purify reports uninitialized memory read in _rw_get_char
---------------------------------------------------------
Key: STDCXX-597
URL: https://issues.apache.org/jira/browse/STDCXX-597
Project: C++ Standard Library
Issue Type: Improvement
Components: Test Driver
Reporter: Travis Vitek
Priority: Minor
Fix For: 4.2.1
**** Purify instrumented ./21.string.access (pid 2878) ****
UMR: Uninitialized memory read:
* This is occurring while in thread 2878:
_rw_get_char(char const*, char const**, unsigned*) [char.cpp:562]
rw_match(char const*, char const*, unsigned) [char.cpp:816]
test_access<char, std::char_traits<char>, std::allocator<char> >(char,
std::char_traits<char>*, char*, StringFunc const&, StringTestCase const&)
[21.string.access.cpp:274]
test_access(StringFunc const&, StringTestCase const&)
[21.string.access.cpp:317]
_rw_test_case(StringFunc const&, StringTestCase const&, (*)(StringFunc
const&, StringTestCase const&)) [21.strings.cpp:1298]
_rw_run_cases(StringFunc const&, StringTest const&) [21.strings.cpp:1353]
* Reading 1 byte from 0x8182256 in the heap.
* Address 0x8182256 is 14 bytes into a malloc'd block at 0x8182248 of 46
bytes.
* This block was allocated from thread -1207973632:
malloc [rtlib.o]
operator new(unsigned) [libstd15d.so]
__rw::__rw_allocate(unsigned, int) [memory.cpp:53]
std::allocator<char>::allocate(unsigned, const*) [_allocator.h:144]
std::string<char, std::char_traits<char>,
std::allocator<char>>::_C_get_rep(unsigned, unsigned) [string.cc:102]
std::string<char, std::char_traits<char>,
std::allocator<char>>::string<char, std::char_traits<char>,
std::allocator<char>>[not-in-charge](char const*, unsigned,
std::allocator<char> const&) [string.cc:180]
**** Purify instrumented ./21.string.access (pid 2878) ****
UMR: Uninitialized memory read:
* This is occurring while in thread 2878:
_rw_get_char(char const*, char const**, unsigned*) [char.cpp:562]
rw_match(char const*, char const*, unsigned) [char.cpp:816]
test_access<char, UserTraits<char>, std::allocator<char> >(char,
UserTraits<char>*, char*, StringFunc const&, StringTestCase const&)
[21.string.access.cpp:274]
test_access(StringFunc const&, StringTestCase const&)
[21.string.access.cpp:317]
_rw_test_case(StringFunc const&, StringTestCase const&, (*)(StringFunc
const&, StringTestCase const&)) [21.strings.cpp:1298]
_rw_run_cases(StringFunc const&, StringTest const&) [21.strings.cpp:1353]
* Reading 1 byte from 0x818d5a6 in the heap.
* Address 0x818d5a6 is 14 bytes into a malloc'd block at 0x818d598 of 46
bytes.
* This block was allocated from thread -1207973632:
malloc [rtlib.o]
operator new(unsigned) [libstd15d.so]
__rw::__rw_allocate(unsigned, int) [memory.cpp:53]
std::allocator<char>::allocate(unsigned, const*) [_allocator.h:144]
std::basic_string<char, std::char_traits<char>, std::allocator<char>><char,
UserTraits<char>, std::allocator<char> >::_C_get_rep(unsigned, unsigned)
[string.cc:102]
std::basic_string<char, std::char_traits<char>, std::allocator<char>><char,
UserTraits<char>, std::allocator<char> >::basic_string<char,
std::char_traits<char>, std::allocator<char>>[not-in-charge](char const*,
unsigned, std::allocator<char> const&) [string.cc:180]
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