Source Code Analysis for Security through LLVM PDF

Welcome to Objective-C

Objective-C classes are defined in an @interface directive. to a static method in Java. ... Objective-C does not call object methods as Java does.

Factory Pattern

using static methods or abstract factory objects. Objective-C has a powerful pattern called a class cluster that implement the factory pattern right in the

Using static method to measure tolmetin solubility at different

https://doi.org/10.1038/s41598-020-76330-9 www.nature.com/scientificreports. Using static method to measure tolmetin solubility at different.

liOS: Lifting iOS Apps for Fun and Profit

28 mars 2020 Precise automated static analysis of binary iOS applications ... Methods of Objective-C classes are identified by selectors.

Precision and accuracy of the static GNSS method for surveying

GNSS positioning with the static method which gave a global RMSE (root mean square A main objective was to evaluate the precision and ... 1

a practical evaluation of - the gps rapid static method

Marcelo C. Santos Department of Geodesy and Geomatics Engineering The rapid static method is still an attractive method of surveying with GPS.

Unit – III Objective-C Programming

Methods and Selectors. 11. Static and Dynamic Objects. 12. Exception Handling. 13. Memory Management. 14. Required Tools – Xcode iOS Simulator

Finding software bugs with the Clang Static Analyzer

Findings Bugs with Compiler Techniques Clang-based static analysis tool for finding bugs. • Supports C and Objective-C (C++ in the future). Outline.

Topic 3 static Methods and Structured Programming

Clicker 1. What is the name of the method that is called when a Java program starts? A. main. B. static. C. void. D. println. E. class.

Source Code Analysis for Security through LLVM

Static Code Analyzer for Security. (HP Fortify SCA). C/C++. Vulnerabilities Objective-C Static Taint Analyzer ... method signature.

NeXT DEVELOPER’S LIBRARY - GNUstep

Objective-C is implemented as set of extensions to the C language It’s designed to give C a full capability for object-oriented programming and to do so in a simple and straightforward way Its additions to C are few and are mostly based on Smalltalk one of the ?rst object-oriented programming languages

Difference Between Static and Non Static Method

I: The Objective-C Language 2 Programming in Objective-C 7 3 Classes Objects and Methods 27 4 Data Types and Expressions 51 5 Program Looping 71 6 Making Decisions 93 7 More on Classes 127 8 Inheritance 153 9 Polymorphism Dynamic Typing and Dynamic Binding 179 10 More on Variables and Data Types 197

Programming in Objective-C - pearsoncmgcom

Objective-C Object-Oriented Programming Techniques

The Objective-C Language 57 3 1 History and Versions 57 3 2 Relationship to the C Language 58 3 3 Defining Classes 63 Interface Files 63 Implementation Files 65 Adding Methods to a Class: Categories 65 Class Objects 66 The Use of self and super 67 Naming Conventions for Classes Objects and Instance Variables 68

Objective-C Programming: The Big Nerd Ranch Guide

iii Acknowledgments It is a great honor that we get to work with such amazing people Several of them put a lot of time and energy into making this book great

objective c for experienced programmers - Agile Developer

[PDF] The Objective-C Programming Language

Methods of the Root Class Mixing Objective-C and C++ Language Features manual for C presented in The C Programming Language by Brian W Kernighan

[PDF] Objective C - Rose-Hulman

In most languages calling an object?s methods appears as: object method(arguments) ? In Objective C methods are messages that we pass to the object

[PDF] Static Methods

A static method belongs to a class It isn't part of any object You invoke a static method using the class name double root = Math

[PDF] Introduction To Objective-C

Brad Cox created Objective-C in the early 1980s • It was his attempt to add object-oriented programming concepts to the C programming language

[PDF] Unit – III Objective-C Programming - Sathyabama

Objective-C is a general-purpose object-oriented programming language that adds Smalltalk-style messaging to the C programming language

Writing Objective-C Class Methods - Techotopia

1299 $US

[PDF] Objective-C Internals

The Objective-C runtime has a method named class_getMethodImplementation() that given a class object and a selector returns the IMP—the C function

Class method - Apple Developer

6 avr 2018 · Class method A class method is a method that operates on class objects rather than instances of the class In Objective-C a class method

Methods - Objective-C Succinctly Ebook - Syncfusion

7 juil 2014 · This includes an in-depth discussion of instance methods class methods important built-in methods inheritance naming conventions and common

[PDF] Objective-C for Experienced Programmers - Agile Developer

An Object-Oriented extension to C If you're familiar with C/C++/Java syntax you're at home Though you are closer to home if you know C++ :)

What is static method in object oriented programming?

