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> |
17 | using namespace llvm; |
18 | using namespace sys; |
19 | |
20 | //===----------------------------------------------------------------------===// |
21 | //=== WARNING: Implementation here must contain only TRULY operating system |
22 | //=== independent code. |
23 | //===----------------------------------------------------------------------===// |
24 | |
25 | static 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 | |
30 | int 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 | |
51 | ProcessInfo 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 | |
67 | bool 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 | |