mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-13 20:32:21 +00:00
Change AllocateRWX/DeallocateRWX to not throw an exception.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
parent
c1780d2a0a
commit
bed22d8902
@ -14,6 +14,8 @@
|
|||||||
#ifndef LLVM_SYSTEM_MEMORY_H
|
#ifndef LLVM_SYSTEM_MEMORY_H
|
||||||
#define LLVM_SYSTEM_MEMORY_H
|
#define LLVM_SYSTEM_MEMORY_H
|
||||||
|
|
||||||
|
#include <string>
|
||||||
|
|
||||||
namespace llvm {
|
namespace llvm {
|
||||||
namespace sys {
|
namespace sys {
|
||||||
|
|
||||||
@ -24,10 +26,10 @@ namespace sys {
|
|||||||
/// @brief Memory block abstraction.
|
/// @brief Memory block abstraction.
|
||||||
class MemoryBlock {
|
class MemoryBlock {
|
||||||
public:
|
public:
|
||||||
void* base() const { return Address; }
|
void *base() const { return Address; }
|
||||||
unsigned size() const { return Size; }
|
unsigned size() const { return Size; }
|
||||||
private:
|
private:
|
||||||
void * Address; ///< Address of first byte of memory area
|
void *Address; ///< Address of first byte of memory area
|
||||||
unsigned Size; ///< Size, in bytes of the memory area
|
unsigned Size; ///< Size, in bytes of the memory area
|
||||||
friend class Memory;
|
friend class Memory;
|
||||||
};
|
};
|
||||||
@ -45,21 +47,27 @@ namespace sys {
|
|||||||
/// attempt to allocate \p NumBytes bytes of virtual memory is made.
|
/// attempt to allocate \p NumBytes bytes of virtual memory is made.
|
||||||
/// \p NearBlock may point to an existing allocation in which case
|
/// \p NearBlock may point to an existing allocation in which case
|
||||||
/// an attempt is made to allocate more memory near the existing block.
|
/// an attempt is made to allocate more memory near the existing block.
|
||||||
/// @throws std::string if an error occurred.
|
///
|
||||||
|
/// On success, this returns a non-null memory block, otherwise it returns
|
||||||
|
/// a null memory block and fills in *ErrMsg.
|
||||||
|
///
|
||||||
/// @brief Allocate Read/Write/Execute memory.
|
/// @brief Allocate Read/Write/Execute memory.
|
||||||
static MemoryBlock AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock);
|
static MemoryBlock AllocateRWX(unsigned NumBytes,
|
||||||
|
const MemoryBlock *NearBlock,
|
||||||
|
std::string *ErrMsg = 0);
|
||||||
|
|
||||||
/// This method releases a block of Read/Write/Execute memory that was
|
/// This method releases a block of Read/Write/Execute memory that was
|
||||||
/// allocated with the AllocateRWX method. It should not be used to
|
/// allocated with the AllocateRWX method. It should not be used to
|
||||||
/// release any memory block allocated any other way.
|
/// release any memory block allocated any other way.
|
||||||
|
///
|
||||||
|
/// On success, this returns false, otherwise it returns true and fills
|
||||||
|
/// in *ErrMsg.
|
||||||
/// @throws std::string if an error occurred.
|
/// @throws std::string if an error occurred.
|
||||||
/// @brief Release Read/Write/Execute memory.
|
/// @brief Release Read/Write/Execute memory.
|
||||||
static void ReleaseRWX(MemoryBlock& block);
|
static bool ReleaseRWX(MemoryBlock &block, std::string *ErrMsg = 0);
|
||||||
|
|
||||||
/// @}
|
/// @}
|
||||||
};
|
};
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
#endif
|
#endif
|
||||||
|
@ -18,14 +18,14 @@
|
|||||||
#include <sys/mman.h>
|
#include <sys/mman.h>
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
namespace llvm {
|
|
||||||
|
|
||||||
/// AllocateRWXMemory - Allocate a slab of memory with read/write/execute
|
/// AllocateRWXMemory - Allocate a slab of memory with read/write/execute
|
||||||
/// permissions. This is typically used for JIT applications where we want
|
/// permissions. This is typically used for JIT applications where we want
|
||||||
/// to emit code to the memory then jump to it. Getting this type of memory
|
/// to emit code to the memory then jump to it. Getting this type of memory
|
||||||
/// is very OS specific.
