diff --git a/dlls/jscript/array.c b/dlls/jscript/array.c
index d69c9f7edf4..db92a6fe109 100644
--- a/dlls/jscript/array.c
+++ b/dlls/jscript/array.c
@@ -242,7 +242,7 @@ static HRESULT array_join(script_ctx_t *ctx, jsdisp_t *array, DWORD length, cons
         return S_OK;
     }
 
-    str_tab = heap_alloc_zero(length * sizeof(*str_tab));
+    str_tab = calloc(length, sizeof(*str_tab));
     if(!str_tab)
         return E_OUTOFMEMORY;
 
@@ -304,7 +304,7 @@ static HRESULT array_join(script_ctx_t *ctx, jsdisp_t *array, DWORD length, cons
         if(str_tab[i])
             jsstr_release(str_tab[i]);
     }
-    heap_free(str_tab);
+    free(str_tab);
     if(FAILED(hres))
         return hres;
 
@@ -720,7 +720,7 @@ static HRESULT Array_sort(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned
         goto done;
     }
 
-    vtab = heap_alloc_zero(length * sizeof(*vtab));
+    vtab = calloc(length, sizeof(*vtab));
     if(vtab) {
         for(i=0; i<length; i++) {
             hres = jsdisp_get_idx(jsthis, i, vtab+i);
@@ -737,7 +737,7 @@ static HRESULT Array_sort(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned
     }
 
     if(SUCCEEDED(hres)) {
-        sorttab = heap_alloc(length*2*sizeof(*sorttab));
+        sorttab = malloc(length*2*sizeof(*sorttab));
         if(!sorttab)
             hres = E_OUTOFMEMORY;
     }
@@ -809,9 +809,9 @@ static HRESULT Array_sort(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned
     if(vtab) {
         for(i=0; i < length; i++)
             jsval_release(vtab[i]);
-        heap_free(vtab);
+        free(vtab);
     }
-    heap_free(sorttab);
+    free(sorttab);
     if(cmp_func)
         jsdisp_release(cmp_func);
 
@@ -1607,7 +1607,7 @@ done:
 
 static void Array_destructor(jsdisp_t *dispex)
 {
-    heap_free(dispex);
+    free(dispex);
 }
 
 static void Array_on_put(jsdisp_t *dispex, const WCHAR *name)
@@ -1755,7 +1755,7 @@ static HRESULT alloc_array(script_ctx_t *ctx, jsdisp_t *object_prototype, ArrayI
     ArrayInstance *array;
     HRESULT hres;
 
-    array = heap_alloc_zero(sizeof(ArrayInstance));
+    array = calloc(1, sizeof(ArrayInstance));
     if(!array)
         return E_OUTOFMEMORY;
 
@@ -1765,7 +1765,7 @@ static HRESULT alloc_array(script_ctx_t *ctx, jsdisp_t *object_prototype, ArrayI
         hres = init_dispex_from_constr(&array->dispex, ctx, &ArrayInst_info, ctx->array_constr);
 
     if(FAILED(hres)) {
-        heap_free(array);
+        free(array);
         return hres;
     }
 
diff --git a/dlls/jscript/bool.c b/dlls/jscript/bool.c
index 3a4aa9c9199..57c5cf5b4c6 100644
--- a/dlls/jscript/bool.c
+++ b/dlls/jscript/bool.c
@@ -180,7 +180,7 @@ static HRESULT alloc_bool(script_ctx_t *ctx, jsdisp_t *object_prototype, BoolIns
     BoolInstance *bool;
     HRESULT hres;
 
-    bool = heap_alloc_zero(sizeof(BoolInstance));
+    bool = calloc(1, sizeof(BoolInstance));
     if(!bool)
         return E_OUTOFMEMORY;
 
