1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
//===- RemoteMemoryManager.h - LLI MCJIT recording memory manager ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This memory manager allocates local storage and keeps a record of each
// allocation. Iterators are provided for all data and code allocations.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
#define LLVM_TOOLS_LLI_REMOTEMEMORYMANAGER_H
#include "RemoteTarget.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Memory.h"
#include <utility>
namespace llvm {
class RemoteMemoryManager : public RTDyldMemoryManager {
public:
// Notice that this structure takes ownership of the memory allocated.
struct Allocation {
Allocation() {}
Allocation(sys::MemoryBlock mb, unsigned a, bool code)
: MB(mb), Alignment(a), IsCode(code) {}
sys::MemoryBlock MB;
unsigned Alignment;
bool IsCode;
};
private:
// This vector contains Allocation objects for all sections which we have
// allocated. This vector effectively owns the memory associated with the
// allocations.
SmallVector<Allocation, 2> AllocatedSections;
// This vector contains pointers to Allocation objects for any sections we
// have allocated locally but have not yet remapped for the remote target.
// When we receive notification of a completed module load, we will map
// these sections into the remote target.
SmallVector<Allocation, 2> UnmappedSections;
// This map tracks the sections we have remapped for the remote target
// but have not yet copied to the target.
DenseMap<uint64_t, Allocation> MappedSections;
// FIXME: This is part of a work around to keep sections near one another
// when MCJIT performs relocations after code emission but before
// the generated code is moved to the remote target.
sys::MemoryBlock Near;
sys::MemoryBlock allocateSection(uintptr_t Size);
RemoteTarget *Target;
public:
RemoteMemoryManager() : Target(nullptr) {}
virtual ~RemoteMemoryManager();
uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID,
StringRef SectionName) override;
uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
unsigned SectionID, StringRef SectionName,
bool IsReadOnly) override;
// For now, remote symbol resolution is not support in lli. The MCJIT
// interface does support this, but clients must provide their own
// mechanism for finding remote symbol addresses. MCJIT will resolve
// symbols from Modules it contains.
uint64_t getSymbolAddress(const std::string &Name) override { return 0; }
void notifyObjectLoaded(ExecutionEngine *EE, const ObjectImage *Obj) override;
bool finalizeMemory(std::string *ErrMsg) override;
// For now, remote EH frame registration isn't supported. Remote symbol
// resolution is a prerequisite to supporting remote EH frame registration.
void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
size_t Size) override {}
void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
size_t Size) override {}
// This is a non-interface function used by lli
void setRemoteTarget(RemoteTarget *T) { Target = T; }
};
} // end namespace llvm
#endif
|
