labath updated this revision to Diff 120714.
labath added a comment.
rename argument to normalized_triple, check that the architecture is not empty.
https://reviews.llvm.org/D39387
Files:
include/lldb/Core/ArchSpec.h
include/lldb/Host/HostInfoBase.h
include/lldb/Target/Platform.h
packages/Python/lldbsuite/test/source-manager/main.c
source/API/SBDebugger.cpp
source/API/SBInstruction.cpp
source/API/SBTarget.cpp
source/Commands/CommandObjectDisassemble.cpp
source/Commands/CommandObjectPlatform.cpp
source/Core/ArchSpec.cpp
source/Host/common/HostInfoBase.cpp
source/Interpreter/OptionGroupArchitecture.cpp
source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
source/Target/Platform.cpp
source/Target/Process.cpp
unittests/Host/CMakeLists.txt
unittests/Host/HostInfoTest.cpp
unittests/UnwindAssembly/InstEmulation/TestArm64InstEmulation.cpp
unittests/UnwindAssembly/x86/Testx86AssemblyInspectionEngine.cpp
Index: unittests/UnwindAssembly/x86/Testx86AssemblyInspectionEngine.cpp
===================================================================
--- unittests/UnwindAssembly/x86/Testx86AssemblyInspectionEngine.cpp
+++ unittests/UnwindAssembly/x86/Testx86AssemblyInspectionEngine.cpp
@@ -95,7 +95,7 @@
std::unique_ptr<x86AssemblyInspectionEngine> Getx86_64Inspector() {
- ArchSpec arch("x86_64-apple-macosx", nullptr);
+ ArchSpec arch("x86_64-apple-macosx");
std::unique_ptr<x86AssemblyInspectionEngine> engine(
new x86AssemblyInspectionEngine(arch));
@@ -114,7 +114,7 @@
std::unique_ptr<x86AssemblyInspectionEngine> Geti386Inspector() {
- ArchSpec arch("i386-apple-macosx", nullptr);
+ ArchSpec arch("i386-apple-macosx");
std::unique_ptr<x86AssemblyInspectionEngine> engine(
new x86AssemblyInspectionEngine(arch));
Index: unittests/UnwindAssembly/InstEmulation/TestArm64InstEmulation.cpp
===================================================================
--- unittests/UnwindAssembly/InstEmulation/TestArm64InstEmulation.cpp
+++ unittests/UnwindAssembly/InstEmulation/TestArm64InstEmulation.cpp
@@ -55,7 +55,7 @@
}
TEST_F(TestArm64InstEmulation, TestSimpleDarwinFunction) {
- ArchSpec arch("arm64-apple-ios10", nullptr);
+ ArchSpec arch("arm64-apple-ios10");
UnwindAssemblyInstEmulation *engine =
static_cast<UnwindAssemblyInstEmulation *>(
UnwindAssemblyInstEmulation::CreateInstance(arch));
@@ -151,7 +151,7 @@
}
TEST_F(TestArm64InstEmulation, TestMediumDarwinFunction) {
- ArchSpec arch("arm64-apple-ios10", nullptr);
+ ArchSpec arch("arm64-apple-ios10");
UnwindAssemblyInstEmulation *engine =
static_cast<UnwindAssemblyInstEmulation *>(
UnwindAssemblyInstEmulation::CreateInstance(arch));
@@ -313,7 +313,7 @@
}
TEST_F(TestArm64InstEmulation, TestFramelessThreeEpilogueFunction) {
- ArchSpec arch("arm64-apple-ios10", nullptr);
+ ArchSpec arch("arm64-apple-ios10");
UnwindAssemblyInstEmulation *engine =
static_cast<UnwindAssemblyInstEmulation *>(
UnwindAssemblyInstEmulation::CreateInstance(arch));
@@ -408,7 +408,7 @@
}
TEST_F(TestArm64InstEmulation, TestRegisterSavedTwice) {
- ArchSpec arch("arm64-apple-ios10", nullptr);
+ ArchSpec arch("arm64-apple-ios10");
UnwindAssemblyInstEmulation *engine =
static_cast<UnwindAssemblyInstEmulation *>(
UnwindAssemblyInstEmulation::CreateInstance(arch));
@@ -510,7 +510,7 @@
}
TEST_F(TestArm64InstEmulation, TestRegisterDoubleSpills) {
- ArchSpec arch("arm64-apple-ios10", nullptr);
+ ArchSpec arch("arm64-apple-ios10");
UnwindAssemblyInstEmulation *engine =
static_cast<UnwindAssemblyInstEmulation *>(
UnwindAssemblyInstEmulation::CreateInstance(arch));
Index: unittests/Host/HostInfoTest.cpp
===================================================================
--- /dev/null
+++ unittests/Host/HostInfoTest.cpp
@@ -0,0 +1,40 @@
+//===-- HostTest.cpp --------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/HostInfo.h"
+#include "gtest/gtest.h"
+
+using namespace lldb_private;
+using namespace llvm;
+
+namespace {
+class HostInfoTest: public ::testing::Test {
+ public:
+ void SetUp() override { HostInfo::Initialize(); }
+ void TearDown() override { HostInfo::Terminate(); }
+};
+}
+
+TEST_F(HostInfoTest, GetAugmentedArchSpec) {
+ // Fully specified triple should not be changed.
