feature: Compiler flag added for verbose debug output

VM will now only output verbose debugging information if -dDEBUG_OUTPUT is supplied.

.gitignore

@@ -1,3 +1,4 @@
 bin
 lib
 AGENTS.md
+GAP_ANALYSIS.md

build.bat

@@ -1,44 +0,0 @@
-@echo off
-setlocal
-
-set ROOT=%~dp0
-set SRC=%ROOT%src
-set BIN=%ROOT%bin
-set LIB=%ROOT%lib
-set FPC=C:\Lazarus\fpc\3.2.2\bin\x86_64-win64\fpc.exe
-
-set TESTFLAGS=
-if "%1"=="test" set TESTFLAGS=-dRUN_TESTS
-
-if not exist "%BIN%" mkdir "%BIN%"
-if not exist "%LIB%" mkdir "%LIB%"
-
-REM ── Lint ────────────────────────────────────────────────────────────
-powershell -NoProfile -ExecutionPolicy Bypass -File "%ROOT%lint.ps1" -SrcRoot "%SRC%"
-if %ERRORLEVEL% NEQ 0 exit /b 1
-
-"%FPC%" ^
-  %TESTFLAGS% ^
-  -FE"%BIN%" ^
-  -FU"%LIB%" ^
-  -Fu"%SRC%\emu" ^
-  -Fu"%SRC%\wasm" ^
-  -Fu"%SRC%\wasm\parser" ^
-  -Fu"%SRC%\wasm\parser\sections" ^
-  -Fu"%SRC%\wasm\test" ^
-  -Fu"%SRC%\wasm\test\opcodes" ^
-  -Fu"%SRC%\wasm\test\parsers" ^
-  -Fu"%SRC%\wasm\test\binaries" ^
-  -Fu"%SRC%\wasm\test\infra" ^
-  -Fu"%SRC%\wasm\types" ^
-  -Fu"%SRC%\wasm\vm" ^
-  -gw3 ^
-  -o"%BIN%\WASURO.exe" ^
-  "%SRC%\project\WASURO.lpr"
-
-if %ERRORLEVEL% NEQ 0 (
-    echo Build failed with error code %ERRORLEVEL%
-    exit /b %ERRORLEVEL%
-)
-
-echo Build succeeded: %BIN%\WASURO.exe