|
/// is very OS specific.
|
||||||
///
|
///
|
||||||
MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock) {
|
llvm::sys::MemoryBlock
|
||||||
|
llvm::sys::Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock,
|
||||||
|
std::string *ErrMsg) {
|
||||||
if (NumBytes == 0) return MemoryBlock();
|
if (NumBytes == 0) return MemoryBlock();
|
||||||
|
|
||||||
long pageSize = Process::GetPageSize();
|
long pageSize = Process::GetPageSize();
|
||||||
@ -35,7 +35,8 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock)
|
|||||||
#ifdef NEED_DEV_ZERO_FOR_MMAP
|
#ifdef NEED_DEV_ZERO_FOR_MMAP
|
||||||
static int zero_fd = open("/dev/zero", O_RDWR);
|
static int zero_fd = open("/dev/zero", O_RDWR);
|
||||||
if (zero_fd == -1) {
|
if (zero_fd == -1) {
|
||||||
ThrowErrno("Can't open /dev/zero device");
|
GetErrno("Can't open /dev/zero device", ErrMsg);
|
||||||
|
return MemoryBlock();
|
||||||
}
|
}
|
||||||
fd = zero_fd;
|
fd = zero_fd;
|
||||||
#endif
|
#endif
|
||||||
@ -48,15 +49,17 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock)
|
|||||||
#endif
|
#endif
|
||||||
;
|
;
|
||||||
|
|
||||||
void* start = NearBlock ? (unsigned char*) NearBlock->base() + NearBlock->size() : 0;
|
void* start = NearBlock ? (unsigned char*)NearBlock->base() +
|
||||||
|
NearBlock->size() : 0;
|
||||||
|
|
||||||
void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
|
void *pa = ::mmap(start, pageSize*NumPages, PROT_READ|PROT_WRITE|PROT_EXEC,
|
||||||
flags, fd, 0);
|
flags, fd, 0);
|
||||||
if (pa == MAP_FAILED) {
|
if (pa == MAP_FAILED) {
|
||||||
if (NearBlock) //Try again without a near hint
|
if (NearBlock) //Try again without a near hint
|
||||||
return AllocateRWX(NumBytes, 0);
|
return AllocateRWX(NumBytes, 0);
|
||||||
else
|
|
||||||
ThrowErrno("Can't allocate RWX Memory");
|
GetErrno("Can't allocate RWX Memory", ErrMsg);
|
||||||
|
return MemoryBlock();
|
||||||
}
|
}
|
||||||
MemoryBlock result;
|
MemoryBlock result;
|
||||||
result.Address = pa;
|
result.Address = pa;
|
||||||
@ -64,12 +67,10 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock)
|
|||||||
return result;
|
return result;
|
||||||
}
|
}
|
||||||
|
|
||||||
void Memory::ReleaseRWX(MemoryBlock& M) {
|
bool llvm::sys::Memory::ReleaseRWX(MemoryBlock &M, std::string *ErrMsg) {
|
||||||
if (M.Address == 0 || M.Size == 0) return;
|
if (M.Address == 0 || M.Size == 0) return false;
|
||||||
if (0 != ::munmap(M.Address, M.Size)) {
|
if (0 != ::munmap(M.Address, M.Size))
|
||||||
ThrowErrno("Can't release RWX Memory");
|
return GetErrno("Can't release RWX Memory", ErrMsg);
|
||||||
}
|
return false;
|
||||||
}
|
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
@ -66,6 +66,35 @@
|
|||||||
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
|
# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
|
inline bool GetErrno(const std::string &prefix, std::string *ErrDest,
|
||||||
|
int errnum = -1) {
|
||||||
|
char buffer[MAXPATHLEN];
|
||||||
|
|
||||||
|
if (ErrDest == 0) return true;
|
||||||
|
|
||||||
|
buffer[0] = 0;
|
||||||
|
if (errnum == -1)
|
||||||
|
errnum = errno;
|
||||||
|
#ifdef HAVE_STRERROR_R
|
||||||
|
// strerror_r is thread-safe.
