330d8983d2
In a nutshell, this moves our libomptarget code to populate the offload subproject. With this commit, users need to enable the new LLVM/Offload subproject as a runtime in their cmake configuration. No further changes are expected for downstream code. Tests and other components still depend on OpenMP and have also not been renamed. The results below are for a build in which OpenMP and Offload are enabled runtimes. In addition to the pure `git mv`, we needed to adjust some CMake files. Nothing is intended to change semantics. ``` ninja check-offload ``` Works with the X86 and AMDGPU offload tests ``` ninja check-openmp ``` Still works but doesn't build offload tests anymore. ``` ls install/lib ``` Shows all expected libraries, incl. - `libomptarget.devicertl.a` - `libomptarget-nvptx-sm_90.bc` - `libomptarget.rtl.amdgpu.so` -> `libomptarget.rtl.amdgpu.so.18git` - `libomptarget.so` -> `libomptarget.so.18git` Fixes: https://github.com/llvm/llvm-project/issues/75124 --------- Co-authored-by: Saiyedul Islam <Saiyedul.Islam@amd.com>
76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
//===--- generic-elf-64bit/dynamic_ffi/ffi.cpp -------------------- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// Implement subset of the FFI api by calling into the FFI library via dlopen
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/DynamicLibrary.h"
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#include "Shared/Debug.h"
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#include <memory>
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#include "DLWrap.h"
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#include "ffi.h"
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DLWRAP_INITIALIZE()
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DLWRAP(ffi_call, 4);
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DLWRAP(ffi_prep_cif, 5);
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DLWRAP_FINALIZE()
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ffi_type ffi_type_void;
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ffi_type ffi_type_pointer;
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// Name of the FFI shared library.
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constexpr const char *FFI_PATH = "libffi.so";
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#define DYNAMIC_FFI_SUCCESS 0
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#define DYNAMIC_FFI_FAIL 1
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// Initializes the dynamic FFI wrapper.
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uint32_t ffi_init() {
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std::string ErrMsg;
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auto DynlibHandle = std::make_unique<llvm::sys::DynamicLibrary>(
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llvm::sys::DynamicLibrary::getPermanentLibrary(FFI_PATH, &ErrMsg));
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if (!DynlibHandle->isValid()) {
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DP("Unable to load library '%s': %s!\n", FFI_PATH, ErrMsg.c_str());
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return DYNAMIC_FFI_FAIL;
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}
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for (size_t I = 0; I < dlwrap::size(); I++) {
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const char *Sym = dlwrap::symbol(I);
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void *P = DynlibHandle->getAddressOfSymbol(Sym);
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if (P == nullptr) {
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DP("Unable to find '%s' in '%s'!\n", Sym, FFI_PATH);
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return DYNAMIC_FFI_FAIL;
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}
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DP("Implementing %s with dlsym(%s) -> %p\n", Sym, Sym, P);
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*dlwrap::pointer(I) = P;
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}
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#define DYNAMIC_INIT(SYMBOL) \
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{ \
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void *SymbolPtr = DynlibHandle->getAddressOfSymbol(#SYMBOL); \
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if (!SymbolPtr) { \
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DP("Unable to find '%s' in '%s'!\n", #SYMBOL, FFI_PATH); \
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return DYNAMIC_FFI_FAIL; \
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} \
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SYMBOL = *reinterpret_cast<decltype(SYMBOL) *>(SymbolPtr); \
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}
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DYNAMIC_INIT(ffi_type_void);
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DYNAMIC_INIT(ffi_type_pointer);
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#undef DYNAMIC_INIT
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return DYNAMIC_FFI_SUCCESS;
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}
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