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Pointer escape event notifies checkers that a pointer can no longer be reliably
tracked by the analyzer. For example, if a pointer is passed into a function
that has no body available, or written into a global, MallocChecker would
no longer report memory leaks for such pointer.
In case of operator new() under -analyzer-config c++-allocator-inlining=true,
MallocChecker would start tracking the pointer allocated by operator new()
only to immediately meet a pointer escape event notifying the checker that the
pointer has escaped into a constructor (assuming that the body of the
constructor is not available) and immediately stop tracking it. Even though
it is theoretically possible for such constructor to put "this" into
a global container that would later be freed, we prefer to preserve the old
behavior of MallocChecker, i.e. a memory leak warning, in order to
be able to find any memory leaks in C++ at all. In fact, c++-allocator-inlining
*reduces* the amount of false positives coming from this-pointers escaping in
constructors, because it'd be able to inline constructors in some cases.
With other checkers working similarly, we simply suppress the escape event for
this-value of the constructor, regardless of analyzer options.
Differential Revision: https://reviews.llvm.org/D41797
rdar://problem/12180598
llvm-svn: 322795
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constraint managers
Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952.
Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin
Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D30373
llvm-svn: 296895
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multiple constraint managers"
This reverts commit ea36f1406e1f36bf456c3f3929839b024128e468.
llvm-svn: 296841
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constraint managers
Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952.
Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin
Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D30373
llvm-svn: 296837
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multiple constraint managers"
This reverts commit f93343c099fff646a2314cc7f4925833708298b1.
llvm-svn: 296836
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constraint managers
Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952.
Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin
Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D30373
llvm-svn: 296835
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multiple constraint managers"
This reverts commit 1b28d0b10e1c8feccb971abb6ef7a18bee589830.
llvm-svn: 296422
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constraint managers
Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952.
Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin
Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D30373
llvm-svn: 296414
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constraint managers"
This reverts commit 8e7780b9e59ddaad1800baf533058d2c064d4787.
llvm-svn: 296317
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managers
Summary: Replace calls to %clang/%clang_cc1 with %clang_analyze_cc1 when invoking static analyzer, and perform runtime substitution to select the appropriate constraint manager, per D28952.
Reviewers: xazax.hun, NoQ, zaks.anna, dcoughlin
Subscribers: mgorny, rgov, mikhail.ramalho, a.sidorin, cfe-commits
Differential Revision: https://reviews.llvm.org/D30373
llvm-svn: 296312
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package.
llvm-svn: 220289
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Newly-created unconsumed instance is now assumed escaped if an invoked constructor has an argument of a pointer-to-record type.
llvm-svn: 214909
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