@@ -190,7 +190,7 @@ static HRESULT alloc_bool(script_ctx_t *ctx, jsdisp_t *object_prototype, BoolIns
         hres = init_dispex_from_constr(&bool->dispex, ctx, &BoolInst_info, ctx->bool_constr);
 
     if(FAILED(hres)) {
-        heap_free(bool);
+        free(bool);
         return hres;
     }
 
diff --git a/dlls/jscript/compile.c b/dlls/jscript/compile.c
index 482805cc52d..9d7944fcf72 100644
--- a/dlls/jscript/compile.c
+++ b/dlls/jscript/compile.c
@@ -153,7 +153,7 @@ static BOOL alloc_local_scope(compiler_ctx_t *ctx, unsigned int *scope_index)
     if (scope == ctx->local_scope_size)
     {
         new_size = max(1, ctx->local_scope_size * 2);
-        if (!(new_alloc = heap_realloc(ctx->local_scopes, new_size * sizeof(*ctx->local_scopes))))
+        if (!(new_alloc = realloc(ctx->local_scopes, new_size * sizeof(*ctx->local_scopes))))
             return FALSE;
         ctx->local_scopes = new_alloc;
         ctx->local_scope_size = new_size;
@@ -191,14 +191,14 @@ jsstr_t *compiler_alloc_string_len(compiler_ctx_t *ctx, const WCHAR *str, unsign
     jsstr_t *new_str;
 
     if(!ctx->code->str_pool_size) {
-        ctx->code->str_pool = heap_alloc(8 * sizeof(jsstr_t*));
+        ctx->code->str_pool = malloc(8 * sizeof(jsstr_t*));
         if(!ctx->code->str_pool)
             return NULL;
         ctx->code->str_pool_size = 8;
     }else if(ctx->code->str_pool_size == ctx->code->str_cnt) {
         jsstr_t **new_pool;
 
-        new_pool = heap_realloc(ctx->code->str_pool, ctx->code->str_pool_size*2*sizeof(jsstr_t*));
+        new_pool = realloc(ctx->code->str_pool, ctx->code->str_pool_size*2*sizeof(jsstr_t*));
         if(!new_pool)
             return NULL;
 
@@ -222,14 +222,14 @@ static jsstr_t *compiler_alloc_string(compiler_ctx_t *ctx, const WCHAR *str)
 static BOOL ensure_bstr_slot(compiler_ctx_t *ctx)
 {
     if(!ctx->code->bstr_pool_size) {
-        ctx->code->bstr_pool = heap_alloc(8 * sizeof(BSTR));
+        ctx->code->bstr_pool = malloc(8 * sizeof(BSTR));
         if(!ctx->code->bstr_pool)
             return FALSE;
         ctx->code->bstr_pool_size = 8;
     }else if(ctx->code->bstr_pool_size == ctx->code->bstr_cnt) {
         BSTR *new_pool;
 
-        new_pool = heap_realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
+        new_pool = realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
         if(!new_pool)
             return FALSE;
 
@@ -276,7 +276,7 @@ static unsigned push_instr(compiler_ctx_t *ctx, jsop_t op)
     if(ctx->code_size == ctx->code_off) {
         instr_t *new_instrs;
 
-        new_instrs = heap_realloc(ctx->code->instrs, ctx->code_size*2*sizeof(instr_t));
+        new_instrs = realloc(ctx->code->instrs, ctx->code_size*2*sizeof(instr_t));
         if(!new_instrs)
             return 0;
 
@@ -457,14 +457,14 @@ static HRESULT compile_member_expression(compiler_ctx_t *ctx, member_expression_
 static unsigned alloc_label(compiler_ctx_t *ctx)
 {
     if(!ctx->labels_size) {
-        ctx->labels = heap_alloc(8 * sizeof(*ctx->labels));
+        ctx->labels = malloc(8 * sizeof(*ctx->labels));
         if(!ctx->labels)
             return 0;
         ctx->labels_size = 8;
     }else if(ctx->labels_size == ctx->labels_cnt) {
         unsigned *new_labels;
 
-        new_labels = heap_realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
+        new_labels = realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
         if(!new_labels)
             return 0;
 
@@ -1741,7 +1741,7 @@ static HRESULT compile_switch_statement(compiler_ctx_t *ctx, switch_statement_t
             case_cnt++;
     }
 
-    case_jmps = heap_alloc(case_cnt * sizeof(*case_jmps));
+    case_jmps = malloc(case_cnt * sizeof(*case_jmps));
     if(!case_jmps)
         return E_OUTOFMEMORY;
 
@@ -1775,7 +1775,7 @@ static HRESULT compile_switch_statement(compiler_ctx_t *ctx, switch_statement_t
     }
 
     if(FAILED(hres)) {
-        heap_free(case_jmps);
+        free(case_jmps);
         return hres;
     }
 
@@ -1798,7 +1798,7 @@ static HRESULT compile_switch_statement(compiler_ctx_t *ctx, switch_statement_t
             break;
     }
 
