[Lldb-commits] [lldb] [lldb-dap] Setup DAP for unit testing. (PR #139937)
John Harrison via lldb-commits
lldb-commits at lists.llvm.org
Wed May 14 13:11:50 PDT 2025
https://github.com/ashgti updated https://github.com/llvm/llvm-project/pull/139937
>From 6f947e38ad4f744754cf13c1094c4e5e3fd249b6 Mon Sep 17 00:00:00 2001
From: John Harrison <harjohn at google.com>
Date: Wed, 14 May 2025 10:31:40 -0700
Subject: [PATCH 1/5] [lldb-dap] Setup DAP for unit testing.
This is a very simple case that currently only validates we can create a DAP instance and send a message over the transport layer. More in-depth tests will require additional helpers and possibly refactors of DAP to make it more testable, however this is some ground work to have basic support for unit tests.
---
lldb/tools/lldb-dap/DAP.h | 3 +-
lldb/unittests/DAP/CMakeLists.txt | 1 +
lldb/unittests/DAP/DAPTest.cpp | 63 +++++++++++++++++++++++++++++++
3 files changed, 66 insertions(+), 1 deletion(-)
create mode 100644 lldb/unittests/DAP/DAPTest.cpp
diff --git a/lldb/tools/lldb-dap/DAP.h b/lldb/tools/lldb-dap/DAP.h
index c2e4c2dea582e..2ff66d1cd0182 100644
--- a/lldb/tools/lldb-dap/DAP.h
+++ b/lldb/tools/lldb-dap/DAP.h
@@ -226,7 +226,8 @@ struct DAP {
/// \param[in] default_repl_mode
/// Default repl mode behavior, as configured by the binary.
/// \param[in] pre_init_commands
- /// LLDB commands to execute as soon as the debugger instance is allocaed.
+ /// LLDB commands to execute as soon as the debugger instance is
+ /// allocated.
/// \param[in] transport
/// Transport for this debug session.
DAP(Log *log, const ReplMode default_repl_mode,
diff --git a/lldb/unittests/DAP/CMakeLists.txt b/lldb/unittests/DAP/CMakeLists.txt
index 110733e93b192..6074e9b872c49 100644
--- a/lldb/unittests/DAP/CMakeLists.txt
+++ b/lldb/unittests/DAP/CMakeLists.txt
@@ -3,6 +3,7 @@ add_lldb_unittest(DAPTests
LLDBUtilsTest.cpp
TransportTest.cpp
ProtocolTypesTest.cpp
+ DAPTest.cpp
LINK_LIBS
lldbDAP
diff --git a/lldb/unittests/DAP/DAPTest.cpp b/lldb/unittests/DAP/DAPTest.cpp
new file mode 100644
index 0000000000000..9d2a9b944678e
--- /dev/null
+++ b/lldb/unittests/DAP/DAPTest.cpp
@@ -0,0 +1,63 @@
+//===-- DAPTest.cpp -------------------------------------------------===//
+//
+// 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 "DAP.h"
+#include "Protocol/ProtocolBase.h"
+#include "Transport.h"
+#include "lldb/Host/File.h"
+#include "lldb/Host/Pipe.h"
+#include "llvm/Testing/Support/Error.h"
+#include "gtest/gtest.h"
+#include <chrono>
+#include <memory>
+#include <optional>
+
+using namespace llvm;
+using namespace lldb;
+using namespace lldb_dap;
+using namespace lldb_dap::protocol;
+using lldb_private::File;
+using lldb_private::NativeFile;
+using lldb_private::Pipe;
+
+class DAPTest : public testing::Test {
+protected:
+ Pipe input;
+ Pipe output;
+ std::unique_ptr<Transport> toDAP;
+ std::unique_ptr<Transport> fromDAP;
+
+ void SetUp() override {
+ ASSERT_THAT_ERROR(input.CreateNew(false).ToError(), Succeeded());
+ ASSERT_THAT_ERROR(output.CreateNew(false).ToError(), Succeeded());
