Added function vmaResizeAllocation.

Added tests: function TestResize. Bumped CSV recording file format version to 1.4.

docs/Recording file format.md

@@ -23,7 +23,7 @@ Formats with only minor version incremented are backward compatible.
 VmaReplay application supports all older versions.
 Current version is:
 
-    1,3
+    1,4
 
 # Configuration
 
@@ -204,6 +204,11 @@ No parameters.
 
 - pool : pointer
 
+**vmaResizeAllocation** (min format version: 1.4)
+
+- allocation : pointer
+- newSize : uint64
+
 # Data types
 
 **bool**
@@ -228,7 +233,7 @@ It should not contain end-of-line characters - results are then undefined.
 # Example file
 
     Vulkan Memory Allocator,Calls recording
-    1,3
+    1,4
     Config,Begin
     PhysicalDevice,apiVersion,4198477
     PhysicalDevice,driverVersion,8388653

docs/html/globals.html

@@ -316,7 +316,7 @@ $(function() {
 : <a class="el" href="vk__mem__alloc_8h.html#ad63b2113c0bfdbeade1cb498f5a8580d">vk_mem_alloc.h</a>
 </li>
 <li>VmaPoolCreateFlagBits
-: <a class="el" href="vk__mem__alloc_8h.html#a9a7c45f9c863695d98c83fa5ac940fe7">vk_mem_alloc.h</a>
+: <a class="el" href="vk__mem__alloc_8h.html#a8f93195158e0e2ac80ca352064e71c1f">vk_mem_alloc.h</a>
 </li>
 <li>VmaPoolCreateFlags
 : <a class="el" href="vk__mem__alloc_8h.html#a2770e325ea42e087c1b91fdf46d0292a">vk_mem_alloc.h</a>
@@ -336,6 +336,9 @@ $(function() {
 <li>VmaRecordSettings
 : <a class="el" href="vk__mem__alloc_8h.html#a0ab61e87ff6365f1d59915eadc37a9f0">vk_mem_alloc.h</a>
 </li>
+<li>vmaResizeAllocation()
+: <a class="el" href="vk__mem__alloc_8h.html#a0ff488958ca72b28e545880463cb8696">vk_mem_alloc.h</a>
+</li>
 <li>vmaSetAllocationUserData()
 : <a class="el" href="vk__mem__alloc_8h.html#af9147d31ffc11d62fc187bde283ed14f">vk_mem_alloc.h</a>
 </li>

docs/html/globals_func.html

@@ -163,6 +163,9 @@ $(function() {
 <li>vmaMapMemory()
 : <a class="el" href="vk__mem__alloc_8h.html#ad5bd1243512d099706de88168992f069">vk_mem_alloc.h</a>
 </li>
+<li>vmaResizeAllocation()
+: <a class="el" href="vk__mem__alloc_8h.html#a0ff488958ca72b28e545880463cb8696">vk_mem_alloc.h</a>
+</li>
 <li>vmaSetAllocationUserData()
 : <a class="el" href="vk__mem__alloc_8h.html#af9147d31ffc11d62fc187bde283ed14f">vk_mem_alloc.h</a>
 </li>

docs/html/search/all_10.js

@@ -107,6 +107,7 @@ var searchData=
   ['vmarecordflagbits',['VmaRecordFlagBits',['../vk__mem__alloc_8h.html#a4dd2c44642312a147a4e93373a6e64d2',1,'VmaRecordFlagBits(): vk_mem_alloc.h'],['../vk__mem__alloc_8h.html#ade20b626a6635ce1bf30ea53dea774e4',1,'VmaRecordFlagBits(): vk_mem_alloc.h']]],
   ['vmarecordflags',['VmaRecordFlags',['../vk__mem__alloc_8h.html#af3929a1a4547c592fc0b0e55ef452828',1,'vk_mem_alloc.h']]],
   ['vmarecordsettings',['VmaRecordSettings',['../struct_vma_record_settings.html',1,'VmaRecordSettings'],['../vk__mem__alloc_8h.html#a0ab61e87ff6365f1d59915eadc37a9f0',1,'VmaRecordSettings(): vk_mem_alloc.h']]],
+  ['vmaresizeallocation',['vmaResizeAllocation',['../vk__mem__alloc_8h.html#a0ff488958ca72b28e545880463cb8696',1,'vk_mem_alloc.h']]],
   ['vmasetallocationuserdata',['vmaSetAllocationUserData',['../vk__mem__alloc_8h.html#af9147d31ffc11d62fc187bde283ed14f',1,'vk_mem_alloc.h']]],
   ['vmasetcurrentframeindex',['vmaSetCurrentFrameIndex',['../vk__mem__alloc_8h.html#ade56bf8dc9f5a5eaddf5f119ed525236',1,'vk_mem_alloc.h']]],
   ['vmastatinfo',['VmaStatInfo',['../struct_vma_stat_info.html',1,'VmaStatInfo'],['../vk__mem__alloc_8h.html#a810b009a788ee8aac72a25b42ffbe31c',1,'VmaStatInfo(): vk_mem_alloc.h']]],

