint.set_funcbp(pkg.breakpoints)
end
function CMD.setExceptionBreakpoints(pkg)
breakpoint.setExceptionBreakpoints(pkg.arguments)
end
function CMD.exceptionInfo(pkg)
sendToMaster 'exceptionInfo' {
command = pkg.command,
seq = pkg.seq,
body = {
breakMode = 'always',
exceptionId = currentException.message,
details = {
stackTrace = currentException.trace,
}
}
}
end
function CMD.loadedSources()
source.all_loaded()
end
function CMD.stop(pkg)
if noDebug then
return
end
state = 'stopped'
stopReason = pkg.reason -- entry or pause
hookmgr.step_in()
end
function CMD.run()
state = 'running'
hookmgr.step_cancel()
end
function CMD.stepOver()
if noDebug then
return
end
state = 'stepOver'
hookmgr.step_over()
end
function CMD.stepIn()
if noDebug then
return
end
state = 'stepIn'
hookmgr.step_in()
end
function CMD.stepOut()
if noDebug then
return
end
state = 'stepOut'
hookmgr.step_out()
end
function CMD.restartFrame()
cleanFrame()
sendToMaster 'eventStop' {
reason = 'restart',
}
end
function CMD.setSearchPath(pkg)
local function set_search_path(name)
if not pkg[name] then
return
end
local value = pkg[name]
if type(value) == 'table' then
local path = {}
for _, v in ipairs(value) do
if type(v) == "string" then
path[#path + 1] = fs.nativepath(v)
end
end
value = table.concat(path, ";")
else
value = fs.nativepath(value)
end
local visitor = rdebug.field(rdebug.field(rdebug._G, "package"), name)
if not rdebug.assign(visitor, value) then
return
end
end
set_search_path "path"
set_search_path "cpath"
end
function CMD.customRequestShowIntegerAsDec()
variables.showIntegerAsDec()
sendToMaster 'eventInvalidated' {
areas = "variables",
}
end
function CMD.customRequestShowIntegerAsHex()
variables.showIntegerAsHex()
sendToMaster 'eventInvalidated' {
areas = "variables",
}
end
local function runLoop(reason, level)
baseL = hookmgr.gethost()
--TODO: 只在lua栈帧时需要text？
sendToMaster 'eventStop' (reason)
skipFrame = level or 0
while true do
workerThreadUpdate(0.01)
if state ~= 'stopped' then
break
end
end
end
local event = {}
local function event_breakpoint(src, line)
if not source.valid(src) then
hookmgr.break_closeline()
return
end
local bp = breakpoint.hit_bp(src, source.line(src, line))
if bp then
state = 'stopped'
runLoop {
reason = 'breakpoint',
hitBreakpointIds = { bp.id }
}
return true
end
end
local function debuggeeReady()
while suspend do
workerThreadUpdate(0.01)
end
if initialized then
return true
end
end
function event.bp(line)
if not debuggeeReady() then return end
rdebug.getinfo(0, "S", info)
local src = source.create(info.source)
event_breakpoint(src, line)
end
function event.funcbp(func)
if not debuggeeReady() then return end
local bp = breakpoint.hit_funcbp(func)
if bp then
state = 'stopped'
runLoop {
reason = 'function breakpoint',
hitBreakpointIds = { bp.id }
}
end
end
function event.step(line)
if not debuggeeReady() then return end
rdebug.getinfo(0, "S", info)
local src = source.create(info.source)
if event_breakpoint(src, line) then
return
end
if not source.valid(src) then
return
end
workerThreadUpdate()
if state == 'running' then
return
elseif state == 'stepOver' or state == 'stepOut' or state == 'stepIn' then
state = 'stopped'
stopReason = 'step'
hookmgr.step_cancel()
end
if state == 'stopped' then
runLoop {
reason = stopReason
}
end
end
function event.newproto(proto, level)
if not debuggeeReady() then return end
rdebug.getinfo(level, "S", info)
local src = source.create(info.source)
if not source.valid(src) then
return false
end
return breakpoint.newproto(proto, src, info.linedefined.."-"..info.lastlinedefined)
end
function event.update()
debuggeeReady()
workerThreadUpdate()
end
function event.autoUpdate(flag)
autoUpdate = flag
hookmgr.update_open(not noDebug and autoUpdate)
end
function event.print(...)
if not debuggeeReady() then return end
local res = {}
local args = table.pack(...)