+ toDAP = std::make_unique<Transport>(
+ "toDAP", nullptr,
+ std::make_shared<NativeFile>(input.GetReadFileDescriptor(),
+ File::eOpenOptionReadOnly,
+ NativeFile::Unowned),
+ std::make_shared<NativeFile>(output.GetWriteFileDescriptor(),
+ File::eOpenOptionWriteOnly,
+ NativeFile::Unowned));
+ fromDAP = std::make_unique<Transport>(
+ "fromDAP", nullptr,
+ std::make_shared<NativeFile>(output.GetReadFileDescriptor(),
+ File::eOpenOptionReadOnly,
+ NativeFile::Unowned),
+ std::make_shared<NativeFile>(input.GetWriteFileDescriptor(),
+ File::eOpenOptionWriteOnly,
+ NativeFile::Unowned));
+ }
+};
+
+TEST_F(DAPTest, SendProtocolMessages) {
+ DAP dap{nullptr, ReplMode::Auto, {}, *toDAP};
+ dap.Send(Event{"my-event", std::nullopt});
+ ASSERT_THAT_EXPECTED(fromDAP->Read(std::chrono::milliseconds(1)),
+ HasValue(testing::VariantWith<Event>(testing::FieldsAre(
+ /*event=*/"my-event", /*body=*/std::nullopt))));
+}
>From 8bc4880a338dd0d0f2daa64b77c8bdbf567270b2 Mon Sep 17 00:00:00 2001
From: John Harrison <harjohn at google.com>
Date: Wed, 14 May 2025 10:46:51 -0700
Subject: [PATCH 2/5] Adjusting the naming of variables.
---
lldb/unittests/DAP/DAPTest.cpp | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/lldb/unittests/DAP/DAPTest.cpp b/lldb/unittests/DAP/DAPTest.cpp
index 9d2a9b944678e..8e8c2ea3ccbb0 100644
--- a/lldb/unittests/DAP/DAPTest.cpp
+++ b/lldb/unittests/DAP/DAPTest.cpp
@@ -29,22 +29,22 @@ class DAPTest : public testing::Test {
protected:
Pipe input;
Pipe output;
- std::unique_ptr<Transport> toDAP;
- std::unique_ptr<Transport> fromDAP;
+ std::unique_ptr<Transport> to_dap;
+ std::unique_ptr<Transport> from_dap;
void SetUp() override {
ASSERT_THAT_ERROR(input.CreateNew(false).ToError(), Succeeded());
ASSERT_THAT_ERROR(output.CreateNew(false).ToError(), Succeeded());
- toDAP = std::make_unique<Transport>(
- "toDAP", nullptr,
+ to_dap = std::make_unique<Transport>(
+ "to_dap", nullptr,
std::make_shared<NativeFile>(input.GetReadFileDescriptor(),
File::eOpenOptionReadOnly,
NativeFile::Unowned),
std::make_shared<NativeFile>(output.GetWriteFileDescriptor(),
File::eOpenOptionWriteOnly,
NativeFile::Unowned));
- fromDAP = std::make_unique<Transport>(
- "fromDAP", nullptr,
+ from_dap = std::make_unique<Transport>(
+ "from_dap", nullptr,
std::make_shared<NativeFile>(output.GetReadFileDescriptor(),
File::eOpenOptionReadOnly,
NativeFile::Unowned),
@@ -55,9 +55,9 @@ class DAPTest : public testing::Test {
};
TEST_F(DAPTest, SendProtocolMessages) {
- DAP dap{nullptr, ReplMode::Auto, {}, *toDAP};
+ DAP dap{nullptr, ReplMode::Auto, {}, *to_dap};
dap.Send(Event{"my-event", std::nullopt});
- ASSERT_THAT_EXPECTED(fromDAP->Read(std::chrono::milliseconds(1)),
+ ASSERT_THAT_EXPECTED(from_dap->Read(std::chrono::milliseconds(1)),
HasValue(testing::VariantWith<Event>(testing::FieldsAre(
/*event=*/"my-event", /*body=*/std::nullopt))));
}
>From 41f8f41a6cae98c6e0fe703f5b34f9f3f4acba9a Mon Sep 17 00:00:00 2001
From: John Harrison <harjohn at google.com>
Date: Wed, 14 May 2025 10:51:12 -0700
Subject: [PATCH 3/5] Adding inline comments to improve readability.