docs/html/search/functions_0.js

@@ -33,6 +33,7 @@ var searchData=
   ['vmainvalidateallocation',['vmaInvalidateAllocation',['../vk__mem__alloc_8h.html#a0d0eb0c1102268fa9a476d12ecbe4006',1,'vk_mem_alloc.h']]],
   ['vmamakepoolallocationslost',['vmaMakePoolAllocationsLost',['../vk__mem__alloc_8h.html#a736bd6cbda886f36c891727e73bd4024',1,'vk_mem_alloc.h']]],
   ['vmamapmemory',['vmaMapMemory',['../vk__mem__alloc_8h.html#ad5bd1243512d099706de88168992f069',1,'vk_mem_alloc.h']]],
+  ['vmaresizeallocation',['vmaResizeAllocation',['../vk__mem__alloc_8h.html#a0ff488958ca72b28e545880463cb8696',1,'vk_mem_alloc.h']]],
   ['vmasetallocationuserdata',['vmaSetAllocationUserData',['../vk__mem__alloc_8h.html#af9147d31ffc11d62fc187bde283ed14f',1,'vk_mem_alloc.h']]],
   ['vmasetcurrentframeindex',['vmaSetCurrentFrameIndex',['../vk__mem__alloc_8h.html#ade56bf8dc9f5a5eaddf5f119ed525236',1,'vk_mem_alloc.h']]],
   ['vmatouchallocation',['vmaTouchAllocation',['../vk__mem__alloc_8h.html#a43d8ba9673c846f049089a5029d5c73a',1,'vk_mem_alloc.h']]],

docs/html/vk__mem__alloc_8h.html

@@ -310,6 +310,9 @@ Functions</h2></td></tr>
 <tr class="memitem:a11f0fbc034fa81a4efedd73d61ce7568"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="vk__mem__alloc_8h.html#a11f0fbc034fa81a4efedd73d61ce7568">vmaFreeMemory</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_allocation.html">VmaAllocation</a> allocation)</td></tr>
 <tr class="memdesc:a11f0fbc034fa81a4efedd73d61ce7568"><td class="mdescLeft">&#160;</td><td class="mdescRight">Frees memory previously allocated using <a class="el" href="vk__mem__alloc_8h.html#abf28077dbf82d0908b8acbe8ee8dd9b8" title="General purpose memory allocation. ">vmaAllocateMemory()</a>, <a class="el" href="vk__mem__alloc_8h.html#a7fdf64415b6c3d83c454f28d2c53df7b">vmaAllocateMemoryForBuffer()</a>, or <a class="el" href="vk__mem__alloc_8h.html#a0faa3f9e5fb233d29d1e00390650febb" title="Function similar to vmaAllocateMemoryForBuffer(). ">vmaAllocateMemoryForImage()</a>.  <a href="#a11f0fbc034fa81a4efedd73d61ce7568">More...</a><br /></td></tr>
 <tr class="separator:a11f0fbc034fa81a4efedd73d61ce7568"><td class="memSeparator" colspan="2">&#160;</td></tr>
+<tr class="memitem:a0ff488958ca72b28e545880463cb8696"><td class="memItemLeft" align="right" valign="top">VkResult&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="vk__mem__alloc_8h.html#a0ff488958ca72b28e545880463cb8696">vmaResizeAllocation</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_allocation.html">VmaAllocation</a> allocation, VkDeviceSize newSize)</td></tr>
+<tr class="memdesc:a0ff488958ca72b28e545880463cb8696"><td class="mdescLeft">&#160;</td><td class="mdescRight">Tries to resize an allocation in place, if there is enough free memory after it.  <a href="#a0ff488958ca72b28e545880463cb8696">More...</a><br /></td></tr>
+<tr class="separator:a0ff488958ca72b28e545880463cb8696"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a86dd08aba8633bfa4ad0df2e76481d8b"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="vk__mem__alloc_8h.html#a86dd08aba8633bfa4ad0df2e76481d8b">vmaGetAllocationInfo</a> (<a class="el" href="struct_vma_allocator.html">VmaAllocator</a> allocator, <a class="el" href="struct_vma_allocation.html">VmaAllocation</a> allocation, <a class="el" href="struct_vma_allocation_info.html">VmaAllocationInfo</a> *pAllocationInfo)</td></tr>
 <tr class="memdesc:a86dd08aba8633bfa4ad0df2e76481d8b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns current information about specified allocation and atomically marks it as used in current frame.  <a href="#a86dd08aba8633bfa4ad0df2e76481d8b">More...</a><br /></td></tr>
 <tr class="separator:a86dd08aba8633bfa4ad0df2e76481d8b"><td class="memSeparator" colspan="2">&#160;</td></tr>
@@ -2364,6 +2367,50 @@ Functions</h2></td></tr>
 <p>This function fails when used on allocation made in memory type that is not <code>HOST_VISIBLE</code>.</p>
 <p>This function always fails when called for allocation that was created with <a class="el" href="vk__mem__alloc_8h.html#ad9889c10c798b040d59c92f257cae597a5f436af6c8fe8540573a6d22627a6fd2">VMA_ALLOCATION_CREATE_CAN_BECOME_LOST_BIT</a> flag. Such allocations cannot be mapped. </p>
 
