1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
| //===- CIndexer.cpp - Clang-C Source Indexing Library ---------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the Clang-C Source Indexing library.
//
//===----------------------------------------------------------------------===//
#include "CIndexer.h"
#include "CXString.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/Version.h"
#include "clang/Driver/Driver.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/YAMLParser.h"
#include <cstdio>
#include <mutex>
#ifdef __CYGWIN__
#include <cygwin/version.h>
#include <sys/cygwin.h>
#define _WIN32 1
#endif
#ifdef _WIN32
#include <windows.h>
#elif defined(_AIX)
#include <errno.h>
#include <sys/ldr.h>
#else
#include <dlfcn.h>
#endif
using namespace clang;
#ifdef _AIX
namespace clang {
namespace {
template <typename LibClangPathType>
void getClangResourcesPathImplAIX(LibClangPathType &LibClangPath) {
int PrevErrno = errno;
size_t BufSize = 2048u;
std::unique_ptr<char[]> Buf;
while (true) {
Buf = std::make_unique<char []>(BufSize);
errno = 0;
int Ret = loadquery(L_GETXINFO, Buf.get(), (unsigned int)BufSize);
if (Ret != -1)
break; // loadquery() was successful.
if (errno != ENOMEM)
llvm_unreachable("Encountered an unexpected loadquery() failure");
// errno == ENOMEM; try to allocate more memory.
if ((BufSize & ~((-1u) >> 1u)) != 0u)
llvm::report_fatal_error("BufSize needed for loadquery() too large");
Buf.release();
BufSize <<= 1u;
}
// Extract the function entry point from the function descriptor.
uint64_t EntryAddr =
reinterpret_cast<uintptr_t &>(clang_createTranslationUnit);
// Loop to locate the function entry point in the loadquery() results.
ld_xinfo *CurInfo = reinterpret_cast<ld_xinfo *>(Buf.get());
while (true) {
uint64_t CurTextStart = (uint64_t)CurInfo->ldinfo_textorg;
uint64_t CurTextEnd = CurTextStart + CurInfo->ldinfo_textsize;
if (CurTextStart <= EntryAddr && EntryAddr < CurTextEnd)
break; // Successfully located.
if (CurInfo->ldinfo_next == 0u)
llvm::report_fatal_error("Cannot locate entry point in "
"the loadquery() results");
CurInfo = reinterpret_cast<ld_xinfo *>(reinterpret_cast<char *>(CurInfo) +
CurInfo->ldinfo_next);
}
LibClangPath += reinterpret_cast<char *>(CurInfo) + CurInfo->ldinfo_filename;
errno = PrevErrno;
}
} // end anonymous namespace
} // end namespace clang
#endif
const std::string &CIndexer::getClangResourcesPath() {
// Did we already compute the path?
if (!ResourcesPath.empty())
return ResourcesPath;
SmallString<128> LibClangPath;
// Find the location where this library lives (libclang.dylib).
#ifdef _WIN32
MEMORY_BASIC_INFORMATION mbi;
char path[MAX_PATH];
VirtualQuery((void *)(uintptr_t)clang_createTranslationUnit, &mbi,
sizeof(mbi));
GetModuleFileNameA((HINSTANCE)mbi.AllocationBase, path, MAX_PATH);
#ifdef __CYGWIN__
char w32path[MAX_PATH];
strcpy(w32path, path);
#if CYGWIN_VERSION_API_MAJOR > 0 || CYGWIN_VERSION_API_MINOR >= 181
cygwin_conv_path(CCP_WIN_A_TO_POSIX, w32path, path, MAX_PATH);
#else
cygwin_conv_to_full_posix_path(w32path, path);
#endif
#endif
LibClangPath += path;
#elif defined(_AIX)
getClangResourcesPathImplAIX(LibClangPath);
#else
// This silly cast below avoids a C++ warning.
Dl_info info;
if (dladdr((void *)(uintptr_t)clang_createTranslationUnit, &info) == 0)
llvm_unreachable("Call to dladdr() failed");
// We now have the CIndex directory, locate clang relative to it.
LibClangPath += info.dli_fname;
#endif
// Cache our result.
ResourcesPath = driver::Driver::GetResourcesPath(LibClangPath);
return ResourcesPath;
}
StringRef CIndexer::getClangToolchainPath() {
if (!ToolchainPath.empty())
return ToolchainPath;
StringRef ResourcePath = getClangResourcesPath();
ToolchainPath = llvm::sys::path::parent_path(
llvm::sys::path::parent_path(llvm::sys::path::parent_path(ResourcePath)));
return ToolchainPath;
}
LibclangInvocationReporter::LibclangInvocationReporter(
CIndexer &Idx, OperationKind Op, unsigned ParseOptions,
llvm::ArrayRef<const char *> Args,
llvm::ArrayRef<std::string> InvocationArgs,
llvm::ArrayRef<CXUnsavedFile> UnsavedFiles) {
StringRef Path = Idx.getInvocationEmissionPath();
if (Path.empty())
return;
// Create a temporary file for the invocation log.
SmallString<256> TempPath;
TempPath = Path;
llvm::sys::path::append(TempPath, "libclang-%%%%%%%%%%%%");
int FD;
if (llvm::sys::fs::createUniqueFile(TempPath, FD, TempPath))
return;
File = std::string(TempPath.begin(), TempPath.end());
llvm::raw_fd_ostream OS(FD, /*ShouldClose=*/true);
// Write out the information about the invocation to it.
auto WriteStringKey = [&OS](StringRef Key, StringRef Value) {
OS << R"(")" << Key << R"(":")";
OS << llvm::yaml::escape(Value) << '"';
};
OS << '{';
WriteStringKey("toolchain", Idx.getClangToolchainPath());
OS << ',';
WriteStringKey("libclang.operation",
Op == OperationKind::ParseOperation ? "parse" : "complete");
OS << ',';
OS << R"("libclang.opts":)" << ParseOptions;
OS << ',';
OS << R"("args":[)";
for (const auto &I : llvm::enumerate(Args)) {
if (I.index())
OS << ',';
OS << '"' << llvm::yaml::escape(I.value()) << '"';
}
if (!InvocationArgs.empty()) {
OS << R"(],"invocation-args":[)";
for (const auto &I : llvm::enumerate(InvocationArgs)) {
if (I.index())
OS << ',';
OS << '"' << llvm::yaml::escape(I.value()) << '"';
}
}
if (!UnsavedFiles.empty()) {
OS << R"(],"unsaved_file_hashes":[)";
for (const auto &UF : llvm::enumerate(UnsavedFiles)) {
if (UF.index())
OS << ',';
OS << '{';
WriteStringKey("name", UF.value().Filename);
OS << ',';
llvm::MD5 Hash;
Hash.update(getContents(UF.value()));
llvm::MD5::MD5Result Result;
Hash.final(Result);
SmallString<32> Digest = Result.digest();
WriteStringKey("md5", Digest);
OS << '}';
}
}
OS << "]}";
}
LibclangInvocationReporter::~LibclangInvocationReporter() {
if (!File.empty())
llvm::sys::fs::remove(File);
}
|