Sync upstream dev3 (2026-09-12, 636510a3, v3.5.2)

.github/dependabot.yaml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    groups:
+      minor-and-patch:
+        patterns: ["*"]
+        update-types: ["minor", "patch"]

.github/workflows/release.yaml

@@ -9,7 +9,7 @@ permissions:
   contents: write
 
 env:
-  RELEASE: Release v3.4.5
+  RELEASE: Release v3.5.2
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 name: Release
@@ -19,14 +19,14 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        branch: [v3.4.5, v2.4.5, v1.9.15]  # [dev,dev2,dev3]
+        branch: [v3.5.2, v2.5.2, v1.15.2]  # [dev,dev2,dev3]
         # we build on the oldest ubuntu version for better binary compatibility.
         os: [windows-latest, macOS-latest, macos-15-intel, ubuntu-22.04, ubuntu-22.04-arm]  
 
     steps:
       # Checkout: https://github.com/actions/checkout
       - name: Checkout repository
-        uses: actions/checkout@d23441a48e516b6c34aea4fa41551a30e30af803 # v6.1.0
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
           ref: ${{ matrix.branch }}
           fetch-tags: true
@@ -45,7 +45,7 @@ jobs:
 
       # Create a release: https://github.com/softprops/action-gh-release (MIT license)
       - name: Release
-        uses: softprops/action-gh-release@3d0d9888cb7fd7b750713d6e236d1fcb99157228 # v3.0.2
+        uses: softprops/action-gh-release@efb35369e0ad2afab669f228072c1b0d510eae64 # v3.0.3
         if: ${{ env.RELEASE != '' && env.RELEASE != 'no' }} 
         with:
           name: ${{ env.RELEASE }}

.github/workflows/stale.yaml

@@ -1,7 +1,7 @@
 on:
   workflow_dispatch:       # allow running the workflow manually   
   schedule:
-    - cron: "15 21 * * *"  # minute, hour, day (1-31), month (1-12), day of the week (0 - 6 or SUN-SAT)
+    - cron: "01 21 * * *"  # minute, hour, day (1-31), month (1-12), day of the week (0 - 6 or SUN-SAT)
 
 name: Close inactive issues
 jobs:
@@ -11,7 +11,7 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/stale@1e223db275d687790206a7acac4d1a11bd6fe629 # v10.4.0
+      - uses: actions/stale@4391f3da665fdf50b6810c1a66712fb9ba21aa93 # v11.0.0
         with:
           days-before-issue-stale: 360
           days-before-issue-close: 14

azure-pipelines.yml

@@ -127,7 +127,7 @@ jobs:
         CC: clang
         CXX: clang++
         BuildType: debug-asan-clang
-        cmakeExtraArgs: -DCMAKE_BUILD_TYPE=Debug -DMI_DEBUG_FULL=ON -DMI_TRACK_ASAN=ON
+        cmakeExtraArgs: -DCMAKE_BUILD_TYPE=RelWithDebInfo -DMI_TRACK_ASAN=ON
       Debug UBSAN Clang:
         CC: clang
         CXX: clang++
@@ -156,6 +156,7 @@ jobs:
     displayName: CTest
     env:
       MIMALLOC_GUARDED_SAMPLE_RATE: 1000
+      MIMALLOC_VERBOSE: 2
 #  - upload: $(Build.SourcesDirectory)/$(BuildType)
 #    artifact: mimalloc-ubuntu-$(BuildType)
 