+ ArchSpec spec = HostInfo::GetAugmentedArchSpec("x86_64-pc-linux-gnu");
+ EXPECT_EQ(spec.GetTriple().getTriple(), "x86_64-pc-linux-gnu");
+
+ // Same goes if we specify at least one of (os, vendor, env).
+ spec = HostInfo::GetAugmentedArchSpec("x86_64-pc");
+ EXPECT_EQ(spec.GetTriple().getTriple(), "x86_64-pc");
+
+ // But if we specify only an arch, we should fill in the rest from the host.
+ spec = HostInfo::GetAugmentedArchSpec("x86_64");
+ Triple triple(sys::getDefaultTargetTriple());
+ EXPECT_EQ(spec.GetTriple().getArch(), Triple::x86_64);
+ EXPECT_EQ(spec.GetTriple().getOS(), triple.getOS());
+ EXPECT_EQ(spec.GetTriple().getVendor(), triple.getVendor());
+ EXPECT_EQ(spec.GetTriple().getEnvironment(), triple.getEnvironment());
+}
Index: unittests/Host/CMakeLists.txt
===================================================================
--- unittests/Host/CMakeLists.txt
+++ unittests/Host/CMakeLists.txt
@@ -1,6 +1,7 @@
set (FILES
FileSpecTest.cpp
FileSystemTest.cpp
+ HostInfoTest.cpp
HostTest.cpp
MainLoopTest.cpp
SocketAddressTest.cpp
Index: source/Target/Process.cpp
===================================================================
--- source/Target/Process.cpp
+++ source/Target/Process.cpp
@@ -480,8 +480,8 @@
execution_context ? execution_context->GetTargetSP() : TargetSP();
PlatformSP platform_sp =
target_sp ? target_sp->GetPlatform() : PlatformSP();
- if (!launch_info.GetArchitecture().SetTriple(option_arg, platform_sp.get()))
- launch_info.GetArchitecture().SetTriple(option_arg);
+ launch_info.GetArchitecture() =
+ Platform::GetAugmentedArchSpec(platform_sp.get(), option_arg);
} break;
case 'A': // Disable ASLR.
