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(@Scior)
LLDB
Swift Python
1
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AppBrew
LIPS
iOS PjM
( Keynote)
ࣗݾհ🦙
෩ܠ͖֯ͷਓू·Εʙ📷
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No content
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(lldb) e view.isHidden = false
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Google
UI
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Python
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No content
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( )
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UIView
Save
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UIView
UIView Data
UIGraphicsImageRenderer SBProcess.ReadMemory
Lib/io
LLDB
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(lldb) saveimage imageView /tmp/alpaca.png
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Swift ( )
loadext
DebugExtensions.swift
evaluate
DebugExtensions.swift
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Swift (loadext)
@lldb.command("loadext")
def load(debugger, command, result, dict):
path = os.path.join(os.path.dirname(__file__), 'swift/DebugExtensions.swift')
with open(path, 'r') as f:
common.evaluate(f.read())
* common.evaluate
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DebugExtensions.swift
extension UIView {
func takeSnapshot() -> UIImage? {
let renderer = UIGraphicsImageRenderer(bounds: bounds)
return renderer.image { context in
layer.render(in: context.cgContext)
}
}
func convertToPNGData() -> Data {
return takeSnapshot()!.pngData()!
}
}
ͪΖΜ#if DEBUG ~ #endifͰғͬͯίϯύΠϧͯ͠ྑ͍
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saveimage ( )
saveimage
convertToPNGData() evaluate
convertToPNGData()
DebugExtensions.swift
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saveimage ( )
saveimage
address size
convertToPNGData() evaluate
convertToPNGData()
Data
SBValue
DebugExtensions.swift
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saveimage ( )
@lldb.command("saveimage")
def save_image(debugger, arguments, result, dict):
view, path = arguments.split()
var_name = str(uuid.uuid4()).replace('-', '')
common.evaluate('let $%s = %s.convertToPNGData()' % (var_name, view))
address_str = common.evaluate('($%s as NSData).bytes' % var_name).GetObjectDescription().split()[1]
address = int(address_str, 16)
size = int(common.evaluate('$%s.count' % var_name).GetValue())
process = lldb.debugger.GetSelectedTarget().GetProcess()
error = lldb.SBError()
data = process.ReadMemory(address, size, error)
with open(path, "wb") as f:
f.write(data)
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@lldb.command("saveimage")
def save_image(debugger, arguments, result, dict):
@lldb.command command script add -f LLDB
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convertToPNGData()
common.evaluate('let $%s = %s.convertToPNGData()' % (var_name, view))
let $hoge = imageView.convertToPNGData()
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Data
address_str = common.evaluate('($%s as NSData).bytes' % var_name).GetObjectDescription().split()[1]
address = int(address_str, 16)
size = int(common.evaluate('$%s.count' % var_name).GetValue())
($hoge as NSData).bytes $hoge.count
(Obj-C++ )
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process = lldb.debugger.GetSelectedTarget().GetProcess()
error = lldb.SBError()
data = process.ReadMemory(address, size, error)
with open(path, "wb") as f:
f.write(data)
SBProcess.ReadMemory Python
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* GitHub
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( )
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UIView
Overlay
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UIView
Data UIImage
UnsafeMutablePointer
UIImage.init(data:)
Lib/io
SBProcess.WriteMemory
LLDB
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(lldb) overlayimage imageView /tmp/alpaca.png
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ImageBuffer
final class ImageBuffer {
typealias Pointer = UnsafeMutablePointer
private let size: Int
let pointer: Pointer
init(size: Int) {
self.size = size
pointer = Pointer.allocate(capacity: size)
}
deinit {
pointer.deallocate()
}
func getData() -> Data {
let bufferPointer = UnsafeMutableBufferPointer(start: pointer, count: size)
return .init(buffer: bufferPointer)
}
}
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overlayimage
@lldb.command("overlayimage")
def overlay_image(debugger, arguments, result, dict):
view, path = arguments.split()
with open(path, 'rb') as f:
data = f.read()
buf_name = common.generateVarName()
common.evaluate('let $%s = ImageBuffer(size: %s)' % (buf_name, len(data)))
address_str = common.evaluate('$%s.pointer' % buf_name).GetObjectDescription().split()[1]
address = int(address_str, 16)
process = lldb.debugger.GetSelectedTarget().GetProcess()
error = lldb.SBError()
size = process.WriteMemory(address, data, error)
view_name = common.generateVarName()
common.evaluate('let $%s = DebugOverlayView(frame: %s.frame)' % (view_name, view))
common.evaluate('$%s.set(data: $%s.getData())' % (view_name, buf_name))
common.evaluate(‘%s.superview?.addSubview($%s)' % (view, view_name))
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with open(path, 'rb') as f:
data = f.read()
common.evaluate('let $%s = ImageBuffer(size: %s)' % (buf_name, len(data)))
address_str = common.evaluate('$%s.pointer' % buf_name).GetObjectDescription().split()[1]
address = int(address_str, 16)
ImageBuffer
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process = lldb.debugger.GetSelectedTarget().GetProcess()
error = lldb.SBError()
size = process.WriteMemory(address, data, error)
SBProcess.WriteMemory
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View
common.evaluate('let $%s = DebugOverlayView(frame: %s.frame)' % (view_name, view))
common.evaluate('$%s.set(data: $%s.getData())' % (view_name, buf_name))
common.evaluate(‘%s.superview?.addSubview($%s)' % (view, view_name))
let $view = DebugOverlayView(frame: view.frame)
$view.set(data: $buf.getData())
view.superview?.addSubview($view)
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☺
* GitHub
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With OpenCV and scikit-image (in progress)
View
cv skimage
(UILabel )
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https://github.com/Scior/LLDBVisualDebug
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Appendix
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common.evaluate
def evaluate(exp):
options = lldb.SBExpressionOptions()
options.SetLanguage(lldb.eLanguageTypeSwift)
frame = (
lldb.debugger.GetSelectedTarget()
.GetProcess()
.GetSelectedThread()
.GetSelectedFrame()
)
return frame.EvaluateExpression(exp, options)
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LLDB Python API: https://lldb.llvm.org/python_api.html
facebook/chisel: https://github.com/facebook/chisel
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🦙