for i = 1, args.n do
res[#res + 1] = variables.tostring(args[i])
end
res = table.concat(res, '\t')..'\n'
rdebug.getinfo(1, "Sl", info)
stdout(res, info)
return true
end
function event.iowrite(...)
if not debuggeeReady() then return end
local t = {}
local args = table.pack(...)
for i = 1, args.n do
t[#t + 1] = variables.tostring(args[i])
end
local res = table.concat(t, '\t')
rdebug.getinfo(1, "Sl", info)
stdout(res, info)
return true
end
local ERREVENT_ERRRUN <const> = 0x02
local ERREVENT_ERRSYNTAX <const> = 0x03
local ERREVENT_ERRMEM <const> = 0x04
local ERREVENT_ERRERR <const> = 0x05
local ERREVENT_PANIC <const> = 0x10
local function GlobalFunction(name)
return rdebug.value(rdebug.fieldv(rdebug._G, name))
end
local function getExceptionType(errcode)
errcode = errcode & 0xF
if errcode == ERREVENT_ERRRUN then
if rdebug.getinfo(0, "Slf", info) then
if info.what ~= 'C' then
return "runtime"
end
local raisefunc = rdebug.value(info.func)
if raisefunc == GlobalFunction "assert" then
return "assert"
end
if raisefunc == GlobalFunction "error" then
return "error"
end
end
return "other"
elseif errcode == ERREVENT_ERRSYNTAX then
return "syntax"
elseif errcode == ERREVENT_ERRMEM then
return "unknown"
elseif errcode == ERREVENT_ERRERR then
return "unknown"
else
return "unknown"
end
end
local function getExceptionCaught(errcode)
if errcode & ERREVENT_PANIC ~= 0 then
return "panic"
end
local pcall = GlobalFunction 'pcall'
local xpcall = GlobalFunction 'xpcall'
local level = 0
while true do
if not rdebug.getinfo(level, "f", info) then
break
end
if level >= 100 then
return 'native'
end
local f = rdebug.value(info.func)
if f == pcall then
return 'lua'
end
if f == xpcall then
return 'lua'
end
level = level + 1
end
return 'native'
end
local function getExceptionFlags(errcode)
return {
getExceptionType(errcode),
getExceptionCaught(errcode),
}
end
local function runException(flags, errobj)
local errmsg = variables.tostring(errobj)
local level, message, trace = traceback.traceback(flags, errmsg)
if level < 0 then
return
end
local bp = breakpoint.hitExceptionBreakpoint(flags, level, errobj)
if not bp then
return
end
currentException = {
message = message,
trace = trace,
}
state = 'stopped'
runLoop({
reason = 'exception',
hitBreakpointIds = { bp.id },
text = message,
}, level)
end
function event.exception(errobj, errcode)
if not debuggeeReady() then return end
if errcode == nil or errcode == -1 then
--TODO:暂时兼容旧版本
errcode = ERREVENT_ERRRUN
end
runException(getExceptionFlags(errcode), errobj)
end
function event.thread(co, type)
if not debuggeeReady() then return end
local L = hookmgr.gethost()
if co then
if type == 0 then
coroutineTree[L] = co
elseif type == 1 then
coroutineTree[co] = nil
end
end
hookmgr.updatehookmask(L)
end
function event.wait()
suspend = true
debuggeeReady()
end
function event.setThreadName(name)
sendToMaster 'setThreadName' (name)
end
function event.exit()
sendToMaster 'exitWorker' {}
end
hookmgr.init(function(name, ...)
local ok, err = xpcall(function(...)
if event[name] then
return event[name](...)
end
end, debug.traceback, ...)
if not ok then
log.error("ERROR:"..tostring(err))
return
end
return err
end)
local function lst2map(t)
local r = {}
for _, v in ipairs(t) do
r[v] = true
end
return r
end
ev.on('initializing', function(config)
noDebug = config.noDebug
hookmgr.update_open(not noDebug and autoUpdate)
if hookmgr.thread_open then
hookmgr.thread_open(true)
end
outputCapture = lst2map(config.outputCapture)
if outputCapture["print"] then
stdio.open_print(true)
end
if outputCapture["io.write"] then
stdio.open_iowrite(true)
end
end)
ev.on('terminated', function()
hookmgr.step_cancel()
if outputCapture["print"] then
stdio.open_print(false)
end
if outputCapture["io.write"] then
stdio.open_iowrite(false)
end
end)
sendToMaster 'initWorker' {}
hookmgr.update_open(true)