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Copy pathAlloc.c
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774 lines (656 loc) · 18 KB
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/* Alloc.c -- Memory allocation functions
: Igor Pavlov : Public domain */
#include "Precomp.h"
#ifdef _WIN32
#include "7zWindows.h"
#endif
#include <stdlib.h>
#include "Alloc.h"
#if defined(Z7_LARGE_PAGES) && defined(_WIN32) && \
(!defined(Z7_WIN32_WINNT_MIN) || Z7_WIN32_WINNT_MIN < 0x0502) // < Win2003 (xp-64)
#define Z7_USE_DYN_GetLargePageMinimum
#endif
// for debug:
#if 0
#if defined(__CHERI__) && defined(__SIZEOF_POINTER__) && (__SIZEOF_POINTER__ == 16)
// #pragma message("=== Z7_ALLOC_NO_OFFSET_ALLOCATOR === ")
#define Z7_ALLOC_NO_OFFSET_ALLOCATOR
#endif
#endif
// #define SZ_ALLOC_DEBUG
/* use SZ_ALLOC_DEBUG to debug alloc/free operations */
#ifdef SZ_ALLOC_DEBUG
#include <string.h>
#include <stdio.h>
static int g_allocCount = 0;
#ifdef _WIN32
static int g_allocCountMid = 0;
#ifdef Z7_LARGE_PAGES
static int g_allocCountBig = 0;
#endif
#endif
#define CONVERT_INT_TO_STR(charType, tempSize) \
char temp[tempSize]; unsigned i = 0; \
while (val >= 10) { temp[i++] = (char)('0' + (unsigned)(val % 10)); val /= 10; } \
*s++ = (charType)('0' + (unsigned)val); \
while (i != 0) { i--; *s++ = temp[i]; } \
*s = 0;
static void ConvertUInt64ToString(UInt64 val, char *s)
{
CONVERT_INT_TO_STR(char, 24)
}
#define GET_HEX_CHAR(t) ((char)(((t < 10) ? ('0' + t) : ('A' + (t - 10)))))
static void ConvertUInt64ToHex(UInt64 val, char *s)
{
UInt64 v = val;
unsigned i;
for (i = 1;; i++)
{
v >>= 4;
if (v == 0)
break;
}
s[i] = 0;
do
{
unsigned t = (unsigned)(val & 0xF);
val >>= 4;
s[--i] = GET_HEX_CHAR(t);
}
while (i);
}
#define DEBUG_OUT_STREAM stderr
static void Print(const char *s)
{
fputs(s, DEBUG_OUT_STREAM);
}
static void PrintAligned(const char *s, size_t align)
{
size_t len = strlen(s);
for(;;)
{
fputc(' ', DEBUG_OUT_STREAM);
if (len >= align)
break;
++len;
}
Print(s);
}
static void PrintLn(void)
{
Print("\n");
}
static void PrintHex(UInt64 v, size_t align)
{
char s[32];
ConvertUInt64ToHex(v, s);
PrintAligned(s, align);
}
static void PrintDec(int v, size_t align)
{
char s[32];
ConvertUInt64ToString((unsigned)v, s);
PrintAligned(s, align);
}
static void PrintAddr(void *p)
{
PrintHex((UInt64)(size_t)(ptrdiff_t)p, 12);
}
#define PRINT_REALLOC(name, cnt, size, ptr) { \
Print(name " "); \
if (!ptr) PrintDec(cnt++, 10); \
PrintHex(size, 10); \
PrintAddr(ptr); \
PrintLn(); }
#define PRINT_ALLOC(name, cnt, size, ptr) { \
Print(name " "); \
PrintDec(cnt++, 10); \
PrintHex(size, 10); \
PrintAddr(ptr); \
PrintLn(); }
#define PRINT_FREE(name, cnt, ptr) if (ptr) { \
Print(name " "); \
PrintDec(--cnt, 10); \
PrintAddr(ptr); \
PrintLn(); }
#else
#ifdef _WIN32
#ifdef Z7_LARGE_PAGES
#define PRINT_ALLOC(name, cnt, size, ptr)
#endif
#endif
#define PRINT_FREE(name, cnt, ptr)
#define Print(s)
#define PrintLn()
#ifndef Z7_ALLOC_NO_OFFSET_ALLOCATOR
#define PrintHex(v, align)
#endif
#define PrintAddr(p)
#endif
/*
by specification:
malloc(non_NULL, 0) : returns NULL or a unique pointer value that can later be successfully passed to free()
realloc(NULL, size) : the call is equivalent to malloc(size)
realloc(non_NULL, 0) : the call is equivalent to free(ptr)
in main compilers:
