Merge f40cd9cd60 into 951538d469

Signed-off-by: Nathaniel Brough <nathaniel.brough@gmail.com>

CMakeLists.txt

@@ -173,7 +173,8 @@ if(CMAKE_C_COMPILER_ID MATCHES "Intel")
     list(APPEND mi_cflags -Wall)
 endif()
 
-if(CMAKE_C_COMPILER_ID MATCHES "MSVC|Intel")
+# force C++ compilation with msvc or clang-cl to use modern C++ atomics
+if(CMAKE_C_COMPILER_ID MATCHES "MSVC|Intel" OR MI_CLANG_CL)
   set(MI_USE_CXX "ON")
 endif()
 
@@ -724,21 +725,19 @@ if (MI_BUILD_TESTS)
   if(MI_BUILD_SHARED AND NOT (MI_TRACK_ASAN OR MI_DEBUG_TSAN OR MI_DEBUG_UBSAN))
     add_executable(mimalloc-test-stress-dynamic test/test-stress.c)
     target_compile_definitions(mimalloc-test-stress-dynamic PRIVATE ${mi_defines} "USE_STD_MALLOC=1")
-    if(WIN32)
-      target_compile_definitions(mimalloc-test-stress-dynamic PRIVATE "MI_LINK_VERSION=1")
-    endif()
     target_compile_options(mimalloc-test-stress-dynamic PRIVATE ${mi_cflags})
     target_include_directories(mimalloc-test-stress-dynamic PRIVATE include)
-    target_link_libraries(mimalloc-test-stress-dynamic PRIVATE mimalloc ${mi_libraries})  # mi_version
     if(WIN32)
-      add_test(NAME test-stress-dynamic COMMAND ${CMAKE_COMMAND} -E env MIMALLOC_SHOW_STATS=1 $<TARGET_FILE:mimalloc-test-stress-dynamic>)
+      target_compile_definitions(mimalloc-test-stress-dynamic PRIVATE "MI_LINK_VERSION=1")  # link mi_version
+      target_link_libraries(mimalloc-test-stress-dynamic PRIVATE mimalloc ${mi_libraries})  # link mi_version
+      add_test(NAME test-stress-dynamic COMMAND ${CMAKE_COMMAND} -E env MIMALLOC_VERBOSE=1 $<TARGET_FILE:mimalloc-test-stress-dynamic>)
     else()
       if(APPLE)
         set(LD_PRELOAD "DYLD_INSERT_LIBRARIES")
       else()
         set(LD_PRELOAD "LD_PRELOAD")
       endif()
-      add_test(NAME test-stress-dynamic COMMAND ${CMAKE_COMMAND} -E env MIMALLOC_SHOW_STATS=1 ${LD_PRELOAD}=$<TARGET_FILE:mimalloc> $<TARGET_FILE:mimalloc-test-stress-dynamic>)
+      add_test(NAME test-stress-dynamic COMMAND ${CMAKE_COMMAND} -E env MIMALLOC_VERBOSE=1 ${LD_PRELOAD}=$<TARGET_FILE:mimalloc> $<TARGET_FILE:mimalloc-test-stress-dynamic>)
     endif()
   endif()
 endif()
@@ -760,3 +759,25 @@ if (MI_OVERRIDE)
     endif()
   endif()
 endif()
+
+
+# -----------------------------------------------------------------------------
+# Build fuzz tests
+# -----------------------------------------------------------------------------
+if(DEFINED ENV{LIB_FUZZING_ENGINE})
+  set(FUZZING_ENGINE $ENV{LIB_FUZZING_ENGINE})
+  set(FUZZING_COMPILE_FLAGS "")
+  set(FUZZING_LINK_FLAGS "${FUZZING_ENGINE}")
+else()
+  set(FUZZING_COMPILE_FLAGS "-fsanitize=fuzzer,address")
+  set(FUZZING_LINK_FLAGS "-fsanitize=fuzzer,address")
+endif()
+
+if(('${CMAKE_CXX_COMPILER_ID}' STREQUAL 'Clang') AND NOT MI_DEBUG_TSAN)
+  ## fuzz testing
+  add_executable(mimalloc-test-fuzz  test/test-fuzz.c)
+  target_compile_definitions(mimalloc-test-fuzz PRIVATE ${mi_defines})
+  target_compile_options(mimalloc-test-fuzz PRIVATE ${mi_cflags} "${FUZZING_COMPILE_FLAGS}")
+  target_include_directories(mimalloc-test-fuzz PRIVATE include)
+  target_link_libraries(mimalloc-test-fuzz PRIVATE mimalloc ${mi_libraries} "${FUZZING_LINK_FLAGS}")
+endif()