---
lldb/unittests/DAP/DAPTest.cpp | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/lldb/unittests/DAP/DAPTest.cpp b/lldb/unittests/DAP/DAPTest.cpp
index 8e8c2ea3ccbb0..e23fb32eebea9 100644
--- a/lldb/unittests/DAP/DAPTest.cpp
+++ b/lldb/unittests/DAP/DAPTest.cpp
@@ -55,8 +55,9 @@ class DAPTest : public testing::Test {
};
TEST_F(DAPTest, SendProtocolMessages) {
- DAP dap{nullptr, ReplMode::Auto, {}, *to_dap};
- dap.Send(Event{"my-event", std::nullopt});
+ DAP dap{/*log=*/nullptr, /*default_repl_mode=*/ReplMode::Auto,
+ /*pre_init_commands=*/{}, /*transport=*/*to_dap};
+ dap.Send(Event{/*event=*/"my-event", /*body=*/std::nullopt});
ASSERT_THAT_EXPECTED(from_dap->Read(std::chrono::milliseconds(1)),
HasValue(testing::VariantWith<Event>(testing::FieldsAre(
/*event=*/"my-event", /*body=*/std::nullopt))));
>From e6dfa922161b70228a38f2bcd52776efb64ae6c1 Mon Sep 17 00:00:00 2001
From: John Harrison <harjohn at google.com>
Date: Wed, 14 May 2025 13:07:10 -0700
Subject: [PATCH 4/5] Add some helper test bases classes and a Handler test as
well.
---
lldb/unittests/DAP/CMakeLists.txt | 6 +-
lldb/unittests/DAP/DAPTest.cpp | 46 +++---------
.../Handler/DisconnectRequestHandlerTest.cpp | 34 +++++++++
lldb/unittests/DAP/TestBase.cpp | 70 +++++++++++++++++++
lldb/unittests/DAP/TestBase.h | 46 ++++++++++++
lldb/unittests/DAP/TransportTest.cpp | 24 +++----
6 files changed, 174 insertions(+), 52 deletions(-)
create mode 100644 lldb/unittests/DAP/Handler/DisconnectRequestHandlerTest.cpp
create mode 100644 lldb/unittests/DAP/TestBase.cpp
create mode 100644 lldb/unittests/DAP/TestBase.h
diff --git a/lldb/unittests/DAP/CMakeLists.txt b/lldb/unittests/DAP/CMakeLists.txt
index 6074e9b872c49..4b3447ae3310a 100644
--- a/lldb/unittests/DAP/CMakeLists.txt
+++ b/lldb/unittests/DAP/CMakeLists.txt
@@ -1,9 +1,11 @@
add_lldb_unittest(DAPTests
+ DAPTest.cpp
+ Handler/DisconnectRequestHandlerTest.cpp
JSONUtilsTest.cpp
LLDBUtilsTest.cpp
- TransportTest.cpp
ProtocolTypesTest.cpp
- DAPTest.cpp
+ TestBase.cpp
+ TransportTest.cpp
LINK_LIBS
lldbDAP
diff --git a/lldb/unittests/DAP/DAPTest.cpp b/lldb/unittests/DAP/DAPTest.cpp
index e23fb32eebea9..5fb6bf7e564ab 100644
--- a/lldb/unittests/DAP/DAPTest.cpp
+++ b/lldb/unittests/DAP/DAPTest.cpp
@@ -1,4 +1,4 @@
-//===-- DAPTest.cpp -------------------------------------------------===//
+//===-- DAPTest.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
@@ -8,9 +8,8 @@
#include "DAP.h"
#include "Protocol/ProtocolBase.h"
+#include "TestBase.h"
#include "Transport.h"
-#include "lldb/Host/File.h"
-#include "lldb/Host/Pipe.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#include <chrono>
@@ -20,43 +19,18 @@
using namespace llvm;
using namespace lldb;
using namespace lldb_dap;
+using namespace lldb_dap_tests;
using namespace lldb_dap::protocol;
-using lldb_private::File;