malloc(0) : returns non_NULL
realloc(NULL, 0) : returns non_NULL
realloc(non_NULL, 0) : returns NULL
*/
void *MyAlloc(size_t size)
{
if (size == 0)
return NULL;
// PRINT_ALLOC("Alloc ", g_allocCount, size, NULL)
#ifdef SZ_ALLOC_DEBUG
{
void *p = malloc(size);
if (p)
{
PRINT_ALLOC("Alloc ", g_allocCount, size, p)
}
return p;
}
#else
return malloc(size);
#endif
}
void MyFree(void *address)
{
PRINT_FREE("Free ", g_allocCount, address)
free(address);
}
void *MyRealloc(void *address, size_t size)
{
if (size == 0)
{
MyFree(address);
return NULL;
}
// PRINT_REALLOC("Realloc ", g_allocCount, size, address)
#ifdef SZ_ALLOC_DEBUG
{
void *p = realloc(address, size);
if (p)
{
PRINT_REALLOC("Realloc ", g_allocCount, size, address)
}
return p;
}
#else
return realloc(address, size);
#endif
}
#ifdef _WIN32
void *MidAlloc(size_t size)
{
if (size == 0)
return NULL;
#ifdef SZ_ALLOC_DEBUG
{
void *p = VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
if (p)
{
PRINT_ALLOC("Alloc-Mid", g_allocCountMid, size, p)
}
return p;
}
#else
return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
#endif
}
void MidFree(void *address)
{
PRINT_FREE("Free-Mid", g_allocCountMid, address)
if (!address)
return;
VirtualFree(address, 0, MEM_RELEASE);
}
#ifdef Z7_LARGE_PAGES
// #pragma message("Z7_LARGE_PAGES")
#ifdef MEM_LARGE_PAGES
#define MY_MEM_LARGE_PAGES MEM_LARGE_PAGES
#else
#define MY_MEM_LARGE_PAGES 0x20000000
#endif
extern
size_t g_LargePageSize;
size_t g_LargePageSize = 0;
extern
size_t g_LargePageThresholdMin;
size_t g_LargePageThresholdMin = 0;
extern
UInt32 g_LargePageFlags;
UInt32 g_LargePageFlags = 0;
void *BigAlloc(size_t size)
{
if (size == 0)
return NULL;
PRINT_ALLOC("Alloc-Big", g_allocCountBig, size, NULL)
#ifdef Z7_LARGE_PAGES
{
const size_t ps = g_LargePageSize - 1;
if (ps < (1u << 30) && size > g_LargePageThresholdMin)
{
const size_t size2 = (size + ps) & ~ps;
if (size2 >= size)
{
void *p = VirtualAlloc(NULL, size2, MEM_COMMIT | MY_MEM_LARGE_PAGES, PAGE_READWRITE);
if (p)
{
PRINT_ALLOC("Alloc-BM ", g_allocCountMid, size2, p)
return p;
}
if (g_LargePageFlags & Z7_LARGE_PAGES_FLAG_FAIL_STOP)
return p;
}
}
}
#endif
return MidAlloc(size);
}
void BigFree(void *address)
{
PRINT_FREE("Free-Big", g_allocCountBig, address)
MidFree(address);
}
#endif // Z7_LARGE_PAGES
#endif // _WIN32
static void *SzAlloc(ISzAllocPtr p, size_t size) { UNUSED_VAR(p) return MyAlloc(size); }
static void SzFree(ISzAllocPtr p, void *address) { UNUSED_VAR(p) MyFree(address); }
const ISzAlloc g_Alloc = { SzAlloc, SzFree };
#ifdef _WIN32
static void *SzMidAlloc(ISzAllocPtr p, size_t size) { UNUSED_VAR(p) return MidAlloc(size); }
static void SzMidFree(ISzAllocPtr p, void *address) { UNUSED_VAR(p) MidFree(address); }
const ISzAlloc g_MidAlloc = { SzMidAlloc, SzMidFree };
#endif
#if defined(Z7_LARGE_PAGES)
static void *SzBigAlloc(ISzAllocPtr p, size_t size) { UNUSED_VAR(p) return BigAlloc(size); }
static void SzBigFree(ISzAllocPtr p, void *address) { UNUSED_VAR(p) BigFree(address); }
const ISzAlloc g_BigAlloc = { SzBigAlloc, SzBigFree };
#endif
#ifndef Z7_ALLOC_NO_OFFSET_ALLOCATOR
#define ADJUST_ALLOC_SIZE 0
/*
#define ADJUST_ALLOC_SIZE (sizeof(void *) - 1)
*/
/*
Use (ADJUST_ALLOC_SIZE = (sizeof(void *) - 1)), if
MyAlloc() can return address that is NOT multiple of sizeof(void *).