@@ -188,6 +189,7 @@ jobs:
   - script: ctest --verbose --timeout 240
     workingDirectory: $(BuildType)
     displayName: CTest
+
 #  - upload: $(Build.SourcesDirectory)/$(BuildType)
 #    artifact: mimalloc-macos-$(BuildType)
 

cmake/mimalloc-config-version.cmake

@@ -1,6 +1,6 @@
 set(mi_version_major 3)
 set(mi_version_minor 5)
-set(mi_version_patch 0)
+set(mi_version_patch 2)
 set(mi_version ${mi_version_major}.${mi_version_minor})
 
 set(PACKAGE_VERSION ${mi_version})

contrib/vcpkg/portfile.cmake

@@ -3,7 +3,7 @@ vcpkg_from_github(
   REPO microsoft/mimalloc
   HEAD_REF master
 
-  # The "REF" can be a commit hash, branch name (dev3), or a version (v3.5.0).
+  # The "REF" can be a commit hash, branch name (dev3), or a version (v3.5.1).
   REF "v${VERSION}"
 
   # The sha512 is the hash of the tar.gz bundle.

contrib/vcpkg/vcpkg.json

@@ -1,6 +1,6 @@
 {
   "name": "mimalloc",
-  "version": "3.5.0",
+  "version": "3.5.1",
   "port-version": 0,
   "description": "Compact general purpose allocator with excellent performance",
   "homepage": "https://github.com/microsoft/mimalloc",

doc/mimalloc-doc.h

@@ -124,9 +124,18 @@ Further information:
 
 /// Free previously allocated memory.
 /// The pointer `p` must have been allocated before (or be \a NULL).
-/// @param p  pointer to free, or \a NULL.
+/// @param p  pointer to the block that is freed, or \a NULL.
+/// See also mi_cfree() for a checked free that validates the pointer 
+/// before free-ing.
+/// @see mi_cfree()
 void  mi_free(void* p);
 
+/// Checked `free`: just as mi_free() but always checks if the pointer `p` belongs to our heap
+/// @param p  pointer to a block that is freed, or any other arbitrary pointer.
+/// This is safe to use when a pointer might be invalid or allocated by 
+/// another allocator (in which case the pointer is ignored and not freed).
+void  mi_cfree(void* p);
+
 /// Allocate \a size bytes.
 /// @param size  number of bytes to allocate.
 /// @returns pointer to the allocated memory or \a NULL if out of memory.
@@ -404,19 +413,20 @@ void* mi_realloc_aligned_at(void* p, size_t newsize, size_t alignment, size_t of
 /// \}
 
 /// \defgroup constantsize Constant size allocation
-/// Constant size allocation and freeing
+/// Inlined definitions for onstant size allocation and freeing.
+/// If the size is constant, it can pick statically between
+/// mi_malloc() and mi_malloc_small().
 /// For example:
 /// ```
 /// long* p = (long*)mi_malloc_csize(sizeof(long))
 /// ```
-/// On __v3__ these can improve performance as they will statically
-/// use mi_malloc_small(), mi_free_small(), etc. when possible.
+/// On __v3__ these can improve performance.
 /// This is especially useful for compilers and runtimes where the
 /// the size is often statically known. These functions can be used
 /// even when the size is not constant but then there is no performance benefit.
 /// \{
 
-/// @brief Allocate a constant size object.
+/// @brief __v3__: Allocate a constant size object.
 /// @param size A (compile-time) constant size.
 /// @return A pointer to an allocated block of size \a size bytes.
 /// @see mi_free_csize()
@@ -429,13 +439,22 @@ void* mi_theap_malloc_csize(mi_theap_t* theap, size_t size);
 
 void* mi_theap_zalloc_csize(mi_theap_t* theap, size_t size);
 
-/// @brief Free a pointer with a known constant size.
+/// @brief __v3__: Free a pointer with a known constant size.
 /// @param p The pointer to the allocated block (or \a NULL )
-/// @param size The (compile time constant) size with which the pointer was allocated.
+/// @param size The size with which the pointer was allocated.
 /// @see mi_malloc_csize()
 /// @see mi_free_size()
+/// @see mi_free_size_nonnull()
 void mi_free_csize(void* p, size_t size);
 
