Bit-Flip - RAM (hardware) issue where one or more bits have flipped (rare)įor Read or Write issues, refer to the Read or Write episode.įor Execute issues, refer to the Execute episode.Use-After-Free - the address was valid, but is now being accessed after it is freed (data) or unloaded (code).Memory Corruption - the address was mistakenly or maliciously overwritten - commonly via a buffer overrun (or underrun).a function that usually returns a pointer returned NULL (0x0), and the pointer was accessed without verification NULL Pointer - addresses between 0x0 and 0x10000 (64K) - e.g.The memory address may be invalid because of one of these common scenarios: View the Call Stack at the Access Violation.Execute - look at the address of expression.Write - look at the expression on the left of the comma.Read - look at the expression on the right of the comma.Register values at the Access Violation.Parameter - Read (0), Write (1), Execute (8).The second Exception Parameter (1) is the address of the violation.įollow these steps when debugging these issues with the Debugging Tools for Windows: The first Exception Parameter (0) is the type of the violation Read (0), Write (1) or Execute (8) An Access Violation is a type of Exception caused when an application Reads, Writes or Executes an invalid Memory Address.
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