[libc-commits] [llvm] [libunwind] [libc] [clang] [libunwind] Fix build for wasm (PR #79667)
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Fri Jan 26 19:40:41 PST 2024
https://github.com/trcrsired updated https://github.com/llvm/llvm-project/pull/79667
>From 1bd90e6a300dc8fd0b21a5a8dda2b40a41e6b128 Mon Sep 17 00:00:00 2001
From: trcrsired <uwgghhbcad at gmail.com>
Date: Fri, 26 Jan 2024 18:44:41 -0500
Subject: [PATCH 1/2] [libunwind] Fix build for wasm
The wasm unwind build appears to be dysfunctional, likely because the author has only supplied a customized LLVM build on request, rather than a fully functional patch.
This patch fixes the build
Apply formatting patch proposed by github bot
use "" to prevent CMAKE_SYSTEM_PROCESSOR not defined
---
libunwind/include/__libunwind_config.h | 1 +
libunwind/src/CMakeLists.txt | 53 +++++++++++++++-----------
libunwind/src/Unwind-wasm.c | 16 ++++----
libunwind/src/config.h | 15 ++++----
4 files changed, 47 insertions(+), 38 deletions(-)
diff --git a/libunwind/include/__libunwind_config.h b/libunwind/include/__libunwind_config.h
index 8db336b2d727ce..1cda20d7225500 100644
--- a/libunwind/include/__libunwind_config.h
+++ b/libunwind/include/__libunwind_config.h
@@ -180,6 +180,7 @@
#endif
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER \
_LIBUNWIND_HIGHEST_DWARF_REGISTER_LOONGARCH
+#elif defined(__wasm__)
# else
# error "Unsupported architecture."
# endif
diff --git a/libunwind/src/CMakeLists.txt b/libunwind/src/CMakeLists.txt
index 9c6f5d908b0945..b0838e2050f436 100644
--- a/libunwind/src/CMakeLists.txt
+++ b/libunwind/src/CMakeLists.txt
@@ -1,31 +1,38 @@
# Get sources
-set(LIBUNWIND_CXX_SOURCES
- libunwind.cpp
- Unwind-EHABI.cpp
- Unwind-seh.cpp
- )
+if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm32" OR
+ "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm64")
+ set(LIBUNWIND_C_SOURCES
+ Unwind-wasm.c
+ )
+else()
+ set(LIBUNWIND_CXX_SOURCES
+ libunwind.cpp
+ Unwind-EHABI.cpp
+ Unwind-seh.cpp
+ )
+
+ if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+ list(APPEND LIBUNWIND_CXX_SOURCES
+ Unwind_AIXExtras.cpp
+ )
+ endif()
-if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
- list(APPEND LIBUNWIND_CXX_SOURCES
- Unwind_AIXExtras.cpp
- )
-endif()
+ set(LIBUNWIND_C_SOURCES
+ UnwindLevel1.c
+ UnwindLevel1-gcc-ext.c
+ Unwind-sjlj.c
+ )
-set(LIBUNWIND_C_SOURCES
- UnwindLevel1.c
- UnwindLevel1-gcc-ext.c
- Unwind-sjlj.c
- Unwind-wasm.c
- )
-set_source_files_properties(${LIBUNWIND_C_SOURCES}
- PROPERTIES
- COMPILE_FLAGS "-std=c99")
+ set(LIBUNWIND_ASM_SOURCES
+ UnwindRegistersRestore.S
+ UnwindRegistersSave.S
+ )
-set(LIBUNWIND_ASM_SOURCES
- UnwindRegistersRestore.S
- UnwindRegistersSave.S
- )
+ set_source_files_properties(${LIBUNWIND_C_SOURCES}
+ PROPERTIES
+ COMPILE_FLAGS "-std=c99")
+endif()
set(LIBUNWIND_HEADERS
AddressSpace.hpp
diff --git a/libunwind/src/Unwind-wasm.c b/libunwind/src/Unwind-wasm.c
index f7f39d38b59c18..87be87e9fd92a8 100644
--- a/libunwind/src/Unwind-wasm.c
+++ b/libunwind/src/Unwind-wasm.c
@@ -10,14 +10,11 @@
//
//===----------------------------------------------------------------------===//
+#if __STDC_VERSION__ < 202311L
#include <stdbool.h>
-
+#endif
#include "config.h"
-
-#ifdef __USING_WASM_EXCEPTIONS__
-
#include "unwind.h"
-#include <threads.h>
_Unwind_Reason_Code __gxx_personality_wasm0(int version, _Unwind_Action actions,
uint64_t exceptionClass,
@@ -35,7 +32,12 @@ struct _Unwind_LandingPadContext {
// Communication channel between compiler-generated user code and personality
// function
-thread_local struct _Unwind_LandingPadContext __wasm_lpad_context;
+#if __STDC_VERSION__ >= 202311L
+thread_local
+#else
+_Thread_local
+#endif
+ struct _Unwind_LandingPadContext __wasm_lpad_context;
/// Calls to this function is in landing pads in compiler-generated user code.