include/mimalloc/atomic.h

@@ -111,6 +111,7 @@ static inline intptr_t mi_atomic_subi(_Atomic(intptr_t)*p, intptr_t sub);
 #define mi_atomic_cas_ptr_weak_release(tp,p,exp,des)    mi_atomic_cas_weak_release(p,exp,(tp*)des)
 #define mi_atomic_cas_ptr_weak_acq_rel(tp,p,exp,des)    mi_atomic_cas_weak_acq_rel(p,exp,(tp*)des)
 #define mi_atomic_cas_ptr_strong_release(tp,p,exp,des)  mi_atomic_cas_strong_release(p,exp,(tp*)des)
+#define mi_atomic_cas_ptr_strong_acq_rel(tp,p,exp,des)  mi_atomic_cas_strong_acq_rel(p,exp,(tp*)des)
 #define mi_atomic_exchange_ptr_relaxed(tp,p,x)          mi_atomic_exchange_relaxed(p,(tp*)x)
 #define mi_atomic_exchange_ptr_release(tp,p,x)          mi_atomic_exchange_release(p,(tp*)x)
 #define mi_atomic_exchange_ptr_acq_rel(tp,p,x)          mi_atomic_exchange_acq_rel(p,(tp*)x)
@@ -120,6 +121,7 @@ static inline intptr_t mi_atomic_subi(_Atomic(intptr_t)*p, intptr_t sub);
 #define mi_atomic_cas_ptr_weak_release(tp,p,exp,des)    mi_atomic_cas_weak_release(p,exp,des)
 #define mi_atomic_cas_ptr_weak_acq_rel(tp,p,exp,des)    mi_atomic_cas_weak_acq_rel(p,exp,des)
 #define mi_atomic_cas_ptr_strong_release(tp,p,exp,des)  mi_atomic_cas_strong_release(p,exp,des)
+#define mi_atomic_cas_ptr_strong_acq_rel(tp,p,exp,des)  mi_atomic_cas_strong_acq_rel(p,exp,des)
 #define mi_atomic_exchange_ptr_relaxed(tp,p,x)          mi_atomic_exchange_relaxed(p,x)
 #define mi_atomic_exchange_ptr_release(tp,p,x)          mi_atomic_exchange_release(p,x)
 #define mi_atomic_exchange_ptr_acq_rel(tp,p,x)          mi_atomic_exchange_acq_rel(p,x)
@@ -303,6 +305,7 @@ static inline bool mi_atomic_casi64_strong_acq_rel(volatile _Atomic(int64_t*)p,
 #define mi_atomic_cas_ptr_weak_release(tp,p,exp,des)    mi_atomic_cas_weak_release((_Atomic(uintptr_t)*)(p),(uintptr_t*)exp,(uintptr_t)des)
 #define mi_atomic_cas_ptr_weak_acq_rel(tp,p,exp,des)    mi_atomic_cas_weak_acq_rel((_Atomic(uintptr_t)*)(p),(uintptr_t*)exp,(uintptr_t)des)
 #define mi_atomic_cas_ptr_strong_release(tp,p,exp,des)  mi_atomic_cas_strong_release((_Atomic(uintptr_t)*)(p),(uintptr_t*)exp,(uintptr_t)des)
+#define mi_atomic_cas_ptr_strong_acq_rel(tp,p,exp,des)  mi_atomic_cas_strong_acq_rel((_Atomic(uintptr_t)*)(p),(uintptr_t*)exp,(uintptr_t)des)
 #define mi_atomic_exchange_ptr_relaxed(tp,p,x)          (tp*)mi_atomic_exchange_relaxed((_Atomic(uintptr_t)*)(p),(uintptr_t)x)
 #define mi_atomic_exchange_ptr_release(tp,p,x)          (tp*)mi_atomic_exchange_release((_Atomic(uintptr_t)*)(p),(uintptr_t)x)
 #define mi_atomic_exchange_ptr_acq_rel(tp,p,x)          (tp*)mi_atomic_exchange_acq_rel((_Atomic(uintptr_t)*)(p),(uintptr_t)x)

