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https://github.com/mutouyun/cpp-ipc.git
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52ff081770
ROOT CAUSE: Array placement new (::new(buffer) T[N]) adds a hidden cookie (array size) before the array elements in some compiler implementations (particularly MSVC). The cookie is used for proper array destruction. However, the data_set buffer was sized only for sizeof(T[N]), not accounting for the cookie overhead. ISSUE: - Buffer allocated: sizeof(rand_buf[LoopCount]) - Actual space needed: sizeof(cookie) + sizeof(rand_buf[LoopCount]) - Result: Cookie and part of array written beyond buffer boundary - Consequence: Memory corruption, leading to invalid pointers in buffer objects SYMPTOM: In IPC.1v1 test, memcpy(buf, data, size) crashed because 'data' pointer (from buffer::data()) pointed to corrupted/invalid memory address. SOLUTION: Replace array placement new with individual element placement new: - Cast buffer to array pointer directly (no cookie needed) - Construct each element individually with placement new - Manually destroy each element in destructor This approach: - Eliminates cookie overhead - Provides precise control over object lifetime - Works consistently across all compilers Fixes crash in IPC.1v1 test case on MSVC. |
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| .. | ||
| CMakeLists.txt.old | ||
| test_ipc.cpp | ||
| test_platform.cpp | ||
| test_queue.cpp | ||
| test_shm.cpp | ||
| test_sync.cpp | ||
| test_thread_utility.cpp | ||
| test_waiter.cpp | ||
| test.h | ||
| thread_pool.h | ||