forked from ned14/nedmalloc
/
nedmalloc.c
2275 lines (2201 loc) · 69.5 KB
/
nedmalloc.c
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/* Alternative malloc implementation for multiple threads without
lock contention based on dlmalloc. (C) 2005-2012 Niall Douglas
Boost Software License - Version 1.0 - August 17th, 2003
Permission is hereby granted, free of charge, to any person or organization
obtaining a copy of the software and accompanying documentation covered by
this license (the "Software") to use, reproduce, display, distribute,
execute, and transmit the Software, and to prepare derivative works of the
Software, and to permit third-parties to whom the Software is furnished to
do so, all subject to the following:
The copyright notices in the Software and this entire statement, including
the above license grant, this restriction and the following disclaimer,
must be included in all copies of the Software, in whole or in part, and
all derivative works of the Software, unless such copies or derivative
works are solely in the form of machine-executable object code generated by
a source language processor.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
*/
#if 0 /* Effectively makes nedmalloc = dlmalloc */
#define THREADCACHEMAX 0
#define DEFAULT_GRANULARITY 65536
#define DEFAULTMAXTHREADSINPOOL 1
#endif
#ifdef _MSC_VER
/* Enable full aliasing on MSVC */
/*#pragma optimize("a", on)*/
/*#pragma optimize("g", off)*/
#pragma warning(push)
#pragma warning(disable:4100) /* unreferenced formal parameter */
#pragma warning(disable:4127) /* conditional expression is constant */
#pragma warning(disable:4232) /* address of dllimport is not static, identity not guaranteed */
#pragma warning(disable:4706) /* assignment within conditional expression */
#define _CRT_SECURE_NO_WARNINGS 1 /* Don't care about MSVC warnings on POSIX functions */
#include <stdio.h>
#define fopen(f, m) _fsopen((f), (m), 0x40/*_SH_DENYNO*/) /* Have Windows let other programs view the log file as it is written */
#ifndef UNICODE
#define UNICODE /* Turn on windows unicode support */
#endif
#else
#include <stdio.h>
#endif
/*#define NEDMALLOC_DEBUG 1*/
/*#define ENABLE_LOGGING 7
#define NEDMALLOC_TESTLOGENTRY(tc, np, type, mspace, size, mem, alignment, flags, returned) (((type)&ENABLE_LOGGING)&&((size)>16*1024))
#define NEDMALLOC_STACKBACKTRACEDEPTH 16*/
/*#define NEDMALLOC_FORCERESERVE(p, mem, size) (((size)>=(256*1024)) ? M2_RESERVE_MULT(8) : 0)*/
/*#define WIN32_DIRECT_USE_FILE_MAPPINGS 0*/
/*#define NEDMALLOC_DEBUG 1*/
/*#define FULLSANITYCHECKS*/
/*#define FORCEINLINE*/
/* There is only support for the user mode page allocator on Windows at present */
#if !defined(ENABLE_USERMODEPAGEALLOCATOR)
#define ENABLE_USERMODEPAGEALLOCATOR 0
#endif
/* If link time code generation is on, don't force or prevent inlining */
#if defined(_MSC_VER) && defined(NEDMALLOC_DLL_EXPORTS)
#define FORCEINLINE
#define NOINLINE
#endif
#include "nedmalloc.h"
#include <errno.h>
#ifdef HAVE_VALGRIND
#include <valgrind/valgrind.h>
#include <valgrind/memcheck.h>
#endif
#if defined(WIN32)
#include <malloc.h>
#else
#if defined(__cplusplus)
extern "C"
#else
extern
#endif
#if defined(__linux__) || defined(__FreeBSD__)
/* Sadly we can't include <malloc.h> as it causes a redefinition error */
size_t malloc_usable_size(void *);
#elif defined(__APPLE__)
#if TARGET_OS_IPHONE
#include <malloc/malloc.h>
#else
#include <malloc.h>
#endif
#else
#error Do not know what to do here
#endif
#endif
#if USE_ALLOCATOR==1
#define MSPACES 1
#define ONLY_MSPACES 1
#endif
#define USE_DL_PREFIX 1
#define USE_RECURSIVE_LOCKS 1
#ifndef USE_LOCKS
#define USE_LOCKS 1
#endif
#define FOOTERS 1 /* Need to enable footers so frees lock the right mspace */
#define INSECURE 0 /* nedblkmstate works a lot better with magic enabled */
#ifndef NEDMALLOC_DEBUG
#if defined(DEBUG) || defined(_DEBUG)
#define NEDMALLOC_DEBUG 1
#else
#define NEDMALLOC_DEBUG 0
#endif
#endif
/* We need to consistently define DEBUG=0|1, _DEBUG and NDEBUG for dlmalloc */
#if !defined(DEBUG) && !defined(NDEBUG)
#ifdef __GNUC__
#warning DEBUG may not be defined but without NDEBUG being defined allocator will run with assert checking! Define NDEBUG to run at full speed.
#elif defined(_MSC_VER)
#pragma message(__FILE__ ": WARNING: DEBUG may not be defined but without NDEBUG being defined allocator will run with assert checking! Define NDEBUG to run at full speed.")