+/// @brief __v3__: Free a non-null pointer with a known constant size.
+/// @param p The pointer to the allocated block (cannot be \a NULL !)
+/// @param size The size with which the pointer was allocated.
+/// @see mi_malloc_csize()
+/// @see mi_free_size()
+/// @see mi_free_size_nonnull()
+void mi_free_csize_nonnull(void* p, size_t size);
+
 /// \}
 
 /// \defgroup zeroinit Zero initialized re-allocation
@@ -1056,12 +1075,13 @@ void* mi_zalloc_small(size_t size);
 
 /// __v3__: Can be used to free an object that was allocated with mi_malloc_small() or 
 /// any allocation with a size < MI_SMALL_SIZE_MAX()
-/// @param p Pointer that was returned from #mi_malloc_small et al.
+/// @param p Pointer that was returned from #mi_malloc_small et al. (or \a NULL )
 /// @details
 /// This function is meant for use in run-time systems for best
 /// performance and does not check if the pointer was _indeed_ allocated
 /// as a small object -- use with care!
 ///
+/// @see mi_free_small_nonnull()
 /// @see mi_malloc_small()
 /// @see mi_zalloc_small()
 /// @see mi_heap_malloc_small()
@@ -1070,6 +1090,23 @@ void* mi_zalloc_small(size_t size);
 /// @see mi_theap_zalloc_small()
 void mi_free_small(void* p);
 
+/// __v3__: Can be used to free an object that was allocated with mi_malloc_small() or 
+/// any allocation with a size < MI_SMALL_SIZE_MAX()
+/// @param p Pointer that was returned from #mi_malloc_small et al. Cannot be \a NULL !
+/// @details
+/// This function is meant for use in run-time systems for best
+/// performance and does not check if the pointer was _indeed_ allocated
+/// as a small object or not NULL -- use with care!
+///
+/// @see mi_free_small()
+/// @see mi_malloc_small()
+/// @see mi_zalloc_small()
+/// @see mi_heap_malloc_small()
+/// @see mi_heap_zalloc_small()
+/// @see mi_theap_malloc_small()
+/// @see mi_theap_zalloc_small()
+void mi_free_small_nonnull(void* p);
+
 /// \}
 
 
@@ -1406,9 +1443,6 @@ void* mi_theap_realloc(mi_theap_t* theap, void* p, size_t newsize);
 ///
 /// \{
 
-/// Checked `free`: just as `mi_free` but always checks if the pointer `p` belongs to our heap
-/// and is safe to use when a pointer might be invalid or allocated by another allocator.
-void  mi_cfree(void* p);
 void* mi__expand(void* p, size_t newsize);
 
 size_t mi_malloc_size(const void* p);
@@ -1437,15 +1471,25 @@ int   mi_reallocarr(void* p, size_t count, size_t size);
 void* mi_aligned_recalloc(void* p, size_t newcount, size_t size, size_t alignment);
 void* mi_aligned_offset_recalloc(void* p, size_t newcount, size_t size, size_t alignment, size_t offset);
 
-/// @brief Free an object that was allocated with a known size.
+/// @brief Free a block that was allocated with a known size.
 /// @param p The pointer that was allocated with \a size bytes (or \a NULL )
 /// @param size The size in bytes.
-/// __v3__: this can improve performance for objects with a \size < MI_SMALL_SIZE_MAX()
+/// __v3__: this can improve performance for objects with a \a size < MI_SMALL_SIZE_MAX()
 /// as it will use mi_free_small() internally. Always use this if possible.
 /// @see mi_free_tp()
 /// @see mi_free_csize()
+/// @see mi_free_size_nonnull()
 void mi_free_size(void* p, size_t size);
 
+/// @brief Free a non-NULL pointer that was allocated with a known size.
+/// @param p The pointer that was allocated with \a size bytes (cannot be \a NULL !)
+/// @param size The size in bytes.
+/// __v3__: this can improve performance for objects with a \a size < MI_SMALL_SIZE_MAX()
+/// as it will use mi_free_small_nonnull() internally. Always use this if possible.
+/// @see mi_free_tp()
+/// @see mi_free_csize()
+void mi_free_size_nonnull(void* p, size_t size);
+
 /// @brief Free an object that was allocated aligned.
 /// @param p The pointer to the object (or \a NULL )
 /// @param size The size of the object as allocated.

doc/release-notes.md

@@ -1,7 +1,7 @@
 Binary and source releases for mimalloc.
 
