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2016/08/29
AKIBA.swift×SwiftѪձ
@dealforest
Toshihiro Morimoto
LLDB ͷੈք͔ΒΈͨ Swift
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ࣗݾհ
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Works
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ࠓ iOSDC Ͱ͓ͨ͠͠
༰ͷҰ෦ΛਂງΓ͍͖ͯ͠·͢
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ͦͷલʹେࣄͳ͓ئ͍͕͋Γ·͢
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LLDB ͷϙΧʔʔϯͱͳͬͯ
Ԡ͕ͳ͘൵͘͠ͳΔͷͰ
3ׂΓ૿͠Ͱ͓ئ͍͠·͢!
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Έͳ͞Μ
Swift ͖Ͱ͔͢ʁʁ
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ʔʔʔ͍
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Ͳ͜Ͱ͏ Swift ͕͖Ͱ͔͢ʁʁ
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• iOS Application, Playground, etc..
• Server Side Swift
• Swift Compiler
• Swift Interpliter Language (SIL)
• LLDB
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• iOS Application, Playground, etc..
• Server Side Swift
• Swift Compiler
• Swift Interpliter Language (SIL)
• LLDB
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LLDB ͷੈք͔ΒΈͨ Swift
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࣮ߦ͢Δ
(lldb) p “AKIBA.swift×SwiftѪձ”
(String) $R1 = “AKIBA.swift×SwiftѪձ"
(lldb) po “AKIBA.swift×SwiftѪձ”
“AKIBA.swift×SwiftѪձ”
(lldb) po $R1
“AKIBA.swift×SwiftѪձ”
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มΛఆٛ͢Δ
(lldb) po let $text = “AKIBA.swift×SwiftѪձ"
(lldb) po $text
“AKIBA.swift×SwiftѪձ”
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ؔΛఆٛ͢Δ
// վߦ͢ΔͱΤϥʔʹͳΔͷͰҰߦͰॻ͘͜ͱ
(lldb) po func $getText() -> String {
return “AKIBA.swift×SwiftѪձ”
ɹ}
(lldb) po $getText()
“AKIBA.swift×SwiftѪձ”
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UIImage ΛϑΝΠϧʹग़ྗ͢Δ
(lldb) po let $path = “/Users/dealforest/lldb.png”
(lldb) po let $image = UIImage(named: “sample”)
(lldb) po let $data = UIImagePNGRepresentation($image)!
(lldb) po $data.writeToFile($path, atomically: true)
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LLDB ͷੈք͔ΒݟΔͱ
Կ͕ҧ͏ͷ͔
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ҧ͏
• 1໋ྩ1ߦ
• ຖճ po Λ͚ͭΔඞཁ͕͋Δ
• ࣗͰఆٛͨ͠มΛఆٛɺࢀর͢Δͱ͖ʹ $ Λɹɹɹ
͚ͭΔඞཁ͕͋Δ
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طଘͷ Swift ίʔυΛ
ͦͷ··ͩͱಈ͖·ͤΜ
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ΊΜͲ͍͘͞Ͱ͢Ͷ
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repl Ͱ࣮ߦͯ͠Ε
͜ͷ͋ͨΓͷେମղܾ͠·͢
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͕
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LLDB ͷੈքʹ Swift ͷੈքΛ
࡞Γ্͛ΔͷͰগ͠ҧ͏ؾ͠·͢
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ͦΕʹ͜ͷ··Ͱ
Έͳ͞Μ͏ؾى͖ͳ͍Ͱ͢ΑͶ
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Ͳ͏ʹ͔͍͖ͯ͠·͠ΐ͏
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ؔʹ͢Δ - before
(lldb) po let $path = “/Users/dealforest/lldb.png”
(lldb) po let $image = UIImage(named: “sample”)
(lldb) po let $data = UIImagePNGRepresentation($image)!
