June 2022 - Wine-Devel - list.winehq.org

Re: [PATCH 6/6] ntdll: Use a more compact block layout.

by Marvin

Hi, While running your changed tests, I think I found new failures. Being a bot and all I'm not very good at pattern recognition, so I might be wrong, but could you please double-check? Full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=115917 Your paranoid android. === debian11 (64 bit WoW report) === ntdll: env.c:461: Test failed: wrong end ptr 000000000085195C/0000000000851960

June 1, 2022

Re: [PATCH 5/6] ntdll: Round free block size to block size alignment.

by Marvin

Hi, While running your changed tests, I think I found new failures. Being a bot and all I'm not very good at pattern recognition, so I might be wrong, but could you please double-check? Full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=115916 Your paranoid android. === debian11 (64 bit WoW report) === ntdll: env.c:461: Test failed: wrong end ptr 000000000085195C/0000000000851960

June 1, 2022

Re: [PATCH 4/6] ntdll: Improve block size rounding compatibility.

by Marvin

Hi, While running your changed tests, I think I found new failures. Being a bot and all I'm not very good at pattern recognition, so I might be wrong, but could you please double-check? Full results can be found at: https://testbot.winehq.org/JobDetails.pl?Key=115915 Your paranoid android. === debian11 (64 bit WoW report) === ntdll: env.c:461: Test failed: wrong end ptr 000000000085195C/0000000000851960

June 1, 2022

Re: [PATCH 0/1] MR163: avicap32: Add fallback Unixlib function and thunk to use when V4L is unavailable.

by Alexandre Julliard (＠julliard)

A better way would be to check for failure of the NtQueryVirtualMemory(MemoryWineUnixFuncs) call. -- https://gitlab.winehq.org/wine/wine/-/merge_requests/163#note_1453

