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[analyzer] Fix a crash in triggered by OSAtomicChecker. 

SValBuilder should return an UnknownVal() when comparison of int and ptr
fails. Previous to this commit, it went on assuming that we are dealing
with pointer arithmetic.

PR12509, radar://11390991

llvm-svn: 156320
This commit is contained in:
Anna Zaks 2012-05-07 19:40:49 +00:00
parent e65f4e66ac
commit 386e832c07
2 changed files with 16 additions and 4 deletions
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1
clang/lib/StaticAnalyzer/Core/SimpleSValBuilder.cpp
View File

@ -875,6 +875,7 @@ SVal SimpleSValBuilder::evalBinOpLN(ProgramStateRef state,
return evalBinOpLL(state, op, lhs, loc::ConcreteInt(*x), resultTy); return evalBinOpLL(state, op, lhs, loc::ConcreteInt(*x), resultTy);
} }
} }
return UnknownVal();
} }
// We are dealing with pointer arithmetic. // We are dealing with pointer arithmetic.

19
clang/test/Analysis/misc-ps.m
View File

@ -1,8 +1,8 @@
// NOTE: Use '-fobjc-gc' to test the analysis being run twice, and multiple reports are not issued. // NOTE: Use '-fobjc-gc' to test the analysis being run twice, and multiple reports are not issued.
// RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync -analyzer-store=region -analyzer-constraints=basic -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s // RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync,osx.AtomicCAS -analyzer-store=region -analyzer-constraints=basic -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s
// RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync -analyzer-store=region -analyzer-constraints=range -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s // RUN: %clang_cc1 -triple i386-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync,osx.AtomicCAS -analyzer-store=region -analyzer-constraints=range -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync -analyzer-store=region -analyzer-constraints=basic -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync,osx.AtomicCAS -analyzer-store=region -analyzer-constraints=basic -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync -analyzer-store=region -analyzer-constraints=range -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s // RUN: %clang_cc1 -triple x86_64-apple-darwin10 -analyze -analyzer-checker=core,experimental.deadcode.IdempotentOperations,experimental.core,osx.cocoa.AtSync,osx.AtomicCAS -analyzer-store=region -analyzer-constraints=range -verify -fblocks -Wno-unreachable-code -Wno-null-dereference -Wno-objc-root-class %s
#ifndef __clang_analyzer__ #ifndef __clang_analyzer__
#error __clang_analyzer__ not defined #error __clang_analyzer__ not defined
@ -494,6 +494,17 @@ int OSAtomicCompareAndSwap32Barrier();
} }
@end @end
// Do not crash when performing compare and swap on symbolic values.
typedef int int32_t;
typedef int int32;
typedef int32 Atomic32;
int OSAtomicCompareAndSwap32( int32_t __oldValue, int32_t __newValue, volatile int32_t *__theValue);
void radar11390991_NoBarrier_CompareAndSwap(volatile Atomic32 *ptr,
Atomic32 old_value,
Atomic32 new_value) {
OSAtomicCompareAndSwap32(old_value, new_value, ptr);
}
// PR 4594 - This was a crash when handling casts in SimpleSValuator. // PR 4594 - This was a crash when handling casts in SimpleSValuator.
void PR4594() { void PR4594() {
char *buf[1]; char *buf[1];