-    heap_free(case_jmps);
+    free(case_jmps);
     if(FAILED(hres))
         return hres;
     assert(i == case_cnt);
@@ -2466,12 +2466,12 @@ void release_bytecode(bytecode_t *code)
 
     if(code->named_item)
         release_named_item(code->named_item);
-    heap_free(code->source);
+    free(code->source);
     heap_pool_free(&code->heap);
-    heap_free(code->bstr_pool);
-    heap_free(code->str_pool);
-    heap_free(code->instrs);
-    heap_free(code);
+    free(code->bstr_pool);
+    free(code->str_pool);
+    free(code->instrs);
+    free(code);
 }
 
 static HRESULT init_code(compiler_ctx_t *compiler, const WCHAR *source, UINT64 source_context, unsigned start_line)
@@ -2481,7 +2481,7 @@ static HRESULT init_code(compiler_ctx_t *compiler, const WCHAR *source, UINT64 s
     if(len > INT32_MAX)
         return E_OUTOFMEMORY;
 
-    compiler->code = heap_alloc_zero(sizeof(bytecode_t));
+    compiler->code = calloc(1, sizeof(bytecode_t));
     if(!compiler->code)
         return E_OUTOFMEMORY;
 
@@ -2490,7 +2490,7 @@ static HRESULT init_code(compiler_ctx_t *compiler, const WCHAR *source, UINT64 s
     compiler->code->start_line = start_line;
     heap_pool_init(&compiler->code->heap);
 
-    compiler->code->source = heap_alloc((len + 1) * sizeof(WCHAR));
+    compiler->code->source = malloc((len + 1) * sizeof(WCHAR));
     if(!compiler->code->source) {
         release_bytecode(compiler->code);
         return E_OUTOFMEMORY;
@@ -2499,7 +2499,7 @@ static HRESULT init_code(compiler_ctx_t *compiler, const WCHAR *source, UINT64 s
         memcpy(compiler->code->source, source, len * sizeof(WCHAR));
     compiler->code->source[len] = 0;
 
-    compiler->code->instrs = heap_alloc(64 * sizeof(instr_t));
+    compiler->code->instrs = malloc(64 * sizeof(instr_t));
     if(!compiler->code->instrs) {
         release_bytecode(compiler->code);
         return E_OUTOFMEMORY;
@@ -2751,7 +2751,7 @@ HRESULT compile_script(script_ctx_t *ctx, const WCHAR *code, UINT64 source_conte
 
     heap_pool_init(&compiler.heap);
     hres = compile_function(&compiler, compiler.parser->source, NULL, from_eval, &compiler.code->global_code);
-    heap_free(compiler.local_scopes);
+    free(compiler.local_scopes);
     heap_pool_free(&compiler.heap);
     parser_release(compiler.parser);
     if(FAILED(hres)) {
diff --git a/dlls/jscript/date.c b/dlls/jscript/date.c
index f90a3eb052f..b1846fb3245 100644
--- a/dlls/jscript/date.c
+++ b/dlls/jscript/date.c
@@ -1924,7 +1924,7 @@ static HRESULT create_date(script_ctx_t *ctx, jsdisp_t *object_prototype, DOUBLE
 
     GetTimeZoneInformation(&tzi);
 
-    date = heap_alloc_zero(sizeof(DateInstance));
+    date = calloc(1, sizeof(DateInstance));
     if(!date)
         return E_OUTOFMEMORY;
 
@@ -1933,7 +1933,7 @@ static HRESULT create_date(script_ctx_t *ctx, jsdisp_t *object_prototype, DOUBLE
     else
         hres = init_dispex_from_constr(&date->dispex, ctx, &DateInst_info, ctx->date_constr);
     if(FAILED(hres)) {
-        heap_free(date);
+        free(date);
         return hres;
     }
 
@@ -1986,7 +1986,7 @@ static inline HRESULT date_parse(jsstr_t *input_str, double *ret) {
         else if(!nest_level) parse_len++;
     }
 
