Merge "Add CC analysis support to ide_query" into main

13 files changed, 1262 insertions, 149 deletions

diff --git a/tools/ide_query/cc_analyzer/Android.bp b/tools/ide_query/cc_analyzer/Android.bp
new file mode 100644
index 0000000000..3cbbb0587f
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/Android.bp
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_defaults {
+    name: "ide_query_cc_analyzer_defaults",
+    compile_multilib: "64",
+    defaults: [
+        "llvm-build-host-tools-defaults",
+    ],
+    cflags: [
+        // LLVM Sources do have unused parameters :(
+        "-Wno-unused-parameter",
+    ],
+    target: {
+        host: {
+            cppflags: [
+                "-fno-rtti",
+            ],
+        },
+    },
+}
+
+cc_library_host_static {
+    name: "builtin_headers",
+    srcs: ["builtin_headers.cc"],
+    generated_headers: ["clang_builtin_headers_resources"],
+    defaults: ["ide_query_cc_analyzer_defaults"],
+}
+
+cc_library_host_static {
+    name: "include_scanner",
+    srcs: ["include_scanner.cc"],
+    shared_libs: ["libclang-cpp_host"],
+    static_libs: ["builtin_headers"],
+    defaults: ["ide_query_cc_analyzer_defaults"],
+}
+
+cc_library_host_static {
+    name: "analyzer",
+    srcs: ["analyzer.cc"],
+    shared_libs: ["libclang-cpp_host"],
+    static_libs: [
+        "include_scanner",
+        "ide_query_proto",
+    ],
+    defaults: ["ide_query_cc_analyzer_defaults"],
+}
+
+cc_binary_host {
+    name: "ide_query_cc_analyzer",
+    defaults: ["ide_query_cc_analyzer_defaults"],
+    srcs: ["main.cc"],
+    shared_libs: [
+        "libclang-cpp_host",
+        "libprotobuf-cpp-full",
+    ],
+    static_libs: [
+        "ide_query_proto",
+        "builtin_headers",
+        "include_scanner",
+        "analyzer",
+    ],
+}
diff --git a/tools/ide_query/cc_analyzer/analyzer.cc b/tools/ide_query/cc_analyzer/analyzer.cc
new file mode 100644
index 0000000000..8cc07e81ba
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/analyzer.cc
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "analyzer.h"
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Tooling/JSONCompilationDatabase.h"
+#include "ide_query.pb.h"
+#include "include_scanner.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/VirtualFileSystem.h"
+
+namespace tools::ide_query::cc_analyzer {
+namespace {
+llvm::Expected<std::unique_ptr<clang::tooling::CompilationDatabase>> LoadCompDB(
+    llvm::StringRef comp_db_path) {
+  std::string err;
+  std::unique_ptr<clang::tooling::CompilationDatabase> db =
+      clang::tooling::JSONCompilationDatabase::loadFromFile(
+          comp_db_path, err, clang::tooling::JSONCommandLineSyntax::AutoDetect);
+  if (!db) {
+    return llvm::createStringError(llvm::inconvertibleErrorCode(),
+                                   "Failed to load CDB: " + err);
+  }
+  // Provide some heuristic support for missing files.
+  return inferMissingCompileCommands(std::move(db));
+}
+}  // namespace
+
+::ide_query::DepsResponse GetDeps(::ide_query::RepoState state) {
+  ::ide_query::DepsResponse results;
+  auto db = LoadCompDB(state.comp_db_path());
+  if (!db) {
+    results.mutable_status()->set_code(::ide_query::Status::FAILURE);
+    results.mutable_status()->set_message(llvm::toString(db.takeError()));
+    return results;
+  }
+  for (llvm::StringRef active_file : state.active_file_path()) {
+    auto& result = *results.add_deps();
+
+    llvm::SmallString<256> abs_file(state.repo_dir());
+    llvm::sys::path::append(abs_file, active_file);
+    auto cmds = db->get()->getCompileCommands(active_file);
+    if (cmds.empty()) {
+      result.mutable_status()->set_code(::ide_query::Status::FAILURE);
+      result.mutable_status()->set_message(
+          llvm::Twine("Can't find compile flags for file: ", abs_file).str());
+      continue;
+    }
+    result.set_source_file(active_file.str());
+    llvm::StringRef file = cmds[0].Filename;
+    if (llvm::StringRef actual_file(cmds[0].Heuristic);
+        actual_file.consume_front("inferred from ")) {
+      file = actual_file;
+    }
+    // TODO: Query ninja graph to figure out a minimal set of targets to build.
+    result.add_build_target(file.str() + "^");
+  }
+  return results;
+}
+
+::ide_query::IdeAnalysis GetBuildInputs(::ide_query::RepoState state) {
+  auto db = LoadCompDB(state.comp_db_path());
+  ::ide_query::IdeAnalysis results;
+  if (!db) {
+    results.mutable_status()->set_code(::ide_query::Status::FAILURE);
+    results.mutable_status()->set_message(llvm::toString(db.takeError()));
+    return results;
+  }
+  std::string repo_dir = state.repo_dir();
+  if (!repo_dir.empty() && repo_dir.back() == '/') repo_dir.pop_back();
+
+  llvm::SmallString<256> genfile_root_abs(repo_dir);
+  llvm::sys::path::append(genfile_root_abs, state.out_dir());
+  if (genfile_root_abs.empty() || genfile_root_abs.back() != '/') {
+    genfile_root_abs.push_back('/');
+  }
+
+  results.set_build_artifact_root(state.out_dir());
+  for (llvm::StringRef active_file : state.active_file_path()) {
+    auto& result = *results.add_sources();
+    result.set_path(active_file.str());
+
+    llvm::SmallString<256> abs_file(repo_dir);
+    llvm::sys::path::append(abs_file, active_file);
+    auto cmds = db->get()->getCompileCommands(abs_file);
+    if (cmds.empty()) {
+      result.mutable_status()->set_code(::ide_query::Status::FAILURE);
+      result.mutable_status()->set_message(
+          llvm::Twine("Can't find compile flags for file: ", abs_file).str());
+      continue;
+    }
+    const auto& cmd = cmds.front();
+    llvm::StringRef working_dir = cmd.Directory;
+    if (!working_dir.consume_front(repo_dir)) {
+      result.mutable_status()->set_code(::ide_query::Status::FAILURE);
+      result.mutable_status()->set_message("Command working dir " +
+                                           working_dir.str() +
+                                           "outside repository " + repo_dir);
+      continue;
+    }
+    working_dir = working_dir.ltrim('/');
+    result.set_working_dir(working_dir.str());
+    for (auto& arg : cmd.CommandLine) result.add_compiler_arguments(arg);
+
+    auto includes =
+        ScanIncludes(cmds.front(), llvm::vfs::createPhysicalFileSystem());