*/
/*
uintptr_t : <stdint.h> C99 (optional)
: unsupported in VS6
*/
typedef
#ifdef _WIN32
UINT_PTR
#elif 1
uintptr_t
#else
ptrdiff_t
#endif
MY_uintptr_t;
#if 0 \
|| (defined(__CHERI__) \
|| defined(__SIZEOF_POINTER__) && (__SIZEOF_POINTER__ > 8))
// for 128-bit pointers (cheri):
#define MY_ALIGN_PTR_DOWN(p, align) \
((void *)((char *)(p) - ((size_t)(MY_uintptr_t)(p) & ((align) - 1))))
#else
#define MY_ALIGN_PTR_DOWN(p, align) \
((void *)((((MY_uintptr_t)(p)) & ~((MY_uintptr_t)(align) - 1))))
#endif
#endif
#ifndef _WIN32
#include <unistd.h> // for _POSIX_ADVISORY_INFO : for some linux
#if (defined(Z7_ALLOC_NO_OFFSET_ALLOCATOR) \
|| defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200112L) \
|| defined(_POSIX_ADVISORY_INFO) && (_POSIX_ADVISORY_INFO >= 200112L) \
|| defined(__APPLE__) \
/* || defined(__linux__) */)
#define USE_posix_memalign
// #pragma message("USE_posix_memalign")
#endif
#endif
#ifndef USE_posix_memalign
#define MY_ALIGN_PTR_UP_PLUS(p, align) MY_ALIGN_PTR_DOWN(((char *)(p) + (align) + ADJUST_ALLOC_SIZE), align)
#endif
/*
This posix_memalign() is for test purposes only.
We also need special Free() function instead of free(),
if this posix_memalign() is used.
*/
/*
static int posix_memalign(void **ptr, size_t align, size_t size)
{
size_t newSize = size + align;
void *p;
void *pAligned;
*ptr = NULL;
if (newSize < size)
return 12; // ENOMEM
p = MyAlloc(newSize);
if (!p)
return 12; // ENOMEM
pAligned = MY_ALIGN_PTR_UP_PLUS(p, align);
((void **)pAligned)[-1] = p;
*ptr = pAligned;
return 0;
}
*/
/*
ALLOC_ALIGN_SIZE >= sizeof(void *)
ALLOC_ALIGN_SIZE >= cache_line_size
*/
#define ALLOC_ALIGN_SIZE ((size_t)1 << 7)
void *z7_AlignedAlloc(size_t size)
{
#ifndef USE_posix_memalign
void *p;
void *pAligned;
size_t newSize;
/* also we can allocate additional dummy ALLOC_ALIGN_SIZE bytes after aligned
block to prevent cache line sharing with another allocated blocks */
newSize = size + ALLOC_ALIGN_SIZE * 1 + ADJUST_ALLOC_SIZE;
if (newSize < size)
return NULL;
p = MyAlloc(newSize);
if (!p)
return NULL;
pAligned = MY_ALIGN_PTR_UP_PLUS(p, ALLOC_ALIGN_SIZE);
Print(" size="); PrintHex(size, 8);
Print(" a_size="); PrintHex(newSize, 8);
Print(" ptr="); PrintAddr(p);
Print(" a_ptr="); PrintAddr(pAligned);
PrintLn();
((void **)pAligned)[-1] = p;
return pAligned;
#else
void *p;
if (posix_memalign(&p, ALLOC_ALIGN_SIZE, size))
return NULL;
Print(" posix_memalign="); PrintAddr(p);
PrintLn();
return p;
#endif
}
void z7_AlignedFree(void *address)
{
#ifndef USE_posix_memalign
if (address)
MyFree(((void **)address)[-1]);
#else
free(address);
#endif
}
static void *SzAlignedAlloc(ISzAllocPtr pp, size_t size)
{
UNUSED_VAR(pp)
