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Summary: Hi Rafael, Would you be able to review this patch, please? (Clang part of the patch is D15832). When clang runs an external tool, e.g. a linker, it may create a command line that exceeds the length limit. Clang uses the llvm::sys::argumentsFitWithinSystemLimits function to check if command line length fits the OS limitation. There are two problems in this function that may cause exceeding of the limit: 1. It ignores the length of the program path in its calculations. On the other hand, clang adds the program path to the command line when it runs the program. 2. It assumes no space character is inserted after the last argument, which is not true for Windows. The flattenArgs function adds the trailing space for *each* argument. The result of this is that the terminating NULL character is not counted and may be placed beyond the length limit if the command line is exactly 32768 characters long. The WinAPI's CreateProcess does not find the NULL character and fails. Reviewers: rafael, ygao, probinson Subscribers: asl, llvm-commits Differential Revision: http://reviews.llvm.org/D15831 llvm-svn: 256866 |
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| ADT | ||
| Analysis | ||
| AsmParser | ||
| Bitcode | ||
| CodeGen | ||
| Config | ||
| DebugInfo | ||
| ExecutionEngine | ||
| IR | ||
| IRReader | ||
| LibDriver | ||
| LineEditor | ||
| Linker | ||
| LTO | ||
| MC | ||
| Object | ||
| Option | ||
| Passes | ||
| ProfileData | ||
| Support | ||
| TableGen | ||
| Target | ||
| Transforms | ||
| CMakeLists.txt | ||
| InitializePasses.h | ||
| LinkAllIR.h | ||
| LinkAllPasses.h | ||
| module.modulemap | ||
| module.modulemap.build | ||
| Pass.h | ||
| PassAnalysisSupport.h | ||
| PassInfo.h | ||
| PassRegistry.h | ||
| PassSupport.h | ||