Created
April 10, 2022 21:57
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Swift demangler
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import Foundation | |
guard CommandLine.arguments.count > 1 else { | |
print("Please specify object file/executable") | |
exit(EXIT_FAILURE) | |
} | |
var nm = Process() | |
nm.launchPath = "/usr/bin/nm" | |
nm.arguments = [CommandLine.arguments[1]] | |
let pipe = Pipe() | |
nm.standardOutput = pipe.fileHandleForWriting | |
nm.launch() | |
pipe.fileHandleForWriting.closeFile() | |
let output = String(data: pipe.fileHandleForReading.readDataToEndOfFile(), encoding: .utf8)! | |
for line in output.components(separatedBy: "\n").dropLast() { | |
var line = line | |
if let symstart = line.lastIndex(of: " ") { | |
let symrange = line.index(symstart, offsetBy: 1) ..< line.endIndex | |
if let demangled = demangle(symbol: String(line[symrange])) { | |
line += " ==> " + demangled | |
} | |
} | |
print(line) | |
} | |
nm.waitUntilExit() | |
func demangle(symbol: String) -> String? { | |
return symbol.withCString { cString -> String? in | |
if let demangled = _stdlib_demangleImpl(cString, | |
mangledNameLength: UInt(strlen(cString)), | |
outputBuffer: nil, outputBufferSize: nil, flags: 0) ?? | |
__cxa_demangle(cString+1, output_buffer: nil, | |
length: nil, status: nil) { | |
let out = String(cString: demangled) | |
free(demangled) | |
return out | |
} | |
return nil | |
} | |
} | |
@_silgen_name("swift_demangle") | |
privatefunc _stdlib_demangleImpl(_ mangledName: UnsafePointer<Int8>?, mangledNameLength: UInt, outputBuffer: UnsafeMutablePointer<Int8>?, outputBufferSize: UnsafeMutablePointer<UInt>?, flags: UInt32) -> UnsafeMutablePointer<Int8>? | |
@_silgen_name("__cxa_demangle") | |
func __cxa_demangle(_ mangled_name: UnsafePointer<Int8>?, output_buffer: UnsafePointer<Int8>?, length: UnsafeMutablePointer<size_t>?, status: UnsafeMutablePointer<Int32>?) -> UnsafeMutablePointer<Int8>? |
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