#endif
#endif
#undef DEBUG
#undef _DEBUG
#if NEDMALLOC_DEBUG
#define _DEBUG
#define DEBUG 1
#else
#define DEBUG 0
#endif
#ifdef NDEBUG /* Disable assert checking on release builds */
#undef DEBUG
#undef _DEBUG
#endif
/* The default of 64Kb means we spend too much time kernel-side */
#ifndef DEFAULT_GRANULARITY
#define DEFAULT_GRANULARITY (1*1024*1024)
#if DEBUG
#define DEFAULT_GRANULARITY_ALIGNED
#endif
#endif
/*#define USE_SPIN_LOCKS 0*/
#if ENABLE_USERMODEPAGEALLOCATOR
extern int OSHavePhysicalPageSupport(void);
extern void *userpage_malloc(size_t toallocate, unsigned flags);
extern int userpage_free(void *mem, size_t size);
extern void *userpage_realloc(void *mem, size_t oldsize, size_t newsize, int flags, unsigned flags2);
#define USERPAGE_TOPDOWN (M2_CUSTOM_FLAGS_BEGIN<<0)
#define USERPAGE_NOCOMMIT (M2_CUSTOM_FLAGS_BEGIN<<1)
/* This can provide a very significant speed boost */
#undef MMAP_CLEARS
#define MMAP_CLEARS 0
#define MUNMAP(h, a, s) (!OSHavePhysicalPageSupport() ? MUNMAP_DEFAULT((h), (a), (s)) : userpage_free((a), (s)))
#define MMAP(s, f) (!OSHavePhysicalPageSupport() ? MMAP_DEFAULT((s)) : userpage_malloc((s), (f)))
#define MREMAP(addr, osz, nsz, mv) (!OSHavePhysicalPageSupport() ? MREMAP_DEFAULT((addr), (osz), (nsz), (mv)) : userpage_realloc((addr), (osz), (nsz), (mv), 0))
#define DIRECT_MMAP(h, s, f) (!OSHavePhysicalPageSupport() ? DIRECT_MMAP_DEFAULT((h), (s), (f)) : userpage_malloc((s), (f)|USERPAGE_TOPDOWN))
#define DIRECT_MREMAP(h, a, os, ns, f, f2) (!OSHavePhysicalPageSupport() ? DIRECT_MREMAP_DEFAULT((h), (a), (os), (ns), (f), (f2)) : userpage_realloc((a), (os), (ns), (f), (f2)|USERPAGE_TOPDOWN))
/*#undef MREMAP
#define MREMAP(addr, osz, nsz, mv) (!OSHavePhysicalPageSupport() ? MREMAP_DEFAULT((addr), (osz), (nsz), (mv)) : MFAIL)*/
/*#undef DIRECT_MREMAP
#define DIRECT_MREMAP(h, a, os, ns, f, f2) (!OSHavePhysicalPageSupport() ? DIRECT_MREMAP_DEFAULT((h), (a), (os), (ns), (f), (f2)) : MFAIL)*/
#endif
#include "malloc.c.h"
#ifdef NDEBUG /* Disable assert checking on release builds */
#undef DEBUG
#endif
/* The default number of threads allowed into a pool at once */
#ifndef DEFAULTMAXTHREADSINPOOL
#define DEFAULTMAXTHREADSINPOOL 4
#endif
/* The maximum size to be allocated from the thread cache */
#ifndef THREADCACHEMAX
#define THREADCACHEMAX 8192
#elif THREADCACHEMAX && !defined(THREADCACHEMAXBINS)
#ifdef __GNUC__
#warning If you are changing THREADCACHEMAX, do you also need to change THREADCACHEMAXBINS=(topbitpos(THREADCACHEMAX)-4)?
#elif defined(_MSC_VER)
#pragma message(__FILE__ ": WARNING: If you are changing THREADCACHEMAX, do you also need to change THREADCACHEMAXBINS=(topbitpos(THREADCACHEMAX)-4)?")
#endif
#endif
/* The maximum concurrent threads in a pool possible */
#ifndef MAXTHREADSINPOOL
#define MAXTHREADSINPOOL 16
#endif
/* The maximum number of threadcaches which can be allocated */
#ifndef THREADCACHEMAXCACHES
#define THREADCACHEMAXCACHES 256
#endif
#ifndef THREADCACHEMAXBINS
#if 0
/* The number of cache entries for finer grained bins. This is (topbitpos(THREADCACHEMAX)-4)*2 */
#define THREADCACHEMAXBINS ((13-4)*2)
#else
/* The number of cache entries. This is (topbitpos(THREADCACHEMAX)-4) */
#define THREADCACHEMAXBINS (13-4)
#endif
#endif
/* Point at which the free space in a thread cache is garbage collected */
#ifndef THREADCACHEMAXFREESPACE
#define THREADCACHEMAXFREESPACE (1024*1024)
#endif
/* NEDMALLOC_FORCERESERVE is used to force malloc2 flags for normal malloc, calloc et al */
#ifndef NEDMALLOC_FORCERESERVE
#define NEDMALLOC_FORCERESERVE(p, mem, size) 0
#endif
/* ENABLE_LOGGING is a bitmask of what events to log */
#if ENABLE_LOGGING
#ifndef NEDMALLOC_LOGFILE
#define NEDMALLOC_LOGFILE "nedmalloc.csv"
#endif
#endif
/* NEDMALLOC_TESTLOGENTRY returns non-zero if the entry should be logged */
#ifndef NEDMALLOC_TESTLOGENTRY
#define NEDMALLOC_TESTLOGENTRY(tc, np, type, mspace, size, mem, alignment, flags, returned) ((type)&ENABLE_LOGGING)
#endif
/* NEDMALLOC_STACKBACKTRACEDEPTH has the logger store a stack backtrace per logged item. Slow! */