Index: source/Target/Platform.cpp
===================================================================
--- source/Target/Platform.cpp
+++ source/Target/Platform.cpp
@@ -356,6 +356,12 @@
return platform_sp;
}
+ArchSpec Platform::GetAugmentedArchSpec(Platform *platform, llvm::StringRef triple) {
+ if (platform)
+ return platform->GetAugmentedArchSpec(triple);
+ return HostInfo::GetAugmentedArchSpec(triple);
+}
+
//------------------------------------------------------------------
/// Default Constructor
//------------------------------------------------------------------
@@ -963,6 +969,31 @@
return m_system_arch;
}
+ArchSpec Platform::GetAugmentedArchSpec(llvm::StringRef triple) {
+ if (triple.empty())
+ return ArchSpec();
+ llvm::Triple normalized_triple(llvm::Triple::normalize(triple));
+ if (!ArchSpec::ContainsOnlyArch(normalized_triple))
+ return ArchSpec(triple);
+
+ ArchSpec compatible_arch;
+ ArchSpec raw_arch(triple);
+ if (!IsCompatibleArchitecture(raw_arch, false, &compatible_arch))
+ return raw_arch;
+
+ if (!compatible_arch.IsValid())
+ return ArchSpec(normalized_triple);
+
+ const llvm::Triple &compatible_triple = compatible_arch.GetTriple();
+ if (normalized_triple.getVendorName().empty())
+ normalized_triple.setVendor(compatible_triple.getVendor());
+ if (normalized_triple.getOSName().empty())
+ normalized_triple.setOS(compatible_triple.getOS());
+ if (normalized_triple.getEnvironmentName().empty())
+ normalized_triple.setEnvironment(compatible_triple.getEnvironment());
+ return ArchSpec(normalized_triple);
+}
+
Status Platform::ConnectRemote(Args &args) {
Status error;
if (IsHost())
Index: source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
===================================================================
--- source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
+++ source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerCommon.cpp
@@ -403,8 +403,8 @@
match_info.SetMatchAllUsers(
Args::StringToBoolean(value, false, &success));
} else if (key.equals("triple")) {
- match_info.GetProcessInfo().GetArchitecture().SetTriple(
- value.str().c_str(), NULL);
+ match_info.GetProcessInfo().GetArchitecture() =
+ HostInfo::GetAugmentedArchSpec(value);
} else {
success = false;
}
@@ -973,8 +973,7 @@
const uint32_t bytes_left = packet.GetBytesLeft();
if (bytes_left > 0) {
const char *arch_triple = packet.Peek();
- ArchSpec arch_spec(arch_triple, NULL);
- m_process_launch_info.SetArchitecture(arch_spec);
+ m_process_launch_info.SetArchitecture(HostInfo::GetAugmentedArchSpec(arch_triple));
return SendOKResponse();
}
return SendErrorResponse(13);
Index: source/Interpreter/OptionGroupArchitecture.cpp
===================================================================
--- source/Interpreter/OptionGroupArchitecture.cpp
+++ source/Interpreter/OptionGroupArchitecture.cpp
@@ -8,12 +8,8 @@
//===----------------------------------------------------------------------===//
#include "lldb/Interpreter/OptionGroupArchitecture.h"
-
-// C Includes
-// C++ Includes
-// Other libraries and framework includes
-// Project includes
#include "lldb/Host/OptionParser.h"
+#include "lldb/Target/Platform.h"
using namespace lldb;
using namespace lldb_private;
@@ -34,10 +30,7 @@
bool OptionGroupArchitecture::GetArchitecture(Platform *platform,
ArchSpec &arch) {
- if (m_arch_str.empty())
- arch.Clear();
- else
- arch.SetTriple(m_arch_str.c_str(), platform);
+ arch = Platform::GetAugmentedArchSpec(platform, m_arch_str);
return arch.IsValid();
}
Index: source/Host/common/HostInfoBase.cpp
===================================================================
--- source/Host/common/HostInfoBase.cpp
+++ source/Host/common/HostInfoBase.cpp
@@ -251,6 +251,24 @@
return true;
}
+ArchSpec HostInfoBase::GetAugmentedArchSpec(llvm::StringRef triple) {
+ if (triple.empty())
+ return ArchSpec();
