From 0cd3943fb8857eba64f8590fd6137648f3fcb198 Mon Sep 17 00:00:00 2001
From: Christopher Ferris <cferris@google.com>
Date: Wed, 20 Apr 2022 17:15:38 -0700
Subject: Use #pragma once header guard.

Move to using the #pragma once header guard instead of the #ifndef
construct since it's cleaner.

Test: Compiles.
Change-Id: I0bd76b53cfc78df7465029ef34783f85651a9c74
---
 libunwindstack/include/unwindstack/AndroidUnwinder.h | 5 +----
 libunwindstack/include/unwindstack/Arch.h            | 5 +----
 libunwindstack/include/unwindstack/DexFiles.h        | 5 +----
 libunwindstack/include/unwindstack/DwarfError.h      | 5 +----
 libunwindstack/include/unwindstack/DwarfLocation.h   | 5 +----
 libunwindstack/include/unwindstack/DwarfMemory.h     | 5 +----
 libunwindstack/include/unwindstack/DwarfSection.h    | 5 +----
 libunwindstack/include/unwindstack/DwarfStructs.h    | 5 +----
 libunwindstack/include/unwindstack/Elf.h             | 5 +----
 libunwindstack/include/unwindstack/ElfInterface.h    | 5 +----
 libunwindstack/include/unwindstack/Error.h           | 5 +----
 libunwindstack/include/unwindstack/Global.h          | 5 +----
 libunwindstack/include/unwindstack/JitDebug.h        | 5 +----
 libunwindstack/include/unwindstack/Log.h             | 5 +----
 libunwindstack/include/unwindstack/MachineArm.h      | 5 +----
 libunwindstack/include/unwindstack/MachineArm64.h    | 5 +----
 libunwindstack/include/unwindstack/MachineMips.h     | 5 +----
 libunwindstack/include/unwindstack/MachineMips64.h   | 5 +----
 libunwindstack/include/unwindstack/MachineX86.h      | 5 +----
 libunwindstack/include/unwindstack/MachineX86_64.h   | 5 +----
 libunwindstack/include/unwindstack/MapInfo.h         | 5 +----
 libunwindstack/include/unwindstack/Maps.h            | 5 +----
 libunwindstack/include/unwindstack/Memory.h          | 5 +----
 libunwindstack/include/unwindstack/Regs.h            | 5 +----
 libunwindstack/include/unwindstack/RegsArm.h         | 5 +----
 libunwindstack/include/unwindstack/RegsArm64.h       | 5 +----
 libunwindstack/include/unwindstack/RegsGetLocal.h    | 6 +-----
 libunwindstack/include/unwindstack/RegsMips.h        | 5 +----
 libunwindstack/include/unwindstack/RegsMips64.h      | 5 +----
 libunwindstack/include/unwindstack/RegsX86.h         | 5 +----
 libunwindstack/include/unwindstack/RegsX86_64.h      | 5 +----
 libunwindstack/include/unwindstack/SharedString.h    | 4 +---
 libunwindstack/include/unwindstack/UcontextArm.h     | 5 +----
 libunwindstack/include/unwindstack/UcontextArm64.h   | 5 +----
 libunwindstack/include/unwindstack/UcontextMips.h    | 5 +----
 libunwindstack/include/unwindstack/UcontextMips64.h  | 5 +----
 libunwindstack/include/unwindstack/UcontextX86.h     | 5 +----
 libunwindstack/include/unwindstack/UcontextX86_64.h  | 5 +----
 libunwindstack/include/unwindstack/Unwinder.h        | 5 +----
 libunwindstack/include/unwindstack/UserArm.h         | 5 +----
 libunwindstack/include/unwindstack/UserArm64.h       | 5 +----
 libunwindstack/include/unwindstack/UserMips.h        | 5 +----
 libunwindstack/include/unwindstack/UserMips64.h      | 5 +----
 libunwindstack/include/unwindstack/UserX86.h         | 5 +----
 libunwindstack/include/unwindstack/UserX86_64.h      | 5 +----
 45 files changed, 45 insertions(+), 180 deletions(-)