#ifndef NEDMALLOC_STACKBACKTRACEDEPTH
#define NEDMALLOC_STACKBACKTRACEDEPTH 0
#endif
#if NEDMALLOC_STACKBACKTRACEDEPTH
#include "Dbghelp.h"
#include "psapi.h"
#pragma comment(lib, "dbghelp.lib")
#pragma comment(lib, "psapi.lib")
#endif
#define NM_FLAGS_MASK (M2_FLAGS_MASK&~M2_ZERO_MEMORY)
#if USE_LOCKS
#ifdef WIN32
#define TLSVAR DWORD
#define TLSALLOC(k) (*(k)=TlsAlloc(), TLS_OUT_OF_INDEXES==*(k))
#define TLSFREE(k) (!TlsFree(k))
#define TLSGET(k) TlsGetValue(k)
#define TLSSET(k, a) (!TlsSetValue(k, a))
#ifdef DEBUG
static LPVOID ChkedTlsGetValue(DWORD idx)
{
LPVOID ret=TlsGetValue(idx);
assert(S_OK==GetLastError());
return ret;
}
#undef TLSGET
#define TLSGET(k) ChkedTlsGetValue(k)
#endif
#else
#define TLSVAR pthread_key_t
#define TLSALLOC(k) pthread_key_create(k, 0)
#define TLSFREE(k) pthread_key_delete(k)
#define TLSGET(k) pthread_getspecific(k)
#define TLSSET(k, a) pthread_setspecific(k, a)
#endif
#else /* Probably if you're not using locks then you don't want ANY pthread stuff at all */
#define TLSVAR void *
#define TLSALLOC(k) (*k=0)
#define TLSFREE(k) (k=0)
#define TLSGET(k) k
#define TLSSET(k, a) (k=a, 0)
#endif
#if ENABLE_USERMODEPAGEALLOCATOR
#include "usermodepageallocator.c"
#endif
#if defined(__cplusplus)
#if !defined(NO_NED_NAMESPACE)
namespace nedalloc {
#else
extern "C" {
#endif
#endif
#if USE_ALLOCATOR==0
static void *unsupported_operation(const char *opname) THROWSPEC
{
fprintf(stderr, "nedmalloc: The operation %s is not supported under this build configuration\n", opname);
abort();
return 0;
}
static size_t mspacecounter=(size_t) 0xdeadbeef;
#endif
#ifndef ENABLE_FAST_HEAP_DETECTION
static void *RESTRICT leastusedaddress;
static size_t largestusedblock;
#endif
/* Used to redirect system allocator ops if needed */
extern void *(*sysmalloc)(size_t);
extern void *(*syscalloc)(size_t, size_t);
extern void *(*sysrealloc)(void *, size_t);
extern void (*sysfree)(void *);
extern size_t (*sysblksize)(void *);
#if !defined(REPLACE_SYSTEM_ALLOCATOR) || (!defined(_MSC_VER) && !defined(__MINGW32__))
void *(*sysmalloc)(size_t)=malloc;
void *(*syscalloc)(size_t, size_t)=calloc;
void *(*sysrealloc)(void *, size_t)=realloc;
void (*sysfree)(void *)=free;
size_t (*sysblksize)(void *)=
#if defined(_MSC_VER) || defined(__MINGW32__)
/* This is the MSVCRT equivalent */
_msize;
#elif defined(__linux__) || defined(__FreeBSD__)
/* This is the glibc/ptmalloc2/dlmalloc/BSD equivalent. */
malloc_usable_size;
#elif defined(__APPLE__)
/* This is the Apple BSD libc equivalent. */
(size_t (*)(void *)) malloc_size;
#else
#error Cannot tolerate the memory allocator of an unknown system!
#endif
#else
/* Remove the MSVCRT dependency on the memory functions */
void *(*sysmalloc)(size_t);
void *(*syscalloc)(size_t, size_t);
void *(*sysrealloc)(void *, size_t);
void (*sysfree)(void *);
size_t (*sysblksize)(void *);
#endif
static FORCEINLINE NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void *CallMalloc(void *RESTRICT mspace, size_t size, size_t alignment, unsigned flags) THROWSPEC
{
void *RESTRICT ret=0;
#if USE_MAGIC_HEADERS
size_t _alignment=alignment;
size_t *_ret=0;
size_t bytes=size+alignment+3*sizeof(size_t);
/* Avoid addition overflow. */
if(bytes<size)
return 0;
size=bytes;
_alignment=0;
#endif
#if USE_ALLOCATOR==0
ret=(flags & M2_ZERO_MEMORY) ? syscalloc(1, size) : sysmalloc(size); /* magic headers takes care of alignment */
#elif USE_ALLOCATOR==1
ret=mspace_malloc2((mstate) mspace, size, alignment, flags);
#ifdef HAVE_VALGRIND
if(ret) VALGRIND_MEMPOOL_ALLOC(mspace, ret, size);
#endif
#ifndef ENABLE_FAST_HEAP_DETECTION
if(ret)
{
mchunkptr p=mem2chunk(ret);
size_t truesize=chunksize(p) - overhead_for(p);
if(!leastusedaddress || (void *)((mstate) mspace)->least_addr<leastusedaddress) leastusedaddress=(void *)((mstate) mspace)->least_addr;
if(!largestusedblock || truesize>largestusedblock) largestusedblock=(truesize+mparams.page_size) & ~(mparams.page_size-1);
}
#endif
#endif
if(!ret) return 0;
#if DEBUG
if(flags & M2_ZERO_MEMORY)
