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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#if defined(__arm__)
#define PAGE_SIZE sysconf(_SC_PAGESIZE)
#define PAGE_MASK (~(PAGE_SIZE-1))
#endif
#ifdef BIT64
#define PRIA "016"
#else
#define PRIA "08"
#endif
enum MEMORY_REGION_FLAGS : uint32_t
{
// PF_X = 0x01, // Execute
// PF_W = 0x02, // Write
// PF_R = 0x04, // Read
MEMORY_REGION_FLAG_PERMISSIONS_MASK = 0x0f,
MEMORY_REGION_FLAG_SHARED = 0x10,
MEMORY_REGION_FLAG_PRIVATE = 0x20,
MEMORY_REGION_FLAG_MEMORY_BACKED = 0x40
};
struct MemoryRegion
{
private:
uint32_t m_flags;
uint64_t m_startAddress;
uint64_t m_endAddress;
uint64_t m_offset;
// The name used for NT_FILE output
const char* m_fileName;
public:
MemoryRegion(uint32_t flags, uint64_t start, uint64_t end) :
m_flags(flags),
m_startAddress(start),
m_endAddress(end),
m_offset(0),
m_fileName(nullptr)
{
assert((start & ~PAGE_MASK) == 0);
assert((end & ~PAGE_MASK) == 0);
}
MemoryRegion(uint32_t flags, uint64_t start, uint64_t end, uint64_t offset, const char* filename) :
m_flags(flags),
m_startAddress(start),
m_endAddress(end),
m_offset(offset),
m_fileName(filename)
{
assert((start & ~PAGE_MASK) == 0);
assert((end & ~PAGE_MASK) == 0);
}
// This is a special constructor for the module base address
// set where the start/end are not page aligned and "offset"
// is reused as the module base address.
MemoryRegion(uint32_t flags, uint64_t start, uint64_t end, uint64_t baseAddress) :
m_flags(flags),
m_startAddress(start),
m_endAddress(end),
m_offset(baseAddress),
m_fileName(nullptr)
{
}
// copy with new file name constructor
MemoryRegion(const MemoryRegion& region, const char* fileName) :
m_flags(region.m_flags),
m_startAddress(region.m_startAddress),
m_endAddress(region.m_endAddress),
m_offset(region.m_offset),
m_fileName(fileName)
{
}
// copy with new flags constructor. The file name is not copied.
MemoryRegion(const MemoryRegion& region, uint32_t flags) :
m_flags(flags),
m_startAddress(region.m_startAddress),
m_endAddress(region.m_endAddress),
m_offset(region.m_offset),
m_fileName(nullptr)
{
}
// copy constructor
MemoryRegion(const MemoryRegion& region) :
m_flags(region.m_flags),
m_startAddress(region.m_startAddress),
m_endAddress(region.m_endAddress),
m_offset(region.m_offset),
m_fileName(region.m_fileName)
{
}
const uint32_t Permissions() const { return m_flags & MEMORY_REGION_FLAG_PERMISSIONS_MASK; }
const uint32_t Flags() const { return m_flags; }
const bool IsBackedByMemory() const { return (m_flags & MEMORY_REGION_FLAG_MEMORY_BACKED) != 0; }
const uint64_t StartAddress() const { return m_startAddress; }
const uint64_t EndAddress() const { return m_endAddress; }
const uint64_t Size() const { return m_endAddress - m_startAddress; }
const uint64_t Offset() const { return m_offset; }
const char* FileName() const { return m_fileName; }
bool operator<(const MemoryRegion& rhs) const
{
return (m_startAddress < rhs.m_startAddress) && (m_endAddress <= rhs.m_startAddress);
}
// Returns true if "rhs" is wholly contained in this one
bool Contains(const MemoryRegion& rhs) const
{
return (m_startAddress <= rhs.m_startAddress) && (m_endAddress >= rhs.m_endAddress);
}
// Free the file name memory
void Cleanup()
{
if (m_fileName != nullptr)
{
free((void*)m_fileName);
m_fileName = nullptr;
}
}
void Trace() const
{
TRACE("%s%" PRIA PRIx64 " - %" PRIA PRIx64 " (%06" PRId64 ") %" PRIA PRIx64 " %02x %s\n", IsBackedByMemory() ? "*" : " ", m_startAddress, m_endAddress,
Size() / PAGE_SIZE, m_offset, m_flags, m_fileName != nullptr ? m_fileName : "");
}
};
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