+</div>
+</div>
+<a id="a0ff488958ca72b28e545880463cb8696"></a>
+<h2 class="memtitle"><span class="permalink"><a href="#a0ff488958ca72b28e545880463cb8696">&#9670;&nbsp;</a></span>vmaResizeAllocation()</h2>
+
+<div class="memitem">
+<div class="memproto">
+      <table class="memname">
+        <tr>
+          <td class="memname">VkResult vmaResizeAllocation </td>
+          <td>(</td>
+          <td class="paramtype"><a class="el" href="struct_vma_allocator.html">VmaAllocator</a>&#160;</td>
+          <td class="paramname"><em>allocator</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype"><a class="el" href="struct_vma_allocation.html">VmaAllocation</a>&#160;</td>
+          <td class="paramname"><em>allocation</em>, </td>
+        </tr>
+        <tr>
+          <td class="paramkey"></td>
+          <td></td>
+          <td class="paramtype">VkDeviceSize&#160;</td>
+          <td class="paramname"><em>newSize</em>&#160;</td>
+        </tr>
+        <tr>
+          <td></td>
+          <td>)</td>
+          <td></td><td></td>
+        </tr>
+      </table>
+</div><div class="memdoc">
+
+<p>Tries to resize an allocation in place, if there is enough free memory after it. </p>
+<p>Tries to change allocation's size without moving or reallocating it. You can both shrink and grow allocation size. When growing, it succeeds only when the allocation belongs to a memory block with enough free space after it.</p>
+<p>Returns <code>VK_SUCCESS</code> if allocation's size has been successfully changed. Returns <code>VK_ERROR_OUT_OF_POOL_MEMORY</code> if allocation's size could not be changed.</p>
+<p>After successful call to this function, <a class="el" href="struct_vma_allocation_info.html#aac76d113a6a5ccbb09fea00fb25fd18f" title="Size of this allocation, in bytes. ">VmaAllocationInfo::size</a> of this allocation changes. All other parameters stay the same: memory pool and type, alignment, offset, mapped pointer.</p>
+<ul>
+<li>Calling this function on allocation that is in lost state fails with result <code>VK_ERROR_VALIDATION_FAILED_EXT</code>.</li>
+<li>Calling this function with <code>newSize</code> same as current allocation size does nothing and returns <code>VK_SUCCESS</code>.</li>
+<li>Resizing dedicated allocations, as well as allocations created in pools that use linear or buddy algorithm, is not supported. The function returns <code>VK_ERROR_FEATURE_NOT_PRESENT</code> in such cases. Support may be added in the future. </li>
+</ul>
+
 </div>
 </div>
 <a id="af9147d31ffc11d62fc187bde283ed14f"></a>

src/Tests.cpp

@@ -2711,6 +2711,159 @@ static void TestPool_SameSize()
     vmaDestroyPool(g_hAllocator, pool);
 }
 