-- __v3__: recommended: latest mimalloc design that tends to use less memory then v2 but should perform similarly.
-- __v2__: stable: most widely used.
+- __v3__: recommended: latest mimalloc design that tends to use less memory then v2.
+- __v2__: stable legacy.
 - __v1__: legacy.
 
 Notes:
@@ -10,6 +10,6 @@ Notes:
 - Generally it is recommended to download sources (or use `vcpkg` etc.) and build mimalloc as 
   part of your project.
 - Source releases can also be downloaded directly from github by the tag.  
-  For example <https://github.com/microsoft/mimalloc/archive/v3.4.0.tar.gz>.  
+  For example <https://github.com/microsoft/mimalloc/archive/v3.5.1.tar.gz>.  
 - Binary releases include a release-, debug-, and secure build.
 - Linux binaries are built on Ubuntu 22.

docs/annotated.html

@@ -34,7 +34,7 @@
  <tr id="projectrow">
   <td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
+   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.5/2.5/1.15</span>
    </div>
   </td>
     <td>        <div id="MSearchBox" class="MSearchBoxInactive">

docs/bench.html

@@ -34,7 +34,7 @@
  <tr id="projectrow">
   <td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
+   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.5/2.5/1.15</span>
    </div>
   </td>
     <td>        <div id="MSearchBox" class="MSearchBoxInactive">

docs/build.html

@@ -34,7 +34,7 @@
  <tr id="projectrow">
   <td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
+   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.5/2.5/1.15</span>
    </div>
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docs/classes.html

@@ -34,7 +34,7 @@
  <tr id="projectrow">
   <td id="projectlogo"><img alt="Logo" src="mimalloc-logo.svg"/></td>
   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
+   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.5/2.5/1.15</span>
    </div>
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docs/doxygen_crawl.html

@@ -98,6 +98,7 @@
 <a href="group__constantsize.html"/>
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 <a href="group__constantsize.html#ga1addf755829380581dd9c3c9175e376f"/>
+<a href="group__constantsize.html#ga38a93d373a9dc8edc8bca83edb6af5c5"/>
 <a href="group__constantsize.html#ga7a421e302074e598527c3eb052a6a3c5"/>
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 <a href="group__constantsize.html#gadca6d340ee15b5c70695ed82d95c6cec"/>
@@ -113,6 +114,7 @@
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 <a href="group__extended.html#ga1ea64283508718d9d645c38efc2f4305"/>
+<a href="group__extended.html#ga22890f54e5be433837069c8e97fdf379"/>
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@@ -174,6 +176,7 @@
 <a href="group__malloc.html#ga4dc3a4067037b151a64629fe8a332641"/>
 <a href="group__malloc.html#ga61f46bade3db76ca24aaafedc40de7b6"/>
 <a href="group__malloc.html#ga6686568014b54d1e6c7ac64a076e4f56"/>
+<a href="group__malloc.html#ga705dc7a64bffacfeeb0141501a5c35d7"/>
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docs/environment.html

@@ -34,7 +34,7 @@
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   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
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docs/functions.html

@@ -34,7 +34,7 @@
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   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
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docs/functions_vars.html

@@ -34,7 +34,7 @@
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   <td id="projectalign">
-   <div id="projectname">mi-malloc<span id="projectnumber">&#160;3.4/2.4/1.9</span>
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docs/group__aligned.html

@@ -34,7 +34,7 @@
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docs/group__analysis.html

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