-using lldb_private::NativeFile;
-using lldb_private::Pipe;
-class DAPTest : public testing::Test {
-protected:
- Pipe input;
- Pipe output;
- std::unique_ptr<Transport> to_dap;
- std::unique_ptr<Transport> from_dap;
-
- void SetUp() override {
- ASSERT_THAT_ERROR(input.CreateNew(false).ToError(), Succeeded());
- ASSERT_THAT_ERROR(output.CreateNew(false).ToError(), Succeeded());
- to_dap = std::make_unique<Transport>(
- "to_dap", nullptr,
- std::make_shared<NativeFile>(input.GetReadFileDescriptor(),
- File::eOpenOptionReadOnly,
- NativeFile::Unowned),
- std::make_shared<NativeFile>(output.GetWriteFileDescriptor(),
- File::eOpenOptionWriteOnly,
- NativeFile::Unowned));
- from_dap = std::make_unique<Transport>(
- "from_dap", nullptr,
- std::make_shared<NativeFile>(output.GetReadFileDescriptor(),
- File::eOpenOptionReadOnly,
- NativeFile::Unowned),
- std::make_shared<NativeFile>(input.GetWriteFileDescriptor(),
- File::eOpenOptionWriteOnly,
- NativeFile::Unowned));
- }
-};
+class DAPTest : public TransportBase {};
TEST_F(DAPTest, SendProtocolMessages) {
- DAP dap{/*log=*/nullptr, /*default_repl_mode=*/ReplMode::Auto,
- /*pre_init_commands=*/{}, /*transport=*/*to_dap};
+ DAP dap{
+ /*log=*/nullptr,
+ /*default_repl_mode=*/ReplMode::Auto,
+ /*pre_init_commands=*/{},
+ /*transport=*/*to_dap,
+ };
dap.Send(Event{/*event=*/"my-event", /*body=*/std::nullopt});
ASSERT_THAT_EXPECTED(from_dap->Read(std::chrono::milliseconds(1)),
HasValue(testing::VariantWith<Event>(testing::FieldsAre(
diff --git a/lldb/unittests/DAP/Handler/DisconnectRequestHandlerTest.cpp b/lldb/unittests/DAP/Handler/DisconnectRequestHandlerTest.cpp
new file mode 100644
index 0000000000000..0ef763574e8df
--- /dev/null
+++ b/lldb/unittests/DAP/Handler/DisconnectRequestHandlerTest.cpp
@@ -0,0 +1,34 @@
+//===-- DisconnectRequestHandlerTest.cpp ----------------------------------===//
+//
+// 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 "DAP.h"
+#include "Handler/RequestHandler.h"
+#include "Protocol/ProtocolBase.h"
+#include "TestBase.h"
+#include "llvm/Testing/Support/Error.h"
+#include "gtest/gtest.h"
+#include <memory>
+#include <optional>
+
+using namespace llvm;
+using namespace lldb;
+using namespace lldb_dap;
+using namespace lldb_dap_tests;
+using namespace lldb_dap::protocol;
+
+class DisconnectRequestHandlerTest : public DAPTestBase {};
+
+TEST_F(DisconnectRequestHandlerTest, DisconnectingTriggersTerminated) {
+ DisconnectRequestHandler handler(*dap);
+ ASSERT_THAT_ERROR(handler.Run(std::nullopt), Succeeded());
+ EXPECT_TRUE(dap->disconnecting);
+ std::vector<Message> messages = DrainOutput();
+ EXPECT_THAT(messages,
+ testing::Contains(testing::VariantWith<Event>(testing::FieldsAre(
+ /*event=*/"terminated", /*body=*/std::nullopt))));
+}
diff --git a/lldb/unittests/DAP/TestBase.cpp b/lldb/unittests/DAP/TestBase.cpp
