diff options
Diffstat (limited to 'contrib/llvm/lib/Support/Unix/Program.inc')
| -rw-r--r-- | contrib/llvm/lib/Support/Unix/Program.inc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Support/Unix/Program.inc b/contrib/llvm/lib/Support/Unix/Program.inc index 117151c..aa03d48 100644 --- a/contrib/llvm/lib/Support/Unix/Program.inc +++ b/contrib/llvm/lib/Support/Unix/Program.inc @@ -32,6 +32,9 @@ #if HAVE_FCNTL_H #include <fcntl.h> #endif +#if HAVE_UNISTD_H +#include <unistd.h> +#endif #ifdef HAVE_POSIX_SPAWN #include <spawn.h> #if !defined(__APPLE__) @@ -409,4 +412,25 @@ error_code Program::ChangeStderrToBinary(){ return make_error_code(errc::success); } +bool llvm::sys::argumentsFitWithinSystemLimits(ArrayRef<const char*> Args) { + static long ArgMax = sysconf(_SC_ARG_MAX); + + // System says no practical limit. + if (ArgMax == -1) + return true; + + // Conservatively account for space required by environment variables. + ArgMax /= 2; + + size_t ArgLength = 0; + for (ArrayRef<const char*>::iterator I = Args.begin(), E = Args.end(); + I != E; ++I) { + ArgLength += strlen(*I) + 1; + if (ArgLength > size_t(ArgMax)) { + return false; + } + } + return true; +} + } |