+static void TestResize()
+{
+    wprintf(L"Testing vmaResizeAllocation...\n");
+
+    const VkDeviceSize KILOBYTE = 1024ull;
+    const VkDeviceSize MEGABYTE = KILOBYTE * 1024;
+
+    VkBufferCreateInfo bufCreateInfo = { VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO };
+    bufCreateInfo.size = 2 * MEGABYTE;
+    bufCreateInfo.usage = VK_BUFFER_USAGE_TRANSFER_SRC_BIT;
+
+    VmaAllocationCreateInfo allocCreateInfo = {};
+    allocCreateInfo.usage = VMA_MEMORY_USAGE_CPU_ONLY;
+    
+    uint32_t memTypeIndex = UINT32_MAX;
+    TEST( vmaFindMemoryTypeIndexForBufferInfo(g_hAllocator, &bufCreateInfo, &allocCreateInfo, &memTypeIndex) == VK_SUCCESS );
+
+    VmaPoolCreateInfo poolCreateInfo = {};
+    poolCreateInfo.flags = VMA_POOL_CREATE_IGNORE_BUFFER_IMAGE_GRANULARITY_BIT;
+    poolCreateInfo.blockSize = 8 * MEGABYTE;
+    poolCreateInfo.minBlockCount = 1;
+    poolCreateInfo.maxBlockCount = 1;
+    poolCreateInfo.memoryTypeIndex = memTypeIndex;
+
+    VmaPool pool;
+    TEST( vmaCreatePool(g_hAllocator, &poolCreateInfo, &pool) == VK_SUCCESS );
+
+    allocCreateInfo.pool = pool;
+
+    // Fill 8 MB pool with 4 * 2 MB allocations.
+    VmaAllocation allocs[4] = {};
+
+    VkMemoryRequirements memReq = {};
+    memReq.memoryTypeBits = UINT32_MAX;
+    memReq.alignment = 4;
+    memReq.size = bufCreateInfo.size;
+
+    VmaAllocationInfo allocInfo = {};
+
+    for(uint32_t i = 0; i < 4; ++i)
+    {
+        TEST( vmaAllocateMemory(g_hAllocator, &memReq, &allocCreateInfo, &allocs[i], nullptr) == VK_SUCCESS );
+    }
+
+    // Now it's: a0 2MB, a1 2MB, a2 2MB, a3 2MB
+
+    // Case: Resize to the same size always succeeds.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[0], 2 * MEGABYTE) == VK_SUCCESS);
+        vmaGetAllocationInfo(g_hAllocator, allocs[3], &allocInfo);
+        TEST(allocInfo.size == 2ull * 1024 * 1024);
+    }
+
+    // Case: Shrink allocation at the end.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[3], 1 * MEGABYTE) == VK_SUCCESS );
+        vmaGetAllocationInfo(g_hAllocator, allocs[3], &allocInfo);
+        TEST(allocInfo.size == 1ull * 1024 * 1024);
+    }
+    
+    // Now it's: a0 2MB, a1 2MB, a2 2MB, a3 1MB, free 1MB
+
+    // Case: Shrink allocation before free space.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[3], 512 * KILOBYTE) == VK_SUCCESS );
+        vmaGetAllocationInfo(g_hAllocator, allocs[3], &allocInfo);
+        TEST(allocInfo.size == 512 * KILOBYTE);
+    }
+
+    // Now it's: a0 2MB, a1 2MB, a2 2MB, a3 0.5MB, free 1.5MB
+
+    // Case: Shrink allocation before next allocation.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[0], 1 * MEGABYTE) == VK_SUCCESS );
+        vmaGetAllocationInfo(g_hAllocator, allocs[0], &allocInfo);
+        TEST(allocInfo.size == 1 * MEGABYTE);
+    }
+
+    // Now it's: a0 1MB, free 1 MB, a1 2MB, a2 2MB, a3 0.5MB, free 1.5MB
+
+    // Case: Grow allocation while there is even more space available.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[3], 1 * MEGABYTE) == VK_SUCCESS );
+        vmaGetAllocationInfo(g_hAllocator, allocs[3], &allocInfo);
+        TEST(allocInfo.size == 1 * MEGABYTE);
+    }
+
+    // Now it's: a0 1MB, free 1 MB, a1 2MB, a2 2MB, a3 1MB, free 1MB
+
+    // Case: Grow allocation while there is exact amount of free space available.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[0], 2 * MEGABYTE) == VK_SUCCESS );
+        vmaGetAllocationInfo(g_hAllocator, allocs[0], &allocInfo);
+        TEST(allocInfo.size == 2 * MEGABYTE);
+    }
+
+    // Now it's: a0 2MB, a1 2MB, a2 2MB, a3 1MB, free 1MB
+
+    // Case: Fail to grow when there is not enough free space due to next allocation.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[0], 3 * MEGABYTE) == VK_ERROR_OUT_OF_POOL_MEMORY );
+        vmaGetAllocationInfo(g_hAllocator, allocs[0], &allocInfo);
+        TEST(allocInfo.size == 2 * MEGABYTE);
+    }
+
+    // Case: Fail to grow when there is not enough free space due to end of memory block.
+    {
+        TEST( vmaResizeAllocation(g_hAllocator, allocs[3], 3 * MEGABYTE) == VK_ERROR_OUT_OF_POOL_MEMORY );
+        vmaGetAllocationInfo(g_hAllocator, allocs[3], &allocInfo);
+        TEST(allocInfo.size == 1 * MEGABYTE);
+    }
+
+    for(uint32_t i = 4; i--; )
+    {
+        vmaFreeMemory(g_hAllocator, allocs[i]);
+    }
+
+    vmaDestroyPool(g_hAllocator, pool);
+
+    // Test dedicated allocation
+    {
+        VmaAllocationCreateInfo dedicatedAllocCreateInfo = {};
+        dedicatedAllocCreateInfo.usage = VMA_MEMORY_USAGE_CPU_ONLY;
+        dedicatedAllocCreateInfo.flags = VMA_ALLOCATION_CREATE_DEDICATED_MEMORY_BIT;
+
+        VmaAllocation dedicatedAlloc = VK_NULL_HANDLE;
+        TEST( vmaAllocateMemory(g_hAllocator, &memReq, &dedicatedAllocCreateInfo, &dedicatedAlloc, nullptr) == VK_SUCCESS );
+
+        // Case: Resize to the same size always succeeds.
+        {
+            TEST( vmaResizeAllocation(g_hAllocator, dedicatedAlloc, 2 * MEGABYTE) == VK_SUCCESS);
+            vmaGetAllocationInfo(g_hAllocator, dedicatedAlloc, &allocInfo);
+            TEST(allocInfo.size == 2ull * 1024 * 1024);
+        }
+
+        // Case: Shrinking fails.
+        {
+            TEST( vmaResizeAllocation(g_hAllocator, dedicatedAlloc, 1 * MEGABYTE) < VK_SUCCESS);
+            vmaGetAllocationInfo(g_hAllocator, dedicatedAlloc, &allocInfo);
+            TEST(allocInfo.size == 2ull * 1024 * 1024);
+        }
+
+        // Case: Growing fails.
+        {
+            TEST( vmaResizeAllocation(g_hAllocator, dedicatedAlloc, 3 * MEGABYTE) < VK_SUCCESS);
+            vmaGetAllocationInfo(g_hAllocator, dedicatedAlloc, &allocInfo);
+            TEST(allocInfo.size == 2ull * 1024 * 1024);
+        }
+
+        vmaFreeMemory(g_hAllocator, dedicatedAlloc);
+    }
+}
+
 static bool ValidatePattern(const void* pMemory, size_t size, uint8_t pattern)
 {
     const uint8_t* pBytes = (const uint8_t*)pMemory;
@@ -4275,7 +4428,7 @@ void Test()
         // ########################################
         // ########################################
         