new file mode 100644
index 0000000000000..08dda62e217c3
--- /dev/null
+++ b/lldb/unittests/DAP/TestBase.cpp
@@ -0,0 +1,70 @@
+//===-- TestBase.cpp -------------------------------------------------===//
+//
+// 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 "TestBase.h"
+#include "Protocol/ProtocolBase.h"
+#include "lldb/Host/File.h"
+#include "lldb/Host/Pipe.h"
+#include "llvm/Testing/Support/Error.h"
+
+using namespace llvm;
+using namespace lldb;
+using namespace lldb_dap;
+using namespace lldb_dap::protocol;
+using namespace lldb_dap_tests;
+using lldb_private::File;
+using lldb_private::NativeFile;
+using lldb_private::Pipe;
+
+void PipeBase::SetUp() {
+ ASSERT_THAT_ERROR(input.CreateNew(false).ToError(), Succeeded());
+ ASSERT_THAT_ERROR(output.CreateNew(false).ToError(), Succeeded());
+}
+
+void TransportBase::SetUp() {
+ PipeBase::SetUp();
+ to_dap = std::make_unique<Transport>(
+ "to_dap", nullptr,
+ std::make_shared<NativeFile>(input.GetReadFileDescriptor(),
+ File::eOpenOptionReadOnly,
+ NativeFile::Unowned),
+ std::make_shared<NativeFile>(output.GetWriteFileDescriptor(),
+ File::eOpenOptionWriteOnly,
+ NativeFile::Unowned));
+ from_dap = std::make_unique<Transport>(
+ "from_dap", nullptr,
+ std::make_shared<NativeFile>(output.GetReadFileDescriptor(),
+ File::eOpenOptionReadOnly,
+ NativeFile::Unowned),
+ std::make_shared<NativeFile>(input.GetWriteFileDescriptor(),
+ File::eOpenOptionWriteOnly,
+ NativeFile::Unowned));
+}
+
+void DAPTestBase::SetUp() {
+ TransportBase::SetUp();
+ dap = std::make_unique<DAP>(
+ /*log=*/nullptr,
+ /*default_repl_mode=*/ReplMode::Auto,
+ /*pre_init_commands=*/std::vector<std::string>(),
+ /*transport=*/*to_dap);
+}
+
+std::vector<Message> DAPTestBase::DrainOutput() {
+ std::vector<Message> msgs;
+ output.CloseWriteFileDescriptor();
+ while (true) {
+ Expected<Message> next = from_dap->Read(std::chrono::milliseconds(1));
+ if (!next) {
+ consumeError(next.takeError());
+ break;
+ }
+ msgs.push_back(*next);
+ }
+ return msgs;
+}
\ No newline at end of file
diff --git a/lldb/unittests/DAP/TestBase.h b/lldb/unittests/DAP/TestBase.h
new file mode 100644
index 0000000000000..7f8b2fb5121c6
--- /dev/null
+++ b/lldb/unittests/DAP/TestBase.h
@@ -0,0 +1,46 @@
+//===-- TestBase.cpp ------------------------------------------------------===//
+//
+// 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 "DAP.h"
+#include "Protocol/ProtocolBase.h"
+#include "Transport.h"
+#include "lldb/Host/Pipe.h"
+#include "gtest/gtest.h"
+
+namespace lldb_dap_tests {
+
+/// A base class for tests that need a pair of pipes for communication.
+class PipeBase : public testing::Test {
+protected:
+ lldb_private::Pipe input;
+ lldb_private::Pipe output;
+
+ void SetUp() override;
+};
+
+/// A base class for tests that need transport configured.