+    if (!includes) {
+      result.mutable_status()->set_code(::ide_query::Status::FAILURE);
+      result.mutable_status()->set_message(
+          llvm::toString(includes.takeError()));
+      continue;
+    }
+
+    for (auto& [req_input, contents] : *includes) {
+      llvm::StringRef req_input_ref(req_input);
+      // We're only interested in generated files.
+      if (!req_input_ref.consume_front(genfile_root_abs)) continue;
+      auto& genfile = *result.add_generated();
+      genfile.set_path(req_input_ref.str());
+      genfile.set_contents(std::move(contents));
+    }
+  }
+  return results;
+}
+}  // namespace tools::ide_query::cc_analyzer
diff --git a/tools/ide_query/cc_analyzer/analyzer.h b/tools/ide_query/cc_analyzer/analyzer.h
new file mode 100644
index 0000000000..3133795217
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/analyzer.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _TOOLS_IDE_QUERY_CC_ANALYZER_ANALYZER_H_
+#define _TOOLS_IDE_QUERY_CC_ANALYZER_ANALYZER_H_
+
+#include "ide_query.pb.h"
+
+namespace tools::ide_query::cc_analyzer {
+
+// Scans the build graph and returns target names from the build graph to
+// generate all the dependencies for the active files.
+::ide_query::DepsResponse GetDeps(::ide_query::RepoState state);
+
+// Scans the sources and returns all the source files required for analyzing the
+// active files.
+::ide_query::IdeAnalysis GetBuildInputs(::ide_query::RepoState state);
+
+}  // namespace tools::ide_query::cc_analyzer
+
+#endif
diff --git a/tools/ide_query/cc_analyzer/builtin_headers.cc b/tools/ide_query/cc_analyzer/builtin_headers.cc
new file mode 100644
index 0000000000..6d44ce7d27
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/builtin_headers.cc
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "builtin_headers.h"
+
+#include <cstddef>
+
+#include "clang_builtin_headers_resources.inc"
+
+const struct FileToc *builtin_headers_create() { return kPackedFiles; }
+size_t builtin_headers_size() {
+  return sizeof(kPackedFiles) / sizeof(FileToc) - 1;
+}
diff --git a/tools/ide_query/cc_analyzer/builtin_headers.h b/tools/ide_query/cc_analyzer/builtin_headers.h
new file mode 100644
index 0000000000..eda722fe1c
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/builtin_headers.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef _TOOLS_IDE_QUERY_CC_ANALYZER_BUILTIN_HEADERS_H_
+#define _TOOLS_IDE_QUERY_CC_ANALYZER_BUILTIN_HEADERS_H_
+
+#include <cstddef>
+
+struct FileToc {
+  const char *name;
+  const char *data;
+};
+
+const struct FileToc *builtin_headers_create();
+size_t builtin_headers_size();
+
+#endif
diff --git a/tools/ide_query/cc_analyzer/include_scanner.cc b/tools/ide_query/cc_analyzer/include_scanner.cc
new file mode 100644
index 0000000000..8916a3edd6
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/include_scanner.cc
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "include_scanner.h"
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <utility>
+#include <vector>
+
+#include "builtin_headers.h"
+#include "clang/Basic/FileEntry.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/Module.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendActions.h"
+#include "clang/Lex/PPCallbacks.h"
+#include "clang/Tooling/ArgumentsAdjusters.h"
+#include "clang/Tooling/CompilationDatabase.h"
+#include "clang/Tooling/Tooling.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/VirtualFileSystem.h"
+
+namespace tools::ide_query::cc_analyzer {
+namespace {
+std::string CleanPath(llvm::StringRef path) {
+  // both ./ and ../ has `./` in them.
+  if (!path.contains("./")) return path.str();
+  llvm::SmallString<256> clean_path(path);
+  llvm::sys::path::remove_dots(clean_path, /*remove_dot_dot=*/true);
+  return clean_path.str().str();
+}
+
+// Returns the absolute path to file_name, treating it as relative to cwd if it
+// isn't already absolute.
+std::string GetAbsolutePath(llvm::StringRef cwd, llvm::StringRef file_name) {
+  if (llvm::sys::path::is_absolute(file_name)) return CleanPath(file_name);
+  llvm::SmallString<256> abs_path(cwd);
+  llvm::sys::path::append(abs_path, file_name);
+  llvm::sys::path::remove_dots(abs_path, /*remove_dot_dot=*/true);
+  return abs_path.str().str();
+}
+
+class IncludeRecordingPP : public clang::PPCallbacks {
+ public:
+  explicit IncludeRecordingPP(
+      std::unordered_map<std::string, std::string> &abs_paths, std::string cwd,
+      const clang::SourceManager &sm)
+      : abs_paths_(abs_paths), cwd_(std::move(cwd)), sm_(sm) {}
+
+  void LexedFileChanged(clang::FileID FID, LexedFileChangeReason Reason,
+                        clang::SrcMgr::CharacteristicKind FileType,
+                        clang::FileID PrevFID,
+                        clang::SourceLocation Loc) override {
+    auto file_entry = sm_.getFileEntryRefForID(FID);
+    if (!file_entry) return;
+    auto abs_path = GetAbsolutePath(cwd_, file_entry->getName());
+    auto [it, inserted] = abs_paths_.try_emplace(abs_path);
+    if (inserted) it->second = sm_.getBufferData(FID);
+  }
+
+  std::unordered_map<std::string, std::string> &abs_paths_;
+  const std::string cwd_;
+  const clang::SourceManager &sm_;
+};
+
+class IncludeScanningAction final : public clang::PreprocessOnlyAction {
+ public:
+  explicit IncludeScanningAction(
+      std::unordered_map<std::string, std::string> &abs_paths)
+      : abs_paths_(abs_paths) {}
+  bool BeginSourceFileAction(clang::CompilerInstance &ci) override {
+    std::string cwd;
+    auto cwd_or_err = ci.getVirtualFileSystem().getCurrentWorkingDirectory();
+    if (!cwd_or_err || cwd_or_err.get().empty()) return false;
+    cwd = cwd_or_err.get();
+    ci.getPreprocessor().addPPCallbacks(std::make_unique<IncludeRecordingPP>(
+        abs_paths_, std::move(cwd), ci.getSourceManager()));
+    return true;
+  }
+
+ private:
+  std::unordered_map<std::string, std::string> &abs_paths_;
+};
+
+llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> OverlayBuiltinHeaders(
+    std::vector<std::string> &argv,
+    llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> base) {
+  static constexpr llvm::StringLiteral kResourceDir = "/resources";
+  llvm::IntrusiveRefCntPtr<llvm::vfs::OverlayFileSystem> overlay(