include/mimalloc/internal.h

@@ -140,9 +140,11 @@ void*       _mi_os_alloc_aligned_at_offset(size_t size, size_t alignment, size_t
 void*       _mi_os_get_aligned_hint(size_t try_alignment, size_t size);
 bool        _mi_os_use_large_page(size_t size, size_t alignment);
 size_t      _mi_os_large_page_size(void);
-
 void*       _mi_os_alloc_huge_os_pages(size_t pages, int numa_node, mi_msecs_t max_secs, size_t* pages_reserved, size_t* psize, mi_memid_t* memid);
 
+int         _mi_os_numa_node_count(void);
+int         _mi_os_numa_node(void);
+
 // arena.c
 mi_arena_id_t _mi_arena_id_none(void);
 void        _mi_arena_free(void* p, size_t size, size_t still_committed_size, mi_memid_t memid);
@@ -813,24 +815,6 @@ static inline uintptr_t _mi_random_shuffle(uintptr_t x) {
   return x;
 }
 
-// -------------------------------------------------------------------
-// Optimize numa node access for the common case (= one node)
-// -------------------------------------------------------------------
-
-int    _mi_os_numa_node_get(void);
-size_t _mi_os_numa_node_count_get(void);
-
-extern mi_decl_hidden _Atomic(size_t) _mi_numa_node_count;
-static inline int _mi_os_numa_node(void) {
-  if mi_likely(mi_atomic_load_relaxed(&_mi_numa_node_count) == 1) { return 0; }
-  else return _mi_os_numa_node_get();
-}
-static inline size_t _mi_os_numa_node_count(void) {
-  const size_t count = mi_atomic_load_relaxed(&_mi_numa_node_count);
-  if mi_likely(count > 0) { return count; }
-  else return _mi_os_numa_node_count_get();
-}
-
 
 
 // -----------------------------------------------------------------------

readme.md

@@ -84,7 +84,7 @@ Enjoy!
 
 ### Releases
 
-* 2025-03-28, `v1.9.3`, `v2.2.3`, `v3.0.3` (beta): Various small bug and build fixes, including:
+* 2025-03-28, `v1.9.3`, `v2.2.3`, `v3.0.3` (beta) : Various small bug and build fixes, including:
   fix arm32 pre v7 builds, fix mingw build, get runtime statistics, improve statistic commit counts, 
   fix execution on non BMI1 x64 systems. 
 * 2025-03-06, `v1.9.2`, `v2.2.2`, `v3.0.2-beta`: Various small bug and build fixes. 
@@ -177,7 +177,7 @@ mimalloc is used in various large scale low-latency services and programs, for e
 
 Open `ide/vs2022/mimalloc.sln` in Visual Studio 2022 and build.
 The `mimalloc-lib` project builds a static library (in `out/msvc-x64`), while the
-`mimalloc-override-dll` project builds DLL for overriding malloc
+`mimalloc-override-dll` project builds a DLL for overriding malloc
 in the entire program.
 
