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Simplify the sys::Memory interface per Chris' request.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16318 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2004-09-13 22:38:11 +00:00
parent 2565943289
commit 33189e787b
11 changed files with 114 additions and 94 deletions
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54
include/llvm/System/Memory.h
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@ -11,38 +11,48 @@
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SYSTEM_PATH_H
#define LLVM_SYSTEM_PATH_H
#include <string>
#ifndef LLVM_SYSTEM_MEMORY_H
#define LLVM_SYSTEM_MEMORY_H
namespace llvm {
namespace sys {
/// This class provides an abstraction for various memory handling functions
/// This class encapsulates the notion of a memory block which has an address
/// and a size. It is used by the Memory class (a friend) as the result of
/// various memory allocation operations.
/// @see Memory
/// @brief Memory block abstraction.
class MemoryBlock {
public:
void* base() const { return Address; }
unsigned size() const { return Size; }
private:
void * Address; ///< Address of first byte of memory area
unsigned Size; ///< Size, in bytes of the memory area
friend class Memory;
};
/// This class provides various memory handling functions that manipulate
/// MemoryBlock instances.
/// @since 1.4
/// @brief An abstraction for operating system paths.
/// @brief An abstraction for memory operations.
class Memory {
/// @name Functions
/// @{
public:
Memory() { Address = 0; AllocSize = 0; }
~Memory() { ReleaseRWX(*this); }
/// This method allocates a block of Read/Write/Execute memory that is
/// suitable for executing dynamically generated code (e.g. JIT). An
/// attempt to allocate \p NumBytes bytes of virtual memory is made.
/// @throws std::string if an error occurred.
/// @brief Allocate Read/Write/Execute memory.
static MemoryBlock AllocateRWX(unsigned NumBytes);
/// @throws std::string if an error occurred
static void* AllocateRWX(Memory& block, unsigned NumBytes);
/// @throws std::string if an error occurred
static void ReleaseRWX(Memory& block);
char* base() const { return reinterpret_cast<char*>(Address); }
unsigned size() const { return AllocSize; }
/// @}
/// @name Data
/// @{
private:
void * Address; // Address of first byte of memory area
unsigned AllocSize; // Size, in bytes of the memory area
/// This method releases a block of Read/Write/Execute memory that was
/// allocated with the AllocateRWX method. It should not be used to release
/// any memory block allocated any other way.
/// @throws std::string if an error occurred.
/// @brief Release Read/Write/Execute memory.
static void ReleaseRWX(MemoryBlock& block);
/// @}
};
}

4
lib/ExecutionEngine/JIT/JITEmitter.cpp
View File

@ -38,7 +38,7 @@ namespace {
/// are emitting is. This never bothers to release the memory, because when
/// we are ready to destroy the JIT, the program exits.
class JITMemoryManager {
sys::Memory MemBlock; // Virtual memory block allocated RWX
sys::MemoryBlock MemBlock; // Virtual memory block allocated RWX
unsigned char *MemBase; // Base of block of memory, start of stub mem
unsigned char *FunctionBase; // Start of the function body area
unsigned char *CurStubPtr, *CurFunctionPtr;
@ -53,7 +53,7 @@ namespace {
JITMemoryManager::JITMemoryManager() {
// Allocate a 16M block of memory...
sys::Memory::AllocateRWX(MemBlock,(16 << 20));
MemBlock = sys::Memory::AllocateRWX((16 << 20));
MemBase = reinterpret_cast<unsigned char*>(MemBlock.base());
FunctionBase = MemBase + 512*1024; // Use 512k for stubs

17
lib/System/AIX/Memory.cpp
View File

@ -26,8 +26,8 @@ using namespace sys;
//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -37,14 +37,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (pa == (void*)-1) {
throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
throw std::string("Can't release RWX Memory: ") + strerror(errno);
}
}

15
lib/System/Cygwin/Memory.cpp
View File

@ -26,8 +26,8 @@ using namespace sys;
//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -37,14 +37,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (pa == (void*)-1) {
throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
throw std::string("Can't release RWX Memory: ") + strerror(errno);
}
}