{
const char *RESTRICT n;
for(n=(const char *)ret; n<(const char *)ret+size; n++)
{
assert(!*n);
}
}
#endif
#if USE_MAGIC_HEADERS
_ret=(size_t *) ret;
ret=(void *)(_ret+3);
if(alignment) ret=(void *)(((size_t) ret+alignment-1)&~(alignment-1));
for(; _ret<(size_t *)ret-2; _ret++) *_ret=*(size_t *)"NEDMALOC";
_ret[0]=(size_t) mspace;
_ret[1]=size-3*sizeof(size_t);
#endif
return ret;
}
static FORCEINLINE NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void *CallRealloc(void *RESTRICT mspace, void *RESTRICT mem, int isforeign, size_t oldsize, size_t newsize, size_t alignment, unsigned flags) THROWSPEC
{
void *RESTRICT ret=0;
#if USE_MAGIC_HEADERS
mstate oldmspace=0;
size_t *_ret=0, *_mem=(size_t *) mem-3;
#endif
if(isforeign)
{ /* Transfer */
#if USE_MAGIC_HEADERS
assert(_mem[0]!=*(size_t *) "NEDMALOC");
#endif
if((ret=CallMalloc(mspace, newsize, alignment, flags)))
{
#if defined(DEBUG)
printf("*** nedmalloc frees system allocated block %p\n", mem);
#endif
memcpy(ret, mem, oldsize<newsize ? oldsize : newsize);
sysfree(mem);
}
return ret;
}
#if USE_MAGIC_HEADERS
assert(_mem[0]==*(size_t *) "NEDMALOC");
newsize+=3*sizeof(size_t);
oldmspace=(mstate) _mem[1];
assert(oldsize>=_mem[2]);
for(; *_mem==*(size_t *) "NEDMALOC"; *_mem--=*(size_t *) "nedmaloc");
mem=(void *)(++_mem);
#endif
#if USE_ALLOCATOR==0
ret=sysrealloc(mem, newsize);
#elif USE_ALLOCATOR==1
ret=mspace_realloc2((mstate) mspace, mem, newsize, alignment, flags);
#ifdef HAVE_VALGRIND
if(ret) VALGRIND_MEMPOOL_CHANGE(mspace, mem, ret, newsize);
#endif
#ifndef ENABLE_FAST_HEAP_DETECTION
if(ret)
{
mchunkptr p=mem2chunk(ret);
size_t truesize=chunksize(p) - overhead_for(p);
if(!leastusedaddress || (void *)((mstate) mspace)->least_addr<leastusedaddress) leastusedaddress=(void *)((mstate) mspace)->least_addr;
if(!largestusedblock || truesize>largestusedblock) largestusedblock=(truesize+mparams.page_size) & ~(mparams.page_size-1);
}
#endif
#endif
if(!ret)
{ /* Put it back the way it was */
#if USE_MAGIC_HEADERS
for(; *_mem==0; *_mem++=*(size_t *) "NEDMALOC");
#endif
return 0;
}
#if USE_MAGIC_HEADERS
_ret=(size_t *) ret;
ret=(void *)(_ret+3);
for(; _ret<(size_t *)ret-2; _ret++) *_ret=*(size_t *) "NEDMALOC";
_ret[0]=(size_t) mspace;
_ret[1]=newsize-3*sizeof(size_t);
#endif
return ret;
}
static FORCEINLINE void CallFree(void *RESTRICT mspace, void *RESTRICT mem, int isforeign) THROWSPEC
{
#if USE_MAGIC_HEADERS
mstate oldmspace=0;
size_t *_mem=(size_t *) mem-3, oldsize=0;
#endif
if(isforeign)
{
#if USE_MAGIC_HEADERS
assert(_mem[0]!=*(size_t *) "NEDMALOC");
#endif
#if defined(DEBUG)
printf("*** nedmalloc frees system allocated block %p\n", mem);
#endif
sysfree(mem);
return;
}
#if USE_MAGIC_HEADERS
assert(_mem[0]==*(size_t *) "NEDMALOC");
oldmspace=(mstate) _mem[1];
oldsize=_mem[2];
for(; *_mem==*(size_t *) "NEDMALOC"; *_mem--=*(size_t *) "nedmaloc");
mem=(void *)(++_mem);
#endif
#if USE_ALLOCATOR==0
sysfree(mem);
#elif USE_ALLOCATOR==1
#ifdef HAVE_VALGRIND
{
void *m=mspace ? mspace : get_mstate_for(mem2chunk(mem));
mspace_free((mstate) mspace, mem);
VALGRIND_MEMPOOL_FREE(m, mem);
/* Mark the first two pointers in the newly freed block as used (linked list of freed blocks) */
VALGRIND_MAKE_MEM_DEFINED(mem, 2*sizeof(void *));
}
#else
mspace_free((mstate) mspace, mem);
#endif
#endif
}
static NEDMALLOCNOALIASATTR mstate nedblkmstate(void *RESTRICT mem) THROWSPEC
{
if(mem)
{
#if USE_MAGIC_HEADERS
size_t *_mem=(size_t *) mem-3;
if(_mem[0]==*(size_t *) "NEDMALOC")
{
return (mstate) _mem[1];
}
else return 0;
#else
#if USE_ALLOCATOR==0
/* Fail everything */
return 0;
#elif USE_ALLOCATOR==1
#ifdef ENABLE_FAST_HEAP_DETECTION
#ifdef WIN32
/* On Windows for RELEASE both x86 and x64 the NT heap precedes each block with an eight byte header
which looks like:
normal: 4 bytes of size, 4 bytes of [char < 64, char < 64, char < 64 bit 0 always set, char random ]
mmaped: 4 bytes of size 4 bytes of [zero, zero, 0xb, zero ]
On Windows for DEBUG both x86 and x64 the preceding four bytes is always 0xfdfdfdfd (no man's land).