+      new llvm::vfs::OverlayFileSystem(std::move(base)));
+  llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> builtin_headers(
+      new llvm::vfs::InMemoryFileSystem);
+
+  llvm::SmallString<256> file_path;
+  for (const auto &builtin_header :
+       llvm::ArrayRef(builtin_headers_create(), builtin_headers_size())) {
+    file_path.clear();
+    llvm::sys::path::append(file_path, kResourceDir, "include",
+                            builtin_header.name);
+    builtin_headers->addFile(
+        file_path,
+        /*ModificationTime=*/0,
+        llvm::MemoryBuffer::getMemBuffer(builtin_header.data));
+  }
+  overlay->pushOverlay(std::move(builtin_headers));
+  argv.insert(llvm::find(argv, "--"),
+              llvm::Twine("-resource-dir=", kResourceDir).str());
+  return overlay;
+}
+
+}  // namespace
+
+llvm::Expected<std::vector<std::pair<std::string, std::string>>> ScanIncludes(
+    const clang::tooling::CompileCommand &cmd,
+    llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> fs) {
+  if (fs->setCurrentWorkingDirectory(cmd.Directory)) {
+    return llvm::createStringError(
+        llvm::inconvertibleErrorCode(),
+        "Failed to set working directory to: " + cmd.Directory);
+  }
+
+  auto main_file = fs->getBufferForFile(cmd.Filename);
+  if (!main_file) {
+    return llvm::createStringError(llvm::inconvertibleErrorCode(),
+                                   "Main file doesn't exist: " + cmd.Filename);
+  }
+  std::unordered_map<std::string, std::string> abs_paths;
+  abs_paths.try_emplace(GetAbsolutePath(cmd.Directory, cmd.Filename),
+                        main_file.get()->getBuffer().str());
+
+  std::vector<std::string> argv = cmd.CommandLine;
+  fs = OverlayBuiltinHeaders(argv, std::move(fs));
+
+  llvm::IntrusiveRefCntPtr<clang::FileManager> files(
+      new clang::FileManager(/*FileSystemOpts=*/{}, std::move(fs)));
+  clang::tooling::ToolInvocation tool(
+      argv, std::make_unique<IncludeScanningAction>(abs_paths), files.get());
+  if (!tool.run()) {
+    return llvm::createStringError(
+        llvm::inconvertibleErrorCode(),
+        "Failed to scan includes for: " + cmd.Filename);
+  }
+
+  std::vector<std::pair<std::string, std::string>> result;
+  result.reserve(abs_paths.size());
+  for (auto &entry : abs_paths) {
+    result.emplace_back(entry.first, std::move(entry.second));
+  }
+  return result;
+}
+}  // namespace tools::ide_query::cc_analyzer
diff --git a/tools/ide_query/cc_analyzer/include_scanner.h b/tools/ide_query/cc_analyzer/include_scanner.h
new file mode 100644
index 0000000000..e814e72cb1
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/include_scanner.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef _TOOLS_IDE_QUERY_CC_ANALYZER_INCLUDE_SCANNER_H_
+#define _TOOLS_IDE_QUERY_CC_ANALYZER_INCLUDE_SCANNER_H_
+
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "clang/Tooling/CompilationDatabase.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/VirtualFileSystem.h"
+
+namespace tools::ide_query::cc_analyzer {
+
+// Returns absolute paths and contents for all the includes necessary for
+// compiling source file in command.
+llvm::Expected<std::vector<std::pair<std::string, std::string>>> ScanIncludes(
+    const clang::tooling::CompileCommand &cmd,
+    llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> fs);
+
+}  // namespace tools::ide_query::cc_analyzer
+
+#endif
diff --git a/tools/ide_query/cc_analyzer/main.cc b/tools/ide_query/cc_analyzer/main.cc
new file mode 100644
index 0000000000..8e00c6396a
--- /dev/null
+++ b/tools/ide_query/cc_analyzer/main.cc
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Driver for c++ extractor. Operates in two modes:
+// - DEPS, scans build graph for active files and reports targets that need to
+// be build for analyzing that file.
+// - INPUTS, scans the source code for active files and returns all the sources
+// required for analyzing that file.
+//
+// Uses stdin/stdout to take in requests and provide responses.
+#include <unistd.h>
+
+#include <memory>
+#include <utility>
+
+#include "analyzer.h"
+#include "google/protobuf/message.h"
+#include "ide_query.pb.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace {
+enum class OpMode {
+  DEPS = 0,
+  INPUTS = 1,
+};
+llvm::cl::opt<OpMode> mode{
+    "mode",
+    llvm::cl::values(clEnumValN(OpMode::DEPS, "deps",
+                                "Figure out targets that need to be build"),
+                     clEnumValN(OpMode::INPUTS, "inputs",
+                                "Figure out generated files used")),
+    llvm::cl::desc("Print the list of headers to insert and remove"),
+};
+
+ide_query::IdeAnalysis ReturnError(llvm::StringRef message) {
+  ide_query::IdeAnalysis result;
+  result.mutable_status()->set_code(ide_query::Status::FAILURE);
+  result.mutable_status()->set_message(message.str());
+  return result;
+}
+
+}  // namespace
+
+int main(int argc, char* argv[]) {
+  llvm::InitializeAllTargetInfos();
+  llvm::cl::ParseCommandLineOptions(argc, argv);
+
+  ide_query::RepoState state;
+  if (!state.ParseFromFileDescriptor(STDIN_FILENO)) {
+    llvm::errs() << "Failed to parse input!\n";
+    return 1;
+  }
+
+  std::unique_ptr<google::protobuf::Message> result;
+  switch (mode) {
+    case OpMode::DEPS: {
+      result = std::make_unique<ide_query::DepsResponse>(
+          tools::ide_query::cc_analyzer::GetDeps(std::move(state)));
+      break;
+    }
+    case OpMode::INPUTS: {
+      result = std::make_unique<ide_query::IdeAnalysis>(
+          tools::ide_query::cc_analyzer::GetBuildInputs(std::move(state)));
+      break;
+    }
+    default:
+      llvm::errs() << "Unknown operation mode!\n";
+      return 1;
+  }
+  if (!result->SerializeToFileDescriptor(STDOUT_FILENO)) {
+    llvm::errs() << "Failed to serialize result!\n";
+    return 1;
+  }
+
+  return 0;
+}
diff --git a/tools/ide_query/ide_query.go b/tools/ide_query/ide_query.go
index c1c4da0ed5..9645a027d4 100644
--- a/tools/ide_query/ide_query.go
+++ b/tools/ide_query/ide_query.go
@@ -1,8 +1,25 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 // Binary ide_query generates and analyzes build artifacts.
 // The produced result can be consumed by IDEs to provide language features.
 package main
 