June 1, 2022

[PATCH 6/6] ntdll: Use a more compact block layout.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> With a separate block_flags field. Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/ntdll/heap.c | 40 ++++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 18 deletions(-) diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index 0d7feee189b..7f6108d6214 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -78,9 +78,10 @@ struct rtl_heap_entry struct block { - DWORD size; /* Block size; must be the first field */ - DWORD magic : 24; /* Magic number */ - DWORD unused_bytes : 8; /* Number of bytes in the block not used by user data (max value is HEAP_MIN_DATA_SIZE+HEAP_MIN_SHRINK_SIZE) */ + WORD block_size; /* block size in multiple of ALIGNMENT */ + BYTE block_flags; + BYTE tail_size; /* unused size (used block) / high size bits (free block) */ + DWORD magic; }; C_ASSERT( sizeof(struct block) == 8 ); @@ -228,36 +229,39 @@ static inline BOOL contains( const void *a, SIZE_T a_size, const void *b, SIZE_T static inline UINT block_get_flags( const struct block *block ) { - return block->size & ~ARENA_SIZE_MASK; + return block->block_flags; } static inline UINT block_get_type( const struct block *block ) { - if (block_get_flags( block ) & BLOCK_FLAG_FREE) return (block->unused_bytes << 24)|block->magic; return block->magic; } static inline void block_set_type( struct block *block, UINT type ) { - if (type >> 24) block->unused_bytes = type >> 24; block->magic = type; } static inline UINT block_get_overhead( const struct block *block ) { if (block_get_flags( block ) & BLOCK_FLAG_FREE) return sizeof(*block) + sizeof(struct list); - return sizeof(*block) + block->unused_bytes; + return sizeof(*block) + block->tail_size; } /* return the size of a block, including its header */ static inline UINT block_get_size( const struct block *block ) { - return block->size & ARENA_SIZE_MASK; + UINT block_size = block->block_size; + if (block_get_flags( block ) & BLOCK_FLAG_FREE) block_size += (UINT)block->tail_size << 16; + return block_size * ALIGNMENT; } -static inline void block_set_size( struct block *block, UINT flags, UINT block_size ) +static inline void block_set_size( struct block *block, UINT block_flags, UINT block_size ) { - block->size = (block_size & ARENA_SIZE_MASK) | (flags & ~ARENA_SIZE_MASK); + block_size /= ALIGNMENT; + if (block_flags & BLOCK_FLAG_FREE) block->tail_size = block_size >> 16; + block->block_size = block_size; + block->block_flags = block_flags; } static inline void *subheap_base( const SUBHEAP *subheap ) @@ -350,7 +354,7 @@ static inline void mark_block_free( void *ptr, SIZE_T size, DWORD flags ) /* mark a block of memory as a tail block */ static inline void mark_block_tail( struct block *block, DWORD flags ) { - char *tail = (char *)block + block_get_size( block ) - block->unused_bytes; + char *tail = (char *)block + block_get_size( block ) - block->tail_size; if (flags & HEAP_TAIL_CHECKING_ENABLED) { valgrind_make_writable( tail, ALIGNMENT ); @@ -518,7 +522,7 @@ static void heap_dump( const HEAP *heap ) { TRACE( " %p: (used) type %#10x, size %#8x, flags %#4x, unused %#4x", block, block_get_type( block ), block_get_size( block ), block_get_flags( block ), - block->unused_bytes ); + block->tail_size ); if (!(block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)) TRACE( "\n" ); else TRACE( ", back %p\n", *((struct block **)block - 1) ); @@ -548,7 +552,7 @@ static void heap_dump( const HEAP *heap ) if (!(block = heap->pending_free[i])) break; TRACE( " %c%p: (pend) type %#10x, size %#8x, flags %#4x, unused %#4x", i == heap->pending_pos ? '*' : ' ', - block, block_get_type( block ), block_get_size( block ), block_get_flags( block ), block->unused_bytes ); + block, block_get_type( block ), block_get_size( block ), block_get_flags( block ), block->tail_size ); if (!(block_get_flags( block ) & BLOCK_FLAG_PREV_FREE)) TRACE( "\n" ); else TRACE( ", back %p\n", *((struct block **)block - 1) ); } @@ -763,15 +767,15 @@ static inline void shrink_used_block( SUBHEAP *subheap, struct block *block, UIN if (old_block_size >= block_size + HEAP_MIN_BLOCK_SIZE) { block_set_size( block, flags, block_size ); - block->unused_bytes = block_size - sizeof(*block) - size; + block->tail_size = block_size - sizeof(*block) - size; create_free_block( subheap, next_block( subheap, block ), old_block_size - block_size ); } else { struct block *next; block_set_size( block, flags, old_block_size ); - block->unused_bytes = old_block_size - sizeof(*block) - size; - if ((next = next_block( subheap, block ))) next->size &= ~BLOCK_FLAG_PREV_FREE; + block->tail_size = old_block_size - sizeof(*block) - size; + if ((next = next_block( subheap, block ))) next->block_flags &= ~BLOCK_FLAG_PREV_FREE; } } @@ -1136,7 +1140,7 @@ static BOOL validate_used_block( const SUBHEAP *subheap, const struct block *blo err = "invalid block flags"; else if (!contains( base, commit_end - base, block, block_get_size( block ) )) err = "invalid block size"; - else if (block->unused_bytes > block_get_size( block ) - sizeof(*block)) + else if (block->tail_size > block_get_size( block ) - sizeof(*block)) err = "invalid block unused size"; else if ((next = next_block( subheap, block )) && (block_get_flags( next ) & BLOCK_FLAG_PREV_FREE)) err = "invalid next block flags"; @@ -1162,7 +1166,7 @@ static BOOL validate_used_block( const SUBHEAP *subheap, const struct block *blo } else if (!err && (flags & HEAP_TAIL_CHECKING_ENABLED)) { - const unsigned char *tail = (unsigned char *)block + block_get_size( block ) - block->unused_bytes; + const unsigned char *tail = (unsigned char *)block + block_get_size( block ) - block->tail_size; for (i = 0; !err && i < ALIGNMENT; i++) if (tail[i] != ARENA_TAIL_FILLER) err = "invalid block tail"; } -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022

