Fixes are available
APAR status
Closed as program error.
Error description
The following test case segfaults at runtime: ===== COMPILE COMMAND: xlC_r -o tc tc.cpp -q64 -D__IBMCPP_TR1__ ===== TESTCASE: $ cat tc.cpp #include <iostream> #include <memory> #include <unordered_set> int main() { std::auto_ptr<std::tr1::unordered_set<unsigned int> > container(new std::tr1::unordered_set<unsigned int>()); for (unsigned int i = 1; i < 5; i++) { container->clear(); for (unsigned int j = 0; j < 50*i; j++) container->insert(rand()%100000); std::cout << "i =" << i << std::endl; } } ===== ACTUAL OUTPUT: $ ./tc i =1 Segmentation fault (core dumped) ===== EXPECTED OUTPUT: Should not segfault.
Local fix
N/A
Problem summary
USERS AFFECTED: Users who use clear() and in some insertion cases in TR1 set/map and multi set/map maybe affected by this issue. PROBLEM DESCRIPTION: Rehashing can cause buckets to hash to uninitialized memory causing applications to segfault at runtime.
Problem conclusion
The compiler has been fixed to address the issue in the clear() function.
Temporary fix
Comments
APAR Information
APAR number
IZ93241
Reported component name
XLC C++ AIX
Reported component ID
5724S7100
Reported release
900
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2011-01-26
Closed date
2011-02-23
Last modified date
2011-02-23
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
XLC C++ AIX
Fixed component ID
5724S7100
Applicable component levels
R900 PSY U841975
UP C
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Document Information
Modified date:
23 February 2011