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ace26b380f
When LLVM_PROFILE_FILE is set incorrectly (e.g. multiple %c) and it falls back to use `default.profraw` name, but continuous mode is still set. This might cause signal bus in the following scenario. LLVM_PROFILE_FILE is set incorrectly (with "%c%c") for process A and B. Suppose A starts first and falls back to use `default.profraw` and mmaped its file content to memory. Later B starts and also falls back to use `default.profraw`, but it will truncate the file because online merging is disable when reseting to `default.profraw`. When A tries to update counter via mmaped memory, signal bus will occur. This fixes it by disabling continuous mode when reset to default.profraw.
Compiler-RT ================================ This directory and its subdirectories contain source code for the compiler support routines. Compiler-RT is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. ================================