forked from OSchip/llvm-project
144 lines
3.1 KiB
Plaintext
144 lines
3.1 KiB
Plaintext
// RUN: %clang_analyze_cc1 -std=c++11 -fblocks -Wno-objc-root-class -analyzer-checker=core,deadcode,debug.ExprInspection -analyzer-config inline-lambdas=true -verify %s
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int clang_analyzer_eval(int);
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@interface Super
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- (void)superMethod;
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@end
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@interface Sub : Super {
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int _ivar1;
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int _ivar2;
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}
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@end
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@implementation Sub
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- (void)callMethodOnSuperInCXXLambda; {
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// Explicit capture.
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[self]() {
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[super superMethod];
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}();
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// Implicit capture.
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[=]() {
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[super superMethod];
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}();
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}
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// Make sure to properly handle super-calls when a block captures
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// a local variable named 'self'.
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- (void)callMethodOnSuperInCXXLambdaWithRedefinedSelf; {
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/*__weak*/ Sub *weakSelf = self;
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// Implicit capture. (Sema outlaws explicit capture of a redefined self
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// and a call to super [which uses the original self]).
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[=]() {
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Sub *self = weakSelf;
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[=]() {
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[super superMethod];
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}();
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}();
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}
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- (void)swapIvars {
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int tmp = _ivar1;
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_ivar1 = _ivar2;
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_ivar2 = tmp;
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}
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- (void)callMethodOnSelfInCXXLambda; {
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_ivar1 = 7;
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_ivar2 = 8;
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[self]() {
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[self swapIvars];
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}();
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clang_analyzer_eval(_ivar1 == 8); // expected-warning{{TRUE}}
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clang_analyzer_eval(_ivar2 == 7); // expected-warning{{TRUE}}
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}
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@end
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int getValue();
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void useValue(int v);
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void castToBlockNoDeadStore() {
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int v = getValue(); // no-warning
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(void)(void(^)())[v]() { // This capture should count as a use, so no dead store warning above.
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};
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}
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void takesBlock(void(^block)());
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void passToFunctionTakingBlockNoDeadStore() {
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int v = 7; // no-warning
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int x = 8; // no-warning
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takesBlock([&v, x]() {
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(void)v;
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});
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}
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void castToBlockAndInline() {
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int result = ((int(^)(int))[](int p) {
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return p;
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})(7);
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clang_analyzer_eval(result == 7); // expected-warning{{TRUE}}
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}
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void castToBlockWithCaptureAndInline() {
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int y = 7;
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auto lambda = [y]{ return y; };
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int(^block)() = lambda;
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int result = block();
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clang_analyzer_eval(result == 7); // expected-warning{{TRUE}}
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}
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void castMutableLambdaToBlock() {
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int x = 0;
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auto lambda = [x]() mutable {
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x = x + 1;
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return x;
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};
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// The block should copy the lambda before capturing.
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int(^block)() = lambda;
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int r1 = block();
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clang_analyzer_eval(r1 == 1); // expected-warning{{TRUE}}
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int r2 = block();
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clang_analyzer_eval(r2 == 2); // expected-warning{{TRUE}}
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// Because block copied the lambda, r3 should be 1.
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int r3 = lambda();
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clang_analyzer_eval(r3 == 1); // expected-warning{{TRUE}}
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// Aliasing the block shouldn't copy the lambda.
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int(^blockAlias)() = block;
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int r4 = blockAlias();
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clang_analyzer_eval(r4 == 3); // expected-warning{{TRUE}}
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int r5 = block();
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clang_analyzer_eval(r5 == 4); // expected-warning{{TRUE}}
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// Another copy of lambda
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int(^blockSecondCopy)() = lambda;
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int r6 = blockSecondCopy();
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clang_analyzer_eval(r6 == 2); // expected-warning{{TRUE}}
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}
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void castLambdaInLocalBlock() {
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// Make sure we don't emit a spurious diagnostic about the address of a block
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// escaping in the implicit conversion operator method for lambda-to-block
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// conversions.
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auto lambda = []{ }; // no-warning
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void(^block)() = lambda;
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(void)block;
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}
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