build.ps1

@@ -0,0 +1,93 @@
+# build.ps1 — Build script for the WASURO project
+param(
+    [switch]$Test,
+    [switch]$Clean,
+    [switch]$Run,
+    [switch]$Help,
+    [switch]$Debug
+)
+
+# Also accept positional string args (e.g. .\build.ps1 clean test run)
+foreach ($a in $args) {
+    switch ($a.ToLower()) {
+        'test'  { $Test  = $true }
+        'clean' { $Clean = $true }
+        'run'   { $Run   = $true }
+        'debug' { $Debug = $true }
+        'help'  { $Help  = $true }
+    }
+}
+
+if ($Help) {
+    Write-Host 'Usage: .\build.ps1 [options]'
+    Write-Host 'Options:'
+    Write-Host '  test   - Build with tests enabled'
+    Write-Host '  clean  - Clean build outputs'
+    Write-Host '  run    - Run the built executable after building'
+    Write-Host '  debug  - Build with debug info and assertions enabled'
+    Write-Host '  help   - Show this help message'
+    exit 0
+}
+
+$Root = $PSScriptRoot
+$Src  = Join-Path $Root 'src'
+$Bin  = Join-Path $Root 'bin'
+$Lib  = Join-Path $Root 'lib'
+$FPC  = 'C:\Lazarus\fpc\3.2.2\bin\x86_64-win64\fpc.exe'
+
+# ── Clean ────────────────────────────────────────────────────────────
+if ($Clean) {
+    Write-Host 'Cleaning build outputs...'
+    if (Test-Path $Bin) { Remove-Item $Bin -Recurse -Force }
+    if (Test-Path $Lib) { Remove-Item $Lib -Recurse -Force }
+    Write-Host 'Clean complete.'
+}
+
+if (-not (Test-Path $Bin)) { New-Item $Bin -ItemType Directory | Out-Null }
+if (-not (Test-Path $Lib)) { New-Item $Lib -ItemType Directory | Out-Null }
+
+# ── Lint ─────────────────────────────────────────────────────────────
+& (Join-Path $Root 'lint.ps1') -SrcRoot $Src
+if ($LASTEXITCODE -ne 0) { exit 1 }
+
+# ── Build ────────────────────────────────────────────────────────────
+$TestFlags = @()
+if ($Test)  { $TestFlags += '-dRUN_TESTS' }
+if ($Debug) { $TestFlags += '-dDEBUG_OUTPUT' }
+
+$fpcArgs = @(
+    $TestFlags
+    "-FE$Bin"
+    "-FU$Lib"
+    "-Fu$Src\emu"
+    "-Fu$Src\wasm"
+    "-Fu$Src\wasm\parser"
+    "-Fu$Src\wasm\parser\sections"
+    "-Fu$Src\wasm\test"
+    "-Fu$Src\wasm\test\opcodes"
+    "-Fu$Src\wasm\test\parsers"
+    "-Fu$Src\wasm\test\binaries"
+    "-Fu$Src\wasm\test\infra"
+    "-Fu$Src\wasm\types"
+    "-Fu$Src\wasm\vm"
+    "-Fu$Src\wasm\vm\opcodes"
+    '-gw3'
+    "-o$Bin\WASURO.exe"
+    "$Src\project\WASURO.lpr"
+)
+
+Write-Output $fpcArgs
+
+& $FPC @fpcArgs
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "Build failed with error code $LASTEXITCODE"
+    exit $LASTEXITCODE
+}
+
+Write-Host "Build succeeded: $Bin\WASURO.exe"
+
+# ── Run ──────────────────────────────────────────────────────────────
+if ($Run) {
+    Write-Host 'Running WASURO...'
+    & "$Bin\WASURO.exe"
+}

lint.ps1

@@ -1,5 +1,5 @@
 # lint.ps1 — Static lint rules for the WASURO project
-# Called by build.bat before compilation. Exit 1 on any violation.
+# Called by build.ps1 before compilation. Exit 1 on any violation.
 param(
     [string]$SrcRoot = (Join-Path $PSScriptRoot 'src')
 )
@@ -43,6 +43,6 @@ if ($ruleHits -gt 0) {
 }
 
 # ── Add more rules here ─────────────────────────────────────────────
-
 if ($fail) { exit 1 }
 Write-Host 'Lint passed.'
+exit 0

src/project/WASURO.lpr

@@ -5,12 +5,11 @@ uses
 
     console,
 
-    types,
-
+    wasm.types.builtin,
     wasm.types.context,
+    wasm.types.stack,
     wasm.parser,
-    wasm.vm, wasm.test.binary.return42,
-    wasm.types.stack
+    wasm.vm
     {$IFDEF RUN_TESTS}
     , wasm.test
     , wasm.test.framework
@@ -19,6 +18,9 @@ uses
 
 var
    Context : PWASMProcessContext;
+   ModuleSize     : Int64;
+   ModuleBuffer   : TWASMPUInt8;
+   ModuleFile     : File;
 