[PATCH 5/6] ntdll: Round free block size to block size alignment.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> Block sizes are now always rounded to ALIGNMENT multiple, except for the last free block in a region. This makes it consistent and will let us use a more compact block layout. Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/ntdll/heap.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index cad644f2153..0d7feee189b 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -892,6 +892,7 @@ static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, LPVOID address, DWORD flags, SIZE_T commitSize, SIZE_T totalSize ) { struct entry *pEntry; + SIZE_T block_size; SUBHEAP *subheap; unsigned int i; @@ -991,9 +992,9 @@ static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, LPVOID address, DWORD flags, } } - /* Create the first free block */ - - create_free_block( subheap, first_block( subheap ), subheap_size( subheap ) - subheap_overhead( subheap ) ); + block_size = subheap_size( subheap ) - subheap_overhead( subheap ); + block_size &= ~(ALIGNMENT - 1); + create_free_block( subheap, first_block( subheap ), block_size ); return subheap; } -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022

[PATCH 4/6] ntdll: Improve block size rounding compatibility.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> This also increase the default heap size to 2MiB (32bit) / 4MiB (64bit), for the tests to pass. Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/kernel32/tests/heap.c | 6 +---- dlls/ntdll/heap.c | 46 +++++++++++++++++++++++++------------- 2 files changed, 32 insertions(+), 20 deletions(-) diff --git a/dlls/kernel32/tests/heap.c b/dlls/kernel32/tests/heap.c index bb5e57fe94e..91f582f36de 100644 --- a/dlls/kernel32/tests/heap.c +++ b/dlls/kernel32/tests/heap.c @@ -1055,7 +1055,6 @@ static void test_HeapCreate(void) { if (entries[i].wFlags != PROCESS_HEAP_ENTRY_BUSY) continue; ok( entries[i].cbData == 0x18 + 2 * sizeof(void *), "got cbData %#lx\n", entries[i].cbData ); - todo_wine_if(sizeof(void *) == 8) ok( entries[i].cbOverhead == 0x8, "got cbOverhead %#x\n", entries[i].cbOverhead ); } @@ -2175,10 +2174,7 @@ static void test_block_layout( HANDLE heap, DWORD global_flags, DWORD heap_flags expect_size = max( alloc_size, 2 * sizeof(void *) ); expect_size = ALIGN_BLOCK_SIZE( expect_size + extra_size ); diff = min( llabs( ptr2 - ptr1 ), llabs( ptr1 - ptr0 ) ); - todo_wine_if( (heap_flags & (HEAP_VALIDATE_PARAMS|HEAP_VALIDATE_ALL)) || - ((global_flags & ~FLG_HEAP_ENABLE_TAIL_CHECK) && alloc_size < 0x10000) || - (!global_flags && alloc_size < 2 * sizeof(void *)) || - (alloc_size == 0xfd000 && sizeof(void *) == 8) ) + todo_wine_if( (!(global_flags & ~FLG_HEAP_ENABLE_FREE_CHECK) && alloc_size < 2 * sizeof(void *)) ) ok( diff == expect_size, "got diff %#Ix exp %#Ix\n", diff, expect_size ); ok( !memcmp( ptr0 + alloc_size, tail_buf, tail_size ), "missing block tail\n" ); diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index b6704117bc3..cad644f2153 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -127,20 +127,18 @@ typedef struct /* everything is aligned on 8 byte boundaries (16 for Win64) */ #define LARGE_ALIGNMENT 16 /* large blocks have stricter alignment */ -#define ARENA_OFFSET (ALIGNMENT - sizeof(struct block)) #define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */ C_ASSERT( sizeof(ARENA_LARGE) % LARGE_ALIGNMENT == 0 ); #define ROUND_ADDR(addr, mask) ((void *)((UINT_PTR)(addr) & ~(UINT_PTR)(mask))) -#define ROUND_SIZE(size) ((((size) + ALIGNMENT - 1) & ~(ALIGNMENT-1)) + ARENA_OFFSET) - -/* minimum data size (without arenas) of an allocated block */ -/* make sure that it's larger than a free list entry */ -#define HEAP_MIN_DATA_SIZE ROUND_SIZE(2 * sizeof(struct list)) -#define HEAP_MIN_BLOCK_SIZE (HEAP_MIN_DATA_SIZE + sizeof(struct block)) -/* minimum size that must remain to shrink an allocated block */ -#define HEAP_MIN_SHRINK_SIZE (HEAP_MIN_DATA_SIZE+sizeof(struct entry)) +#define