(lldb) po $data.writeToFile($path, atomically: true)
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ؔʹ͢Δ - after
// վߦ͢ΔͱΤϥʔʹͳΔͷͰҰߦͰॻ͘͜ͱ
(lldb) po func $saveImage(image: UImage) {
let path = “/Users/dealforest/lldb.png”;
let data = UIImagePNGRepresentation(image)!;
data.writeToFile(path, atomically: true);
}
(lldb) po $saveImage(UIImage(named: “sample”))
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ؔʹ͢Δ
// վߦ͢ΔͱΤϥʔʹͳΔͷͰҰߦͰॻ͘͜ͱ
(lldb) po func $saveImage(image: UImage) {
let path = “/Users/dealforest/lldb.png”;
let data = UIImagePNGRepresentation(image)!;
data.writeToFile(path, atomically: true);
}
(lldb) po $saveImage(UIImage(named: “sample”))
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ͦΕʹɺ͜ͷ··Ͱ
͜ͷؔӬଓԽ͞Ε·ͤΜ
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ຖճఆٛͯ͠͏ͱ͔…
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
frame =
lldb.debugger.GetSelectedTarget().GetProcess().GetSelectedThread().GetSelectedFrame()
result = frame.EvaluateExpression(command)
target = result.GetLocation()
expr = "expr -l objc++ -- (NSData *)UIImagePNGRepresentation((id)" + target + ")"
frame.EvaluateExpression(expr)
imagePath = '/Users/dealforest/lldb.png'
saveImageTemplate = 'expr -l objc++ -- (void) [(NSData *){} writeToFile:@"{}"
atomically:YES];'
saveImageExpr = createImageFormatStr.format(result.GetName(), imagePath)
lldb.debugger.HandleCommand(saveImageExpr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
save_image.py
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LLDB Plugin ʹ͢Δ
command script import /save_image.py
// ͜ΕͰىಈ࣌ʹಡΈࠐ·ΕΔͨΊӬଓԽ͞ΕΔ
~/.lldbinit
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
frame = lldb.debugger.GetSelectedTarget().GetProcess().GetSelectedThread().GetSelectedFrame()
result = frame.EvaluateExpression(command)
target = result.GetLocation()
expr = "expr -l objc++ -- (NSData *)UIImagePNGRepresentation((id)" + target + ")"
frame.EvaluateExpression(expr)
imagePath = '/Users/dealforest/lldb.png'
saveImageTemplate = 'expr -l objc++ -- (void) [(NSData *){} writeToFile:@"{}" atomically:YES];'
saveImageExpr = createImageFormatStr.format(result.GetName(), imagePath)
lldb.debugger.HandleCommand(saveImageExpr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
ίϚϯυͷఆٛ
save_image.py
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
frame = lldb.debugger.GetSelectedTarget().GetProcess().GetSelectedThread().GetSelectedFrame()
result = frame.EvaluateExpression(command)
target = result.GetLocation()
expr = "expr -l objc++ -- (NSData *)UIImagePNGRepresentation((id)" + target + ")"
frame.EvaluateExpression(expr)
imagePath = '/Users/dealforest/lldb.png'
saveImageTemplate = 'expr -l objc++ -- (void) [(NSData *){} writeToFile:@"{}" atomically:YES];'
saveImageExpr = createImageFormatStr.format(result.GetName(), imagePath)
lldb.debugger.HandleCommand(saveImageExpr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
UIImage ͷ pointer Λऔಘ
save_image.py
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
frame = lldb.debugger.GetSelectedTarget().GetProcess().GetSelectedThread().GetSelectedFrame()
result = frame.EvaluateExpression(command)
target = result.GetLocation()
expr = "expr -l objc++ -- (NSData *)UIImagePNGRepresentation((id)" + target + ")"
frame.EvaluateExpression(expr)
imagePath = '/Users/dealforest/lldb.png'
saveImageTemplate = 'expr -l objc++ -- (void) [(NSData *){} writeToFile:@"{}" atomically:YES];'
saveImageExpr = createImageFormatStr.format(result.GetName(), imagePath)
lldb.debugger.HandleCommand(saveImageExpr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
UIImage Λ NSData ʹม
save_image.py
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
frame = lldb.debugger.GetSelectedTarget().GetProcess().GetSelectedThread().GetSelectedFrame()
result = frame.EvaluateExpression(command)
target = result.GetLocation()
expr = "expr -l objc++ -- (NSData *)UIImagePNGRepresentation((id)" + target + ")"
frame.EvaluateExpression(expr)
imagePath = '/Users/dealforest/lldb.png'
saveImageTemplate = 'expr -l objc++ -- (void) [(NSData *){} writeToFile:@"{}" atomically:YES];'
saveImageExpr = createImageFormatStr.format(result.GetName(), imagePath)
lldb.debugger.HandleCommand(saveImageExpr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
NSData ΛϑΝΠϧʹอଘ
save_image.py
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͡Ό͊͜ΕΛؔͰॻ͘ͱ
͜͏ͳΓ·͢
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LLDB Plugin ʹ͢Δ
#!/usr/bin/env python
import lldb
def save_image(debugger, command, result, internal_dict):
lldb.debugger.HandleCommand("""
expr -l swift --
func $saveImage(image: UIImage) {
let $data = UIImagePNGRepresentation($image)!
$data.writeToFile("/Users/dealforest/lldb.png", atomically: true)
}
""".strip())
expr = 'expr -l swift -- $saveImage(' + command + ')'
lldb.debugger.HandleCommand(expr)
def __lldb_init_module(debugger,internal_dict):
debugger.HandleCommand("command script add -f save_image.save_image save_image")
print"save_image command enabled."
save_image.py
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LLDB Plugin ʹ͢Δ
lldb.debugger.HandleCommand("""
expr -l swift --
func $saveImage(image: UIImage) { ɹɹɹɹɹɹɹɹɹ
ɹ let $path = “/Users/dealforest/lldb.png”
let $data = UIImagePNGRepresentation($image)!
$data.writeToFile(path, atomically: true)
}
""".strip())
save_image.py
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͜ͷؔͷதͰ
ݟ׳Εͨ Swift Ͱ͢Ͷ
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࣍ୈͰී௨ʹ Swift ͕
ॻ͚ΔΑ͏ʹͳΓ·͢
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؆୯ʹσόοά༻ͷίϚϯυΛ
࡞Δ͜ͱͰ͖ΔͷͰΦεεϝͰ͢Α
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͍͔͕Ͱ͔ͨ͠ʁʁ
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Swift ͰΘ͍Θ͍͢Δωλʹ
ͳΕΕ͍Ͱ͢
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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