1//===-- Program.cpp - Implement OS Program Concept --------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the operating system Program concept.
10//
11//===----------------------------------------------------------------------===//
12
13#include "llvm/Support/Program.h"
14#include "llvm/ADT/StringRef.h"
15#include "llvm/Config/llvm-config.h"
16#include <system_error>
17using namespace llvm;
18using namespace sys;
19
20//===----------------------------------------------------------------------===//
21//=== WARNING: Implementation here must contain only TRULY operating system
22//=== independent code.
23//===----------------------------------------------------------------------===//
24
25static bool Execute(ProcessInfo &PI, StringRef Program,
26 ArrayRef<StringRef> Args, Optional<ArrayRef<StringRef>> Env,
27 ArrayRef<Optional<StringRef>> Redirects,
28 unsigned MemoryLimit, std::string *ErrMsg);
29
30int sys::ExecuteAndWait(StringRef Program, ArrayRef<StringRef> Args,
31 Optional<ArrayRef<StringRef>> Env,
32 ArrayRef<Optional<StringRef>> Redirects,
33 unsigned SecondsToWait, unsigned MemoryLimit,
34 std::string *ErrMsg, bool *ExecutionFailed) {
35 assert(Redirects.empty() || Redirects.size() == 3);
36 ProcessInfo PI;
37 if (Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg)) {
38 if (ExecutionFailed)
39 *ExecutionFailed = false;
40 ProcessInfo Result = Wait(
41 PI, SecondsToWait, /*WaitUntilTerminates=*/SecondsToWait == 0, ErrMsg);
42 return Result.ReturnCode;
43 }
44
45 if (ExecutionFailed)
46 *ExecutionFailed = true;
47
48 return -1;
49}
50
51ProcessInfo sys::ExecuteNoWait(StringRef Program, ArrayRef<StringRef> Args,
52 Optional<ArrayRef<StringRef>> Env,
53 ArrayRef<Optional<StringRef>> Redirects,
54 unsigned MemoryLimit, std::string *ErrMsg,
55 bool *ExecutionFailed) {
56 assert(Redirects.empty() || Redirects.size() == 3);
57 ProcessInfo PI;
58 if (ExecutionFailed)
59 *ExecutionFailed = false;
60 if (!Execute(PI, Program, Args, Env, Redirects, MemoryLimit, ErrMsg))
61 if (ExecutionFailed)
62 *ExecutionFailed = true;
63
64 return PI;
65}
66
67bool sys::commandLineFitsWithinSystemLimits(StringRef Program,
68 ArrayRef<const char *> Args) {
69 SmallVector<StringRef, 8> StringRefArgs;
70 StringRefArgs.reserve(Args.size());
71 for (const char *A : Args)
72 StringRefArgs.emplace_back(A);
73 return commandLineFitsWithinSystemLimits(Program, StringRefArgs);
74}
75
76// Include the platform-specific parts of this class.
77#ifdef LLVM_ON_UNIX
78#include "Unix/Program.inc"
79#endif
80#ifdef _WIN32
81#include "Windows/Program.inc"
82#endif
83