-        BasicTestBuddyAllocator();
+        TestResize();
         return;
     }
 
@@ -4287,6 +4440,7 @@ void Test()
 #else
     TestPool_SameSize();
     TestHeapSizeLimit();
+    TestResize();
 #endif
 #if VMA_DEBUG_INITIALIZE_ALLOCATIONS
     TestAllocationsInitialization();

src/VmaReplay/VmaReplay.cpp

@@ -82,6 +82,7 @@ enum class VMA_FUNCTION
     TouchAllocation,
     GetAllocationInfo,
     MakePoolAllocationsLost,
+    ResizeAllocation,
     Count
 };
 static const char* VMA_FUNCTION_NAMES[] = {
@@ -104,6 +105,7 @@ static const char* VMA_FUNCTION_NAMES[] = {
     "vmaTouchAllocation",
     "vmaGetAllocationInfo",
     "vmaMakePoolAllocationsLost",
+    "vmaResizeAllocation",
 };
 static_assert(
     _countof(VMA_FUNCTION_NAMES) == (size_t)VMA_FUNCTION::Count,
@@ -143,7 +145,7 @@ static size_t g_DumpStatsAfterLineNextIndex = 0;
 static bool ValidateFileVersion()
 {
     if(GetVersionMajor(g_FileVersion) == 1 &&
-        GetVersionMinor(g_FileVersion) <= 3)
+        GetVersionMinor(g_FileVersion) <= 4)
     {
         return true;
     }
@@ -1015,6 +1017,7 @@ private:
     void ExecuteTouchAllocation(size_t lineNumber, const CsvSplit& csvSplit);
     void ExecuteGetAllocationInfo(size_t lineNumber, const CsvSplit& csvSplit);
     void ExecuteMakePoolAllocationsLost(size_t lineNumber, const CsvSplit& csvSplit);
+    void ExecuteResizeAllocation(size_t lineNumber, const CsvSplit& csvSplit);
 
     void DestroyAllocation(size_t lineNumber, const CsvSplit& csvSplit);
 };
@@ -1156,6 +1159,8 @@ void Player::ExecuteLine(size_t lineNumber, const StrRange& line)
             ExecuteGetAllocationInfo(lineNumber, csvSplit);
         else if(StrRangeEq(functionName, "vmaMakePoolAllocationsLost"))
             ExecuteMakePoolAllocationsLost(lineNumber, csvSplit);
+        else if(StrRangeEq(functionName, "vmaResizeAllocation"))
+            ExecuteResizeAllocation(lineNumber, csvSplit);
         else
         {
             if(IssueWarning())
@@ -2599,6 +2604,45 @@ void Player::ExecuteMakePoolAllocationsLost(size_t lineNumber, const CsvSplit& c
     }
 }
 