 ## Linux, macOS, BSD, etc.

src/arena.c

@@ -1007,17 +1007,17 @@ int mi_reserve_huge_os_pages_interleave(size_t pages, size_t numa_nodes, size_t
   if (pages == 0) return 0;
 
   // pages per numa node
-  size_t numa_count = (numa_nodes > 0 ? numa_nodes : _mi_os_numa_node_count());
+  int numa_count = (numa_nodes > 0 && numa_nodes <= INT_MAX ? (int)numa_nodes : _mi_os_numa_node_count());
-  if (numa_count <= 0) numa_count = 1;
+  if (numa_count == 0) numa_count = 1;
   const size_t pages_per = pages / numa_count;
   const size_t pages_mod = pages % numa_count;
   const size_t timeout_per = (timeout_msecs==0 ? 0 : (timeout_msecs / numa_count) + 50);
 
   // reserve evenly among numa nodes
-  for (size_t numa_node = 0; numa_node < numa_count && pages > 0; numa_node++) {
+  for (int numa_node = 0; numa_node < numa_count && pages > 0; numa_node++) {
     size_t node_pages = pages_per;  // can be 0
-    if (numa_node < pages_mod) node_pages++;
+    if ((size_t)numa_node < pages_mod) node_pages++;
-    int err = mi_reserve_huge_os_pages_at(node_pages, (int)numa_node, timeout_per);
+    int err = mi_reserve_huge_os_pages_at(node_pages, numa_node, timeout_per);
     if (err) return err;
     if (pages < node_pages) {
       pages = 0;

src/os.c

@@ -696,34 +696,47 @@ static void mi_os_free_huge_os_pages(void* p, size_t size) {
   }
 }
 
+
 /* ----------------------------------------------------------------------------
 Support NUMA aware allocation
 -----------------------------------------------------------------------------*/
 
-_Atomic(size_t)  _mi_numa_node_count; // = 0   // cache the node count
+static _Atomic(size_t) mi_numa_node_count; // = 0   // cache the node count
 
-size_t _mi_os_numa_node_count_get(void) {
+int _mi_os_numa_node_count(void) {
-  size_t count = mi_atomic_load_acquire(&_mi_numa_node_count);
+  size_t count = mi_atomic_load_acquire(&mi_numa_node_count);
-  if (count <= 0) {
+  if mi_unlikely(count == 0) {
     long ncount = mi_option_get(mi_option_use_numa_nodes); // given explicitly?
-    if (ncount > 0) {
+    if (ncount > 0 && ncount < INT_MAX) {
       count = (size_t)ncount;
     }
     else {
-      count = _mi_prim_numa_node_count(); // or detect dynamically
+      const size_t n = _mi_prim_numa_node_count(); // or detect dynamically
-      if (count == 0) count = 1;
+      if (n == 0 || n > INT_MAX) { count = 1; }
+                            else { count = n; }
     }
-    mi_atomic_store_release(&_mi_numa_node_count, count); // save it
+    mi_atomic_store_release(&mi_numa_node_count, count); // save it
     _mi_verbose_message("using %zd numa regions\n", count);
   }
-  return count;
+  mi_assert_internal(count > 0 && count <= INT_MAX);
+  return (int)count;
 }
 
-int _mi_os_numa_node_get(void) {
+static int mi_os_numa_node_get(void) {
-  size_t numa_count = _mi_os_numa_node_count();
+  int numa_count = _mi_os_numa_node_count();
   if (numa_count<=1) return 0; // optimize on single numa node systems: always node 0
   // never more than the node count and >= 0
-  size_t numa_node = _mi_prim_numa_node();
+  const size_t n = _mi_prim_numa_node();
+  int numa_node = (n < INT_MAX ? (int)n : 0);
   if (numa_node >= numa_count) { numa_node = numa_node % numa_count; }
-  return (int)numa_node;
+  return numa_node;
+}
+
+int _mi_os_numa_node(void) {
+  if mi_likely(mi_atomic_load_relaxed(&mi_numa_node_count) == 1) { 
+    return 0; 
+  }
+  else {
+    return mi_os_numa_node_get();
+  }
 }

src/prim/unix/prim.c

@@ -31,10 +31,10 @@ terms of the MIT license. A copy of the license can be found in the file
 
