| //===- Memory.cpp - Memory Handling Support ---------------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines some helpful functions for allocating memory and dealing |
| // with memory mapped files |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/Support/Memory.h" |
| #include "llvm/Support/Valgrind.h" |
| #include "llvm/Config/config.h" |
| |
| #if defined(__mips__) |
| #include <sys/cachectl.h> |
| #endif |
| |
| namespace llvm { |
| using namespace sys; |
| } |
| |
| // Include the platform-specific parts of this class. |
| #ifdef LLVM_ON_UNIX |
| #include "Unix/Memory.inc" |
| #endif |
| #ifdef LLVM_ON_WIN32 |
| #include "Windows/Memory.inc" |
| #endif |
| |
| extern "C" void sys_icache_invalidate(const void *Addr, size_t len); |
| |
| /// InvalidateInstructionCache - Before the JIT can run a block of code |
| /// that has been emitted it must invalidate the instruction cache on some |
| /// platforms. |
| void llvm::sys::Memory::InvalidateInstructionCache(const void *Addr, |
| size_t Len) { |
| |
| // icache invalidation for PPC and ARM. |
| #if defined(__APPLE__) |
| |
| # if (defined(__POWERPC__) || defined (__ppc__) || \ |
| defined(_POWER) || defined(_ARCH_PPC)) || defined(__arm__) |
| sys_icache_invalidate(Addr, Len); |
| # endif |
| |
| #else |
| |
| # if (defined(__POWERPC__) || defined (__ppc__) || \ |
| defined(_POWER) || defined(_ARCH_PPC)) && defined(__GNUC__) |
| const size_t LineSize = 32; |
| |
| const intptr_t Mask = ~(LineSize - 1); |
| const intptr_t StartLine = ((intptr_t) Addr) & Mask; |
| const intptr_t EndLine = ((intptr_t) Addr + Len + LineSize - 1) & Mask; |
| |
| for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize) |
| asm volatile("dcbf 0, %0" : : "r"(Line)); |
| asm volatile("sync"); |
| |
| for (intptr_t Line = StartLine; Line < EndLine; Line += LineSize) |
| asm volatile("icbi 0, %0" : : "r"(Line)); |
| asm volatile("isync"); |
| # elif defined(__arm__) && defined(__GNUC__) |
| // FIXME: Can we safely always call this for __GNUC__ everywhere? |
| char *Start = (char*) Addr; |
| char *End = Start + Len; |
| __builtin___clear_cache(Start, End); |
| # elif defined(__mips__) |
| cacheflush((char*)Addr, Len, BCACHE); |
| # endif |
| |
| #endif // end apple |
| |
| ValgrindDiscardTranslations(Addr, Len); |
| } |