*/
#pragma pack(push, 1)
struct _HEAP_ENTRY
{
USHORT Size;
USHORT PreviousSize;
UCHAR Cookie; /* SegmentIndex */
UCHAR Flags; /* always bit 0 (HEAP_ENTRY_BUSY). bit 1=(HEAP_ENTRY_EXTRA_PRESENT), bit 2=normal block (HEAP_ENTRY_FILL_PATTERN), bit 3=mmap block (HEAP_ENTRY_VIRTUAL_ALLOC). Bit 4 (HEAP_ENTRY_LAST_ENTRY) could be set */
UCHAR UnusedBytes;
UCHAR SmallTagIndex; /* fastbin index. Always one of 0x02, 0x03, 0x04 < 0x80 */
} *RESTRICT he=((struct _HEAP_ENTRY *) mem)-1;
#pragma pack(pop)
unsigned int header=((unsigned int *)mem)[-1], mask1=0x8080E100, result1, mask2=0xFFFFFF06, result2;
result1=header & mask1; /* Positive testing for NT heap */
result2=header & mask2; /* Positive testing for dlmalloc */
if(result1==0x00000100 && result2!=0x00000102)
{ /* This is likely a NT heap block */
return 0;
}
#endif
#ifdef __linux__
/* On Linux glibc uses ptmalloc2 (really dlmalloc) just as we do, but prev_foot contains rubbish
when the preceding block is allocated because ptmalloc2 finds the local mstate by rounding the ptr
down to the nearest megabyte. It's like dlmalloc with FOOTERS disabled. */
mchunkptr p=mem2chunk(mem);
mstate fm=get_mstate_for(p);
/* If it's a ptmalloc2 block, fm is likely to be some crazy value */
if(!is_aligned(fm)) return 0;
if((size_t)mem-(size_t)fm>=(size_t)1<<(SIZE_T_BITSIZE-1)) return 0;
if(ok_magic(fm))
return fm;
else
return 0;
if(1) { }
#endif
else
{
mchunkptr p=mem2chunk(mem);
mstate fm=get_mstate_for(p);
assert(ok_magic(fm)); /* If this fails, someone tried to free a block twice */
if(ok_magic(fm))
return fm;
}
#else /* ENABLE_FAST_HEAP_DETECTION */
#ifdef WIN32
#ifdef _MSC_VER
__try
#else
#if ENABLE_TOLERANT_NEDMALLOC
#error Lack of SEH support makes nedmalloc unreliable with foreign memory blocks. Make sure ENABLE_TOLERANT_NEDMALLOC is turned off!
#endif
#endif /* defined(_MSC_VER) */
#elif ENABLE_TOLERANT_NEDMALLOC
#warning nedmalloc is unreliable with foreign memory blocks, so make sure you really want ENABLE_TOLERANT_NEDMALLOC turned on!
#endif
{
/* We try to return zero here if it isn't one of our own blocks, however
the current block annotation scheme used by dlmalloc makes it impossible
to be absolutely sure of avoiding a segfault.
mchunkptr->prev_foot = mem-(2*size_t) = mstate ^ mparams.magic for PRECEDING block;
mchunkptr->head = mem-(1*size_t) = 8 multiple size of this block with bottom three bits = FLAG_BITS
FLAG_BITS = bit 0 is CINUSE (currently in use unless is mmap), bit 1 is PINUSE (previous block currently
in use unless mmap), bit 2 is UNUSED and currently is always zero.
*/
register void *RESTRICT leastusedaddress_=leastusedaddress; /* Cache these to avoid register reloading */
register size_t largestusedblock_=largestusedblock;
if(!is_aligned(mem)) return 0; /* Would fail very rarely as all allocators return aligned blocks */
if(mem<leastusedaddress_) return 0; /* Simple but effective */
{
mchunkptr p=mem2chunk(mem);
mstate fm=0;
int ismmapped=is_mmapped(p);
if((!ismmapped && !is_inuse(p)) || (p->head & FLAG4_BIT)) return 0;
/* Reduced uncertainty by 0.5^2 = 25.0% */
/* size should never exceed largestusedblock */
if(chunksize(p)-overhead_for(p)>largestusedblock_) return 0;
/* Reduced uncertainty by a minimum of 0.5^3 = 12.5%, maximum 0.5^16 = 0.0015% */
/* Having sanity checked prev_foot and head, check next block */
if(!ismmapped && (!next_pinuse(p) || (next_chunk(p)->head & FLAG4_BIT))) return 0;
/* Reduced uncertainty by 0.5^5 = 3.13% or 0.5^18 = 0.00038% */
#if 0
/* If previous block is free, check that its next block pointer equals us */
if(!ismmapped && !pinuse(p))
if(next_chunk(prev_chunk(p))!=p) return 0;
/* We could start comparing prev_foot's for similarity but it starts getting slow. */
#endif
fm = get_mstate_for(p);
if(!is_aligned(fm) || (void *)fm<leastusedaddress_) return 0;
#if 0
/* See if mem is lower in memory than mem */
if((size_t)mem-(size_t)fm>=(size_t)1<<(SIZE_T_BITSIZE-1)) return 0;