 begin
     {$IFDEF RUN_TESTS}
@@ -26,22 +28,45 @@ begin
     wasm.test.run_all_tests;
     halt(wasm.test.framework.FailedTests);
     {$ELSE}
-    writestringln('[main] Initializing VM');
+    console.writestringln('WASURO - WebAssembly Runtime in Object Pascal');
     wasm.vm.init();
-
-    writestringln('[main] Parsing WASM Binary');
-    Context:= wasm.parser.parse(@wasm.test.binary.return42.BINARY[0], puint8(@wasm.test.binary.return42.BINARY[0] + wasm.test.binary.return42.BINARY_SIZE));
-
-    writestringln('[main] Running...');
-    Context^.ExecutionState.Running:= true;
-    while (wasm.vm.tick(Context)) do;
-    writestringln('[main] Finished Execution');
-    writestring('[main] Returns: ');
-    while Context^.ExecutionState.Operand_Stack^.Top > 0 do begin
-        write(wasm.types.stack.popi32(Context^.ExecutionState.Operand_Stack),', ');
+    if ParamCount > 0 then begin
+        if not FileExists(ParamStr(1)) then begin
+            console.writestringln('File not found.');
+            halt(1);
+        end;
+        Assign(ModuleFile, ParamStr(1));
+        Reset(ModuleFile, 1);
+        ModuleSize := FileSize(ModuleFile);
+        GetMem(ModuleBuffer, ModuleSize);
+        BlockRead(ModuleFile, ModuleBuffer^, ModuleSize);
+        Close(ModuleFile);
+        console.writestringln('Module loaded.');
+        Context := wasm.parser.parse(ModuleBuffer, TWASMPUInt8(ModuleBuffer + ModuleSize));
+        while wasm.vm.tick(Context) do ;
+        console.writestringln('Execution finished.');
+        console.writestringln('');
+        console.writestringln('--- VM State ---');
+        writeln('IP:      ', Context^.ExecutionState.IP);
+        writeln('Running: ', Context^.ExecutionState.Running);
+        writeln('');
+        writeln('Operand Stack (', Context^.ExecutionState.Operand_Stack^.Top, ' entries):');
+        if Context^.ExecutionState.Operand_Stack^.Top > 0 then
+            wasm.types.stack.walk(Context^.ExecutionState.Operand_Stack)
+        else
+            console.writestringln('  (empty)');
+        writeln('');
+        writeln('Control Stack (', Context^.ExecutionState.Control_Stack^.Top, ' entries):');
+        if Context^.ExecutionState.Control_Stack^.Top > 0 then
+            wasm.types.stack.walk(Context^.ExecutionState.Control_Stack)
+        else
+            console.writestringln('  (empty)');
+        console.writestringln('----------------');
+        FreeMem(ModuleBuffer);
+    end else begin
+        console.writestringln('Usage: WASURO <module.wasm>');
+        halt(1);
     end;
-    writeln();
-    while true do sleep(1000);
     {$ENDIF}
 end.
 

src/wasm/parser/sections/wasm.parser.sections.codeSection.pas

@@ -72,8 +72,10 @@ var
    totalSize: TWASMUInt32;
 
 begin
-    writestring('[wasm.parser] Handle Section: Code - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Code - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
 
     // Initialize the read/end pointers
     pos:= buffer;
@@ -183,8 +185,9 @@ begin
             end;
         end;
     end;
-
+    {$IFDEF DEBUG_OUTPUT}
     walk(ctx);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.customSection.pas

@@ -12,8 +12,12 @@ implementation
 
 procedure handle(buffer: TWASMPUInt8; section_length: TWASMUInt32; ctx: PWASMProcessContext);
 begin
-    writestring('[wasm.parser] Handle Section: Custom - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Custom - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
+    { Custom sections are ignored in this implementation }
+    console.writestringln('[wasm.parser] TODO: Custom section skipped.');
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.dataCountSection.pas

@@ -0,0 +1,48 @@
+unit wasm.parser.sections.dataCountSection;
+
+interface
+
+uses
+    wasm.types.builtin, wasm.types.context;
+
+procedure handle(buffer: TWASMPUInt8; section_length: TWASMUInt32; ctx: PWASMProcessContext);
+
+implementation
+
+uses console, leb128, lmemorymanager, wasm.types.sections;
+
+{ DataCount section (ID 12): contains a single u32 count of data segments.
+  Pre-allocates the DataSegments array so that bulk memory opcodes
+  can reference segments by index during validation. }
+procedure handle(buffer: TWASMPUInt8; section_length: TWASMUInt32; ctx: PWASMProcessContext);
+var
+    pos, bend : TWASMPUInt8;
+    bytesRead : TWASMUInt8;
+    dataCount : TWASMUInt32;
+begin
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: DataCount - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
+
+    pos := buffer;
+    bend := TWASMPUInt8(buffer + section_length);
+
+    bytesRead := read_leb128_to_uint32(pos, bend, @dataCount);
+    Inc(pos, bytesRead);
+
+    {$IFDEF DEBUG_OUTPUT}
+    writestring('[wasm.parser]     Data Count: ');
+    writeintlnWND(dataCount, 0);
+    {$ENDIF}
+
+    { Pre-allocate data segment storage with correct count.
+      The actual segment data will be filled when the Data section is parsed. }
+    ctx^.ExecutionState.DataSegments^.SegmentCount := dataCount;
+    if dataCount > 0 then
+        ctx^.ExecutionState.DataSegments^.Segments := PWASMDataSegment(kalloc(dataCount * sizeof(TWASMDataSegment)))
+    else
+        ctx^.ExecutionState.DataSegments^.Segments := nil;
+end;
+
+end.