(limited to 'libunwindstack/include/unwindstack')

diff --git a/libunwindstack/include/unwindstack/AndroidUnwinder.h b/libunwindstack/include/unwindstack/AndroidUnwinder.h
index 3f82429..de5579d 100644
--- a/libunwindstack/include/unwindstack/AndroidUnwinder.h
+++ b/libunwindstack/include/unwindstack/AndroidUnwinder.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_ANDROID_UNWINDER_H
-#define _LIBUNWINDSTACK_ANDROID_UNWINDER_H
+#pragma once
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -160,5 +159,3 @@ class AndroidRemoteUnwinder : public AndroidUnwinder {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_ANDROID_UNWINDER_H
diff --git a/libunwindstack/include/unwindstack/Arch.h b/libunwindstack/include/unwindstack/Arch.h
index 7060004..42180b4 100644
--- a/libunwindstack/include/unwindstack/Arch.h
+++ b/libunwindstack/include/unwindstack/Arch.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_ARCH_H
-#define _LIBUNWINDSTACK_ARCH_H
+#pragma once
 
 #include <stddef.h>
 
@@ -43,5 +42,3 @@ static inline bool ArchIs32Bit(ArchEnum arch) {
 }
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_ARCH_H
diff --git a/libunwindstack/include/unwindstack/DexFiles.h b/libunwindstack/include/unwindstack/DexFiles.h
index 2a1b770..101d772 100644
--- a/libunwindstack/include/unwindstack/DexFiles.h
+++ b/libunwindstack/include/unwindstack/DexFiles.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DEX_FILES_H
-#define _LIBUNWINDSTACK_DEX_FILES_H
+#pragma once
 
 #include <stdint.h>
 
@@ -36,5 +35,3 @@ std::unique_ptr<DexFiles> CreateDexFiles(ArchEnum arch, std::shared_ptr<Memory>&
                                          std::vector<std::string> search_libs = {});
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DEX_FILES_H
diff --git a/libunwindstack/include/unwindstack/DwarfError.h b/libunwindstack/include/unwindstack/DwarfError.h
index 763e2cb..6143523 100644
--- a/libunwindstack/include/unwindstack/DwarfError.h
+++ b/libunwindstack/include/unwindstack/DwarfError.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DWARF_ERROR_H
-#define _LIBUNWINDSTACK_DWARF_ERROR_H
+#pragma once
 
 #include <stdint.h>
 
@@ -40,5 +39,3 @@ struct DwarfErrorData {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DWARF_ERROR_H
diff --git a/libunwindstack/include/unwindstack/DwarfLocation.h b/libunwindstack/include/unwindstack/DwarfLocation.h
index 22ed47a..9726f15 100644
--- a/libunwindstack/include/unwindstack/DwarfLocation.h
+++ b/libunwindstack/include/unwindstack/DwarfLocation.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DWARF_LOCATION_H
-#define _LIBUNWINDSTACK_DWARF_LOCATION_H
+#pragma once
 
 #include <stdint.h>
 
@@ -49,5 +48,3 @@ struct DwarfLocations : public std::unordered_map<uint32_t, DwarfLocation> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DWARF_LOCATION_H
diff --git a/libunwindstack/include/unwindstack/DwarfMemory.h b/libunwindstack/include/unwindstack/DwarfMemory.h
index c45699a..2ef3b30 100644
--- a/libunwindstack/include/unwindstack/DwarfMemory.h
+++ b/libunwindstack/include/unwindstack/DwarfMemory.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DWARF_MEMORY_H
-#define _LIBUNWINDSTACK_DWARF_MEMORY_H
+#pragma once
 
 #include <stdint.h>
 
@@ -72,5 +71,3 @@ class DwarfMemory {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DWARF_MEMORY_H
diff --git a/libunwindstack/include/unwindstack/DwarfSection.h b/libunwindstack/include/unwindstack/DwarfSection.h
index 71ca62e..33435b2 100644
--- a/libunwindstack/include/unwindstack/DwarfSection.h
+++ b/libunwindstack/include/unwindstack/DwarfSection.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DWARF_SECTION_H
-#define _LIBUNWINDSTACK_DWARF_SECTION_H
+#pragma once
 