+class TransportBase : public PipeBase {
+protected:
+ std::unique_ptr<lldb_dap::Transport> to_dap;
+ std::unique_ptr<lldb_dap::Transport> from_dap;
+
+ void SetUp() override;
+};
+
+class DAPTestBase : public TransportBase {
+protected:
+ std::unique_ptr<lldb_dap::DAP> dap;
+
+ void SetUp() override;
+
+ /// Closes the DAP output pipe and returns the remaining protocol messages in
+ /// the buffer.
+ std::vector<lldb_dap::protocol::Message> DrainOutput();
+};
+
+} // namespace lldb_dap_tests
diff --git a/lldb/unittests/DAP/TransportTest.cpp b/lldb/unittests/DAP/TransportTest.cpp
index 5c77b4bb26343..e6dab42e30941 100644
--- a/lldb/unittests/DAP/TransportTest.cpp
+++ b/lldb/unittests/DAP/TransportTest.cpp
@@ -8,10 +8,10 @@
#include "Transport.h"
#include "Protocol/ProtocolBase.h"
+#include "TestBase.h"
#include "lldb/Host/File.h"
#include "lldb/Host/Pipe.h"
#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/FormatVariadic.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
#include <chrono>
@@ -21,20 +21,18 @@
using namespace llvm;
using namespace lldb;
using namespace lldb_dap;
+using namespace lldb_dap_tests;
using namespace lldb_dap::protocol;
using lldb_private::File;
using lldb_private::NativeFile;
using lldb_private::Pipe;
-class TransportTest : public testing::Test {
+class TransportTest : public PipeBase {
protected:
- Pipe input;
- Pipe output;
std::unique_ptr<Transport> transport;
void SetUp() override {
- ASSERT_THAT_ERROR(input.CreateNew(false).ToError(), Succeeded());
- ASSERT_THAT_ERROR(output.CreateNew(false).ToError(), Succeeded());
+ PipeBase::SetUp();
transport = std::make_unique<Transport>(
"stdio", nullptr,
std::make_shared<NativeFile>(input.GetReadFileDescriptor(),
@@ -44,13 +42,6 @@ class TransportTest : public testing::Test {
File::eOpenOptionWriteOnly,
NativeFile::Unowned));
}
-
- void Write(StringRef json) {
- std::string message =
- formatv("Content-Length: {0}\r\n\r\n{1}", json.size(), json).str();
- ASSERT_THAT_EXPECTED(input.Write(message.data(), message.size()),
- Succeeded());
- }
};
TEST_F(TransportTest, MalformedRequests) {
@@ -65,7 +56,12 @@ TEST_F(TransportTest, MalformedRequests) {
}
TEST_F(TransportTest, Read) {
- Write(R"json({"seq": 1, "type": "request", "command": "abc"})json");
+ std::string json =
+ R"json({"seq": 1, "type": "request", "command": "abc"})json";
+ std::string message =
+ formatv("Content-Length: {0}\r\n\r\n{1}", json.size(), json).str();
+ ASSERT_THAT_EXPECTED(input.Write(message.data(), message.size()),
+ Succeeded());
ASSERT_THAT_EXPECTED(
transport->Read(std::chrono::milliseconds(1)),
HasValue(testing::VariantWith<Request>(testing::FieldsAre(
>From ffcf631009e66ea69bcb26d6c996366e4ea84280 Mon Sep 17 00:00:00 2001
From: John Harrison <harjohn at google.com>
Date: Wed, 14 May 2025 13:11:27 -0700
Subject: [PATCH 5/5] Fix TestBase.cpp doc comment.
---
lldb/unittests/DAP/TestBase.cpp | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lldb/unittests/DAP/TestBase.cpp b/lldb/unittests/DAP/TestBase.cpp
index 08dda62e217c3..96d1248e14917 100644
--- a/lldb/unittests/DAP/TestBase.cpp
+++ b/lldb/unittests/DAP/TestBase.cpp
@@ -1,4 +1,4 @@
-//===-- TestBase.cpp -------------------------------------------------===//
+//===-- TestBase.cpp ------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
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