src/wasm/parser/sections/wasm.parser.sections.exportSection.pas

@@ -36,8 +36,10 @@ var
    i,j : TWASMUInt32;
 
 begin
-    writestring('[wasm.parser] Handle Section: Export - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Export - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
 
     // Initialize the read/end pointers
     pos:= buffer;
@@ -85,8 +87,9 @@ begin
             inc(pos, bytesRead);
         end;
     end;
-
+    {$IFDEF DEBUG_OUTPUT}
     walk(ctx);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.functionSection.pas

@@ -32,8 +32,10 @@ var
    i : TWASMUInt32;
 
 begin
-    writestring('[wasm.parser] Handle Section: Function - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Function - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
 
     // Initialize the read/end pointers
     pos:= buffer;
@@ -64,8 +66,9 @@ begin
             inc(pos, bytesRead);
         end;
     end;
-    
+    {$IFDEF DEBUG_OUTPUT}
     walk(ctx);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.globalSection.pas

@@ -49,8 +49,10 @@ var
    tmpU64 : TWASMUInt64;
 
 begin
-    writestring('[wasm.parser] Handle Section: Global - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Global - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
     
     pos := buffer;
     bend := TWASMPUInt8(buffer + section_length);
@@ -115,8 +117,9 @@ begin
         if (pos < bend) and (pos^ = $0B) then
             Inc(pos);
     end;
-
+    {$IFDEF DEBUG_OUTPUT}
     walk(ctx);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.memorySection.pas

@@ -39,8 +39,10 @@ var
    flags : TWASMUInt32;
 
 begin
-    writestring('[wasm.parser] Handle Section: Memory - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Memory - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
 
     pos := buffer;
     bend := TWASMPUInt8(buffer + section_length);
@@ -77,8 +79,9 @@ begin
         while ctx^.ExecutionState.Memory^.PageCount < mem^.InitialPages do
             wasm.types.heap.expand_heap(ctx^.ExecutionState.Memory);
     end;
-
+    {$IFDEF DEBUG_OUTPUT}
     walk(ctx);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.startSection.pas

@@ -16,15 +16,19 @@ var
    funcIdx : TWASMUInt32;
 
 begin
-    writestring('[wasm.parser] Handle Section: Start - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Start - Size: ');
+     console.writeintlnWND(section_length, 0);
+    {$ENDIF}
 
     { Read the start function index }
     bytesRead := read_leb128_to_uint32(buffer, TWASMPUInt8(buffer + section_length), @funcIdx);
     ctx^.Sections.StartIndex := TWASMInt32(funcIdx);
 
-    writestring('[wasm.parser]     Start Function Index: ');
-    writeintlnWND(funcIdx, 0);
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser]     Start Function Index: ');
+     console.writeintlnWND(funcIdx, 0);
+    {$ENDIF}
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.tableSection.pas