 #include <stdint.h>
 
@@ -179,5 +178,3 @@ class DwarfSectionImpl : public DwarfSection {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DWARF_SECTION_H
diff --git a/libunwindstack/include/unwindstack/DwarfStructs.h b/libunwindstack/include/unwindstack/DwarfStructs.h
index 3d8c2db..4c05360 100644
--- a/libunwindstack/include/unwindstack/DwarfStructs.h
+++ b/libunwindstack/include/unwindstack/DwarfStructs.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_DWARF_STRUCTS_H
-#define _LIBUNWINDSTACK_DWARF_STRUCTS_H
+#pragma once
 
 #include <stdint.h>
 
@@ -51,5 +50,3 @@ struct DwarfFde {
 constexpr uint16_t CFA_REG = static_cast<uint16_t>(-1);
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_DWARF_STRUCTS_H
diff --git a/libunwindstack/include/unwindstack/Elf.h b/libunwindstack/include/unwindstack/Elf.h
index 73ffda9..0985042 100644
--- a/libunwindstack/include/unwindstack/Elf.h
+++ b/libunwindstack/include/unwindstack/Elf.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_ELF_H
-#define _LIBUNWINDSTACK_ELF_H
+#pragma once
 
 #include <stddef.h>
 
@@ -138,5 +137,3 @@ class Elf {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_ELF_H
diff --git a/libunwindstack/include/unwindstack/ElfInterface.h b/libunwindstack/include/unwindstack/ElfInterface.h
index 23b7256..a192450 100644
--- a/libunwindstack/include/unwindstack/ElfInterface.h
+++ b/libunwindstack/include/unwindstack/ElfInterface.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_ELF_INTERFACE_H
-#define _LIBUNWINDSTACK_ELF_INTERFACE_H
+#pragma once
 
 #include <elf.h>
 #include <stdint.h>
@@ -225,5 +224,3 @@ using ElfInterface32 = ElfInterfaceImpl<ElfTypes32>;
 using ElfInterface64 = ElfInterfaceImpl<ElfTypes64>;
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_ELF_INTERFACE_H
diff --git a/libunwindstack/include/unwindstack/Error.h b/libunwindstack/include/unwindstack/Error.h
index abd59ad..3a3c646 100644
--- a/libunwindstack/include/unwindstack/Error.h
+++ b/libunwindstack/include/unwindstack/Error.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_ERROR_H
-#define _LIBUNWINDSTACK_ERROR_H
+#pragma once
 
 #include <stdint.h>
 
@@ -87,5 +86,3 @@ struct ErrorData {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_ERROR_H
diff --git a/libunwindstack/include/unwindstack/Global.h b/libunwindstack/include/unwindstack/Global.h
index b790832..d12ecb1 100644
--- a/libunwindstack/include/unwindstack/Global.h
+++ b/libunwindstack/include/unwindstack/Global.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_GLOBAL_H
-#define _LIBUNWINDSTACK_GLOBAL_H
+#pragma once
 
 #include <stdint.h>
 
@@ -59,5 +58,3 @@ class Global {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_GLOBAL_H
diff --git a/libunwindstack/include/unwindstack/JitDebug.h b/libunwindstack/include/unwindstack/JitDebug.h
index cfa8f7e..8653f94 100644
--- a/libunwindstack/include/unwindstack/JitDebug.h
+++ b/libunwindstack/include/unwindstack/JitDebug.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_JIT_DEBUG_H
-#define _LIBUNWINDSTACK_JIT_DEBUG_H
+#pragma once
 
 #include <stdint.h>
 
@@ -36,5 +35,3 @@ std::unique_ptr<JitDebug> CreateJitDebug(ArchEnum arch, std::shared_ptr<Memory>&
                                          std::vector<std::string> search_libs = {});
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_JIT_DEBUG_H
diff --git a/libunwindstack/include/unwindstack/Log.h b/libunwindstack/include/unwindstack/Log.h
index 56de7e0..34eb218 100644
--- a/libunwindstack/include/unwindstack/Log.h
+++ b/libunwindstack/include/unwindstack/Log.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_LOG_H
-#define _LIBUNWINDSTACK_LOG_H
+#pragma once
 
 #include <stdarg.h>
 #include <stdint.h>
@@ -36,5 +35,3 @@ void AsyncSafe(const char* format, ...) __printflike(1, 2);
 }  // namespace Log
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_LOG_H
diff --git a/libunwindstack/include/unwindstack/MachineArm.h b/libunwindstack/include/unwindstack/MachineArm.h
index 3f902b1..6b8198e 100644
--- a/libunwindstack/include/unwindstack/MachineArm.h
+++ b/libunwindstack/include/unwindstack/MachineArm.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_ARM_H
-#define _LIBUNWINDSTACK_MACHINE_ARM_H
+#pragma once
 