#endif
assert(ok_magic(fm)); /* If this fails, someone tried to free a block twice */
if(ok_magic(fm))
return fm;
}
}
#ifdef WIN32
#ifdef _MSC_VER
__except(1) { }
#endif
#endif /* WIN32 */
#endif /* ENABLE_FAST_HEAP_DETECTION */
#endif /* USE_ALLOCATOR */
#endif /* USE_MAGIC_HEADERS */
}
return 0;
}
NEDMALLOCNOALIASATTR size_t nedblksize(int *RESTRICT isforeign, void *RESTRICT mem, unsigned flags) THROWSPEC
{
if(mem)
{
if(isforeign) *isforeign=1;
#if USE_MAGIC_HEADERS
{
size_t *_mem=(size_t *) mem-3;
if(_mem[0]==*(size_t *) "NEDMALOC")
{
mstate mspace=(mstate) _mem[1];
size_t size=_mem[2];
if(isforeign) *isforeign=0;
return size;
}
}
#elif USE_ALLOCATOR==1
if((flags & NM_SKIP_TOLERANCE_CHECKS) || nedblkmstate(mem))
{
mchunkptr p=mem2chunk(mem);
if(isforeign) *isforeign=0;
return chunksize(p)-overhead_for(p);
}
#ifdef DEBUG
else
{
int a=1; /* Set breakpoints here if needed */
}
#endif
#endif
#if defined(ENABLE_TOLERANT_NEDMALLOC) || USE_ALLOCATOR==0
return sysblksize(mem);
#endif
}
return 0;
}
NEDMALLOCNOALIASATTR size_t nedmemsize(void *RESTRICT mem) THROWSPEC { return nedblksize(0, mem, 0); }
NEDMALLOCNOALIASATTR void nedsetvalue(void *v) THROWSPEC { nedpsetvalue((nedpool *) 0, v); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedmalloc(size_t size) THROWSPEC { return nedpmalloc((nedpool *) 0, size); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedcalloc(size_t no, size_t size) THROWSPEC { return nedpcalloc((nedpool *) 0, no, size); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedrealloc(void *mem, size_t size) THROWSPEC { return nedprealloc((nedpool *) 0, mem, size); }
NEDMALLOCNOALIASATTR void nedfree(void *mem) THROWSPEC { nedpfree((nedpool *) 0, mem); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedmemalign(size_t alignment, size_t bytes) THROWSPEC { return nedpmemalign((nedpool *) 0, alignment, bytes); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedmalloc2(size_t size, size_t alignment, unsigned flags) THROWSPEC { return nedpmalloc2((nedpool *) 0, size, alignment, flags); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void * nedrealloc2(void *mem, size_t size, size_t alignment, unsigned flags) THROWSPEC { return nedprealloc2((nedpool *) 0, mem, size, alignment, flags); }
NEDMALLOCNOALIASATTR void nedfree2(void *mem, unsigned flags) THROWSPEC { nedpfree2((nedpool *) 0, mem, flags); }
NEDMALLOCNOALIASATTR struct nedmallinfo nedmallinfo(void) THROWSPEC { return nedpmallinfo((nedpool *) 0); }
NEDMALLOCNOALIASATTR int nedmallopt(int parno, int value) THROWSPEC { return nedpmallopt((nedpool *) 0, parno, value); }
NEDMALLOCNOALIASATTR int nedmalloc_trim(size_t pad) THROWSPEC { return nedpmalloc_trim((nedpool *) 0, pad); }
void nedmalloc_stats() THROWSPEC { nedpmalloc_stats((nedpool *) 0); }
NEDMALLOCNOALIASATTR size_t nedmalloc_footprint() THROWSPEC { return nedpmalloc_footprint((nedpool *) 0); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void **nedindependent_calloc(size_t elemsno, size_t elemsize, void **chunks) THROWSPEC { return nedpindependent_calloc((nedpool *) 0, elemsno, elemsize, chunks); }
NEDMALLOCNOALIASATTR NEDMALLOCPTRATTR void **nedindependent_comalloc(size_t elems, size_t *sizes, void **chunks) THROWSPEC { return nedpindependent_comalloc((nedpool *) 0, elems, sizes, chunks); }
#ifdef WIN32
typedef unsigned __int64 timeCount;
static timeCount GetTimestamp()
{
static LARGE_INTEGER ticksPerSec;
static double scalefactor;
static timeCount baseCount;
LARGE_INTEGER val;
timeCount ret;
if(!scalefactor)
{
if(QueryPerformanceFrequency(&ticksPerSec))
scalefactor=ticksPerSec.QuadPart/1000000000000.0;
else
scalefactor=1;
}
if(!QueryPerformanceCounter(&val))
return (timeCount) GetTickCount() * 1000000000;
ret=(timeCount) (val.QuadPart/scalefactor);
if(!baseCount) baseCount=ret;
return ret-baseCount;
}
#else
#include <sys/time.h>
typedef unsigned long long timeCount;