+void Player::ExecuteResizeAllocation(size_t lineNumber, const CsvSplit& csvSplit)
+{
+    m_Stats.RegisterFunctionCall(VMA_FUNCTION::ResizeAllocation);
+
+    if(ValidateFunctionParameterCount(lineNumber, csvSplit, 2, false))
+    {
+        uint64_t origPtr = 0;
+        uint64_t newSize = 0;
+
+        if(StrRangeToPtr(csvSplit.GetRange(FIRST_PARAM_INDEX), origPtr) &&
+            StrRangeToUint(csvSplit.GetRange(FIRST_PARAM_INDEX + 1), newSize))
+        {
+            if(origPtr != 0)
+            {
+                const auto it = m_Allocations.find(origPtr);
+                if(it != m_Allocations.end())
+                {
+                    vmaResizeAllocation(m_Allocator, it->second.allocation, newSize);
+                    UpdateMemStats();
+                }
+                else
+                {
+                    if(IssueWarning())
+                    {
+                        printf("Line %zu: Allocation %llX not found.\n", lineNumber, origPtr);
+                    }
+                }
+            }
+        }
+        else
+        {
+            if(IssueWarning())
+            {
+                printf("Line %zu: Invalid parameters for vmaResizeAllocation.\n", lineNumber);
+            }
+        }
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Main functions
 

src/VulkanSample.cpp

@@ -1306,6 +1306,15 @@ static void InitializeApplication()
         allocatorInfo.pAllocationCallbacks = &cpuAllocationCallbacks;
     }
 
+    // Uncomment to enable recording to CSV file.
+    /*
+    {
+        VmaRecordSettings recordSettings = {};
+        recordSettings.pFilePath = "VulkanSample.csv";
+        allocatorInfo.pRecordSettings = &recordSettings;
+    }
+    */
+
     ERR_GUARD_VULKAN( vmaCreateAllocator(&allocatorInfo, &g_hAllocator) );
 
     // Retrieve queue (doesn't need to be destroyed)

src/vk_mem_alloc.h

@@ -2374,6 +2374,31 @@ void vmaFreeMemory(
     VmaAllocator allocator,
     VmaAllocation allocation);
 
+/** \brief Tries to resize an allocation in place, if there is enough free memory after it.
+
+Tries to change allocation's size without moving or reallocating it.
+You can both shrink and grow allocation size.
+When growing, it succeeds only when the allocation belongs to a memory block with enough
+free space after it.
+
+Returns `VK_SUCCESS` if allocation's size has been successfully changed.
+Returns `VK_ERROR_OUT_OF_POOL_MEMORY` if allocation's size could not be changed.
+
+After successful call to this function, VmaAllocationInfo::size of this allocation changes.
+All other parameters stay the same: memory pool and type, alignment, offset, mapped pointer.
+
+- Calling this function on allocation that is in lost state fails with result `VK_ERROR_VALIDATION_FAILED_EXT`.
+- Calling this function with `newSize` same as current allocation size does nothing and returns `VK_SUCCESS`.
+- Resizing dedicated allocations, as well as allocations created in pools that use linear
+  or buddy algorithm, is not supported.
+  The function returns `VK_ERROR_FEATURE_NOT_PRESENT` in such cases.
+  Support may be added in the future.
+*/
+VkResult vmaResizeAllocation(
+    VmaAllocator allocator,
+    VmaAllocation allocation,
+    VkDeviceSize newSize);
+
 /** \brief Returns current information about specified allocation and atomically marks it as used in current frame.
 
 Current paramters of given allocation are returned in `pAllocationInfo`.
@@ -4506,6 +4531,8 @@ public:
         VmaDeviceMemoryBlock* block,
         VkDeviceSize offset); 
 
+    void ChangeSize(VkDeviceSize newSize);
+
     // pMappedData not null means allocation is created with MAPPED flag.
     void InitDedicatedAllocation(
         uint32_t memoryTypeIndex,
@@ -4766,6 +4793,9 @@ public:
     virtual void Free(const VmaAllocation allocation) = 0;
     virtual void FreeAtOffset(VkDeviceSize offset) = 0;
 
+    // Tries to resize (grow or shrink) space for given allocation, in place.
+    virtual bool ResizeAllocation(const VmaAllocation alloc, VkDeviceSize newSize) { return false; }
+
 protected:
     const VkAllocationCallbacks* GetAllocationCallbacks() const { return m_pAllocationCallbacks; }
 
@@ -4845,6 +4875,8 @@ public:
     virtual void Free(const VmaAllocation allocation);
     virtual void FreeAtOffset(VkDeviceSize offset);
 
+    virtual bool ResizeAllocation(const VmaAllocation alloc, VkDeviceSize newSize);
+
 private:
     uint32_t m_FreeCount;
     VkDeviceSize m_SumFreeSize;
@@ -5597,6 +5629,10 @@ public:
         VmaAllocation allocation);
     void RecordFreeMemory(uint32_t frameIndex,
         VmaAllocation allocation);
+    void RecordResizeAllocation(
+        uint32_t frameIndex,
+        VmaAllocation allocation,
+        VkDeviceSize newSize);
     void RecordSetAllocationUserData(uint32_t frameIndex,
         VmaAllocation allocation,
         const void* pUserData);
@@ -5763,6 +5799,10 @@ public:
     // Main deallocation function.
     void FreeMemory(const VmaAllocation allocation);
 