 #if defined(__linux__)
   #include <features.h>
-  #include <linux/prctl.h>  // PR_SET_VMA
+  #include <sys/prctl.h>    // THP disable, PR_SET_VMA
-  //#if defined(MI_NO_THP)
+  #if !defined(PR_SET_VMA)
-  #include <sys/prctl.h>    // THP disable
+  #include <linux/prctl.h>
-  //#endif
+  #endif
   #if defined(__GLIBC__)
   #include <linux/mman.h>   // linux mmap flags
   #else
@@ -208,7 +208,7 @@ static int unix_madvise(void* addr, size_t size, int advice) {
 
 static void* unix_mmap_prim(void* addr, size_t size, int protect_flags, int flags, int fd) {
   void* p = mmap(addr, size, protect_flags, flags, fd, 0 /* offset */);
-  #if (defined(__linux__) && defined(PR_SET_VMA))
+  #if defined(__linux__) && defined(PR_SET_VMA)
   if (p!=MAP_FAILED && p!=NULL) {
     prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, p, size, "mimalloc");
   }

src/stats.c

@@ -218,12 +218,14 @@ static void mi_stat_peak_print(const mi_stat_count_t* stat, const char* msg, int
   _mi_fprintf(out, arg, "\n");
 }
 
+#if MI_STAT>1
 static void mi_stat_total_print(const mi_stat_count_t* stat, const char* msg, int64_t unit, mi_output_fun* out, void* arg) {
   _mi_fprintf(out, arg, "%10s:", msg);
   _mi_fprintf(out, arg, "%12s", " ");  // no peak
   mi_print_amount(stat->total, unit, out, arg);
   _mi_fprintf(out, arg, "\n");
 }
+#endif
 
 static void mi_stat_counter_print(const mi_stat_counter_t* stat, const char* msg, mi_output_fun* out, void* arg ) {
   _mi_fprintf(out, arg, "%10s:", msg);

