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Make the JIT code emitter properly retry and ask for more memory when it runs

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out of memory, and also make the default memory manager allocate more memory
when it runs out.

Also, switch function stubs and global data over to using the BumpPtrAllocator.

This makes it so the JIT no longer mmaps (or the equivalent on Windows) 16 MB
of memory, and instead allocates in 512K slabs.  I suspect this size could go
lower, especially on embedded platforms, now that more slabs can be allocated.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76828 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2009-07-23 00:49:59 +00:00
parent 95eb3ad353
commit 81ce3ed08c
8 changed files with 661 additions and 125 deletions
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7
lib/System/Unix/Memory.inc
View File

@@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "Unix.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/System/Process.h"
#ifdef HAVE_SYS_MMAN_H
@@ -28,12 +29,12 @@
/// is very OS specific.
///
llvm::sys::MemoryBlock
llvm::sys::Memory::AllocateRWX(unsigned NumBytes, const MemoryBlock* NearBlock,
llvm::sys::Memory::AllocateRWX(size_t NumBytes, const MemoryBlock* NearBlock,
std::string *ErrMsg) {
if (NumBytes == 0) return MemoryBlock();
unsigned pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
size_t pageSize = Process::GetPageSize();
size_t NumPages = (NumBytes+pageSize-1)/pageSize;
int fd = -1;
#ifdef NEED_DEV_ZERO_FOR_MMAP

7
lib/System/Win32/Memory.inc
View File

@@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "Win32.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/System/Process.h"
namespace llvm {
@@ -23,13 +24,13 @@ using namespace sys;
//=== and must not be UNIX code
//===----------------------------------------------------------------------===//
MemoryBlock Memory::AllocateRWX(unsigned NumBytes,
MemoryBlock Memory::AllocateRWX(size_t NumBytes,
const MemoryBlock *NearBlock,
std::string *ErrMsg) {
if (NumBytes == 0) return MemoryBlock();
static const long pageSize = Process::GetPageSize();
unsigned NumPages = (NumBytes+pageSize-1)/pageSize;
static const size_t pageSize = Process::GetPageSize();
size_t NumPages = (NumBytes+pageSize-1)/pageSize;
//FIXME: support NearBlock if ever needed on Win64.