/// In other EH schemes, stack unwinding is done by libunwind library, which
@@ -119,5 +121,3 @@ _LIBUNWIND_EXPORT uintptr_t
_Unwind_GetRegionStart(struct _Unwind_Context *context) {
return 0;
}
-
-#endif // defined(__USING_WASM_EXCEPTIONS__)
diff --git a/libunwind/src/config.h b/libunwind/src/config.h
index deb5a4d4d73d46..2a57df41acca9f 100644
--- a/libunwind/src/config.h
+++ b/libunwind/src/config.h
@@ -66,13 +66,14 @@
#define _LIBUNWIND_EXPORT
#define _LIBUNWIND_HIDDEN
#else
- #if !defined(__ELF__) && !defined(__MACH__) && !defined(_AIX)
- #define _LIBUNWIND_EXPORT __declspec(dllexport)
- #define _LIBUNWIND_HIDDEN
- #else
- #define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
- #define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
- #endif
+#if !defined(__ELF__) && !defined(__MACH__) && !defined(_AIX) && \
+ !defined(__wasm__)
+#define _LIBUNWIND_EXPORT __declspec(dllexport)
+#define _LIBUNWIND_HIDDEN
+#else
+#define _LIBUNWIND_EXPORT __attribute__((visibility("default")))
+#define _LIBUNWIND_HIDDEN __attribute__((visibility("hidden")))
+#endif
#endif
#define STR(a) #a
>From f15c3e43a18d8eaa30e3d5b978b011d6798a1095 Mon Sep 17 00:00:00 2001
From: trcrsired <uwgghhbcad at gmail.com>
Date: Fri, 26 Jan 2024 22:35:23 -0500
Subject: [PATCH 2/2] [libunwind] logAPI functions should also be built
---
libunwind/include/libunwind.h | 2 ++
libunwind/src/CMakeLists.txt | 3 +++
libunwind/src/libunwind.cpp | 2 ++
3 files changed, 7 insertions(+)
diff --git a/libunwind/include/libunwind.h b/libunwind/include/libunwind.h
index b2dae8feed9a3b..63e147ae2423e2 100644
--- a/libunwind/include/libunwind.h
+++ b/libunwind/include/libunwind.h
@@ -15,6 +15,7 @@
#include <__libunwind_config.h>
+#ifndef __wasm__
#include <stdint.h>
#include <stddef.h>
@@ -1299,5 +1300,6 @@ enum {
UNW_LOONGARCH_F30 = 62,
UNW_LOONGARCH_F31 = 63,
};
+#endif
#endif
diff --git a/libunwind/src/CMakeLists.txt b/libunwind/src/CMakeLists.txt
index b0838e2050f436..2b21f4400797ac 100644
--- a/libunwind/src/CMakeLists.txt
+++ b/libunwind/src/CMakeLists.txt
@@ -5,6 +5,9 @@ if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "wasm32" OR
set(LIBUNWIND_C_SOURCES
Unwind-wasm.c
)
+ set(LIBUNWIND_CXX_SOURCES
+ libunwind.cpp
+ )
else()
set(LIBUNWIND_CXX_SOURCES
libunwind.cpp
diff --git a/libunwind/src/libunwind.cpp b/libunwind/src/libunwind.cpp
index 217dde90986379..cd12570da1141a 100644
--- a/libunwind/src/libunwind.cpp
+++ b/libunwind/src/libunwind.cpp
@@ -12,6 +12,7 @@
#include <libunwind.h>
#include "config.h"
+#ifndef __wasm__
#include "libunwind_ext.h"
#include <stdlib.h>
@@ -431,6 +432,7 @@ int __unw_remove_find_dynamic_unwind_sections(
}
#endif // __APPLE__
+#endif
// Add logging hooks in Debug builds only
#ifndef NDEBUG
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