 import (
+	"bytes"
 	"container/list"
 	"context"
 	"encoding/json"
@@ -21,9 +38,13 @@ import (
 
 // Env contains information about the current environment.
 type Env struct {
-	LunchTarget LunchTarget
-	RepoDir     string
-	OutDir      string
+	LunchTarget    LunchTarget
+	RepoDir        string
+	OutDir         string
+	ClangToolsRoot string
+
+	CcFiles   []string
+	JavaFiles []string
 }
 
 // LunchTarget is a parsed Android lunch target.
@@ -64,6 +85,7 @@ func main() {
 	var env Env
 	env.OutDir = os.Getenv("OUT_DIR")
 	env.RepoDir = os.Getenv("ANDROID_BUILD_TOP")
+	env.ClangToolsRoot = os.Getenv("PREBUILTS_CLANG_TOOLS_ROOT")
 	flag.Var(&env.LunchTarget, "lunch_target", "The lunch target to query")
 	flag.Parse()
 	files := flag.Args()
@@ -73,64 +95,169 @@ func main() {
 		return
 	}
 
-	var javaFiles []string
 	for _, f := range files {
 		switch {
 		case strings.HasSuffix(f, ".java") || strings.HasSuffix(f, ".kt"):
-			javaFiles = append(javaFiles, f)
+			env.JavaFiles = append(env.JavaFiles, f)
+		case strings.HasSuffix(f, ".cc") || strings.HasSuffix(f, ".cpp") || strings.HasSuffix(f, ".h"):
+			env.CcFiles = append(env.CcFiles, f)
 		default:
 			log.Printf("File %q is supported - will be skipped.", f)
 		}
 	}
 
 	ctx := context.Background()
-	javaDepsPath := path.Join(env.RepoDir, env.OutDir, "soong/module_bp_java_deps.json")
-	// TODO(michaelmerg): Figure out if module_bp_java_deps.json is outdated.
+	// TODO(michaelmerg): Figure out if module_bp_java_deps.json and compile_commands.json is outdated.
 	runMake(ctx, env, "nothing")
 
-	javaModules, err := loadJavaModules(javaDepsPath)
+	javaModules, javaFileToModuleMap, err := loadJavaModules(&env)
 	if err != nil {
-		log.Fatalf("Failed to load java modules: %v", err)
+		log.Printf("Failed to load java modules: %v", err)
 	}
+	toMake := getJavaTargets(javaFileToModuleMap)
 
-	fileToModule := make(map[string]*javaModule) // file path -> module
-	for _, f := range javaFiles {
-		for _, m := range javaModules {
-			if !slices.Contains(m.Srcs, f) {
-				continue
-			}
-			if fileToModule[f] != nil {
-				// TODO(michaelmerg): Handle the case where a file is covered by multiple modules.
-				log.Printf("File %q found in module %q but is already covered by module %q", f, m.Name, fileToModule[f].Name)
-				continue
-			}
-			fileToModule[f] = m
+	ccTargets, status := getCCTargets(ctx, &env)
+	if status != nil && status.Code != pb.Status_OK {
+		log.Fatalf("Failed to query cc targets: %v", *status.Message)
+	}
+	toMake = append(toMake, ccTargets...)
+	fmt.Printf("Running make for modules: %v\n", strings.Join(toMake, ", "))
+	if err := runMake(ctx, env, toMake...); err != nil {
+		log.Printf("Building deps failed: %v", err)
+	}
+
+	res := getJavaInputs(&env, javaModules, javaFileToModuleMap)
+	ccAnalysis := getCCInputs(ctx, &env)
+	proto.Merge(res, ccAnalysis)
+
+	res.BuildArtifactRoot = env.OutDir
+	data, err := proto.Marshal(res)
+	if err != nil {
+		log.Fatalf("Failed to marshal result proto: %v", err)
+	}
+
+	err = os.WriteFile(path.Join(env.RepoDir, env.OutDir, "ide_query.pb"), data, 0644)
+	if err != nil {
+		log.Fatalf("Failed to write result proto: %v", err)
+	}
+
+	for _, s := range res.Sources {
+		fmt.Printf("%s: %v (Deps: %d, Generated: %d)\n", s.GetPath(), s.GetStatus(), len(s.GetDeps()), len(s.GetGenerated()))
+	}
+}
+
+func repoState(env *Env) *pb.RepoState {
+	const compDbPath = "soong/development/ide/compdb/compile_commands.json"
+	return &pb.RepoState{
+		RepoDir:        env.RepoDir,
+		ActiveFilePath: env.CcFiles,
+		OutDir:         env.OutDir,
+		CompDbPath:     path.Join(env.OutDir, compDbPath),
+	}
+}
+
+func runCCanalyzer(ctx context.Context, env *Env, mode string, in []byte) ([]byte, error) {
+	ccAnalyzerPath := path.Join(env.ClangToolsRoot, "bin/ide_query_cc_analyzer")
+	outBuffer := new(bytes.Buffer)
+
+	inBuffer := new(bytes.Buffer)
+	inBuffer.Write(in)
+
+	cmd := exec.CommandContext(ctx, ccAnalyzerPath, "--mode="+mode)
+	cmd.Dir = env.RepoDir
+
+	cmd.Stdin = inBuffer
+	cmd.Stdout = outBuffer
+	cmd.Stderr = os.Stderr
+
+	err := cmd.Run()
+
+	return outBuffer.Bytes(), err
+}
+
+// Execute cc_analyzer and get all the targets that needs to be build for analyzing files.
+func getCCTargets(ctx context.Context, env *Env) ([]string, *pb.Status) {
+	state := repoState(env)
+	bytes, err := proto.Marshal(state)
+	if err != nil {
+		log.Fatalln("Failed to serialize state:", err)
+	}
+
+	resp := new(pb.DepsResponse)
+	result, err := runCCanalyzer(ctx, env, "deps", bytes)
+	if marshal_err := proto.Unmarshal(result, resp); marshal_err != nil {
+		return nil, &pb.Status{
+			Code:    pb.Status_FAILURE,
+			Message: proto.String("Malformed response from cc_analyzer: " + marshal_err.Error()),
 		}
 	}
 