ROUND_SIZE(size, mask) ((((SIZE_T)(size) + (mask)) & ~(SIZE_T)(mask))) + +#define HEAP_MIN_BLOCK_SIZE ROUND_SIZE(sizeof(struct entry) + ALIGNMENT, ALIGNMENT - 1) + +C_ASSERT( sizeof(struct block) <= HEAP_MIN_BLOCK_SIZE ); +C_ASSERT( sizeof(struct entry) <= HEAP_MIN_BLOCK_SIZE ); + /* minimum size to start allocating large blocks */ #define HEAP_MIN_LARGE_BLOCK_SIZE (0x10000 * ALIGNMENT - 0x1000) /* extra size to add at the end of block for tail checking */ @@ -208,7 +206,7 @@ C_ASSERT( offsetof(HEAP, subheap) <= COMMIT_MASK ); #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24))) -#define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */ +#define HEAP_DEF_SIZE (0x40000 * ALIGNMENT) #define MAX_FREE_PENDING 1024 /* max number of free requests to delay */ /* some undocumented flags (names are made up) */ @@ -217,6 +215,7 @@ C_ASSERT( offsetof(HEAP, subheap) <= COMMIT_MASK ); #define HEAP_VALIDATE 0x10000000 #define HEAP_VALIDATE_ALL 0x20000000 #define HEAP_VALIDATE_PARAMS 0x40000000 +#define HEAP_CHECKING_ENABLED 0x80000000 static HEAP *processHeap; /* main process heap */ @@ -447,7 +446,8 @@ static RTL_CRITICAL_SECTION_DEBUG process_heap_cs_debug = static inline ULONG heap_get_flags( const HEAP *heap, ULONG flags ) { - flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY; + if (flags & (HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED)) flags |= HEAP_CHECKING_ENABLED; + flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY | HEAP_CHECKING_ENABLED; return heap->flags | flags; } @@ -760,7 +760,7 @@ static void free_used_block( SUBHEAP *subheap, struct block *block ) static inline void shrink_used_block( SUBHEAP *subheap, struct block *block, UINT flags, SIZE_T old_block_size, SIZE_T block_size, SIZE_T size ) { - if (old_block_size >= block_size + HEAP_MIN_SHRINK_SIZE) + if (old_block_size >= block_size + HEAP_MIN_BLOCK_SIZE) { block_set_size( block, flags, block_size ); block->unused_bytes = block_size - sizeof(*block) - size; @@ -782,7 +782,7 @@ static inline void shrink_used_block( SUBHEAP *subheap, struct block *block, UIN static void *allocate_large_block( HEAP *heap, DWORD flags, SIZE_T size ) { ARENA_LARGE *arena; - SIZE_T block_size = sizeof(*arena) + ROUND_SIZE( size ); + SIZE_T block_size = ROUND_SIZE( sizeof(*arena) + size, COMMIT_MASK ); LPVOID address = NULL; if (!(flags & HEAP_GROWABLE)) return NULL; @@ -1469,13 +1469,29 @@ HANDLE WINAPI RtlDestroyHeap( HANDLE heap ) return 0; } +static SIZE_T heap_get_block_size( HEAP *heap, ULONG flags, SIZE_T size ) +{ + static const ULONG padd_flags = HEAP_VALIDATE | HEAP_VALIDATE_ALL | HEAP_VALIDATE_PARAMS; + static const ULONG check_flags = HEAP_TAIL_CHECKING_ENABLED | HEAP_FREE_CHECKING_ENABLED | HEAP_CHECKING_ENABLED; + SIZE_T overhead; + + if ((flags & check_flags)) overhead = ALIGNMENT; + else overhead = sizeof(struct block); + + if ((flags & HEAP_TAIL_CHECKING_ENABLED) || RUNNING_ON_VALGRIND) overhead += ALIGNMENT; + if (flags & padd_flags) overhead += ALIGNMENT; + + if (size < ALIGNMENT) size = ALIGNMENT; + return ROUND_SIZE( size + overhead, ALIGNMENT - 1 ); +} + static NTSTATUS heap_allocate( HEAP *heap, ULONG flags, SIZE_T size, void **ret ) { SIZE_T old_block_size, block_size; struct block *block; SUBHEAP *subheap; - block_size = sizeof(*block) + ROUND_SIZE(size) + HEAP_TAIL_EXTRA_SIZE(flags); + block_size = heap_get_block_size( heap, flags, size ); if (block_size < size) return STATUS_NO_MEMORY; /* overflow */ if (block_size < HEAP_MIN_BLOCK_SIZE) block_size = HEAP_MIN_BLOCK_SIZE; @@ -1572,7 +1588,7 @@ static NTSTATUS heap_reallocate( HEAP *heap, ULONG flags, void *ptr, SIZE_T size SUBHEAP *subheap; NTSTATUS status; - block_size = sizeof(*block) + ROUND_SIZE(size) + HEAP_TAIL_EXTRA_SIZE(flags); + block_size = heap_get_block_size( heap, flags, size ); if (block_size < size) return STATUS_NO_MEMORY; /* overflow */ if (block_size < HEAP_MIN_BLOCK_SIZE) block_size = HEAP_MIN_BLOCK_SIZE; -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022