 #include <stdint.h>
 
@@ -46,5 +45,3 @@ enum ArmReg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_ARM_H
diff --git a/libunwindstack/include/unwindstack/MachineArm64.h b/libunwindstack/include/unwindstack/MachineArm64.h
index 358e3d9..f1b7c1d 100644
--- a/libunwindstack/include/unwindstack/MachineArm64.h
+++ b/libunwindstack/include/unwindstack/MachineArm64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_ARM64_H
-#define _LIBUNWINDSTACK_MACHINE_ARM64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -70,5 +69,3 @@ enum Arm64Reg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_ARM64_H
diff --git a/libunwindstack/include/unwindstack/MachineMips.h b/libunwindstack/include/unwindstack/MachineMips.h
index 2dfb1e9..6a96536 100644
--- a/libunwindstack/include/unwindstack/MachineMips.h
+++ b/libunwindstack/include/unwindstack/MachineMips.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_MIPS_H
-#define _LIBUNWINDSTACK_MACHINE_MIPS_H
+#pragma once
 
 #include <stdint.h>
 
@@ -62,5 +61,3 @@ enum MipsReg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_MIPS_H
\ No newline at end of file
diff --git a/libunwindstack/include/unwindstack/MachineMips64.h b/libunwindstack/include/unwindstack/MachineMips64.h
index 34addf2..e148efc 100644
--- a/libunwindstack/include/unwindstack/MachineMips64.h
+++ b/libunwindstack/include/unwindstack/MachineMips64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_MIPS64_H
-#define _LIBUNWINDSTACK_MACHINE_MIPS64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -62,5 +61,3 @@ enum Mips64Reg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_MIPS64_H
\ No newline at end of file
diff --git a/libunwindstack/include/unwindstack/MachineX86.h b/libunwindstack/include/unwindstack/MachineX86.h
index 02adb98..ff4fd4b 100644
--- a/libunwindstack/include/unwindstack/MachineX86.h
+++ b/libunwindstack/include/unwindstack/MachineX86.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_X86_H
-#define _LIBUNWINDSTACK_MACHINE_X86_H
+#pragma once
 
 #include <stdint.h>
 
@@ -47,5 +46,3 @@ enum X86Reg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_X86_H
diff --git a/libunwindstack/include/unwindstack/MachineX86_64.h b/libunwindstack/include/unwindstack/MachineX86_64.h
index af33fea..66670e3 100644
--- a/libunwindstack/include/unwindstack/MachineX86_64.h
+++ b/libunwindstack/include/unwindstack/MachineX86_64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MACHINE_X86_64_H
-#define _LIBUNWINDSTACK_MACHINE_X86_64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -48,5 +47,3 @@ enum X86_64Reg : uint16_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MACHINE_X86_64_H
diff --git a/libunwindstack/include/unwindstack/MapInfo.h b/libunwindstack/include/unwindstack/MapInfo.h
index ce4dbea..12711f5 100644
--- a/libunwindstack/include/unwindstack/MapInfo.h
+++ b/libunwindstack/include/unwindstack/MapInfo.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MAP_INFO_H
-#define _LIBUNWINDSTACK_MAP_INFO_H
+#pragma once
 
 #include <stdint.h>
 
@@ -232,5 +231,3 @@ class MapInfo {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MAP_INFO_H
diff --git a/libunwindstack/include/unwindstack/Maps.h b/libunwindstack/include/unwindstack/Maps.h
index deaca6f..d9e1383 100644
--- a/libunwindstack/include/unwindstack/Maps.h
+++ b/libunwindstack/include/unwindstack/Maps.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MAPS_H
-#define _LIBUNWINDSTACK_MAPS_H
+#pragma once
 