static timeCount GetTimestamp()
{
static timeCount baseCount;
timeCount ret;
#ifdef CLOCK_MONOTONIC
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
ret=((timeCount) ts.tv_sec*1000000000000LL)+ts.tv_nsec*1000LL;
#else
struct timeval tv;
gettimeofday(&tv, 0);
ret=((timeCount) tv.tv_sec*1000000000000LL)+tv.tv_usec*1000000LL;
#endif
if(!baseCount) baseCount=ret;
return ret-baseCount;
}
#endif
/* Set ENABLE_LOGGING to an AND mask of which of these you want to
log, so set it to 0xffffffff for everything */
typedef enum LogEntryType_t
{
LOGENTRY_MALLOC =(1<<0),
LOGENTRY_REALLOC =(1<<1),
LOGENTRY_FREE =(1<<2),
LOGENTRY_THREADCACHE_MALLOC =(1<<3),
LOGENTRY_THREADCACHE_FREE =(1<<4),
LOGENTRY_THREADCACHE_CLEAN =(1<<5),
LOGENTRY_POOL_MALLOC =(1<<6),
LOGENTRY_POOL_REALLOC =(1<<7),
LOGENTRY_POOL_FREE =(1<<8)
} LogEntryType;
#if NEDMALLOC_STACKBACKTRACEDEPTH
typedef struct StackFrameType_t
{
void *pc;
char module[64];
char functname[256];
char file[96];
int lineno;
} StackFrameType;
#endif
typedef struct logentry_t
{
timeCount timestamp;
nedpool *np;
LogEntryType type;
int mspace;
size_t size;
void *mem;
size_t alignment;
unsigned flags;
void *returned;
#if NEDMALLOC_STACKBACKTRACEDEPTH
StackFrameType stack[NEDMALLOC_STACKBACKTRACEDEPTH];
#endif
} logentry;
static const char *LogEntryTypeStrings[]={
"LOGENTRY_MALLOC",
"LOGENTRY_REALLOC",
"LOGENTRY_FREE",
"LOGENTRY_THREADCACHE_MALLOC",
"LOGENTRY_THREADCACHE_FREE",
"LOGENTRY_THREADCACHE_CLEAN",
"LOGENTRY_POOL_MALLOC",
"LOGENTRY_POOL_REALLOC",
"LOGENTRY_POOL_FREE",
"******************"
};
struct threadcacheblk_t;
typedef struct threadcacheblk_t threadcacheblk;
struct threadcacheblk_t
{ /* Keep less than 32 bytes as sizeof(threadcacheblk) is the minimum allocation size */
#ifdef FULLSANITYCHECKS
unsigned int magic;
#endif
int isforeign;
unsigned int lastUsed;
size_t size;
threadcacheblk *RESTRICT next, *RESTRICT prev;
};
typedef struct threadcache_t
{
#ifdef FULLSANITYCHECKS
unsigned int magic1;
#endif
int mymspace; /* Last mspace entry this thread used */
long threadid;
unsigned int mallocs, frees, successes;
#if ENABLE_LOGGING
logentry *logentries, *logentriesptr, *logentriesend;
#endif
size_t freeInCache; /* How much free space is stored in this cache */
threadcacheblk *RESTRICT bins[(THREADCACHEMAXBINS+1)*2];
#ifdef FULLSANITYCHECKS
unsigned int magic2;
#endif
} threadcache;
struct nedpool_t
{
#if USE_LOCKS
MLOCK_T mutex;
#endif
void *uservalue;
int threads; /* Max entries in m to use */
threadcache *RESTRICT caches[THREADCACHEMAXCACHES];
TLSVAR mycache; /* Thread cache for this thread. 0 for unset, negative for use mspace-1 directly, otherwise is cache-1 */
mstate m[MAXTHREADSINPOOL+1]; /* mspace entries for this pool */
};
static nedpool syspool;
#if ENABLE_LOGGING
#if NEDMALLOC_STACKBACKTRACEDEPTH
#if defined(WIN32) && defined(_MSC_VER)
#define COPY_STRING(d, s, maxlen) { size_t len=strlen(s); len=(len>maxlen) ? maxlen-1 : len; memcpy(d, s, len); d[len]=0; }
#pragma optimize("g", off)
static int ExceptionFilter(unsigned int code, struct _EXCEPTION_POINTERS *ep, CONTEXT *ct) THROWSPEC
{
*ct=*ep->ContextRecord;
return EXCEPTION_EXECUTE_HANDLER;
}
static DWORD64 __stdcall GetModBase(HANDLE hProcess, DWORD64 dwAddr) THROWSPEC
{
DWORD64 modulebase;
// Try to get the module base if already loaded, otherwise load the module
modulebase=SymGetModuleBase64(hProcess, dwAddr);
if(modulebase)
return modulebase;
else
{
MEMORY_BASIC_INFORMATION stMBI ;
if ( 0 != VirtualQueryEx ( hProcess, (LPCVOID)(size_t)dwAddr, &stMBI, sizeof(stMBI)))
{
int n;
DWORD dwPathLen=0, dwNameLen=0 ;
TCHAR szFile[ MAX_PATH ], szModuleName[ MAX_PATH ] ;
MODULEINFO mi={0};
dwPathLen = GetModuleFileName ( (HMODULE) stMBI.AllocationBase , szFile, MAX_PATH );
dwNameLen = GetModuleBaseName (hProcess, (HMODULE) stMBI.AllocationBase , szModuleName, MAX_PATH );
for(n=dwNameLen; n>0; n--)
{
if(szModuleName[n]=='.')