[PATCH 3/6] ntdll: Remove unnecessary constants and typedefs.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/ntdll/heap.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index ca495d4dc8c..b6704117bc3 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -76,12 +76,12 @@ struct rtl_heap_entry #define ALIGNMENT (2 * sizeof(void *)) -typedef struct block +struct block { DWORD size; /* Block size; must be the first field */ DWORD magic : 24; /* Magic number */ DWORD unused_bytes : 8; /* Number of bytes in the block not used by user data (max value is HEAP_MIN_DATA_SIZE+HEAP_MIN_SHRINK_SIZE) */ -} ARENA_INUSE; +}; C_ASSERT( sizeof(struct block) == 8 ); @@ -127,7 +127,7 @@ typedef struct /* everything is aligned on 8 byte boundaries (16 for Win64) */ #define LARGE_ALIGNMENT 16 /* large blocks have stricter alignment */ -#define ARENA_OFFSET (ALIGNMENT - sizeof(ARENA_INUSE)) +#define ARENA_OFFSET (ALIGNMENT - sizeof(struct block)) #define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */ C_ASSERT( sizeof(ARENA_LARGE) % LARGE_ALIGNMENT == 0 ); @@ -138,7 +138,7 @@ C_ASSERT( sizeof(ARENA_LARGE) % LARGE_ALIGNMENT == 0 ); /* minimum data size (without arenas) of an allocated block */ /* make sure that it's larger than a free list entry */ #define HEAP_MIN_DATA_SIZE ROUND_SIZE(2 * sizeof(struct list)) -#define HEAP_MIN_BLOCK_SIZE (HEAP_MIN_DATA_SIZE + sizeof(ARENA_INUSE)) +#define HEAP_MIN_BLOCK_SIZE (HEAP_MIN_DATA_SIZE + sizeof(struct block)) /* minimum size that must remain to shrink an allocated block */ #define HEAP_MIN_SHRINK_SIZE (HEAP_MIN_DATA_SIZE+sizeof(struct entry)) /* minimum size to start allocating large blocks */ @@ -195,7 +195,7 @@ typedef struct tagHEAP SIZE_T min_size; /* Minimum committed size */ DWORD magic; /* Magic number */ DWORD pending_pos; /* Position in pending free requests ring */ - ARENA_INUSE **pending_free; /* Ring buffer for pending free requests */ + struct block **pending_free; /* Ring buffer for pending free requests */ RTL_CRITICAL_SECTION cs; struct entry free_lists[HEAP_NB_FREE_LISTS]; SUBHEAP subheap; @@ -1528,7 +1528,7 @@ void *WINAPI DECLSPEC_HOTPATCH RtlAllocateHeap( HANDLE heap, ULONG flags, SIZE_T static NTSTATUS heap_free( HEAP *heap, void *ptr ) { - ARENA_INUSE *block; + struct block *block; SUBHEAP *subheap; if (!(block = unsafe_block_from_ptr( heap, ptr, &subheap ))) return STATUS_INVALID_PARAMETER; @@ -1716,7 +1716,7 @@ BOOLEAN WINAPI RtlUnlockHeap( HANDLE heap ) static NTSTATUS heap_size( HEAP *heap, const void *ptr, SIZE_T *size ) { - const ARENA_INUSE *block; + const struct block *block; SUBHEAP *subheap; if (!(block = unsafe_block_from_ptr( heap, ptr, &subheap ))) return STATUS_INVALID_PARAMETER; -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022