 #include <pthread.h>
 #include <sys/types.h>
@@ -138,5 +137,3 @@ class FileMaps : public Maps {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MAPS_H
diff --git a/libunwindstack/include/unwindstack/Memory.h b/libunwindstack/include/unwindstack/Memory.h
index b7bede6..d6ca29e 100644
--- a/libunwindstack/include/unwindstack/Memory.h
+++ b/libunwindstack/include/unwindstack/Memory.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_MEMORY_H
-#define _LIBUNWINDSTACK_MEMORY_H
+#pragma once
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -65,5 +64,3 @@ class Memory {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_MEMORY_H
diff --git a/libunwindstack/include/unwindstack/Regs.h b/libunwindstack/include/unwindstack/Regs.h
index 1f01f92..e49370d 100644
--- a/libunwindstack/include/unwindstack/Regs.h
+++ b/libunwindstack/include/unwindstack/Regs.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_H
-#define _LIBUNWINDSTACK_REGS_H
+#pragma once
 
 #include <stdint.h>
 #include <unistd.h>
@@ -117,5 +116,3 @@ class RegsImpl : public Regs {
 uint64_t GetPcAdjustment(uint64_t rel_pc, Elf* elf, ArchEnum arch);
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_H
diff --git a/libunwindstack/include/unwindstack/RegsArm.h b/libunwindstack/include/unwindstack/RegsArm.h
index fbb34e7..5596605 100644
--- a/libunwindstack/include/unwindstack/RegsArm.h
+++ b/libunwindstack/include/unwindstack/RegsArm.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_ARM_H
-#define _LIBUNWINDSTACK_REGS_ARM_H
+#pragma once
 
 #include <stdint.h>
 
@@ -56,5 +55,3 @@ class RegsArm : public RegsImpl<uint32_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_ARM_H
diff --git a/libunwindstack/include/unwindstack/RegsArm64.h b/libunwindstack/include/unwindstack/RegsArm64.h
index 508366e..d12a043 100644
--- a/libunwindstack/include/unwindstack/RegsArm64.h
+++ b/libunwindstack/include/unwindstack/RegsArm64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_ARM64_H
-#define _LIBUNWINDSTACK_REGS_ARM64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -73,5 +72,3 @@ class RegsArm64 : public RegsImpl<uint64_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_ARM64_H
diff --git a/libunwindstack/include/unwindstack/RegsGetLocal.h b/libunwindstack/include/unwindstack/RegsGetLocal.h
index ac171b9..bf3f767 100644
--- a/libunwindstack/include/unwindstack/RegsGetLocal.h
+++ b/libunwindstack/include/unwindstack/RegsGetLocal.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_GET_LOCAL_H
-#define _LIBUNWINDSTACK_REGS_GET_LOCAL_H
+#pragma once
 
 namespace unwindstack {
 
@@ -91,7 +90,4 @@ inline __attribute__((__always_inline__)) void RegsGetLocal(Regs* regs) {
   AsmGetRegs(regs->RawData());
 }
 
-
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_GET_LOCAL_H
diff --git a/libunwindstack/include/unwindstack/RegsMips.h b/libunwindstack/include/unwindstack/RegsMips.h
index dc09b83..61e4dbf 100644
--- a/libunwindstack/include/unwindstack/RegsMips.h
+++ b/libunwindstack/include/unwindstack/RegsMips.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_MIPS_H
-#define _LIBUNWINDSTACK_REGS_MIPS_H
+#pragma once
 
 #include <stdint.h>
 
@@ -56,5 +55,3 @@ class RegsMips : public RegsImpl<uint32_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_MIPS_H
diff --git a/libunwindstack/include/unwindstack/RegsMips64.h b/libunwindstack/include/unwindstack/RegsMips64.h
index 64a80dc..012a8f0 100644
--- a/libunwindstack/include/unwindstack/RegsMips64.h
+++ b/libunwindstack/include/unwindstack/RegsMips64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_MIPS64_H
-#define _LIBUNWINDSTACK_REGS_MIPS64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -56,5 +55,3 @@ class RegsMips64 : public RegsImpl<uint64_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_MIPS64_H
diff --git a/libunwindstack/include/unwindstack/RegsX86.h b/libunwindstack/include/unwindstack/RegsX86.h
index cfbdda6..d8245ee 100644
--- a/libunwindstack/include/unwindstack/RegsX86.h
+++ b/libunwindstack/include/unwindstack/RegsX86.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_X86_H
-#define _LIBUNWINDSTACK_REGS_X86_H
+#pragma once
 