@@ -4,16 +4,91 @@ interface
 
 uses
     wasm.types.builtin, lmemorymanager, console, leb128,
-    wasm.types.context;
+    wasm.types.sections, wasm.types.context;
 
 procedure handle(buffer: TWASMPUInt8; section_length: TWASMUInt32; ctx: PWASMProcessContext);
 
 implementation
 
 procedure handle(buffer: TWASMPUInt8; section_length: TWASMUInt32; ctx: PWASMProcessContext);
+var
+    pos: TWASMPUInt8;
+    buf_end: TWASMPUInt8;
+    bytesRead: TWASMUInt8;
+    table_count, i, j, min_size, max_size: TWASMUInt32;
+    elem_type, limits_flag: TWASMUInt8;
+    tables: PWASMTables;
 begin
-    writestring('[wasm.parser] Handle Section: Table - Size: ');
-    writeintlnWND(section_length, 0);
+    {$IFDEF DEBUG_OUTPUT}
+    console.writestring('[wasm.parser] Handle Section: Table - Size: ');
+    console.writeintlnWND(section_length, 0);
+    {$ENDIF}
+
+    pos := buffer;
+    buf_end := buffer;
+    Inc(buf_end, section_length);
+
+    bytesRead := read_leb128_to_uint32(pos, buf_end, @table_count);
+    Inc(pos, bytesRead);
+
+    {$IFDEF DEBUG_OUTPUT}
+    writestring('[wasm.parser]     Tables: ');
+    writeintlnWND(table_count, 0);
+    {$ENDIF}
+
+    tables := ctx^.ExecutionState.Tables;
+    tables^.TableCount := table_count;
+    if table_count > 0 then
+        tables^.Tables := PWASMTableInstance(kalloc(sizeof(TWASMTableInstance) * table_count))
+    else
+        tables^.Tables := nil;
+
+    for i := 0 to table_count - 1 do begin
+        elem_type := pos^;
+        Inc(pos);
+
+        limits_flag := pos^;
+        Inc(pos);
+
+        bytesRead := read_leb128_to_uint32(pos, buf_end, @min_size);
+        Inc(pos, bytesRead);
+
+        max_size := 0;
+        if limits_flag = 1 then begin
+            bytesRead := read_leb128_to_uint32(pos, buf_end, @max_size);
+            Inc(pos, bytesRead);
+        end;
+
+        {$IFDEF DEBUG_OUTPUT}
+        console.writestring('[wasm.parser]     Table ');
+        console.writeintWND(i, 0);
+        console.writestring(' - ElemType: $');
+        console.writeintWND(elem_type, 0);
+        console.writestring(' Initial: ');
+        console.writeintWND(min_size, 0);
+        if limits_flag = 1 then begin
+            console.writestring(' Max: ');
+            console.writeintWND(max_size, 0);
+        end;
+        console.writestringln('');
+        {$ENDIF}
+
+        tables^.Tables[i].ElementType := elem_type;
+        tables^.Tables[i].Size := min_size;
+        tables^.Tables[i].HasMax := (limits_flag = 1);
+        if limits_flag = 1 then
+            tables^.Tables[i].MaxSize := max_size
+        else
+            tables^.Tables[i].MaxSize := 0;
+
+        { Allocate elements and initialize to $FFFFFFFF (uninitialized) }
+        if min_size > 0 then begin
+            tables^.Tables[i].Elements := TWASMPUInt32(kalloc(sizeof(TWASMUInt32) * min_size));
+            for j := 0 to min_size - 1 do
+                tables^.Tables[i].Elements[j] := $FFFFFFFF;
+        end else
+            tables^.Tables[i].Elements := nil;
+    end;
 end;
 
 end.

src/wasm/parser/sections/wasm.parser.sections.typeSection.pas

@@ -59,8 +59,11 @@ var
    i, parsedTypes : TWASMUInt32;
 
 begin
-     writestring('[wasm.parser] Handle Section: Type - Size: ');
-     writeintlnWND(section_length, 0);
+     
+     {$IFDEF DEBUG_OUTPUT}
+     console.writestring('[wasm.parser] Handle Section: Type - Size: ');
+     console.writeintlnWND(section_length, 0);
+     {$ENDIF}
      pos:= buffer;
 
      // Initialize the type section
@@ -118,7 +121,9 @@ begin
      end;
 