-    parse = heap_alloc((parse_len+1)*sizeof(WCHAR));
+    parse = malloc((parse_len+1)*sizeof(WCHAR));
     if(!parse)
         return E_OUTOFMEMORY;
     nest_level = 0;
@@ -2009,12 +2009,12 @@ static inline HRESULT date_parse(jsstr_t *input_str, double *ret) {
     lcid_en = MAKELCID(MAKELANGID(LANG_ENGLISH,SUBLANG_ENGLISH_US),SORT_DEFAULT);
     for(i=0; i<ARRAY_SIZE(string_ids); i++) {
         size = GetLocaleInfoW(lcid_en, string_ids[i], NULL, 0);
-        strings[i] = heap_alloc((size+1)*sizeof(WCHAR));
+        strings[i] = malloc((size+1)*sizeof(WCHAR));
         if(!strings[i]) {
             i--;
             while(i-- >= 0)
-                heap_free(strings[i]);
-            heap_free(parse);
+                free(strings[i]);
+            free(parse);
             return E_OUTOFMEMORY;
         }
         GetLocaleInfoW(lcid_en, string_ids[i], strings[i], size);
@@ -2222,8 +2222,8 @@ static inline HRESULT date_parse(jsstr_t *input_str, double *ret) {
     }
 
     for(i=0; i<ARRAY_SIZE(string_ids); i++)
-        heap_free(strings[i]);
-    heap_free(parse);
+        free(strings[i]);
+    free(parse);
 
     return S_OK;
 }
diff --git a/dlls/jscript/engine.c b/dlls/jscript/engine.c
index 7dce4fe5d79..66374a68372 100644
--- a/dlls/jscript/engine.c
+++ b/dlls/jscript/engine.c
@@ -426,7 +426,7 @@ static HRESULT scope_push(scope_chain_t *scope, jsdisp_t *jsobj, IDispatch *obj,
 {
     scope_chain_t *new_scope;
 
-    new_scope = heap_alloc(sizeof(scope_chain_t));
+    new_scope = malloc(sizeof(scope_chain_t));
     if(!new_scope)
         return E_OUTOFMEMORY;
 
@@ -463,7 +463,7 @@ void scope_release(scope_chain_t *scope)
 
     if (scope->obj)
         IDispatch_Release(scope->obj);
-    heap_free(scope);
+    free(scope);
 }
 
 static HRESULT disp_get_id(script_ctx_t *ctx, IDispatch *disp, const WCHAR *name, BSTR name_bstr, DWORD flags, DISPID *id)
@@ -1115,7 +1115,7 @@ static HRESULT interp_push_except(script_ctx_t *ctx)
 
     TRACE("\n");
 
-    except = heap_alloc(sizeof(*except));
+    except = malloc(sizeof(*except));
     if(!except)
         return E_OUTOFMEMORY;
 
@@ -1143,7 +1143,7 @@ static HRESULT interp_pop_except(script_ctx_t *ctx)
 
     finally_off = except->finally_off;
     frame->except_frame = except->next;
-    heap_free(except);
+    free(except);
 
     if(finally_off) {
         HRESULT hres;
@@ -2944,7 +2944,7 @@ static void pop_call_frame(script_ctx_t *ctx)
         IDispatch_Release(frame->this_obj);
     jsval_release(frame->ret);
     release_bytecode(frame->bytecode);
-    heap_free(frame);
+    free(frame);
 }
 
 static void print_backtrace(script_ctx_t *ctx)
@@ -3056,7 +3056,7 @@ static HRESULT unwind_exception(script_ctx_t *ctx, HRESULT exception_hres)
         except_frame->catch_off = 0;
     }else {
         frame->except_frame = except_frame->next;
-        heap_free(except_frame);
+        free(except_frame);
     }
 
     hres = stack_push(ctx, except_val);
@@ -3231,7 +3231,7 @@ HRESULT exec_source(script_ctx_t *ctx, DWORD flags, bytecode_t *bytecode, functi
     HRESULT hres;
 
     if(!ctx->stack) {
-        ctx->stack = heap_alloc(stack_size * sizeof(*ctx->stack));
+        ctx->stack = malloc(stack_size * sizeof(*ctx->stack));
         if(!ctx->stack)
             return E_OUTOFMEMORY;
     }
@@ -3331,7 +3331,7 @@ HRESULT exec_source(script_ctx_t *ctx, DWORD flags, bytecode_t *bytecode, functi
             goto fail;
     }
 
