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32c0c85382
MallocChecker no longer thinks that operator delete() that accepts the size of the object to delete (available since C++14 or under -fsized-deallocation) is some weird user-defined operator. Instead, it handles it like normal delete. Additionally, it exposes a regression in NewDelete-intersections.mm's testStandardPlacementNewAfterDelete() test, where the diagnostic is delayed from before the call of placement new into the code of placement new in the header. This happens because the check for pass-into-function-after-free for placement arguments is located in checkNewAllocator(), which happens after the allocator is inlined, which is too late. Move this use-after-free check into checkPreCall instead, where it works automagically because the guard that prevents it from working is useless and can be removed as well. This commit causes regressions under -analyzer-config c++-allocator-inlining=false but this option is essentially unsupported because the respective feature has been enabled by default quite a while ago. Differential Revision: https://reviews.llvm.org/D53543 llvm-svn: 345802
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
// RUN: %clang_analyze_cc1 -analyzer-checker=core,cplusplus.NewDelete,cplusplus.NewDeleteLeaks,unix.Malloc -std=c++11 -fblocks -verify %s
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// RUN: %clang_analyze_cc1 -analyzer-checker=core,cplusplus.NewDelete,cplusplus.NewDeleteLeaks,unix.Malloc -std=c++11 -fblocks -verify %s -analyzer-config c++-allocator-inlining=false
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#include "Inputs/system-header-simulator-cxx.h"
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// expected-no-diagnostics
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void *allocator(std::size_t size);
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void *operator new[](std::size_t size) throw() { return allocator(size); }
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void *operator new(std::size_t size) throw() { return allocator(size); }
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void *operator new(std::size_t size, const std::nothrow_t ¬hrow) throw() { return allocator(size); }
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void *operator new(std::size_t, double d);
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class C {
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public:
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void *operator new(std::size_t);
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};
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void testNewMethod() {
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void *p1 = C::operator new(0); // no warn
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C *p2 = new C; // no-warning
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C *c3 = ::new C; // no-warning
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}
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void testOpNewArray() {
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void *p = operator new[](0); // call is inlined, no warn
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}
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void testNewExprArray() {
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int *p = new int[0]; // no-warning
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}
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//----- Custom non-placement operators
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void testOpNew() {
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void *p = operator new(0); // call is inlined, no warn
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}
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void testNewExpr() {
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int *p = new int; // no-warning
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}
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//----- Custom NoThrow placement operators
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void testOpNewNoThrow() {
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void *p = operator new(0, std::nothrow); // call is inlined, no warn
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}
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void testNewExprNoThrow() {
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int *p = new(std::nothrow) int; // no-warning
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}
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//----- Custom placement operators
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void testOpNewPlacement() {
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void *p = operator new(0, 0.1); // no warn
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}
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void testNewExprPlacement() {
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int *p = new(0.1) int; // no warn
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}
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