+    VkResult ResizeAllocation(
+        const VmaAllocation alloc,
+        VkDeviceSize newSize);
+
     void CalculateStats(VmaStats* pStats);
 
 #if VMA_STATS_STRING_ENABLED
@@ -6296,6 +6336,12 @@ void VmaAllocation_T::ChangeBlockAllocation(
     m_BlockAllocation.m_Offset = offset;
 }
 
+void VmaAllocation_T::ChangeSize(VkDeviceSize newSize)
+{
+    VMA_ASSERT(newSize > 0);
+    m_Size = newSize;
+}
+
 VkDeviceSize VmaAllocation_T::GetOffset() const
 {
     switch(m_Type)
@@ -7222,6 +7268,133 @@ void VmaBlockMetadata_Generic::FreeAtOffset(VkDeviceSize offset)
     VMA_ASSERT(0 && "Not found!");
 }
 
+bool VmaBlockMetadata_Generic::ResizeAllocation(const VmaAllocation alloc, VkDeviceSize newSize)
+{
+    typedef VmaSuballocationList::iterator iter_type;
+    for(iter_type suballocItem = m_Suballocations.begin();
+        suballocItem != m_Suballocations.end();
+        ++suballocItem)
+    {
+        VmaSuballocation& suballoc = *suballocItem;
+        if(suballoc.hAllocation == alloc)
+        {
+            iter_type nextItem = suballocItem;
+            ++nextItem;
+
+            // Should have been ensured on higher level.
+            VMA_ASSERT(newSize != alloc->GetSize() && newSize > 0);
+
+            // Shrinking.
+            if(newSize < alloc->GetSize())
+            {
+                const VkDeviceSize sizeDiff = suballoc.size - newSize;
+
+                // There is next item.
+                if(nextItem != m_Suballocations.end())
+                {
+                    // Next item is free.
+                    if(nextItem->type == VMA_SUBALLOCATION_TYPE_FREE)
+                    {
+                        // Grow this next item backward.
+                        UnregisterFreeSuballocation(nextItem);
+                        nextItem->offset -= sizeDiff;
+                        nextItem->size += sizeDiff;
+                        RegisterFreeSuballocation(nextItem);
+                    }
+                    // Next item is not free.
+                    else
+                    {
+                        // Create free item after current one.
+                        VmaSuballocation newFreeSuballoc;
+                        newFreeSuballoc.hAllocation = VK_NULL_HANDLE;
+                        newFreeSuballoc.offset = suballoc.offset + newSize;
+                        newFreeSuballoc.size = sizeDiff;
+                        newFreeSuballoc.type = VMA_SUBALLOCATION_TYPE_FREE;
+                        iter_type newFreeSuballocIt = m_Suballocations.insert(nextItem, newFreeSuballoc);
+                        RegisterFreeSuballocation(newFreeSuballocIt);
+
+                        ++m_FreeCount;
+                    }
+                }
+                // This is the last item.
+                else
+                {
+                    // Create free item at the end.
+                    VmaSuballocation newFreeSuballoc;
+                    newFreeSuballoc.hAllocation = VK_NULL_HANDLE;
+                    newFreeSuballoc.offset = suballoc.offset + newSize;
+                    newFreeSuballoc.size = sizeDiff;
+                    newFreeSuballoc.type = VMA_SUBALLOCATION_TYPE_FREE;
+                    m_Suballocations.push_back(newFreeSuballoc);
+
+                    iter_type newFreeSuballocIt = m_Suballocations.end();
+                    RegisterFreeSuballocation(--newFreeSuballocIt);
+
+                    ++m_FreeCount;
+                }
+
+                suballoc.size = newSize;
+                m_SumFreeSize += sizeDiff;
+            }
+            // Growing.
+            else
+            {
+                const VkDeviceSize sizeDiff = newSize - suballoc.size;
+
+                // There is next item.
+                if(nextItem != m_Suballocations.end())
+                {
+                    // Next item is free.
+                    if(nextItem->type == VMA_SUBALLOCATION_TYPE_FREE)
+                    {
+                        // There is not enough free space, including margin.
+                        if(nextItem->size < sizeDiff + VMA_DEBUG_MARGIN)
+                        {
+                            return false;
+                        }
+
+                        // There is more free space than required.
+                        if(nextItem->size > sizeDiff)
+                        {
+                            // Move and shrink this next item.
+                            UnregisterFreeSuballocation(nextItem);
+                            nextItem->offset += sizeDiff;
+                            nextItem->size -= sizeDiff;
+                            RegisterFreeSuballocation(nextItem);
+                        }
+                        // There is exactly the amount of free space required.
+                        else
+                        {
+                            // Remove this next free item.
+                            UnregisterFreeSuballocation(nextItem);
+                            m_Suballocations.erase(nextItem);
+                            --m_FreeCount;
+                        }
+                    }
+                    // Next item is not free - there is no space to grow.
+                    else
+                    {
+                        return false;
+                    }
+                }
+                // This is the last item - there is no space to grow.
+                else
+                {
+                    return false;
+                }
+
+                suballoc.size = newSize;
+                m_SumFreeSize -= sizeDiff;
+            }
+
+            // We cannot call Validate() here because alloc object is updated to new size outside of this call.
+            return true;
+        }
+    }
+    VMA_ASSERT(0 && "Not found!");
+    return false;
+}
+
 bool VmaBlockMetadata_Generic::ValidateFreeSuballocationList() const
 {
     VkDeviceSize lastSize = 0;
@@ -11368,7 +11541,7 @@ VkResult VmaRecorder::Init(const VmaRecordSettings& settings, bool useMutex)
 