-    frame = heap_alloc_zero(sizeof(*frame));
+    frame = calloc(1, sizeof(*frame));
     if(!frame) {
         hres = E_OUTOFMEMORY;
         goto fail;
@@ -3346,7 +3346,7 @@ HRESULT exec_source(script_ctx_t *ctx, DWORD flags, bytecode_t *bytecode, functi
         hres = setup_scope(ctx, frame, scope, variable_obj, argc, argv);
         if(FAILED(hres)) {
             release_bytecode(frame->bytecode);
-            heap_free(frame);
+            free(frame);
             goto fail;
         }
     }else if(scope) {
diff --git a/dlls/jscript/enumerator.c b/dlls/jscript/enumerator.c
index f82263eaf26..cce2f2d8ec0 100644
--- a/dlls/jscript/enumerator.c
+++ b/dlls/jscript/enumerator.c
@@ -85,7 +85,7 @@ static void Enumerator_destructor(jsdisp_t *dispex)
     TRACE("\n");
 
     jsval_release(This->item);
-    heap_free(dispex);
+    free(dispex);
 }
 
 static HRESULT Enumerator_atEnd(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsigned argc, jsval_t *argv,
@@ -197,7 +197,7 @@ static HRESULT alloc_enumerator(script_ctx_t *ctx, jsdisp_t *object_prototype, E
     EnumeratorInstance *enumerator;
     HRESULT hres;
 
-    enumerator = heap_alloc_zero(sizeof(EnumeratorInstance));
+    enumerator = calloc(1, sizeof(EnumeratorInstance));
     if(!enumerator)
         return E_OUTOFMEMORY;
 
@@ -209,7 +209,7 @@ static HRESULT alloc_enumerator(script_ctx_t *ctx, jsdisp_t *object_prototype, E
 
     if(FAILED(hres))
     {
-        heap_free(enumerator);
+        free(enumerator);
         return hres;
     }
 
diff --git a/dlls/jscript/error.c b/dlls/jscript/error.c
index d309d4207d3..244d9af0532 100644
--- a/dlls/jscript/error.c
+++ b/dlls/jscript/error.c
@@ -162,7 +162,7 @@ static HRESULT alloc_error(script_ctx_t *ctx, jsdisp_t *prototype,
     jsdisp_t *err;
     HRESULT hres;
 
-    err = heap_alloc_zero(sizeof(*err));
+    err = calloc(1, sizeof(*err));
     if(!err)
         return E_OUTOFMEMORY;
 
@@ -172,7 +172,7 @@ static HRESULT alloc_error(script_ctx_t *ctx, jsdisp_t *prototype,
         hres = init_dispex_from_constr(err, ctx, &ErrorInst_info,
             constr ? constr : ctx->error_constr);
     if(FAILED(hres)) {
-        heap_free(err);
+        free(err);
         return hres;
     }
 
diff --git a/dlls/jscript/function.c b/dlls/jscript/function.c
index 8009f3a5d8b..ef76766df7d 100644
--- a/dlls/jscript/function.c
+++ b/dlls/jscript/function.c
@@ -105,11 +105,11 @@ static void Arguments_destructor(jsdisp_t *jsdisp)
         unsigned i;
         for(i = 0; i < arguments->argc; i++)
             jsval_release(arguments->buf[i]);
-        heap_free(arguments->buf);
+        free(arguments->buf);
     }
 
     jsdisp_release(&arguments->function->function.dispex);
-    heap_free(arguments);
+    free(arguments);
 }
 
 static unsigned Arguments_idx_length(jsdisp_t *jsdisp)
@@ -182,13 +182,13 @@ HRESULT setup_arguments_object(script_ctx_t *ctx, call_frame_t *frame)
     ArgumentsInstance *args;
     HRESULT hres;
 
-    args = heap_alloc_zero(sizeof(*args));
+    args = calloc(1, sizeof(*args));
     if(!args)
         return E_OUTOFMEMORY;
 
     hres = init_dispex_from_constr(&args->jsdisp, ctx, &Arguments_info, ctx->object_constr);
     if(FAILED(hres)) {
-        heap_free(args);
+        free(args);
         return hres;
     }
 
@@ -226,7 +226,7 @@ void detach_arguments_object(jsdisp_t *args_disp)
 
     /* Don't bother coppying arguments if call frame holds the last reference. */
     if(arguments->jsdisp.ref > 1) {
-        arguments->buf = heap_alloc(arguments->argc * sizeof(*arguments->buf));
+        arguments->buf = malloc(arguments->argc * sizeof(*arguments->buf));
         if(arguments->buf) {
             int i;
 
@@ -315,7 +315,7 @@ static HRESULT array_to_args(script_ctx_t *ctx, jsdisp_t *arg_array, unsigned *a
     if(FAILED(hres))
         return hres;
 