[PATCH 2/6] ntdll: Use a fixed block tail size.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/ntdll/heap.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index fa0900ee319..ca495d4dc8c 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -349,14 +349,15 @@ static inline void mark_block_free( void *ptr, SIZE_T size, DWORD flags ) } /* mark a block of memory as a tail block */ -static inline void mark_block_tail( void *ptr, SIZE_T size, DWORD flags ) +static inline void mark_block_tail( struct block *block, DWORD flags ) { + char *tail = (char *)block + block_get_size( block ) - block->unused_bytes; if (flags & HEAP_TAIL_CHECKING_ENABLED) { - valgrind_make_writable( ptr, size ); - memset( ptr, ARENA_TAIL_FILLER, size ); + valgrind_make_writable( tail, ALIGNMENT ); + memset( tail, ARENA_TAIL_FILLER, ALIGNMENT ); } - valgrind_make_noaccess( ptr, size ); + valgrind_make_noaccess( tail, ALIGNMENT ); } /* initialize contents of a newly created block of memory */ @@ -1161,7 +1162,7 @@ static BOOL validate_used_block( const SUBHEAP *subheap, const struct block *blo else if (!err && (flags & HEAP_TAIL_CHECKING_ENABLED)) { const unsigned char *tail = (unsigned char *)block + block_get_size( block ) - block->unused_bytes; - for (i = 0; !err && i < block->unused_bytes; i++) if (tail[i] != ARENA_TAIL_FILLER) err = "invalid block tail"; + for (i = 0; !err && i < ALIGNMENT; i++) if (tail[i] != ARENA_TAIL_FILLER) err = "invalid block tail"; } if (err) @@ -1328,7 +1329,7 @@ static void heap_set_debug_flags( HANDLE handle ) else { if (block_get_type( block ) == ARENA_PENDING_MAGIC) mark_block_free( block + 1, block_get_size( block ) - sizeof(*block), flags ); - else mark_block_tail( (char *)block + block_get_size( block ) - block->unused_bytes, block->unused_bytes, flags ); + else mark_block_tail( block, flags ); } } } @@ -1493,7 +1494,7 @@ static NTSTATUS heap_allocate( HEAP *heap, ULONG flags, SIZE_T size, void **ret block_set_type( block, ARENA_INUSE_MAGIC ); shrink_used_block( subheap, block, 0, old_block_size, block_size, size ); initialize_block( block + 1, size, flags ); - mark_block_tail( (char *)(block + 1) + size, block->unused_bytes, flags ); + mark_block_tail( block, flags ); *ret = block + 1; return STATUS_SUCCESS; @@ -1614,7 +1615,7 @@ static NTSTATUS heap_reallocate( HEAP *heap, ULONG flags, void *ptr, SIZE_T size shrink_used_block( subheap, block, block_get_flags( block ), old_block_size, block_size, size ); if (size > old_size) initialize_block( (char *)(block + 1) + old_size, size - old_size, flags ); - mark_block_tail( (char *)(block + 1) + size, block->unused_bytes, flags ); + mark_block_tail( block, flags ); /* Return the new arena */ -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022