 #include <stdint.h>
 
@@ -59,5 +58,3 @@ class RegsX86 : public RegsImpl<uint32_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_X86_H
diff --git a/libunwindstack/include/unwindstack/RegsX86_64.h b/libunwindstack/include/unwindstack/RegsX86_64.h
index a11aef0..90fee93 100644
--- a/libunwindstack/include/unwindstack/RegsX86_64.h
+++ b/libunwindstack/include/unwindstack/RegsX86_64.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_REGS_X86_64_H
-#define _LIBUNWINDSTACK_REGS_X86_64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -59,5 +58,3 @@ class RegsX86_64 : public RegsImpl<uint64_t> {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_REGS_X86_64_H
diff --git a/libunwindstack/include/unwindstack/SharedString.h b/libunwindstack/include/unwindstack/SharedString.h
index a82c4fe..1eb4e21 100644
--- a/libunwindstack/include/unwindstack/SharedString.h
+++ b/libunwindstack/include/unwindstack/SharedString.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_SHAREDSTRING_H
-#define _LIBUNWINDSTACK_SHAREDSTRING_H
+#pragma once
 
 #include <memory>
 #include <string>
@@ -73,4 +72,3 @@ static inline std::string operator+(const char* a, const SharedString& b) {
 }
 
 }  // namespace unwindstack
-#endif  // _LIBUNWINDSTACK_SHAREDSTRING_H
diff --git a/libunwindstack/include/unwindstack/UcontextArm.h b/libunwindstack/include/unwindstack/UcontextArm.h
index 7d1ec3b..0d7f90d 100644
--- a/libunwindstack/include/unwindstack/UcontextArm.h
+++ b/libunwindstack/include/unwindstack/UcontextArm.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_ARM_H
-#define _LIBUNWINDSTACK_UCONTEXT_ARM_H
+#pragma once
 
 #include <stdint.h>
 
@@ -59,5 +58,3 @@ struct arm_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_ARM_H
diff --git a/libunwindstack/include/unwindstack/UcontextArm64.h b/libunwindstack/include/unwindstack/UcontextArm64.h
index a68be3b..49278b3 100644
--- a/libunwindstack/include/unwindstack/UcontextArm64.h
+++ b/libunwindstack/include/unwindstack/UcontextArm64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_ARM64_H
-#define _LIBUNWINDSTACK_UCONTEXT_ARM64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -65,5 +64,3 @@ struct arm64_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_ARM64_H
diff --git a/libunwindstack/include/unwindstack/UcontextMips.h b/libunwindstack/include/unwindstack/UcontextMips.h
index 02e33b6..c75e469 100644
--- a/libunwindstack/include/unwindstack/UcontextMips.h
+++ b/libunwindstack/include/unwindstack/UcontextMips.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_MIPS_H
-#define _LIBUNWINDSTACK_UCONTEXT_MIPS_H
+#pragma once
 
 #include <stdint.h>
 
@@ -58,5 +57,3 @@ struct mips_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_MIPS_H
diff --git a/libunwindstack/include/unwindstack/UcontextMips64.h b/libunwindstack/include/unwindstack/UcontextMips64.h
index 5b92a55..c63218f 100644
--- a/libunwindstack/include/unwindstack/UcontextMips64.h
+++ b/libunwindstack/include/unwindstack/UcontextMips64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_MIPS64_H
-#define _LIBUNWINDSTACK_UCONTEXT_MIPS64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -65,5 +64,3 @@ struct mips64_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_MIPS64_H
diff --git a/libunwindstack/include/unwindstack/UcontextX86.h b/libunwindstack/include/unwindstack/UcontextX86.h
index c96ebb7..9dfdf2a 100644
--- a/libunwindstack/include/unwindstack/UcontextX86.h
+++ b/libunwindstack/include/unwindstack/UcontextX86.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_X86_H
-#define _LIBUNWINDSTACK_UCONTEXT_X86_H
+#pragma once
 
 #include <stdint.h>
 
@@ -73,5 +72,3 @@ struct x86_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_X86_H
diff --git a/libunwindstack/include/unwindstack/UcontextX86_64.h b/libunwindstack/include/unwindstack/UcontextX86_64.h
index 4e163e5..2801217 100644
--- a/libunwindstack/include/unwindstack/UcontextX86_64.h
+++ b/libunwindstack/include/unwindstack/UcontextX86_64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_UCONTEXT_X86_64_H
-#define _LIBUNWINDSTACK_UCONTEXT_X86_64_H
+#pragma once
 