+ llvm::Triple normalized_triple(llvm::Triple::normalize(triple));
+ if (!ArchSpec::ContainsOnlyArch(normalized_triple))
+ return ArchSpec(triple);
+
+ llvm::Triple host_triple(llvm::sys::getDefaultTargetTriple());
+
+ if (normalized_triple.getVendorName().empty())
+ normalized_triple.setVendor(host_triple.getVendor());
+ if (normalized_triple.getOSName().empty())
+ normalized_triple.setOS(host_triple.getOS());
+ if (normalized_triple.getEnvironmentName().empty())
+ normalized_triple.setEnvironment(host_triple.getEnvironment());
+ return ArchSpec(normalized_triple);
+}
+
bool HostInfoBase::ComputeSharedLibraryDirectory(FileSpec &file_spec) {
// To get paths related to LLDB we get the path to the executable that
// contains this function. On MacOSX this will be "LLDB.framework/.../LLDB",
Index: source/Core/ArchSpec.cpp
===================================================================
--- source/Core/ArchSpec.cpp
+++ source/Core/ArchSpec.cpp
@@ -10,7 +10,6 @@
#include "lldb/Core/ArchSpec.h"
#include "lldb/Host/HostInfo.h"
-#include "lldb/Target/Platform.h"
#include "lldb/Utility/NameMatches.h"
#include "lldb/Utility/Stream.h" // for Stream
#include "lldb/Utility/StringList.h"
@@ -555,15 +554,6 @@
ArchSpec::ArchSpec() {}
-ArchSpec::ArchSpec(const char *triple_cstr, Platform *platform) {
- if (triple_cstr)
- SetTriple(triple_cstr, platform);
-}
-
-ArchSpec::ArchSpec(llvm::StringRef triple_str, Platform *platform) {
- SetTriple(triple_str, platform);
-}
-
ArchSpec::ArchSpec(const char *triple_cstr) {
if (triple_cstr)
SetTriple(triple_cstr);
@@ -873,16 +863,6 @@
return true;
}
-bool ArchSpec::SetTriple(const char *triple_cstr) {
- llvm::StringRef str(triple_cstr ? triple_cstr : "");
- return SetTriple(str);
-}
-
-bool ArchSpec::SetTriple(const char *triple_cstr, Platform *platform) {
- llvm::StringRef str(triple_cstr ? triple_cstr : "");
- return SetTriple(str, platform);
-}
-
bool ArchSpec::SetTriple(llvm::StringRef triple) {
if (triple.empty()) {
Clear();
@@ -906,73 +886,11 @@
return IsValid();
}
-bool ArchSpec::SetTriple(llvm::StringRef triple, Platform *platform) {
- if (triple.empty()) {
- Clear();
- return false;
- }
- if (ParseMachCPUDashSubtypeTriple(triple, *this))
- return true;
-
- if (triple.startswith(LLDB_ARCH_DEFAULT)) {
- // Special case for the current host default architectures...
- if (triple.equals(LLDB_ARCH_DEFAULT_32BIT))
- *this = HostInfo::GetArchitecture(HostInfo::eArchKind32);
- else if (triple.equals(LLDB_ARCH_DEFAULT_64BIT))
- *this = HostInfo::GetArchitecture(HostInfo::eArchKind64);
- else if (triple.equals(LLDB_ARCH_DEFAULT))
- *this = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
- return IsValid();
- }
-
- ArchSpec raw_arch(triple);
-
- llvm::Triple normalized_triple(llvm::Triple::normalize(triple));
-
- const bool os_specified = !normalized_triple.getOSName().empty();
- const bool vendor_specified = !normalized_triple.getVendorName().empty();
- const bool env_specified = !normalized_triple.getEnvironmentName().empty();
-
- if (os_specified || vendor_specified || env_specified) {
- SetTriple(normalized_triple);
- return IsValid();
- }
-
- // We got an arch only. If there is no platform, fallback to the host system
- // for defaults.
- if (!platform) {
- llvm::Triple host_triple(llvm::sys::getDefaultTargetTriple());
- if (!vendor_specified)
- normalized_triple.setVendor(host_triple.getVendor());
- if (!vendor_specified)
- normalized_triple.setOS(host_triple.getOS());
- if (!env_specified && host_triple.getEnvironmentName().size())
- normalized_triple.setEnvironment(host_triple.getEnvironment());
- SetTriple(normalized_triple);
- return IsValid();
- }
-
- // If we were given a platform, use the platform's system architecture. If
- // this is not available (might not be connected) use the first supported
- // architecture.