-    argv = heap_alloc(length * sizeof(*argv));
+    argv = malloc(length * sizeof(*argv));
     if(!argv)
         return E_OUTOFMEMORY;
 
@@ -326,7 +326,7 @@ static HRESULT array_to_args(script_ctx_t *ctx, jsdisp_t *arg_array, unsigned *a
         }else if(FAILED(hres)) {
             while(i--)
                 jsval_release(argv[i]);
-            heap_free(argv);
+            free(argv);
             return hres;
         }
     }
@@ -405,7 +405,7 @@ static HRESULT Function_apply(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsi
     jsval_release(this_val);
     for(i=0; i < cnt; i++)
         jsval_release(args[i]);
-    heap_free(args);
+    free(args);
     return hres;
 }
 
@@ -551,7 +551,7 @@ static void Function_destructor(jsdisp_t *dispex)
 {
     FunctionInstance *function = function_from_jsdisp(dispex);
     function->vtbl->destructor(function);
-    heap_free(function);
+    free(function);
 }
 
 static const builtin_prop_t Function_props[] = {
@@ -592,7 +592,7 @@ static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_
     FunctionInstance *function;
     HRESULT hres;
 
-    function = heap_alloc_zero(size);
+    function = calloc(1, size);
     if(!function)
         return E_OUTOFMEMORY;
 
@@ -603,7 +603,7 @@ static HRESULT create_function(script_ctx_t *ctx, const builtin_info_t *builtin_
     else
         hres = init_dispex_from_constr(&function->dispex, ctx, &FunctionInst_info, ctx->function_constr);
     if(FAILED(hres)) {
-        heap_free(function);
+        free(function);
         return hres;
     }
 
@@ -840,7 +840,7 @@ static HRESULT BindFunction_call(script_ctx_t *ctx, FunctionInstance *func, jsva
 
     call_argc = function->argc + argc;
     if(call_argc) {
-        call_args = heap_alloc(call_argc * sizeof(*call_args));
+        call_args = malloc(call_argc * sizeof(*call_args));
         if(!call_args)
             return E_OUTOFMEMORY;
 
@@ -852,7 +852,7 @@ static HRESULT BindFunction_call(script_ctx_t *ctx, FunctionInstance *func, jsva
 
     hres = function->target->vtbl->call(ctx, function->target, function->this, flags, call_argc, call_args, r);
 
-    heap_free(call_args);
+    free(call_args);
     return hres;
 }
 
@@ -936,7 +936,7 @@ static HRESULT construct_function(script_ctx_t *ctx, unsigned argc, jsval_t *arg
     static const WCHAR function_endW[] = L"\n}";
 
     if(argc) {
-        params = heap_alloc(argc*sizeof(*params));
+        params = malloc(argc*sizeof(*params));
         if(!params)
             return E_OUTOFMEMORY;
 
@@ -952,7 +952,7 @@ static HRESULT construct_function(script_ctx_t *ctx, unsigned argc, jsval_t *arg
 
     if(SUCCEEDED(hres)) {
         len += ARRAY_SIZE(function_anonymousW) + ARRAY_SIZE(function_beginW) + ARRAY_SIZE(function_endW) - 2;
-        str = heap_alloc(len*sizeof(WCHAR));
+        str = malloc(len*sizeof(WCHAR));
         if(str) {
             memcpy(str, function_anonymousW, sizeof(function_anonymousW));
             ptr = str + ARRAY_SIZE(function_anonymousW) - 1;
@@ -979,13 +979,13 @@ static HRESULT construct_function(script_ctx_t *ctx, unsigned argc, jsval_t *arg
 
     while(i)
         jsstr_release(params[--i]);
-    heap_free(params);
+    free(params);
     if(FAILED(hres))
         return hres;
 
     hres = compile_script(ctx, str, 0, 0, NULL, NULL, FALSE, FALSE,
                           ctx->call_ctx ? ctx->call_ctx->bytecode->named_item : NULL, &code);
-    heap_free(str);
+    free(str);
     if(FAILED(hres))
         return hres;
 
diff --git a/dlls/jscript/jscript.c b/dlls/jscript/jscript.c
index a138d26db3f..b020f24beb3 100644
--- a/dlls/jscript/jscript.c
+++ b/dlls/jscript/jscript.c
@@ -83,7 +83,7 @@ void script_release(script_ctx_t *ctx)
     if(ctx->last_match)
         jsstr_release(ctx->last_match);
     assert(!ctx->stack_top);
-    heap_free(ctx->stack);
+    free(ctx->stack);
 
     ctx->jscaller->ctx = NULL;
     IServiceProvider_Release(&ctx->jscaller->IServiceProvider_iface);
diff --git a/dlls/jscript/jscript.h b/dlls/jscript/jscript.h
index 94a2ff76fd7..c46dd6ed682 100644
--- a/dlls/jscript/jscript.h
+++ b/dlls/jscript/jscript.h
@@ -31,7 +31,6 @@
 