     // Write header.
     fprintf(m_File, "%s\n", "Vulkan Memory Allocator,Calls recording");
-    fprintf(m_File, "%s\n", "1,3");
+    fprintf(m_File, "%s\n", "1,4");
 
     return VK_SUCCESS;
 }
@@ -11524,6 +11697,20 @@ void VmaRecorder::RecordFreeMemory(uint32_t frameIndex,
     Flush();
 }
 
+void VmaRecorder::RecordResizeAllocation(
+    uint32_t frameIndex,
+    VmaAllocation allocation,
+    VkDeviceSize newSize)
+{
+    CallParams callParams;
+    GetBasicParams(callParams);
+
+    VmaMutexLock lock(m_FileMutex, m_UseMutex);
+    fprintf(m_File, "%u,%.3f,%u,vmaResizeAllocation,%p,%llu\n", callParams.threadId, callParams.time, frameIndex,
+        allocation, newSize);
+    Flush();
+}
+
 void VmaRecorder::RecordSetAllocationUserData(uint32_t frameIndex,
     VmaAllocation allocation,
     const void* pUserData)
@@ -12487,6 +12674,40 @@ void VmaAllocator_T::FreeMemory(const VmaAllocation allocation)
     vma_delete(this, allocation);
 }
 
+VkResult VmaAllocator_T::ResizeAllocation(
+    const VmaAllocation alloc,
+    VkDeviceSize newSize)
+{
+    if(newSize == 0 || alloc->GetLastUseFrameIndex() == VMA_FRAME_INDEX_LOST)
+    {
+        return VK_ERROR_VALIDATION_FAILED_EXT;
+    }
+    if(newSize == alloc->GetSize())
+    {
+        return VK_SUCCESS;
+    }
+
+    switch(alloc->GetType())
+    {
+    case VmaAllocation_T::ALLOCATION_TYPE_DEDICATED:
+        return VK_ERROR_FEATURE_NOT_PRESENT;
+    case VmaAllocation_T::ALLOCATION_TYPE_BLOCK:
+        if(alloc->GetBlock()->m_pMetadata->ResizeAllocation(alloc, newSize))
+        {
+            alloc->ChangeSize(newSize);
+            VMA_HEAVY_ASSERT(alloc->GetBlock()->m_pMetadata->Validate());
+            return VK_SUCCESS;
+        }
+        else
+        {
+            return VK_ERROR_OUT_OF_POOL_MEMORY;
+        }
+    default:
+        VMA_ASSERT(0);
+        return VK_ERROR_VALIDATION_FAILED_EXT;
+    }
+}
+
 void VmaAllocator_T::CalculateStats(VmaStats* pStats)
 {
     // Initialize.
@@ -13889,6 +14110,30 @@ void vmaFreeMemory(
     allocator->FreeMemory(allocation);
 }
 
+VkResult vmaResizeAllocation(
+    VmaAllocator allocator,
+    VmaAllocation allocation,
+    VkDeviceSize newSize)
+{
+    VMA_ASSERT(allocator && allocation);
+    
+    VMA_DEBUG_LOG("vmaResizeAllocation");
+    
+    VMA_DEBUG_GLOBAL_MUTEX_LOCK
+
+#if VMA_RECORDING_ENABLED
+    if(allocator->GetRecorder() != VMA_NULL)
+    {
+        allocator->GetRecorder()->RecordResizeAllocation(
+            allocator->GetCurrentFrameIndex(),
+            allocation,
+            newSize);
+    }
+#endif
+    
+    return allocator->ResizeAllocation(allocation, newSize);
+}
+
 void vmaGetAllocationInfo(
     VmaAllocator allocator,
     VmaAllocation allocation,