Fix undefined behavior issues #55
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Fixed 3 CRITICAL and 4 HIGH priority undefined behavior issues: CRITICAL FIXES: 1. ltable.cpp:1243 - Added bounds check for bit mask shift (prevent UB when n >= 32) 2. ltable.cpp:730 - Split shift validation into separate checks (prevent shift UB) 3. ltable.cpp:1250 - Added wrap-around assertion for hash table doubling HIGH PRIORITY FIXES: 4. ltable.cpp:707-708 - Added bounds validation for table array reallocation pointer arithmetic 5. lvm_string.cpp:73-74 - Fixed GC safety in string concatenation (recapture stack pointer after GC) 6. lstack.h:118-125 - Eliminated char* round-trip in stack save/restore (direct pointer arithmetic) 7. ltable.cpp:105-136 - Added overflow checks and alignment assertions for NodeArray memory layout ADDITIONAL CHANGES: - Added <cstdint> include for uintptr_t type - All assertions verify safety invariants at runtime TESTING: - All 30+ test files pass: "final OK !!!" - Performance: 4.36s average (4.14s-4.59s range) - Target: ≤4.33s (within normal variance) Status: Phase 116 complete, 7/11 critical+high issues fixed
NiceAndPeter
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Fixed 3 CRITICAL and 4 HIGH priority undefined behavior issues:
CRITICAL FIXES:
HIGH PRIORITY FIXES:
4. ltable.cpp:707-708 - Added bounds validation for table array reallocation pointer arithmetic
5. lvm_string.cpp:73-74 - Fixed GC safety in string concatenation (recapture stack pointer after GC)
6. lstack.h:118-125 - Eliminated char* round-trip in stack save/restore (direct pointer arithmetic)
7. ltable.cpp:105-136 - Added overflow checks and alignment assertions for NodeArray memory layout
ADDITIONAL CHANGES:
TESTING:
Status: Phase 116 complete, 7/11 critical+high issues fixed