 #include <stdint.h>
 
@@ -78,5 +77,3 @@ struct x86_64_ucontext_t {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UCONTEXT_X86_64_H
diff --git a/libunwindstack/include/unwindstack/Unwinder.h b/libunwindstack/include/unwindstack/Unwinder.h
index 462d39b..d78da5c 100644
--- a/libunwindstack/include/unwindstack/Unwinder.h
+++ b/libunwindstack/include/unwindstack/Unwinder.h
@@ -14,8 +14,7 @@
  * limitations under the License.
  */
 
-#ifndef _LIBUNWINDSTACK_UNWINDER_H
-#define _LIBUNWINDSTACK_UNWINDER_H
+#pragma once
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -197,5 +196,3 @@ class ThreadUnwinder : public UnwinderFromPid {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_UNWINDER_H
diff --git a/libunwindstack/include/unwindstack/UserArm.h b/libunwindstack/include/unwindstack/UserArm.h
index 7388c03..725a35b 100644
--- a/libunwindstack/include/unwindstack/UserArm.h
+++ b/libunwindstack/include/unwindstack/UserArm.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_ARM_H
-#define _LIBUNWINDSTACK_USER_ARM_H
+#pragma once
 
 namespace unwindstack {
 
@@ -36,5 +35,3 @@ struct arm_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_ARM_H
diff --git a/libunwindstack/include/unwindstack/UserArm64.h b/libunwindstack/include/unwindstack/UserArm64.h
index d74983f..0e16cd6 100644
--- a/libunwindstack/include/unwindstack/UserArm64.h
+++ b/libunwindstack/include/unwindstack/UserArm64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_ARM64_H
-#define _LIBUNWINDSTACK_USER_ARM64_H
+#pragma once
 
 namespace unwindstack {
 
@@ -39,5 +38,3 @@ struct arm64_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_ARM64_H
diff --git a/libunwindstack/include/unwindstack/UserMips.h b/libunwindstack/include/unwindstack/UserMips.h
index 184be4f..148ef93 100644
--- a/libunwindstack/include/unwindstack/UserMips.h
+++ b/libunwindstack/include/unwindstack/UserMips.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_MIPS_H
-#define _LIBUNWINDSTACK_USER_MIPS_H
+#pragma once
 
 namespace unwindstack {
 
@@ -41,5 +40,3 @@ struct mips_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_MIPS_H
diff --git a/libunwindstack/include/unwindstack/UserMips64.h b/libunwindstack/include/unwindstack/UserMips64.h
index c46befd..9844307 100644
--- a/libunwindstack/include/unwindstack/UserMips64.h
+++ b/libunwindstack/include/unwindstack/UserMips64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_MIPS64_H
-#define _LIBUNWINDSTACK_USER_MIPS64_H
+#pragma once
 
 namespace unwindstack {
 
@@ -41,5 +40,3 @@ struct mips64_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_MIPS64_H
diff --git a/libunwindstack/include/unwindstack/UserX86.h b/libunwindstack/include/unwindstack/UserX86.h
index a040560..9508010 100644
--- a/libunwindstack/include/unwindstack/UserX86.h
+++ b/libunwindstack/include/unwindstack/UserX86.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_X86_H
-#define _LIBUNWINDSTACK_USER_X86_H
+#pragma once
 
 namespace unwindstack {
 
@@ -52,5 +51,3 @@ struct x86_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_X86_H
diff --git a/libunwindstack/include/unwindstack/UserX86_64.h b/libunwindstack/include/unwindstack/UserX86_64.h
index b80d201..d7ff2e2 100644
--- a/libunwindstack/include/unwindstack/UserX86_64.h
+++ b/libunwindstack/include/unwindstack/UserX86_64.h
@@ -26,8 +26,7 @@
  * SUCH DAMAGE.
  */
 
-#ifndef _LIBUNWINDSTACK_USER_X86_64_H
-#define _LIBUNWINDSTACK_USER_X86_64_H
+#pragma once
 
 namespace unwindstack {
 
@@ -62,5 +61,3 @@ struct x86_64_user_regs {
 };
 
 }  // namespace unwindstack
-
-#endif  // _LIBUNWINDSTACK_USER_X86_64_H
-- 
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