return z7_AlignedAlloc(size);
}
static void SzAlignedFree(ISzAllocPtr pp, void *address)
{
UNUSED_VAR(pp)
#ifndef USE_posix_memalign
if (address)
MyFree(((void **)address)[-1]);
#else
free(address);
#endif
}
#ifndef _WIN32
#ifdef Z7_LARGE_PAGES
#if 0 // 1 for debug
#include <stdio.h>
#include <string.h> // for strerror()
#define PRF(x) x
#else
#define PRF(x)
#endif
#ifdef USE_posix_memalign
/* madvise():
glibc <= 2.19 : _BSD_SOURCE
glibc > 2.19 : _DEFAULT_SOURCE
*/
/* && (defined(_DEFAULT_SOURCE) || defined(_BSD_SOURCE)) */
#if 1 && !defined(Z7_NO_MADVISE) && \
(defined(__linux__) || defined(__unix__) || defined(__APPLE__))
#include <sys/mman.h> // for madvise
// #pragma message("sys/mman.h")
#if (defined(MADV_HUGEPAGE) && defined(MADV_NOHUGEPAGE))
#define Z7_USE_BIG_ALLOC_MADVISE
// #pragma message("Z7_USE_BIG_ALLOC_MADVISE")
#endif
#endif
#endif // USE_posix_memalign
#ifdef Z7_USE_BIG_ALLOC_MADVISE
#define LARGE_PAGE_SIZE_DEFAULT (1 << 21)
#else
#define LARGE_PAGE_SIZE_DEFAULT 0
#endif
extern
size_t g_LargePageSize;
size_t g_LargePageSize = LARGE_PAGE_SIZE_DEFAULT;
extern
size_t g_LargePageThresholdMin;
size_t g_LargePageThresholdMin = LARGE_PAGE_SIZE_DEFAULT / 2;
extern
UInt32 g_LargePageFlags;
UInt32 g_LargePageFlags = 0;
void *BigAlloc(size_t size)
{
if (size == 0)
return NULL;
#ifdef USE_posix_memalign
{
const size_t pageSize = g_LargePageSize;
void *buf = NULL; // on Linux (and other systems), posix_memalign() does not modify memptr on failure (POSIX.1-2008 TC2).
PRF(printf("\nBigAlloc 0x%08x=%5uMB", (unsigned)(size), (unsigned)(size >> 20));)
if (pageSize && size > g_LargePageThresholdMin)
{
int res;
const size_t mask = pageSize - 1;
/* we can allocate aligned size, so data at the end of buffer also will use huge page
if (size2 for madvise() is not aligned for huge page size)
{ Last data block will use small pages. It reduces memory allocation,
but last data block with small pages can work slower.
It's useful, if we have very large HUGE_PAGE: 32MB or 512MB. }
*/
size_t size2 = (size + mask) & ~mask;
if (size2 < size || (size & mask) <= g_LargePageThresholdMin)
size2 = size;
res = posix_memalign(&buf, pageSize, size2);
PRF(printf(" posix_memalign size=0x%08x=%5uMB align=%u",
(unsigned)(size2), (unsigned)(size2 >> 20), (unsigned)pageSize);)
PRF(printf(" buf=%p", (void *)buf);)
if (res == 0)
{
#ifdef Z7_USE_BIG_ALLOC_MADVISE
if ((g_LargePageFlags & Z7_LARGE_PAGES_FLAG_NO_MADVISE) == 0)
{
// Advise the kernel to use huge pages for this memory range
// MADV_HUGEPAGE / MADV_NOHUGEPAGE : since Linux 2.6.38
// madvise() only operates on whole pages, therefore addr must be page-aligned (4KB/8KB/16KB/64KB).