{
szModuleName[n]=0;
break;
}
}
if(!GetModuleInformation(hProcess, (HMODULE) stMBI.AllocationBase, &mi, sizeof(mi)))
{
//fxmessage("WARNING: GetModuleInformation() returned error code %d\n", GetLastError());
}
if(!SymLoadModule64 ( hProcess, NULL, (PSTR)( (dwPathLen) ? szFile : 0), (PSTR)( (dwNameLen) ? szModuleName : 0),
(DWORD64) mi.lpBaseOfDll, mi.SizeOfImage))
{
//fxmessage("WARNING: SymLoadModule64() returned error code %d\n", GetLastError());
}
//fxmessage("%s, %p, %x, %x\n", szFile, mi.lpBaseOfDll, mi.SizeOfImage, (DWORD) mi.lpBaseOfDll+mi.SizeOfImage);
modulebase=SymGetModuleBase64(hProcess, dwAddr);
return modulebase;
}
}
return 0;
}
extern HANDLE sym_myprocess;
extern VOID (WINAPI *RtlCaptureContextAddr)(PCONTEXT);
extern void DeinitSym(void) THROWSPEC;
static void DoStackWalk(logentry *p) THROWSPEC
{
int i,i2;
HANDLE mythread=(HANDLE) GetCurrentThread();
STACKFRAME64 sf={ 0 };
CONTEXT ct={ 0 };
if(!sym_myprocess)
{
DWORD symopts;
DuplicateHandle(GetCurrentProcess(), GetCurrentProcess(), GetCurrentProcess(), &sym_myprocess, 0, FALSE, DUPLICATE_SAME_ACCESS);
symopts=SymGetOptions();
SymSetOptions(symopts /*| SYMOPT_DEFERRED_LOADS*/ | SYMOPT_LOAD_LINES);
SymInitialize(sym_myprocess, NULL, TRUE);
atexit(DeinitSym);
}
ct.ContextFlags=CONTEXT_FULL;
// Use RtlCaptureContext() if we have it as it saves an exception throw
if((VOID (WINAPI *)(PCONTEXT)) -1==RtlCaptureContextAddr)
RtlCaptureContextAddr=(VOID (WINAPI *)(PCONTEXT)) GetProcAddress(GetModuleHandle(L"kernel32"), "RtlCaptureContext");
if(RtlCaptureContextAddr)
RtlCaptureContextAddr(&ct);
else
{ // This is nasty, but it works
__try
{
int *foo=0;
*foo=78;
}
__except (ExceptionFilter(GetExceptionCode(), GetExceptionInformation(), &ct))
{
}
}
sf.AddrPC.Mode=sf.AddrStack.Mode=sf.AddrFrame.Mode=AddrModeFlat;
#if !(defined(_M_AMD64) || defined(_M_X64))
sf.AddrPC.Offset =ct.Eip;
sf.AddrStack.Offset=ct.Esp;
sf.AddrFrame.Offset=ct.Ebp;
#else
sf.AddrPC.Offset =ct.Rip;
sf.AddrStack.Offset=ct.Rsp;
sf.AddrFrame.Offset=ct.Rbp; // maybe Rdi?
#endif
for(i2=0; i2<NEDMALLOC_STACKBACKTRACEDEPTH; i2++)
{
IMAGEHLP_MODULE64 ihm={ sizeof(IMAGEHLP_MODULE64) };
char temp[MAX_PATH+sizeof(IMAGEHLP_SYMBOL64)];
IMAGEHLP_SYMBOL64 *ihs;
IMAGEHLP_LINE64 ihl={ sizeof(IMAGEHLP_LINE64) };
DWORD64 offset;
if(!StackWalk64(
#if !(defined(_M_AMD64) || defined(_M_X64))
IMAGE_FILE_MACHINE_I386,
#else
IMAGE_FILE_MACHINE_AMD64,
#endif
sym_myprocess, mythread, &sf, &ct, NULL, SymFunctionTableAccess64, GetModBase, NULL))
break;
if(0==sf.AddrPC.Offset)
break;
i=i2;
if(i) // Skip first entry relating to this function
{
DWORD lineoffset=0;
p->stack[i-1].pc=(void *)(size_t) sf.AddrPC.Offset;
if(SymGetModuleInfo64(sym_myprocess, sf.AddrPC.Offset, &ihm))
{
char *leaf;
leaf=strrchr(ihm.ImageName, '\\');
if(!leaf) leaf=ihm.ImageName-1;
COPY_STRING(p->stack[i-1].module, leaf+1, sizeof(p->stack[i-1].module));
}
else strcpy(p->stack[i-1].module, "<unknown>");
//fxmessage("WARNING: SymGetModuleInfo64() returned error code %d\n", GetLastError());
memset(temp, 0, MAX_PATH+sizeof(IMAGEHLP_SYMBOL64));
ihs=(IMAGEHLP_SYMBOL64 *) temp;
ihs->SizeOfStruct=sizeof(IMAGEHLP_SYMBOL64);
ihs->Address=sf.AddrPC.Offset;
ihs->MaxNameLength=MAX_PATH;
if(SymGetSymFromAddr64(sym_myprocess, sf.AddrPC.Offset, &offset, ihs))
{
COPY_STRING(p->stack[i-1].functname, ihs->Name, sizeof(p->stack[i-1].functname));
if(strlen(p->stack[i-1].functname)<sizeof(p->stack[i-1].functname)-8)
{
sprintf(strchr(p->stack[i-1].functname, 0), " +0x%x", offset);
}
}
else
strcpy(p->stack[i-1].functname, "<unknown>");
if(SymGetLineFromAddr64(sym_myprocess, sf.AddrPC.Offset, &lineoffset, &ihl))
{
char *leaf;
p->stack[i-1].lineno=ihl.LineNumber;
leaf=strrchr(ihl.FileName, '\\');
if(!leaf) leaf=ihl.FileName-1;
COPY_STRING(p->stack[i-1].file, leaf+1, sizeof(p->stack[i-1].file));
}
else
strcpy(p->stack[i-1].file, "<unknown>");
}
}
}
#pragma optimize("g", on)
#else
static void DoStackWalk(logentry *p) THROWSPEC
{
void *backtr[NEDMALLOC_STACKBACKTRACEDEPTH];
size_t size;
char **strings;
size_t i2;
size=backtrace(backtr, NEDMALLOC_STACKBACKTRACEDEPTH);
strings=backtrace_symbols(backtr, size);
for(i2=0; i2<size; i2++)
{ // Format can be <file path>(<mangled symbol>+0x<offset>) [<pc>]
// or can be <file path> [<pc>]
int start=0, end=strlen(strings[i2]), which=0, idx;