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ab2172cc97
Added swift::ExecuteInPlace(), which on Unix acts as a wrapper for execv() and execve(). On other platforms, swift::ExecuteInPlace() is a wrapper for llvm::sys::ExecuteAndWait(), so callers must be prepared for ExecuteInPlace() to return in a non-error situation. Added support in Compilation::performJobs() to detect that the Compilation has exactly one Command to run. If that's the case, and buffered output isn't required, execute that Command using swift::ExecuteInPlace() (instead of creating a TaskQueue, which may unconditionally buffer output). This change will allow the driver to invoke the frontend's REPL and immediate modes without buffering output (and, on Unix, without a separate process being spawned). Also updated test/Driver/basic.swift to emit output with these changes in place. Swift SVN r12544
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
//===-- Program.cpp - Implement OS Program Concept --------------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include "swift/Basic/Program.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/Program.h"
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#if LLVM_ON_UNIX
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#endif
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int swift::ExecuteInPlace(const char *Program, const char **args,
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const char **env) {
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#if LLVM_ON_UNIX
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int result;
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if (env)
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result = execve(Program, const_cast<char **>(args),
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const_cast<char **>(env));
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else
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result = execv(Program, const_cast<char **>(args));
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return result;
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#else
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return llvm::sys::ExecuteAndWait(Program, args, env);
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#endif
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}
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