      // Walk the wasm.types.builtin
+     {$IFDEF DEBUG_OUTPUT}
      walk(ctx);
+     {$ENDIF}
 end;
 
 end.

src/wasm/parser/wasm.parser.pas

@@ -36,6 +36,7 @@ begin
 
     // Initialize the sections
     ctx^.Sections.TypeSection:= nil;
+    ctx^.Sections.ImportSection:= nil;
     ctx^.Sections.FunctionSection:= nil;
     ctx^.Sections.ExportSection:= nil;
     ctx^.Sections.CodeSection:= nil;
@@ -47,6 +48,21 @@ begin
     ctx^.ExecutionState.Globals^.GlobalCount:= 0;
     ctx^.ExecutionState.Globals^.Globals:= nil;
 
+    // Initialize tables (empty until table section is parsed)
+    ctx^.ExecutionState.Tables:= PWASMTables(kalloc(sizeof(TWASMTables)));
+    ctx^.ExecutionState.Tables^.TableCount:= 0;
+    ctx^.ExecutionState.Tables^.Tables:= nil;
+
+    // Initialize data segments (empty until data section is parsed)
+    ctx^.ExecutionState.DataSegments:= PWASMDataSegments(kalloc(sizeof(TWASMDataSegments)));
+    ctx^.ExecutionState.DataSegments^.SegmentCount:= 0;
+    ctx^.ExecutionState.DataSegments^.Segments:= nil;
+
+    // Initialize element segments (empty until element section is parsed)
+    ctx^.ExecutionState.ElementSegments:= PWASMElementSegments(kalloc(sizeof(TWASMElementSegments)));
+    ctx^.ExecutionState.ElementSegments^.SegmentCount:= 0;
+    ctx^.ExecutionState.ElementSegments^.Segments:= nil;
+
     newContext:= ctx;
 end;
 
@@ -63,11 +79,15 @@ begin
     ctx:= newContext();
     pos:= buffer;
 
-    writestringln('[wasm.parser] Parsing WASM Binary');
+    {$IFDEF DEBUG_OUTPUT}
+     console.writestringln('[wasm.parser] Starting parse of WASM binary.');
+    {$ENDIF}
 
     // Check for the WASM Magic
     if(TWASMPUInt32(pos)^ = wasm.types.constants.WASM_HDR_MAGIC) then begin   
-        writestringln('[wasm.parser] Binary is valid.');
+        {$IFDEF DEBUG_OUTPUT}
+         console.writestringln('[wasm.parser] Binary is valid.');
+        {$ENDIF}
 
         // Set binary to valid
         ctx^.ValidBinary:= true;
@@ -76,8 +96,10 @@ begin
         // Read the version
         ctx^.Version:= TWASMPUInt32(pos)^;
         inc(pos, 4);
-        writestring('[wasm.parser] Version: ');
-        writeintlnWND(ctx^.Version, 0);
+        {$IFDEF DEBUG_OUTPUT}
+         console.writestring('[wasm.parser] Version: ');
+         console.writeintlnWND(ctx^.Version, 0);
+        {$ENDIF}
 
         // Read the sections
         while (pos < buffer_end) do begin

src/wasm/parser/wasm.parser.sections.pas

@@ -16,7 +16,8 @@ uses
     wasm.parser.sections.startSection,
     wasm.parser.sections.elementSection,
     wasm.parser.sections.codeSection,
-    wasm.parser.sections.dataSection;
+    wasm.parser.sections.dataSection,
+    wasm.parser.sections.dataCountSection;
 
 procedure handle(sectionId : TWASMUInt8; buffer : TWASMPUInt8; section_length : TWASMUInt32; ctx : PWASMProcessContext);
 
@@ -50,6 +51,8 @@ begin
         ord(sidCode):     wasm.parser.sections.codeSection.handle      (buffer, section_length, ctx);
         // Data Section
         ord(sidData):     wasm.parser.sections.dataSection.handle      (buffer, section_length, ctx);
+        // DataCount Section
+        ord(sidDataCount): wasm.parser.sections.dataCountSection.handle (buffer, section_length, ctx);
     end;
 end;