|
||||||
|
if (errnum)
|
||||||
|
strerror_r(errnum, buffer, MAXPATHLEN-1);
|
||||||
|
#elif HAVE_STRERROR
|
||||||
|
// Copy the thread un-safe result of strerror into
|
||||||
|
// the buffer as fast as possible to minimize impact
|
||||||
|
// of collision of strerror in multiple threads.
|
||||||
|
if (errnum)
|
||||||
|
strncpy(buffer, strerror(errnum), MAXPATHLEN-1);
|
||||||
|
buffer[MAXPATHLEN-1] = 0;
|
||||||
|
#else
|
||||||
|
// Strange that this system doesn't even have strerror
|
||||||
|
// but, oh well, just use a generic message
|
||||||
|
sprintf(buffer, "Error #%d", errnum);
|
||||||
|
#endif
|
||||||
|
*ErrDest = prefix + ": " + buffer;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
inline void ThrowErrno(const std::string& prefix, int errnum = -1) {
|
inline void ThrowErrno(const std::string& prefix, int errnum = -1) {
|
||||||
char buffer[MAXPATHLEN];
|
char buffer[MAXPATHLEN];
|
||||||
buffer[0] = 0;
|
buffer[0] = 0;
|
||||||
|
@ -23,7 +23,9 @@ using namespace sys;
|
|||||||
//=== and must not be UNIX code
|
//=== and must not be UNIX code
|
||||||
//===----------------------------------------------------------------------===//
|
//===----------------------------------------------------------------------===//
|
||||||
|
|
||||||
MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock) {
|
MemoryBlock Memory::AllocateRWX(unsigned NumBytes,
|
||||||
|
const MemoryBlock *NearBlock,
|
||||||
|
std::string *ErrMsg) {
|
||||||
if (NumBytes == 0) return MemoryBlock();
|
if (NumBytes == 0) return MemoryBlock();
|
||||||
|
|
||||||
static const long pageSize = Process::GetPageSize();
|
static const long pageSize = Process::GetPageSize();
|
||||||
@ -34,7 +36,8 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock)
|
|||||||
void *pa = VirtualAlloc(NULL, NumPages*pageSize, MEM_COMMIT,
|
void *pa = VirtualAlloc(NULL, NumPages*pageSize, MEM_COMMIT,
|
||||||
PAGE_EXECUTE_READWRITE);
|
PAGE_EXECUTE_READWRITE);
|
||||||
if (pa == NULL) {
|
if (pa == NULL) {
|
||||||
ThrowError("Can't allocate RWX Memory: ");
|
GetError("Can't allocate RWX Memory: ", ErrMsg);
|
||||||
|
return MemoryBlock();
|
||||||
}
|
}
|
||||||
|
|
||||||
MemoryBlock result;
|
MemoryBlock result;
|
||||||
@ -43,11 +46,10 @@ MemoryBlock Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock)
|
|||||||
return result;
|
return result;
|
||||||
}
|
}
|
||||||
|
|
||||||
void Memory::ReleaseRWX(MemoryBlock& M) {
|
bool Memory::ReleaseRWX(MemoryBlock &M, std::string *ErrMsg) {
|
||||||
if (M.Address == 0 || M.Size == 0) return;
|
if (M.Address == 0 || M.Size == 0) return;
|
||||||
if (!VirtualFree(M.Address, 0, MEM_RELEASE)) {
|
if (!VirtualFree(M.Address, 0, MEM_RELEASE))
|
||||||
ThrowError("Can't release RWX Memory: ");
|
return GetError("Can't release RWX Memory: ", ErrMsg);
|
||||||
}
|
|
||||||
}
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
Loading…
Reference in New Issue
Block a user