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Change the invalid address of boost::throws() to 8 from 1, so that it's properly aligned

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Peter Dimov
2018-01-29 02:29:14 +02:00
parent aec8d9056d
commit 0433e561b5
1 changed files with 8 additions and 4 deletions
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12
include/boost/system/error_code.hpp
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@ -578,10 +578,14 @@ namespace boost
inline system::error_code* throws()
{
// See github.com/boostorg/system/pull/12 by visigoth for why the return
// is poisoned with (1) rather than (0). A test, test_throws_usage(), has
// been added to error_code_test.cpp, and as visigoth mentioned it fails
// on clang for release builds with a return of 0 but works fine with (1).
return reinterpret_cast<system::error_code*>(1);
// is poisoned with nonzero rather than (0). A test, test_throws_usage(),
// has been added to error_code_test.cpp, and as visigoth mentioned it
// fails on clang for release builds with a return of 0 but works fine
// with (1).
// Since the undefined behavior sanitizer (-fsanitize=undefined) does not
// allow a reference to be formed to the unaligned address of (1), we use
// (8) instead.
return reinterpret_cast<system::error_code*>(8);
}
}