-	var toMake []string
-	for _, m := range fileToModule {
-		toMake = append(toMake, m.Name)
+	var targets []string
+	if resp.Status != nil && resp.Status.Code != pb.Status_OK {
+		return targets, resp.Status
 	}
-	fmt.Printf("Running make for modules: %v\n", strings.Join(toMake, ", "))
-	if err := runMake(ctx, env, toMake...); err != nil {
-		log.Fatalf("Failed to run make: %v", err)
+	for _, deps := range resp.Deps {
+		targets = append(targets, deps.BuildTarget...)
 	}
 
+	status := &pb.Status{Code: pb.Status_OK}
+	if err != nil {
+		status = &pb.Status{
+			Code:    pb.Status_FAILURE,
+			Message: proto.String(err.Error()),
+		}
+	}
+	return targets, status
+}
+
+func getCCInputs(ctx context.Context, env *Env) *pb.IdeAnalysis {
+	state := repoState(env)
+	bytes, err := proto.Marshal(state)
+	if err != nil {
+		log.Fatalln("Failed to serialize state:", err)
+	}
+
+	resp := new(pb.IdeAnalysis)
+	result, err := runCCanalyzer(ctx, env, "inputs", bytes)
+	if marshal_err := proto.Unmarshal(result, resp); marshal_err != nil {
+		resp.Status = &pb.Status{
+			Code:    pb.Status_FAILURE,
+			Message: proto.String("Malformed response from cc_analyzer: " + marshal_err.Error()),
+		}
+		return resp
+	}
+
+	if err != nil && (resp.Status == nil || resp.Status.Code == pb.Status_OK) {
+		resp.Status = &pb.Status{
+			Code:    pb.Status_FAILURE,
+			Message: proto.String(err.Error()),
+		}
+	}
+	return resp
+}
+
+func getJavaTargets(javaFileToModuleMap map[string]*javaModule) []string {
+	var targets []string
+	for _, m := range javaFileToModuleMap {
+		targets = append(targets, m.Name)
+	}
+	return targets
+}
+
+func getJavaInputs(env *Env, javaModules map[string]*javaModule, javaFileToModuleMap map[string]*javaModule) *pb.IdeAnalysis {
 	var sources []*pb.SourceFile
 	type depsAndGenerated struct {
 		Deps      []string
 		Generated []*pb.GeneratedFile
 	}
 	moduleToDeps := make(map[string]*depsAndGenerated)
-	for _, f := range files {
+	for _, f := range env.JavaFiles {
 		file := &pb.SourceFile{
-			Path:       f,
-			WorkingDir: env.RepoDir,
+			Path: f,
 		}
 		sources = append(sources, file)
 
-		m := fileToModule[f]
+		m := javaFileToModuleMap[f]
 		if m == nil {
 			file.Status = &pb.Status{
 				Code:    pb.Status_FAILURE,
@@ -167,24 +294,8 @@ func main() {
 		file.Generated = generated
 		file.Deps = deps
 	}
-
-	res := &pb.IdeAnalysis{
-		BuildArtifactRoot: env.OutDir,
-		Sources:           sources,
-		Status:            &pb.Status{Code: pb.Status_OK},
-	}
-	data, err := proto.Marshal(res)
-	if err != nil {
-		log.Fatalf("Failed to marshal result proto: %v", err)
-	}
-
-	err = os.WriteFile(path.Join(env.OutDir, "ide_query.pb"), data, 0644)
-	if err != nil {
-		log.Fatalf("Failed to write result proto: %v", err)
-	}
-
-	for _, s := range sources {
-		fmt.Printf("%s: %v (Deps: %d, Generated: %d)\n", s.GetPath(), s.GetStatus(), len(s.GetDeps()), len(s.GetGenerated()))
+	return &pb.IdeAnalysis{
+		Sources: sources,
 	}
 }
 
@@ -214,26 +325,40 @@ type javaModule struct {
 	SrcJars []string `json:"srcjars,omitempty"`
 }
 
-func loadJavaModules(path string) (map[string]*javaModule, error) {
-	data, err := os.ReadFile(path)
+func loadJavaModules(env *Env) (map[string]*javaModule, map[string]*javaModule, error) {
+	javaDepsPath := path.Join(env.RepoDir, env.OutDir, "soong/module_bp_java_deps.json")
+	data, err := os.ReadFile(javaDepsPath)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
-	var ret map[string]*javaModule // module name -> module
-	if err = json.Unmarshal(data, &ret); err != nil {
-		return nil, err
+	var moduleMapping map[string]*javaModule // module name -> module
+	if err = json.Unmarshal(data, &moduleMapping); err != nil {
+		return nil, nil, err
 	}
 
-	for name, module := range ret {
+	javaModules := make(map[string]*javaModule)
+	javaFileToModuleMap := make(map[string]*javaModule)
+	for name, module := range moduleMapping {
 		if strings.HasSuffix(name, "-jarjar") || strings.HasSuffix(name, ".impl") {
-			delete(ret, name)
 			continue
 		}
-
 		module.Name = name
+		javaModules[name] = module
+		for _, src := range module.Srcs {
+			if !slices.Contains(env.JavaFiles, src) {
+				// We are only interested in active files.
+				continue
+			}
+			if javaFileToModuleMap[src] != nil {
+				// TODO(michaelmerg): Handle the case where a file is covered by multiple modules.
+				log.Printf("File %q found in module %q but is already covered by module %q", src, module.Name, javaFileToModuleMap[src].Name)
+				continue
+			}
+			javaFileToModuleMap[src] = module
+		}
 	}
-	return ret, nil
+	return javaModules, javaFileToModuleMap, nil
 }
 
 func transitiveDeps(m *javaModule, modules map[string]*javaModule) []string {
diff --git a/tools/ide_query/ide_query.sh b/tools/ide_query/ide_query.sh
index 663c4dc14a..2df48d0129 100755
--- a/tools/ide_query/ide_query.sh
+++ b/tools/ide_query/ide_query.sh
@@ -1,5 +1,19 @@
 #!/bin/bash -e
 
+# Copyright (C) 2024 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 cd $(dirname $BASH_SOURCE)
 source $(pwd)/../../shell_utils.sh
 require_top
@@ -7,6 +21,17 @@ require_top
 # Ensure cogsetup (out/ will be symlink outside the repo)
 . ${TOP}/build/make/cogsetup.sh
 