In object oriented programming, static method is a method that is associated with a class. Therefore, static methods do not have the capability to operate on a particular instance of a class. Static methods can be invoked without using an object of the class that contains the static method.

How to define a static method in C# 8?

You can define static methods in C# 8 but you must declare a default body for it. public interface IMyInterface { static string GetHello () => "Default Hello from interface" ; static void WriteWorld () => Console.WriteLine ("Writing World from interface"); } or if you don't want to have any default body simply throw an exception:

How to declare a method in Objective-C?

An Objective-C method declaration includes the parameters as part of its name, using colons, like this: - (void)someMethodWithValue:(SomeType)value; As with the return type, the parameter type is specified in parentheses, just like a standard C type-cast.

What is the difference between static and non static methods?

Static methods are methods that are associated with a class, whereas non static methods are methods that are associated with objects of a class. A class needs to be instantiated first to invoke a non static method, but static methods do not have this requirement. They can be simply invoked using the name of the class that holds the static method.

SourceCodeAnalysisforSecurity

throughLLVM

LuZhao

HPFortify

lu.zhao@hp.com

StaticCodeAnalyzerforSecurity

(HPFortifySCA) C/C++

Vulnerabilities

Java

LLVMLanguageͲindependentServices

C/C++

ObjectiveͲC

Swift 22nd

BitcodeforSourceAnalysis?

C/C++

ObjectiveͲC

Swift

22ndVulns

BitcodeforSourceAnalysis?

[[NSString alloc] initWithContentsOfFile:filePath

encoding:NSUTF8StringEncoding error:&error];NSString *version = [[[NSBundle mainBundle] infoDictionary]

objectForKey:@"CFBundleShortVersionString"];[self.webView loadHTMLString:[NSString stringWithFormat:fileContents, version] baseURL:baseURL]; @end 18 taintsource taintsink

ObjectiveͲCStaticTaintAnalyzer

19 methodsignature.

NodeType: TaintSource

ClassName:NSArray | NSString| NSData |

NSConstantString

MethodSig: arrayWithContentsOfFile: |

or: |initWithContentsOfFile: |

Output:return

TaintFlags: FILE_SYSTEM,XSS

ASourceͲfriendlyIR

20 •Amethodsignature public class NSString extends NSObject { public virtual NSString* initWithContentsOfFile$encoding$error$(

NSString* this, ...);

FromBitcode toSource

int convert(unsigned u) { return 0; } 21
define i32 @convert(i32 %u) #0 { entry: ret i32 0 }!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"convert", metadata !"convert,...} ; [

DW_TAG_subprogram ] [line 25] [def]

[convert]

FromBitcode toSource

NamedMDNode *M_Nodes =

M->getNamedMetadata("llvm.dbg.cu");

DIArray SPs = CU.getSubprograms();

for (unsigned i2 = 1, e2 = SPs.getNumElements(); i2 != e2; ++i2) {

DISubprogram DISP(SPs.getElement(i2));

DICompositeType DIC(DISP.getType());

DIArrayTys= DIC.getTypeArray();

// Tys[0] return type // others are parameter types 22

NoMetadataforDeclarations

extern int convert(unsigned u); 23
declare i32 @convert(i32 %u) #2;

Nometadatadescribing@convert.

NoMetadataforDeclarations

extern int convert(unsigned u); 24
declare i32 @convert(i32 %u) #2;

Metadataemissionisasubprocess duringcode

emission.Nocodegeneration,nometadata.