- ArchSpec compatible_arch;
- if (!platform->IsCompatibleArchitecture(raw_arch, false, &compatible_arch)) {
- *this = raw_arch;
- return IsValid();
- }
-
- if (compatible_arch.IsValid()) {
- const llvm::Triple &compatible_triple = compatible_arch.GetTriple();
- if (!vendor_specified)
- normalized_triple.setVendor(compatible_triple.getVendor());
- if (!os_specified)
- normalized_triple.setOS(compatible_triple.getOS());
- if (!env_specified && compatible_triple.hasEnvironment())
- normalized_triple.setEnvironment(compatible_triple.getEnvironment());
- }
-
- SetTriple(normalized_triple);
- return IsValid();
+bool ArchSpec::ContainsOnlyArch(const llvm::Triple &normalized_triple) {
+ return !normalized_triple.getArchName().empty() &&
+ normalized_triple.getOSName().empty() &&
+ normalized_triple.getVendorName().empty() &&
+ normalized_triple.getEnvironmentName().empty();
}
void ArchSpec::MergeFrom(const ArchSpec &other) {
Index: source/Commands/CommandObjectPlatform.cpp
===================================================================
--- source/Commands/CommandObjectPlatform.cpp
+++ source/Commands/CommandObjectPlatform.cpp
@@ -1337,8 +1337,8 @@
PlatformSP platform_sp =
debugger_sp ? debugger_sp->GetPlatformList().GetSelectedPlatform()
: PlatformSP();
- match_info.GetProcessInfo().GetArchitecture().SetTriple(
- option_arg, platform_sp.get());
+ match_info.GetProcessInfo().GetArchitecture() =
+ Platform::GetAugmentedArchSpec(platform_sp.get(), option_arg);
} break;
case 'n':
Index: source/Commands/CommandObjectDisassemble.cpp
===================================================================
--- source/Commands/CommandObjectDisassemble.cpp
+++ source/Commands/CommandObjectDisassemble.cpp
@@ -163,8 +163,7 @@
auto target_sp =
execution_context ? execution_context->GetTargetSP() : TargetSP();
auto platform_sp = target_sp ? target_sp->GetPlatform() : PlatformSP();
- if (!arch.SetTriple(option_arg, platform_sp.get()))
- arch.SetTriple(option_arg);
+ arch = Platform::GetAugmentedArchSpec(platform_sp.get(), option_arg);
}
break;
Index: source/API/SBTarget.cpp
===================================================================
--- source/API/SBTarget.cpp
+++ source/API/SBTarget.cpp
@@ -1442,8 +1442,8 @@
module_spec.GetUUID().SetFromCString(uuid_cstr);
if (triple)
- module_spec.GetArchitecture().SetTriple(triple,
- target_sp->GetPlatform().get());
+ module_spec.GetArchitecture() = Platform::GetAugmentedArchSpec(
+ target_sp->GetPlatform().get(), triple);
else
module_spec.GetArchitecture() = target_sp->GetArchitecture();
Index: source/API/SBInstruction.cpp
===================================================================
--- source/API/SBInstruction.cpp
+++ source/API/SBInstruction.cpp
@@ -20,6 +20,7 @@
#include "lldb/Core/EmulateInstruction.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamFile.h"
+#include "lldb/Host/HostInfo.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/StackFrame.h"
#include "lldb/Target/Target.h"
@@ -259,8 +260,7 @@
bool SBInstruction::DumpEmulation(const char *triple) {
lldb::InstructionSP inst_sp(GetOpaque());
if (inst_sp && triple) {
- lldb_private::ArchSpec arch(triple, NULL);
- return inst_sp->DumpEmulation(arch);
+ return inst_sp->DumpEmulation(HostInfo::GetAugmentedArchSpec(triple));
}
return false;
}
Index: source/API/SBDebugger.cpp
===================================================================
--- source/API/SBDebugger.cpp
+++ source/API/SBDebugger.cpp
@@ -694,8 +694,8 @@
SBTarget sb_target;
if (m_opaque_sp && filename && filename[0]) {
// No need to lock, the target list is thread safe
- ArchSpec arch(arch_name,
- m_opaque_sp->GetPlatformList().GetSelectedPlatform().get());
+ ArchSpec arch = Platform::GetAugmentedArchSpec(
+ m_opaque_sp->GetPlatformList().GetSelectedPlatform().get(), arch_name);
TargetSP target_sp(
m_opaque_sp->GetTargetList().FindTargetWithExecutableAndArchitecture(
FileSpec(filename, false), arch_name ? &arch : nullptr));
Index: packages/Python/lldbsuite/test/source-manager/main.c
===================================================================
--- packages/Python/lldbsuite/test/source-manager/main.c
+++ packages/Python/lldbsuite/test/source-manager/main.c
@@ -1,6 +0,0 @@
-#include <stdio.h>
-
-int main(int argc, char const *argv[]) {
- printf("Hello world.\n"); // Set break point at this line.