+case $(uname -s) in
+    Linux)
+      export PREBUILTS_CLANG_TOOLS_ROOT="${TOP}/prebuilts/clang-tools/linux-x86/"
+      PREBUILTS_GO_ROOT="${TOP}/prebuilts/go/linux-x86/"
+      ;;
+    *)
+      echo "Only supported for linux hosts" >&2
+      exit 1
+      ;;
+esac
+
 export ANDROID_BUILD_TOP=$TOP
 export OUT_DIR=${OUT_DIR}
-exec "${TOP}/prebuilts/go/linux-x86/bin/go" "run" "ide_query" "$@"
+exec "${PREBUILTS_GO_ROOT}/bin/go" "run" "ide_query" "$@"
diff --git a/tools/ide_query/ide_query_proto/Android.bp b/tools/ide_query/ide_query_proto/Android.bp
new file mode 100644
index 0000000000..70f15cd4a0
--- /dev/null
+++ b/tools/ide_query/ide_query_proto/Android.bp
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library_host_static {
+    name: "ide_query_proto",
+    srcs: [
+        "ide_query.proto",
+    ],
+    proto: {
+        export_proto_headers: true,
+        type: "full",
+        canonical_path_from_root: false,
+    },
+    compile_multilib: "64",
+    shared_libs: ["libprotobuf-cpp-full"],
+}
diff --git a/tools/ide_query/ide_query_proto/ide_query.pb.go b/tools/ide_query/ide_query_proto/ide_query.pb.go
index 30571ccd14..f3a016d36b 100644
--- a/tools/ide_query/ide_query_proto/ide_query.pb.go
+++ b/tools/ide_query/ide_query_proto/ide_query.pb.go
@@ -1,6 +1,6 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.30.0
+// 	protoc-gen-go v1.25.0-devel
 // 	protoc        v3.21.12
 // source: ide_query.proto
 
@@ -72,7 +72,7 @@ type Status struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Code Status_Code `protobuf:"varint,1,opt,name=code,proto3,enum=cider.build.companion.Status_Code" json:"code,omitempty"`
+	Code Status_Code `protobuf:"varint,1,opt,name=code,proto3,enum=ide_query.Status_Code" json:"code,omitempty"`
 	// Details about the status, might be displayed to user.
 	Message *string `protobuf:"bytes,2,opt,name=message,proto3,oneof" json:"message,omitempty"`
 }
@@ -123,6 +123,142 @@ func (x *Status) GetMessage() string {
 	return ""
 }
 
+// Represents an Android checkout on user's workstation.
+type RepoState struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Absolute path for the checkout in the workstation.
+	// e.g. /home/user/work/android/
+	RepoDir string `protobuf:"bytes,1,opt,name=repo_dir,json=repoDir,proto3" json:"repo_dir,omitempty"`
+	// Relative to repo_dir.
+	ActiveFilePath []string `protobuf:"bytes,2,rep,name=active_file_path,json=activeFilePath,proto3" json:"active_file_path,omitempty"`
+	// Repository relative path to output directory in workstation.
+	OutDir string `protobuf:"bytes,3,opt,name=out_dir,json=outDir,proto3" json:"out_dir,omitempty"`
+	// Repository relative path to compile_commands.json in workstation.
+	CompDbPath string `protobuf:"bytes,4,opt,name=comp_db_path,json=compDbPath,proto3" json:"comp_db_path,omitempty"`
+}
+
+func (x *RepoState) Reset() {
+	*x = RepoState{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_ide_query_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *RepoState) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*RepoState) ProtoMessage() {}
+
+func (x *RepoState) ProtoReflect() protoreflect.Message {
+	mi := &file_ide_query_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use RepoState.ProtoReflect.Descriptor instead.
+func (*RepoState) Descriptor() ([]byte, []int) {
+	return file_ide_query_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *RepoState) GetRepoDir() string {
+	if x != nil {
+		return x.RepoDir
+	}
+	return ""
+}
+
+func (x *RepoState) GetActiveFilePath() []string {
+	if x != nil {
+		return x.ActiveFilePath
+	}
+	return nil
+}
+
+func (x *RepoState) GetOutDir() string {
+	if x != nil {
+		return x.OutDir
+	}
+	return ""
+}
+
+func (x *RepoState) GetCompDbPath() string {
+	if x != nil {
+		return x.CompDbPath
+	}
+	return ""
+}
+
+// Provides all the targets that are pre-requisities for running language
+// services on active_file_paths.
+type DepsResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Deps   []*DepsResponse_Deps `protobuf:"bytes,1,rep,name=deps,proto3" json:"deps,omitempty"`
+	Status *Status              `protobuf:"bytes,2,opt,name=status,proto3,oneof" json:"status,omitempty"`
+}
+
+func (x *DepsResponse) Reset() {
+	*x = DepsResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_ide_query_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DepsResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DepsResponse) ProtoMessage() {}
+
+func (x *DepsResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_ide_query_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DepsResponse.ProtoReflect.Descriptor instead.
+func (*DepsResponse) Descriptor() ([]byte, []int) {
+	return file_ide_query_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *DepsResponse) GetDeps() []*DepsResponse_Deps {
+	if x != nil {
+		return x.Deps
+	}
+	return nil
+}
+
+func (x *DepsResponse) GetStatus() *Status {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
+// Returns all the information necessary for providing language services for the
+// active files.
 type GeneratedFile struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -130,8 +266,7 @@ type GeneratedFile struct {
 
 	// Path to the file relative to IdeAnalysis.build_artifact_root.
 	Path string `protobuf:"bytes,1,opt,name=path,proto3" json:"path,omitempty"`
-	//	The text of the generated file, if not provided contents will be read
-	//
+	// The text of the generated file, if not provided contents will be read
 	// from the path above in user's workstation.
 	Contents []byte `protobuf:"bytes,2,opt,name=contents,proto3,oneof" json:"contents,omitempty"`
 }
@@ -139,7 +274,7 @@ type GeneratedFile struct {
 func (x *GeneratedFile) Reset() {
 	*x = GeneratedFile{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ide_query_proto_msgTypes[1]
+		mi := &file_ide_query_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -152,7 +287,7 @@ func (x *GeneratedFile) String() string {
 func (*GeneratedFile) ProtoMessage() {}
 
