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
|
//===- ClangSrcLocDump.cpp ------------------------------------*- C++ -*---===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "clang/Basic/Diagnostic.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/JSON.h"
#include "ASTSrcLocProcessor.h"
using namespace clang::tooling;
using namespace clang;
using namespace llvm;
static cl::list<std::string> IncludeDirectories(
"I", cl::desc("Include directories to use while compiling"),
cl::value_desc("directory"), cl::Required, cl::OneOrMore, cl::Prefix);
static cl::opt<bool>
SkipProcessing("skip-processing",
cl::desc("Avoid processing the AST header file"),
cl::Required, cl::value_desc("bool"));
static cl::opt<std::string> JsonOutputPath("json-output-path",
cl::desc("json output path"),
cl::Required,
cl::value_desc("path"));
class ASTSrcLocGenerationAction : public clang::ASTFrontendAction {
public:
ASTSrcLocGenerationAction() : Processor(JsonOutputPath) {}
void ExecuteAction() override {
clang::ASTFrontendAction::ExecuteAction();
if (getCompilerInstance().getDiagnostics().getNumErrors() > 0)
Processor.generateEmpty();
else
Processor.generate();
}
std::unique_ptr<clang::ASTConsumer>
CreateASTConsumer(clang::CompilerInstance &Compiler,
llvm::StringRef File) override {
return Processor.createASTConsumer(Compiler, File);
}
private:
ASTSrcLocProcessor Processor;
};
static const char Filename[] = "ASTTU.cpp";
int main(int argc, const char **argv) {
cl::ParseCommandLineOptions(argc, argv);
if (SkipProcessing) {
std::error_code EC;
llvm::raw_fd_ostream JsonOut(JsonOutputPath, EC, llvm::sys::fs::OF_Text);
if (EC)
return 1;
JsonOut << formatv("{0:2}", llvm::json::Value(llvm::json::Object()));
return 0;
}
std::vector<std::string> Args;
Args.push_back("-cc1");
llvm::transform(IncludeDirectories, std::back_inserter(Args),
[](const std::string &IncDir) { return "-I" + IncDir; });
Args.push_back("-fsyntax-only");
Args.push_back(Filename);
std::vector<const char *> Argv(Args.size(), nullptr);
llvm::transform(Args, Argv.begin(),
[](const std::string &Arg) { return Arg.c_str(); });
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts =
CreateAndPopulateDiagOpts(Argv);
// Don't output diagnostics, because common scenarios such as
// cross-compiling fail with diagnostics. This is not fatal, but
// just causes attempts to use the introspection API to return no data.
TextDiagnosticPrinter DiagnosticPrinter(llvm::nulls(), &*DiagOpts);
DiagnosticsEngine Diagnostics(
IntrusiveRefCntPtr<DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
&DiagnosticPrinter, false);
auto *OFS = new llvm::vfs::OverlayFileSystem(vfs::getRealFileSystem());
auto *MemFS = new llvm::vfs::InMemoryFileSystem();
OFS->pushOverlay(MemFS);
MemFS->addFile(Filename, 0,
MemoryBuffer::getMemBuffer("#include \"clang/AST/AST.h\"\n"));
auto Files = llvm::makeIntrusiveRefCnt<FileManager>(FileSystemOptions(), OFS);
auto Driver = std::make_unique<driver::Driver>(
"clang", llvm::sys::getDefaultTargetTriple(), Diagnostics,
"ast-api-dump-tool", OFS);
std::unique_ptr<clang::driver::Compilation> Comp(
Driver->BuildCompilation(llvm::makeArrayRef(Argv)));
if (!Comp)
return 1;
const auto &Jobs = Comp->getJobs();
if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) {
SmallString<256> error_msg;
llvm::raw_svector_ostream error_stream(error_msg);
Jobs.Print(error_stream, "; ", true);
return 1;
}
const auto &Cmd = cast<driver::Command>(*Jobs.begin());
const llvm::opt::ArgStringList &CC1Args = Cmd.getArguments();
auto Invocation = std::make_unique<CompilerInvocation>();
CompilerInvocation::CreateFromArgs(*Invocation, CC1Args, Diagnostics);
CompilerInstance Compiler(std::make_shared<clang::PCHContainerOperations>());
Compiler.setInvocation(std::move(Invocation));
Compiler.createDiagnostics(&DiagnosticPrinter, false);
if (!Compiler.hasDiagnostics())
return 1;
// Suppress "2 errors generated" or similar messages
Compiler.getDiagnosticOpts().ShowCarets = false;
Compiler.createSourceManager(*Files);
Compiler.setFileManager(Files.get());
ASTSrcLocGenerationAction ScopedToolAction;
Compiler.ExecuteAction(ScopedToolAction);
Files->clearStatCache();
return 0;
}
|
