1 //===- raw_pwrite_stream_test.cpp - raw_pwrite_stream tests ---------------===//
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 #include "llvm/ADT/SmallString.h"
10 #include "llvm/Config/llvm-config.h"
11 #include "llvm/Support/FileSystem.h"
12 #include "llvm/Support/FileUtilities.h"
13 #include "llvm/Support/raw_ostream.h"
14 #include "gtest/gtest.h"
15 
16 using namespace llvm;
17 
18 #define ASSERT_NO_ERROR(x)                                                     \
19   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
20     SmallString<128> MessageStorage;                                           \
21     raw_svector_ostream Message(MessageStorage);                               \
22     Message << #x ": did not return errc::success.\n"                          \
23             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
24             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
25     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
26   } else {                                                                     \
27   }
28 
29 namespace {
30 
31 TEST(raw_pwrite_ostreamTest, TestSVector) {
32   SmallVector<char, 0> Buffer;
33   raw_svector_ostream OS(Buffer);
34   OS << "abcd";
35   StringRef Test = "test";
36   OS.pwrite(Test.data(), Test.size(), 0);
37   EXPECT_EQ(Test, OS.str());
38 
39 #ifdef GTEST_HAS_DEATH_TEST
40 #ifndef NDEBUG
41   EXPECT_DEATH(OS.pwrite("12345", 5, 0),
42                "We don't support extending the stream");
43 #endif
44 #endif
45 }
46 
47 #ifdef _WIN32
48 #define setenv(name, var, ignore) _putenv_s(name, var)
49 #endif
50 
51 TEST(raw_pwrite_ostreamTest, TestFD) {
52   SmallString<64> Path;
53   int FD;
54 
55   // If we want to clean up from a death test, we have to remove the file from
56   // the parent process. Have the parent create the file, pass it via
57   // environment variable to the child, let the child crash, and then remove it
58   // in the parent.
59   const char *ParentPath = getenv("RAW_PWRITE_TEST_FILE");
60   if (ParentPath) {
61     Path = ParentPath;
62     ASSERT_NO_ERROR(sys::fs::openFileForRead(Path, FD));
63   } else {
64     ASSERT_NO_ERROR(sys::fs::createTemporaryFile("foo", "bar", FD, Path));
65     setenv("RAW_PWRITE_TEST_FILE", Path.c_str(), true);
66   }
67   FileRemover Cleanup(Path);
68 
69   raw_fd_ostream OS(FD, true);
70   OS << "abcd";
71   StringRef Test = "test";
72   OS.pwrite(Test.data(), Test.size(), 0);
73   OS.pwrite(Test.data(), Test.size(), 0);
74 
75 #ifdef GTEST_HAS_DEATH_TEST
76 #ifndef NDEBUG
77   EXPECT_DEATH(OS.pwrite("12345", 5, 0),
78                "We don't support extending the stream");
79 #endif
80 #endif
81 }
82 
83 #ifdef LLVM_ON_UNIX
84 TEST(raw_pwrite_ostreamTest, TestDevNull) {
85   int FD;
86   sys::fs::openFileForWrite("/dev/null", FD, sys::fs::CD_OpenExisting);
87   raw_fd_ostream OS(FD, true);
88   OS << "abcd";
89   StringRef Test = "test";
90   OS.pwrite(Test.data(), Test.size(), 0);
91   OS.pwrite(Test.data(), Test.size(), 0);
92 }
93 #endif
94 }
95