- return 0;
-}
Index: include/lldb/Target/Platform.h
===================================================================
--- include/lldb/Target/Platform.h
+++ include/lldb/Target/Platform.h
@@ -117,9 +117,12 @@
static lldb::PlatformSP Create(const ArchSpec &arch,
ArchSpec *platform_arch_ptr, Status &error);
- static uint32_t GetNumConnectedRemotePlatforms();
-
- static lldb::PlatformSP GetConnectedRemotePlatformAtIndex(uint32_t idx);
+ //------------------------------------------------------------------------
+ /// Augments the triple either with information from platform or the host
+ /// system (if platform is null).
+ //------------------------------------------------------------------------
+ static ArchSpec GetAugmentedArchSpec(Platform *platform,
+ llvm::StringRef triple);
//------------------------------------------------------------------
/// Find a platform plugin for a given process.
@@ -513,6 +516,13 @@
m_os_version_set_while_connected = m_system_arch.IsValid();
}
+ //---------------------------------------------------------------------------
+ /// If the triple contains not specify the vendor, os, and environment parts,
+ /// we "augment" these using information from the platform and return the
+ /// resulting ArchSpec object.
+ //---------------------------------------------------------------------------
+ ArchSpec GetAugmentedArchSpec(llvm::StringRef triple);
+
// Used for column widths
size_t GetMaxUserIDNameLength() const { return m_max_uid_name_len; }
Index: include/lldb/Host/HostInfoBase.h
===================================================================
--- include/lldb/Host/HostInfoBase.h
+++ include/lldb/Host/HostInfoBase.h
@@ -81,6 +81,13 @@
//------------------------------------------------------------------
static bool GetLLDBPath(lldb::PathType type, FileSpec &file_spec);
+ //---------------------------------------------------------------------------
+ /// If the triple does not specify the vendor, os, and environment parts, we
+ /// "augment" these using information from the host and return the resulting
+ /// ArchSpec object.
+ //---------------------------------------------------------------------------
+ static ArchSpec GetAugmentedArchSpec(llvm::StringRef triple);
+
protected:
static bool ComputeSharedLibraryDirectory(FileSpec &file_spec);
static bool ComputeSupportExeDirectory(FileSpec &file_spec);
Index: include/lldb/Core/ArchSpec.h
===================================================================
--- include/lldb/Core/ArchSpec.h
+++ include/lldb/Core/ArchSpec.h
@@ -263,8 +263,6 @@
explicit ArchSpec(const llvm::Triple &triple);
explicit ArchSpec(const char *triple_cstr);
explicit ArchSpec(llvm::StringRef triple_str);
- ArchSpec(const char *triple_cstr, Platform *platform);
- ArchSpec(llvm::StringRef triple_str, Platform *platform);
//------------------------------------------------------------------
/// Constructor over architecture name.
///
@@ -288,6 +286,12 @@
//------------------------------------------------------------------
const ArchSpec &operator=(const ArchSpec &rhs);
+ //---------------------------------------------------------------------------
+ /// Returns true if the OS, vendor and environment fields of the triple are
+ /// unset. The triple is expected to be normalized (llvm::Triple::normalize).
+ //---------------------------------------------------------------------------
+ static bool ContainsOnlyArch(const llvm::Triple &normalized_triple);
+
static size_t AutoComplete(llvm::StringRef name, StringList &matches);
//------------------------------------------------------------------
@@ -520,10 +524,6 @@
bool SetTriple(const llvm::Triple &triple);
bool SetTriple(llvm::StringRef triple_str);
- bool SetTriple(llvm::StringRef triple_str, Platform *platform);
-
- bool SetTriple(const char *triple_cstr);
- bool SetTriple(const char *triple_cstr, Platform *platform);
//------------------------------------------------------------------
/// Returns the default endianness of the architecture.
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