17
lib/System/Darwin/Memory.cpp
View File

@ -30,8 +30,8 @@ using namespace sys;
/// to emit code to the memory then jump to it. Getting this type of memory
/// is very OS specific.
///
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -43,14 +43,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
strerror_r(errno, msg, MAXPATHLEN-1);
throw std::string("Can't allocate RWX Memory: ") + msg;
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
char msg[MAXPATHLEN];
strerror_r(errno, msg, MAXPATHLEN-1);
throw std::string("Can't release RWX Memory: ") + msg;

16
lib/System/FreeBSD/Memory.cpp
View File

@ -25,8 +25,8 @@ using namespace sys;
//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -36,14 +36,16 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (pa == (void*)-1) {
throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
throw std::string("Can't release RWX Memory: ") + strerror(errno);
}
}

17
lib/System/Interix/Memory.cpp
View File

@ -25,8 +25,8 @@ using namespace sys;
//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -36,14 +36,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (pa == (void*)-1) {
throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
throw std::string("Can't release RWX Memory: ") + strerror(errno);
}
}

17
lib/System/Linux/Memory.cpp
View File

@ -30,8 +30,8 @@ using namespace sys;
/// to emit code to the memory then jump to it. Getting this type of memory
/// is very OS specific.
///
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -43,14 +43,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
strerror_r(errno, msg, MAXPATHLEN-1);
throw std::string("Can't allocate RWX Memory: ") + msg;
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.Size = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
char msg[MAXPATHLEN];
strerror_r(errno, msg, MAXPATHLEN-1);
throw std::string("Can't release RWX Memory: ") + msg;

17
lib/System/SunOS/Memory.cpp
View File

@ -26,8 +26,8 @@ using namespace sys;
//=== and must not be generic UNIX code (see ../Unix/Memory.cpp)
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -37,14 +37,15 @@ void* Memory::AllocateRWX(Memory& M, unsigned NumBytes) {
if (pa == (void*)-1) {
throw std::string("Can't allocate RWX Memory: ") + strerror(errno);
}
M.Address = pa;
M.AllocSize = NumPages*pageSize;
return pa;
MemoryBlock result;
result.Address = pa;
result.AllocSize = NumPages*pageSize;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 || M.AllocSize == 0) return;
if (0 != munmap(M.Address, M.AllocSize)) {
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
if (0 != munmap(M.Address, M.Size)) {
throw std::string("Can't release RWX Memory: ") + strerror(errno);
}
}

17
lib/System/Win32/Memory.cpp
View File

@ -22,8 +22,8 @@ using namespace sys;
//=== WARNING: Implementation here must contain only Win32 specific code.
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory&M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
unsigned pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -33,12 +33,13 @@ void* Memory::AllocateRWX(Memory&M, unsigned NumBytes) {
throw std::string("Couldn't allocate ") + utostr(NumBytes) +
" bytes of executable memory!";
}
M.Address = P;
M.AllocSize = NumBytes;
return P;
MemoryBlock result;
result.Address = P;
result.Size = NumBytes;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 ) return;
VirtualFree(M.Address, M.AllocSize, MEM_DECOMMIT, PAGE_NOACCESS);
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
VirtualFree(M.Address, M.Size, MEM_DECOMMIT, PAGE_NOACCESS);
}

17
lib/System/Win32/Memory.inc
View File

@ -22,8 +22,8 @@ using namespace sys;
//=== WARNING: Implementation here must contain only Win32 specific code.
//===----------------------------------------------------------------------===//
void* Memory::AllocateRWX(Memory&M, unsigned NumBytes) {
if (NumBytes == 0) return 0;
MemoryBlock Memory::AllocateRWX(unsigned NumBytes) {
if (NumBytes == 0) return MemoryBlock();
unsigned pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
@ -33,12 +33,13 @@ void* Memory::AllocateRWX(Memory&M, unsigned NumBytes) {
throw std::string("Couldn't allocate ") + utostr(NumBytes) +
" bytes of executable memory!";
}
M.Address = P;
M.AllocSize = NumBytes;
return P;
MemoryBlock result;
result.Address = P;
result.Size = NumBytes;
return result;
}
void Memory::ReleaseRWX(Memory& M) {
if (M.Address == 0 ) return;
VirtualFree(M.Address, M.AllocSize, MEM_DECOMMIT, PAGE_NOACCESS);
void Memory::ReleaseRWX(MemoryBlock& M) {
if (M.Address == 0 || M.Size == 0) return;
VirtualFree(M.Address, M.Size, MEM_DECOMMIT, PAGE_NOACCESS);
}