// The value of size is rounded up to a multiple of page size.
PRF(printf(" madvise g_LargePageFlags=%x", (unsigned)g_LargePageFlags);)
res = madvise(buf, size2, (g_LargePageFlags & Z7_LARGE_PAGES_FLAG_NO_HUGEPAGE) ? MADV_NOHUGEPAGE : MADV_HUGEPAGE);
if (res)
{
PRF(printf("\nERROR res=%d, errno=%d=%s\n", res, (int)errno, strerror(errno));)
if (g_LargePageFlags & Z7_LARGE_PAGES_FLAG_FAIL_STOP)
{
free(buf);
return NULL;
}
}
}
#endif // Z7_USE_BIG_ALLOC_MADVISE
PRF(printf("\n");)
return buf;
}
PRF(printf("\nERROR res=%d=%s\n", res, strerror(res));)
if (g_LargePageFlags & Z7_LARGE_PAGES_FLAG_FAIL_STOP)
return NULL;
// (res == ENOMEM) "Out of memory" is possible, if pageSize is too big.
// so we do second attempt with smaller alignment
}
}
#endif // !USE_posix_memalign
PRF(printf(" z7_AlignedAlloc size=0x%08x=%5uMB\n", (unsigned)(size), (unsigned)(size >> 20));)
return z7_AlignedAlloc(size);
}
void BigFree(void *address)
{
z7_AlignedFree(address);
}
#endif // Z7_LARGE_PAGES
#endif // !_WIN32
#ifdef Z7_LARGE_PAGES
void z7_LargePage_Set(UInt32 flags, size_t pageSize, size_t threshold)
{
g_LargePageFlags = flags;
#ifdef _WIN32
if ((flags & Z7_LARGE_PAGES_FLAG_USE_HUGEPAGE) == 0)
{
g_LargePageSize = 0;
g_LargePageThresholdMin = 0;
}
else
{
if ((flags & Z7_LARGE_PAGES_FLAG_DIRECT_PAGE_SIZE) == 0)
{
#ifdef Z7_USE_DYN_GetLargePageMinimum
Z7_DIAGNOSTIC_IGNORE_CAST_FUNCTION
typedef SIZE_T (WINAPI *Func_GetLargePageMinimum)(VOID);
const
Func_GetLargePageMinimum fn =
(Func_GetLargePageMinimum) Z7_CAST_FUNC_C GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),
"GetLargePageMinimum");
if (fn)
pageSize = fn();
else
pageSize = 0;
#else
pageSize = GetLargePageMinimum();
#endif
if (pageSize & (pageSize - 1))
pageSize = 0;
}
g_LargePageSize = pageSize;
if ((flags & Z7_LARGE_PAGES_FLAG_DIRECT_THRESHOLD) == 0)
threshold = pageSize / 2;
g_LargePageThresholdMin = threshold;
}
#else // !_WIN32
if (flags & Z7_LARGE_PAGES_FLAG_NO_PAGECODE)
{
g_LargePageSize = 0;
g_LargePageThresholdMin = 0;
}
else
{
if ((flags & Z7_LARGE_PAGES_FLAG_DIRECT_PAGE_SIZE) == 0)
pageSize = LARGE_PAGE_SIZE_DEFAULT;
g_LargePageSize = pageSize;
if ((flags & Z7_LARGE_PAGES_FLAG_DIRECT_THRESHOLD) == 0)
threshold = pageSize / 2;
g_LargePageThresholdMin = threshold;
}
// PRF(printf("\ng_LargePageSize=%x g_LargePageThresholdMin = %x g_LargePageFlags = %x", (unsigned)g_LargePageSize, (unsigned)g_LargePageThresholdMin, (unsigned)g_LargePageFlags);)
#endif // !_WIN32
}
#endif // Z7_LARGE_PAGES
const ISzAlloc g_AlignedAlloc = { SzAlignedAlloc, SzAlignedFree };