test/fuzz-random-alloc.c

@@ -0,0 +1,158 @@
+#include <mimalloc.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define MAX_ALLOC (1024 * 512)
+#define MAX_COUNT 32
+#define ALLOCATION_POINTERS 1024
+
+#define DEBUG 0
+#define debug_print(fmt, ...) \
+            do { if (DEBUG) fprintf(stderr, fmt, __VA_ARGS__); } while (0)
+
+typedef enum {
+  CALLOC = 0,
+  FREE,
+  MALLOC,
+  MALLOCN,
+  REALLOC,
+  REALLOCF,
+  REALLOCN,
+  ZALLOC,
+  LAST_NOP,
+} allocation_op_t;
+
+typedef struct {
+  uint32_t count;
+  uint32_t size;
+} arg_t;
+
+typedef struct {
+  // The index of the pointer to apply this operation too.
+  uint32_t index;
+  // The arguments to use in the operation.
+  arg_t any_arg;
+  // The type of operation to apply.
+  allocation_op_t type;
+} fuzzing_operation_t;
+
+void debug_print_operation(fuzzing_operation_t *operation) {
+  const char *names[] = {"CALLOC", "FREE", "MALLOC", "MALLOCN", "REALLOC", "REALLOCF", "REALLOCN", "ZALLOC", "LAST_NOP"};
+  debug_print("index: %d, arg.count: %d, arg.size: %d, type: %s\n", operation->index, operation->any_arg.count, operation->any_arg.size, names[operation->type]);
+}
+
+#define FUZZING_OPERATION_DATA_SIZE sizeof(fuzzing_operation_t)
+
+int init_fuzzing_operation(fuzzing_operation_t* out, const uint8_t* fuzzed_data, size_t len) {
+  fuzzing_operation_t result = {0, {0,0},FREE};
+
+  // Return a free operation if we don't have enough data to construct
+  // a full operation.
+  if(sizeof(fuzzing_operation_t) > len) {
+    *out = result;
+    return 0;
+  }
+
+  // Randomly populate operation using fuzzed data.
+  memcpy(&result, fuzzed_data, sizeof(fuzzing_operation_t));
+
+  // Fix up bounds for args and indicies. Randomly copying fuzzed data may result
+  // in out of bounds indicies or the fuzzer trying to allocate way too much data.
+  result.index %= ALLOCATION_POINTERS;
+  result.any_arg.count %= MAX_COUNT;
+  result.any_arg.size %= MAX_ALLOC;
+  result.type = (uint8_t)result.type % (uint8_t)LAST_NOP;
+  *out = result;
+
+  return sizeof(fuzzing_operation_t);
+}
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+  mi_heap_t * heap = mi_heap_new();
+  void* allocation_ptrs[ALLOCATION_POINTERS] = {NULL};
+
+  for(size_t i = 0; i < size; i = i + FUZZING_OPERATION_DATA_SIZE) {
+    fuzzing_operation_t operation = {0, {0,0}, FREE};
+    init_fuzzing_operation(&operation, data + i, size - i);
+
+    debug_print_operation(&operation);
+
+    switch(operation.type) {
+      case CALLOC: 
+        if(allocation_ptrs[operation.index] == NULL) {
+          debug_print("%s\n","CALLOC");
+          allocation_ptrs[operation.index] = mi_heap_calloc(heap, operation.any_arg.count, operation.any_arg.size);
+        } else {
+          debug_print("%s\n","CALLOC conditions not met");
+        }
+        break;
+      case FREE:
+        // Can be ptr or be NULL so we don't need to check first.
+        mi_free(allocation_ptrs[operation.index]);
+        allocation_ptrs[operation.index] = NULL;
+        break;
+      case MALLOC:
+        if(allocation_ptrs[operation.index] == NULL){
+          debug_print("%s\n","MALLOC");
+          allocation_ptrs[operation.index] = mi_heap_malloc(heap, operation.any_arg.size);
+        } else {
+          debug_print("%s\n","MALLOC conditions not met");
+        }
+        break;
+      case MALLOCN:
+        if(allocation_ptrs[operation.index] == NULL){
+          debug_print("%s\n","MALLOCN");
+        allocation_ptrs[operation.index] = mi_heap_mallocn(heap, operation.any_arg.count, operation.any_arg.size);
+        } else {
+          debug_print("%s\n","MALLOCN conditions not met");
+        }
+        break;
+      case REALLOC:
+        if(allocation_ptrs[operation.index] != NULL){
+          debug_print("%s\n","REALLOC");
+          allocation_ptrs[operation.index] = mi_heap_realloc(heap, allocation_ptrs[operation.index], operation.any_arg.size);
+        } else {
+          debug_print("%s\n","REALLOC conditions not met");
+        }
+        break;
+      case REALLOCN:
+        if(allocation_ptrs[operation.index] != NULL){
+          debug_print("%s\n","REALLOCN");
+          allocation_ptrs[operation.index] = mi_heap_reallocn(heap, allocation_ptrs[operation.index], operation.any_arg.count, operation.any_arg.size);
+        } else {
+          debug_print("%s\n","REALLOCN conditions not met");
+        }
+        break;
+      case REALLOCF:
+        if(allocation_ptrs[operation.index] != NULL){
+          debug_print("%s\n","REALLOCF");
+          allocation_ptrs[operation.index] = mi_heap_reallocf(heap, allocation_ptrs[operation.index], operation.any_arg.size);
+        } else {
+          debug_print("%s\n","REALLOCF conditions not met");
+        }        
+        break;
+      case ZALLOC:
+        if(allocation_ptrs[operation.index] == NULL){
+          debug_print("%s\n","ZALLOC");
+         allocation_ptrs[operation.index] = mi_heap_zalloc(heap, operation.any_arg.size);
+        } else {
+          debug_print("%s\n","ZALLOC conditions not met");
+        }
+        break;
+      case LAST_NOP:
+        // No-op
+        break;
+      default:
+        mi_heap_destroy(heap);
+        exit(1);
+        break;
+    }
+  }
+  mi_heap_destroy(heap);
+  return 0;
+}