 func (x *GeneratedFile) ProtoReflect() protoreflect.Message {
-	mi := &file_ide_query_proto_msgTypes[1]
+	mi := &file_ide_query_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -165,7 +300,7 @@ func (x *GeneratedFile) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use GeneratedFile.ProtoReflect.Descriptor instead.
 func (*GeneratedFile) Descriptor() ([]byte, []int) {
-	return file_ide_query_proto_rawDescGZIP(), []int{1}
+	return file_ide_query_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *GeneratedFile) GetPath() string {
@@ -187,11 +322,11 @@ type SourceFile struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Repo root relative path to the source file in the tree.
+	// Path to the source file relative to repository root.
 	Path string `protobuf:"bytes,1,opt,name=path,proto3" json:"path,omitempty"`
 	// Working directory used by the build system. All the relative
 	// paths in compiler_arguments should be relative to this path.
-	// Relative to workspace root.
+	// Relative to repository root.
 	WorkingDir string `protobuf:"bytes,2,opt,name=working_dir,json=workingDir,proto3" json:"working_dir,omitempty"`
 	// Compiler arguments to compile the source file. If multiple variants
 	// of the module being compiled are possible, the query script will choose
@@ -200,12 +335,12 @@ type SourceFile struct {
 	// Any generated files that are used in compiling the file.
 	Generated []*GeneratedFile `protobuf:"bytes,4,rep,name=generated,proto3" json:"generated,omitempty"`
 	// Paths to all of the sources, like build files, code generators,
-	// proto files etc. that were used  during analysis. Used to figure
+	// proto files etc. that were used during analysis. Used to figure
 	// out when a set of build artifacts are stale and the query tool
 	// must be re-run.
-	// Relative to workspace root.
+	// Relative to repository root.
 	Deps []string `protobuf:"bytes,5,rep,name=deps,proto3" json:"deps,omitempty"`
-	// Represensts analysis status for this particular file. e.g. not part
+	// Represents analysis status for this particular file. e.g. not part
 	// of the build graph.
 	Status *Status `protobuf:"bytes,6,opt,name=status,proto3,oneof" json:"status,omitempty"`
 }
@@ -213,7 +348,7 @@ type SourceFile struct {
 func (x *SourceFile) Reset() {
 	*x = SourceFile{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ide_query_proto_msgTypes[2]
+		mi := &file_ide_query_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -226,7 +361,7 @@ func (x *SourceFile) String() string {
 func (*SourceFile) ProtoMessage() {}
 
 func (x *SourceFile) ProtoReflect() protoreflect.Message {
-	mi := &file_ide_query_proto_msgTypes[2]
+	mi := &file_ide_query_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -239,7 +374,7 @@ func (x *SourceFile) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SourceFile.ProtoReflect.Descriptor instead.
 func (*SourceFile) Descriptor() ([]byte, []int) {
-	return file_ide_query_proto_rawDescGZIP(), []int{2}
+	return file_ide_query_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *SourceFile) GetPath() string {
@@ -289,21 +424,20 @@ type IdeAnalysis struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Path relative to workspace root, containing all the artifacts
+	// Path relative to repository root, containing all the artifacts
 	// generated by the build system. GeneratedFile.path are always
 	// relative to this directory.
 	BuildArtifactRoot string        `protobuf:"bytes,1,opt,name=build_artifact_root,json=buildArtifactRoot,proto3" json:"build_artifact_root,omitempty"`
 	Sources           []*SourceFile `protobuf:"bytes,2,rep,name=sources,proto3" json:"sources,omitempty"`
 	// Status representing overall analysis.
-	// Should fail only when no analysis can be performed, e.g. workspace
-	// isn't setup.
+	// Should fail only when no analysis can be performed.
 	Status *Status `protobuf:"bytes,3,opt,name=status,proto3,oneof" json:"status,omitempty"`
 }
 
 func (x *IdeAnalysis) Reset() {
 	*x = IdeAnalysis{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_ide_query_proto_msgTypes[3]
+		mi := &file_ide_query_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -316,7 +450,7 @@ func (x *IdeAnalysis) String() string {
 func (*IdeAnalysis) ProtoMessage() {}
 
 func (x *IdeAnalysis) ProtoReflect() protoreflect.Message {
-	mi := &file_ide_query_proto_msgTypes[3]
+	mi := &file_ide_query_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -329,7 +463,7 @@ func (x *IdeAnalysis) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use IdeAnalysis.ProtoReflect.Descriptor instead.
 func (*IdeAnalysis) Descriptor() ([]byte, []int) {
-	return file_ide_query_proto_rawDescGZIP(), []int{3}
+	return file_ide_query_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *IdeAnalysis) GetBuildArtifactRoot() string {
@@ -353,58 +487,144 @@ func (x *IdeAnalysis) GetStatus() *Status {
 	return nil
 }
 
+// Build dependencies of a source file for providing language services.
+type DepsResponse_Deps struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Relative to repo_dir.
+	SourceFile string `protobuf:"bytes,1,opt,name=source_file,json=sourceFile,proto3" json:"source_file,omitempty"`
+	// Build target to execute for generating dep.
+	BuildTarget []string `protobuf:"bytes,2,rep,name=build_target,json=buildTarget,proto3" json:"build_target,omitempty"`
+	Status      *Status  `protobuf:"bytes,3,opt,name=status,proto3,oneof" json:"status,omitempty"`
+}
+
+func (x *DepsResponse_Deps) Reset() {
+	*x = DepsResponse_Deps{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_ide_query_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DepsResponse_Deps) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DepsResponse_Deps) ProtoMessage() {}
+
+func (x *DepsResponse_Deps) ProtoReflect() protoreflect.Message {
+	mi := &file_ide_query_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DepsResponse_Deps.ProtoReflect.Descriptor instead.
+func (*DepsResponse_Deps) Descriptor() ([]byte, []int) {
+	return file_ide_query_proto_rawDescGZIP(), []int{2, 0}
+}
+
+func (x *DepsResponse_Deps) GetSourceFile() string {
+	if x != nil {
+		return x.SourceFile
+	}
+	return ""
+}
+
+func (x *DepsResponse_Deps) GetBuildTarget() []string {
+	if x != nil {
+		return x.BuildTarget
+	}
+	return nil
+}
+
+func (x *DepsResponse_Deps) GetStatus() *Status {
+	if x != nil {
+		return x.Status
+	}
+	return nil
+}
+
 var File_ide_query_proto protoreflect.FileDescriptor
 