/* we align ptr to support cases where CAlignOffsetAlloc::offset is not multiply of sizeof(void *) */
#ifndef Z7_ALLOC_NO_OFFSET_ALLOCATOR
#if 1
#define MY_ALIGN_PTR_DOWN_1(p) MY_ALIGN_PTR_DOWN(p, sizeof(void *))
#define REAL_BLOCK_PTR_VAR(p) ((void **)MY_ALIGN_PTR_DOWN_1(p))[-1]
#else
// we can use this simplified code,
// if (CAlignOffsetAlloc::offset == (k * sizeof(void *))
#define REAL_BLOCK_PTR_VAR(p) (((void **)(p))[-1])
#endif
#endif
#if 0
#ifndef Z7_ALLOC_NO_OFFSET_ALLOCATOR
#include <stdio.h>
static void PrintPtr(const char *s, const void *p)
{
const Byte *p2 = (const Byte *)&p;
unsigned i;
printf("%s %p ", s, p);
for (i = sizeof(p); i != 0;)
{
i--;
printf("%02x", p2[i]);
}
printf("\n");
}
#endif
#endif
static void *AlignOffsetAlloc_Alloc(ISzAllocPtr pp, size_t size)
{
#if defined(Z7_ALLOC_NO_OFFSET_ALLOCATOR)
UNUSED_VAR(pp)
return z7_AlignedAlloc(size);
#else
const CAlignOffsetAlloc *p = Z7_CONTAINER_FROM_VTBL_CONST(pp, CAlignOffsetAlloc, vt);
void *adr;
void *pAligned;
size_t newSize;
size_t extra;
size_t alignSize = (size_t)1 << p->numAlignBits;
if (alignSize < sizeof(void *))
alignSize = sizeof(void *);
if (p->offset >= alignSize)
return NULL;
/* also we can allocate additional dummy ALLOC_ALIGN_SIZE bytes after aligned
block to prevent cache line sharing with another allocated blocks */
extra = p->offset & (sizeof(void *) - 1);
newSize = size + alignSize + extra + ADJUST_ALLOC_SIZE;
if (newSize < size)
return NULL;
adr = ISzAlloc_Alloc(p->baseAlloc, newSize);
if (!adr)
return NULL;
pAligned = (char *)MY_ALIGN_PTR_DOWN((char *)adr +
alignSize - p->offset + extra + ADJUST_ALLOC_SIZE, alignSize) + p->offset;
#if 0
printf("\nalignSize = %6x, offset=%6x, size=%8x \n", (unsigned)alignSize, (unsigned)p->offset, (unsigned)size);
PrintPtr("base", adr);
PrintPtr("alig", pAligned);
#endif
PrintLn();
Print("- Aligned: ");
Print(" size="); PrintHex(size, 8);
Print(" a_size="); PrintHex(newSize, 8);
Print(" ptr="); PrintAddr(adr);
Print(" a_ptr="); PrintAddr(pAligned);
PrintLn();
REAL_BLOCK_PTR_VAR(pAligned) = adr;
return pAligned;
#endif
}
static void AlignOffsetAlloc_Free(ISzAllocPtr pp, void *address)
{
#if defined(Z7_ALLOC_NO_OFFSET_ALLOCATOR)
UNUSED_VAR(pp)
z7_AlignedFree(address);
#else
if (address)
{
const CAlignOffsetAlloc *p = Z7_CONTAINER_FROM_VTBL_CONST(pp, CAlignOffsetAlloc, vt);
PrintLn();
Print("- Aligned Free: ");
PrintLn();
ISzAlloc_Free(p->baseAlloc, REAL_BLOCK_PTR_VAR(address));
}
#endif
}
void AlignOffsetAlloc_CreateVTable(CAlignOffsetAlloc *p)
{
p->vt.Alloc = AlignOffsetAlloc_Alloc;
p->vt.Free = AlignOffsetAlloc_Free;
}