Removing strncpy() checking in CString checker for now. Some significant changes need to be made to properly support modeling of it since it potentially leaves strings non-null terminated.

llvm-svn: 130758

Augment retain/release checker to not warn about tracked objects passed as arguments to C++ constructors.  This is a stop-gap measure for Objective-C++ code that uses smart pointers to manage reference counts.

llvm-svn: 130711

Implements strncasecmp() checker and simplifies some of the logic around creating substrings if necessary and calling the appropriate StringRef::compare/compare_lower().

llvm-svn: 130708

llvm-svn: 130598

Use StringRef::substr() and unbounded StringRef::compare() instead of bounded version of StringRef::compare() because bounded version of StringRef::compare() is going to be removed.

llvm-svn: 130425

Eliminates an assert in the strncpy/strncat checker caused by not validating a cast was successful. If the value of an argument was unknown, the cast would result in a NULL pointer which was later being dereferenced.

This fixes Bugzilla #9806.

llvm-svn: 130422

llvm-svn: 130398

More accurately model realloc() when the size argument is 0. realloc() with a size of 0 is equivalent to free(). The memory region should be marked as free and not used again.

Unit tests f2_realloc_0(), f6_realloc(), and f7_realloc() contributed by Marshall Clow <mclow.lists@gmail.com>. Thanks! 

llvm-svn: 130303

Allow 'Environment::getSVal()' to allow an optional way for checkers to do a direct lookup to values bound to expressions, without
resulting to lazy logic.  This is critical for the OSAtomicChecker that does a simulated load on any arbitrary expression.

llvm-svn: 130292

Implements the strncmp() checker just like the strcmp() checker, but with bounds. Requires LLVM svn r129582.

llvm-svn: 130161

llvm-svn: 130068

llvm-svn: 129741

llvm-svn: 129567

Luis Felipe Strano Moraes!

llvm-svn: 129559

llvm-svn: 129395

Fix another IdempotentOperationsChecker corner case when determining if an active block on the worklist
impacts the results of the check.

llvm-svn: 129394

ArrayBoundCheckerV2: don't arbitrarily warn about indexing before the 0-index of a symbolic region.  In many cases that isn't really the base offset.

llvm-svn: 129366

This patch adds modeling of strcmp() to the CString checker. Validates inputs are not NULL and are real C strings, then does the comparison and binds the proper return value. Unit tests included. 

llvm-svn: 129364

Validates inputs are not NULL, checks for overlapping strings, concatenates the strings checking for buffer overflow, sets the length of the destination string to the sum of the s1 length and the s2 length, binds the return value to the s1 value.

llvm-svn: 129215

Add security syntax checker for strcat() which causes the Static Analyzer to generate a warning any time the strcat() function is used with a note suggesting to use a function which provides bounded buffers. CWE-119.

Also, brings the security syntax checker more inline with coding standards.

llvm-svn: 128916

Refactoring the security checker a little bit so that each CallExpr check doesn't get called for each CallExpr. Instead it does a switch and only runs the check for the proper identifier. Slight speed improvement (probably significant on very large ASTs), and should make it easier and more clear to add more checks for other CallExpr's later.

llvm-svn: 128785

llvm-svn: 128762

Teach IdempotentOperationsChecker about paths aborted because ExprEngine didn't know how to handle a specific Expr type.

llvm-svn: 128761

static analyzer: Rename 'BlocksAborted' to 'BlocksExhausted' to reflect that a given CFGBlock was analyzed too many times.

llvm-svn: 128760

Add security syntax checker for strcpy() which causes the Static Analyzer to generate a warning any time the strcpy() function is used with a note suggesting to use a function which provides bounded buffers. 

llvm-svn: 128679

Models mempcpy() so that if length is NULL the destination pointer is returned. Otherwise, the source and destination are confirmed not to be NULL and not overlapping. Finally the copy is validated to not cause a buffer overrun and the return value is bound to the address of the byte after the last byte copied.

llvm-svn: 128677

llvm-svn: 128670

llvm-svn: 128512

[analyzer] For -analyzer-checker-help show all the info about groups, packages, and which packages/checkers are hidden.

llvm-svn: 128511

llvm-svn: 128475

llvm-svn: 128310

llvm-svn: 128187

This rename serves two purposes:

- It reflects the actual functionality of this analysis.
- We will have more than one reachability analysis.

llvm-svn: 127930

llvm-svn: 127798

Teach VariadicMethodTypeChecker that CF references are valid arguments to variadic Objective-C methods.

llvm-svn: 127797

VariadicMethodTypeChecker: don't warn for null pointer constants passed to variadic Objective-C methods.

llvm-svn: 127719

llvm-svn: 127687

Tweak VariadicMethodTypeChecker to only create one ExplodedNode when issuing multiple warnings for the same message expression.

Also add a test case showing that we correctly report multiple warnings for the same message expression.

llvm-svn: 127605

Add an Objective-C checker that checks that arguments passed to some variadic Objective-C methods are of Objective-C pointer types.

Ted or Argiris, I'd appreciate a review!

llvm-svn: 127572

Re-enable the IdempotentOperations checker for --analyze, and put it and the DeadStores checker into the "deadcode" group.

llvm-svn: 127531