GenerateBitcodewithRichSourceInfo

25
•Decouplemetadataemissionandcode generation. •ControlrichmetadataemissionbyusingͲgsrc$ clang -gsrc -O0 -c -emit-llvm -S

HtmlViewController.m

Bitcode withRichSourceInfo

declare extern_weak i8* @"-[NSString initWithContentsOfFile:encoding:error:]" (%1*, i8*, %1*, i64, %3**) !1538 = metadata !{i32 786478, metadata !4, metadata !302, metadata !"-[NSString initWithContentsOfFile:encoding:error:]" ,...} ; [ DW_TAG_subprogram ]... 26

Bitcode withRichSourceInfo

Type signature: (NSString*,

objc_selector*, NSString*,

NSStringEncoding, NSError**) ->

NSString*

typedef: NSStringEncoding,

NSUInteger,

long unsigned int 27

ASourceͲfriendlyIR

28
public class NSString extends NSObject { public virtual NSString* initWithContentsOfFile$encoding$error$(

NSString* this, ...);

•NST

BitcodewithEnhancedSourceInfo

C/C++ Swift clang -gsrcclang Vulns taintanalysis

ObjectiveͲC

SmallModificationBigOpportunity

3.3(git diff)

•Upgradingto3.5 30

SmallModificationBigOpportunity

31
C/C++ Swift Vulns taintanalysis

ObjectiveͲCclang -gsrc

swift -gsrc frontend -gsrcquotesdbs_dbs14.pdfusesText_20

[PDF] Source Code Analysis for Security through LLVM

What is static method in object oriented programming?

How to define a static method in C# 8?

How to declare a method in Objective-C?

What is the difference between static and non static methods?

SourceCodeAnalysisforSecurity

LuZhao

HPFortify

StaticCodeAnalyzerforSecurity

StaticCodeAnalyzerforSecurity

Vulnerabilities

LLVMLanguageͲindependentServices

ObjectiveͲC

BitcodeforSourceAnalysis?

ObjectiveͲC

22ndVulns

BitcodeforSourceAnalysis?

ObjectiveͲC

HPFortifySCAforObjectiveͲC

ObjectiveͲC

BitcodewithEnhancedSourceInfo

ObjectiveͲC

BitcodewithEnhancedSourceInfo

ObjectiveͲC

Whywecannotdothistoday?

ObjectiveͲC

ObjectiveͲCStaticTaintAnalyzer

NSString *fileContents =

ObjectiveͲCStaticTaintAnalyzer

NSString *fileContents =

ObjectiveͲCStaticTaintAnalyzer

NSString *fileContents =

ObjectiveͲCStaticTaintAnalyzer

NSString *fileContents =

ObjectiveͲCStaticTaintAnalyzer

NodeType: TaintSource

ClassName:NSArray | NSString| NSData |

NSConstantString

MethodSig: arrayWithContentsOfFile: |

Output:return

TaintFlags: FILE_SYSTEM,XSS

ASourceͲfriendlyIR

NSString* this, ...);

FromBitcode toSource

DW_TAG_subprogram ] [line 25] [def]

FromBitcode toSource

NamedMDNode *M_Nodes =

M->getNamedMetadata("llvm.dbg.cu");

DIArray SPs = CU.getSubprograms();

DISubprogram DISP(SPs.getElement(i2));

DICompositeType DIC(DISP.getType());

DIArrayTys= DIC.getTypeArray();

NoMetadataforDeclarations

Nometadatadescribing@convert.

NoMetadataforDeclarations

Metadataemissionisasubprocess duringcode

GenerateBitcodewithRichSourceInfo

HtmlViewController.m

Bitcode withRichSourceInfo

Bitcode withRichSourceInfo

Type signature: (NSString*,

NSStringEncoding, NSError**) ->

NSString*

NSUInteger,

ASourceͲfriendlyIR

NSString* this, ...);

BitcodewithEnhancedSourceInfo

ObjectiveͲC

SmallModificationBigOpportunity

3.3(git diff)

SmallModificationBigOpportunity

ObjectiveͲCclang -gsrc