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+	0x5f, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x42, 0x1b, 0x5a, 0x19, 0x69, 0x64, 0x65, 0x5f, 0x71,
+	0x75, 0x65, 0x72, 0x79, 0x2f, 0x69, 0x64, 0x65, 0x5f, 0x71, 0x75, 0x65, 0x72, 0x79, 0x5f, 0x70,
+	0x72, 0x6f, 0x74, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -420,25 +640,31 @@ func file_ide_query_proto_rawDescGZIP() []byte {
 }
 
 var file_ide_query_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_ide_query_proto_msgTypes = make([]protoimpl.MessageInfo, 4)
+var file_ide_query_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
 var file_ide_query_proto_goTypes = []interface{}{
-	(Status_Code)(0),      // 0: cider.build.companion.Status.Code
-	(*Status)(nil),        // 1: cider.build.companion.Status
-	(*GeneratedFile)(nil), // 2: cider.build.companion.GeneratedFile
-	(*SourceFile)(nil),    // 3: cider.build.companion.SourceFile
-	(*IdeAnalysis)(nil),   // 4: cider.build.companion.IdeAnalysis
+	(Status_Code)(0),          // 0: ide_query.Status.Code
+	(*Status)(nil),            // 1: ide_query.Status
+	(*RepoState)(nil),         // 2: ide_query.RepoState
+	(*DepsResponse)(nil),      // 3: ide_query.DepsResponse
+	(*GeneratedFile)(nil),     // 4: ide_query.GeneratedFile
+	(*SourceFile)(nil),        // 5: ide_query.SourceFile
+	(*IdeAnalysis)(nil),       // 6: ide_query.IdeAnalysis
+	(*DepsResponse_Deps)(nil), // 7: ide_query.DepsResponse.Deps
 }
 var file_ide_query_proto_depIdxs = []int32{
-	0, // 0: cider.build.companion.Status.code:type_name -> cider.build.companion.Status.Code
-	2, // 1: cider.build.companion.SourceFile.generated:type_name -> cider.build.companion.GeneratedFile
-	1, // 2: cider.build.companion.SourceFile.status:type_name -> cider.build.companion.Status
-	3, // 3: cider.build.companion.IdeAnalysis.sources:type_name -> cider.build.companion.SourceFile
-	1, // 4: cider.build.companion.IdeAnalysis.status:type_name -> cider.build.companion.Status
-	5, // [5:5] is the sub-list for method output_type
-	5, // [5:5] is the sub-list for method input_type
-	5, // [5:5] is the sub-list for extension type_name
-	5, // [5:5] is the sub-list for extension extendee
-	0, // [0:5] is the sub-list for field type_name
+	0, // 0: ide_query.Status.code:type_name -> ide_query.Status.Code
+	7, // 1: ide_query.DepsResponse.deps:type_name -> ide_query.DepsResponse.Deps
+	1, // 2: ide_query.DepsResponse.status:type_name -> ide_query.Status
+	4, // 3: ide_query.SourceFile.generated:type_name -> ide_query.GeneratedFile
+	1, // 4: ide_query.SourceFile.status:type_name -> ide_query.Status
+	5, // 5: ide_query.IdeAnalysis.sources:type_name -> ide_query.SourceFile
+	1, // 6: ide_query.IdeAnalysis.status:type_name -> ide_query.Status
+	1, // 7: ide_query.DepsResponse.Deps.status:type_name -> ide_query.Status
+	8, // [8:8] is the sub-list for method output_type
+	8, // [8:8] is the sub-list for method input_type
+	8, // [8:8] is the sub-list for extension type_name
+	8, // [8:8] is the sub-list for extension extendee
+	0, // [0:8] is the sub-list for field type_name
 }
 
 func init() { file_ide_query_proto_init() }
@@ -460,7 +686,7 @@ func file_ide_query_proto_init() {
 			}
 		}
 		file_ide_query_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*GeneratedFile); i {
+			switch v := v.(*RepoState); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -472,7 +698,7 @@ func file_ide_query_proto_init() {
 			}
 		}
 		file_ide_query_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SourceFile); i {
+			switch v := v.(*DepsResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -484,6 +710,30 @@ func file_ide_query_proto_init() {
 			}
 		}
 		file_ide_query_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*GeneratedFile); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_ide_query_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SourceFile); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_ide_query_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*IdeAnalysis); i {
 			case 0:
 				return &v.state
@@ -495,18 +745,32 @@ func file_ide_query_proto_init() {
 				return nil
 			}
 		}
+		file_ide_query_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DepsResponse_Deps); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_ide_query_proto_msgTypes[0].OneofWrappers = []interface{}{}
-	file_ide_query_proto_msgTypes[1].OneofWrappers = []interface{}{}
 	file_ide_query_proto_msgTypes[2].OneofWrappers = []interface{}{}
 	file_ide_query_proto_msgTypes[3].OneofWrappers = []interface{}{}
+	file_ide_query_proto_msgTypes[4].OneofWrappers = []interface{}{}
+	file_ide_query_proto_msgTypes[5].OneofWrappers = []interface{}{}
+	file_ide_query_proto_msgTypes[6].OneofWrappers = []interface{}{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_ide_query_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   4,
+			NumMessages:   7,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/tools/ide_query/ide_query_proto/ide_query.proto b/tools/ide_query/ide_query_proto/ide_query.proto
index 63eea39f4d..3d7a8e760a 100644
--- a/tools/ide_query/ide_query_proto/ide_query.proto
+++ b/tools/ide_query/ide_query_proto/ide_query.proto
@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 syntax = "proto3";
 
 package ide_query;
@@ -14,6 +29,36 @@ message Status {
   optional string message = 2;
 }
 
+// Represents an Android checkout on user's workstation.
+message RepoState {
+  // Absolute path for the checkout in the workstation.
+  // e.g. /home/user/work/android/
+  string repo_dir = 1;
+  // Relative to repo_dir.
+  repeated string active_file_path = 2;
+  // Repository relative path to output directory in workstation.
+  string out_dir = 3;
+  // Repository relative path to compile_commands.json in workstation.
+  string comp_db_path = 4;
+}
+
+// Provides all the targets that are pre-requisities for running language
+// services on active_file_paths.
+message DepsResponse {
+  // Build dependencies of a source file for providing language services.
+  message Deps {
+    // Relative to repo_dir.
+    string source_file = 1;
+    // Build target to execute for generating dep.
+    repeated string build_target = 2;
+    optional Status status = 3;
+  }
+  repeated Deps deps = 1;
+  optional Status status = 2;
+}
+
+// Returns all the information necessary for providing language services for the
+// active files.
 message GeneratedFile {
   // Path to the file relative to IdeAnalysis.build_artifact_root.
   string path = 1;