[PATCH 1/6] ntdll: Call mark_block_tail outside of initialize_block.

by Rémi Bernon

From: Rémi Bernon <rbernon(a)codeweavers.com> Signed-off-by: Rémi Bernon <rbernon(a)codeweavers.com> --- dlls/ntdll/heap.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/dlls/ntdll/heap.c b/dlls/ntdll/heap.c index 00b4cd7e894..fa0900ee319 100644 --- a/dlls/ntdll/heap.c +++ b/dlls/ntdll/heap.c @@ -360,7 +360,7 @@ static inline void mark_block_tail( void *ptr, SIZE_T size, DWORD flags ) } /* initialize contents of a newly created block of memory */ -static inline void initialize_block( void *ptr, SIZE_T size, SIZE_T unused, DWORD flags ) +static inline void initialize_block( void *ptr, SIZE_T size, DWORD flags ) { if (flags & HEAP_ZERO_MEMORY) { @@ -372,8 +372,6 @@ static inline void initialize_block( void *ptr, SIZE_T size, SIZE_T unused, DWOR valgrind_make_writable( ptr, size ); memset( ptr, ARENA_INUSE_FILLER, size ); } - - mark_block_tail( (char *)ptr + size, unused, flags ); } /* notify that a new block of memory has been allocated for debugging purposes */ @@ -833,7 +831,7 @@ static void *realloc_large_block( HEAP *heap, DWORD flags, void *ptr, SIZE_T siz { /* FIXME: we could remap zero-pages instead */ valgrind_notify_resize( arena + 1, old_size, size ); - if (size > old_size) initialize_block( (char *)ptr + old_size, size - old_size, 0, flags ); + if (size > old_size) initialize_block( (char *)ptr + old_size, size - old_size, flags ); arena->data_size = size; valgrind_make_noaccess( (char *)arena + sizeof(*arena) + arena->data_size, arena->block_size - sizeof(*arena) - arena->data_size ); @@ -1494,7 +1492,8 @@ static NTSTATUS heap_allocate( HEAP *heap, ULONG flags, SIZE_T size, void **ret block_set_type( block, ARENA_INUSE_MAGIC ); shrink_used_block( subheap, block, 0, old_block_size, block_size, size ); - initialize_block( block + 1, size, block->unused_bytes, flags ); + initialize_block( block + 1, size, flags ); + mark_block_tail( (char *)(block + 1) + size, block->unused_bytes, flags ); *ret = block + 1; return STATUS_SUCCESS; @@ -1614,8 +1613,8 @@ static NTSTATUS heap_reallocate( HEAP *heap, ULONG flags, void *ptr, SIZE_T size valgrind_notify_resize( block + 1, old_size, size ); shrink_used_block( subheap, block, block_get_flags( block ), old_block_size, block_size, size ); - if (size <= old_size) mark_block_tail( (char *)(block + 1) + size, block->unused_bytes, flags ); - else initialize_block( (char *)(block + 1) + old_size, size - old_size, block->unused_bytes, flags ); + if (size > old_size) initialize_block( (char *)(block + 1) + old_size, size - old_size, flags ); + mark_block_tail( (char *)(block + 1) + size, block->unused_bytes, flags ); /* Return the new arena */ -- GitLab https://gitlab.winehq.org/wine/wine/-/merge_requests/165

June 1, 2022