 #include "resource.h"
 
-#include "wine/heap.h"
 #include "wine/list.h"
 
 /*
diff --git a/dlls/jscript/json.c b/dlls/jscript/json.c
index d354768b486..005422be426 100644
--- a/dlls/jscript/json.c
+++ b/dlls/jscript/json.c
@@ -74,7 +74,7 @@ static HRESULT parse_json_string(json_parse_ctx_t *ctx, WCHAR **r)
     }
 
     len = ctx->ptr-ptr;
-    buf = heap_alloc((len+1)*sizeof(WCHAR));
+    buf = malloc((len+1)*sizeof(WCHAR));
     if(!buf)
         return E_OUTOFMEMORY;
     if(len)
@@ -82,7 +82,7 @@ static HRESULT parse_json_string(json_parse_ctx_t *ctx, WCHAR **r)
 
     if(!unescape(buf, &len)) {
         FIXME("unescape failed\n");
-        heap_free(buf);
+        free(buf);
         return E_FAIL;
     }
 
@@ -144,7 +144,7 @@ static HRESULT parse_json_value(json_parse_ctx_t *ctx, jsval_t *r)
 
             if(skip_spaces(ctx) != ':') {
                 FIXME("missing ':'\n");
-                heap_free(prop_name);
+                free(prop_name);
                 break;
             }
 
@@ -154,7 +154,7 @@ static HRESULT parse_json_value(json_parse_ctx_t *ctx, jsval_t *r)
                 hres = jsdisp_propput_name(obj, prop_name, val);
                 jsval_release(val);
             }
-            heap_free(prop_name);
+            free(prop_name);
             if(FAILED(hres))
                 break;
 
@@ -186,7 +186,7 @@ static HRESULT parse_json_value(json_parse_ctx_t *ctx, jsval_t *r)
 
         /* FIXME: avoid reallocation */
         str = jsstr_alloc(string);
-        heap_free(string);
+        free(string);
         if(!str)
             return E_OUTOFMEMORY;
 
@@ -435,14 +435,14 @@ typedef struct {
 static BOOL stringify_push_obj(stringify_ctx_t *ctx, jsdisp_t *obj)
 {
     if(!ctx->stack_size) {
-        ctx->stack = heap_alloc(4*sizeof(*ctx->stack));
+        ctx->stack = malloc(4*sizeof(*ctx->stack));
         if(!ctx->stack)
             return FALSE;
         ctx->stack_size = 4;
     }else if(ctx->stack_top == ctx->stack_size) {
         jsdisp_t **new_stack;
 
-        new_stack = heap_realloc(ctx->stack, ctx->stack_size*2*sizeof(*ctx->stack));
+        new_stack = realloc(ctx->stack, ctx->stack_size*2*sizeof(*ctx->stack));
         if(!new_stack)
             return FALSE;
         ctx->stack = new_stack;
@@ -471,7 +471,7 @@ static BOOL is_on_stack(stringify_ctx_t *ctx, jsdisp_t *obj)
 static BOOL append_string_len(stringify_ctx_t *ctx, const WCHAR *str, size_t len)
 {
     if(!ctx->buf_size) {
-        ctx->buf = heap_alloc(len*2*sizeof(WCHAR));
+        ctx->buf = malloc(len*2*sizeof(WCHAR));
         if(!ctx->buf)
             return FALSE;
         ctx->buf_size = len*2;
@@ -480,7 +480,7 @@ static BOOL append_string_len(stringify_ctx_t *ctx, const WCHAR *str, size_t len
         size_t new_size;
 
         new_size = ctx->buf_size * 2 + len;
-        new_buf = heap_realloc(ctx->buf, new_size*sizeof(WCHAR));
+        new_buf = realloc(ctx->buf, new_size*sizeof(WCHAR));
         if(!new_buf)
             return FALSE;
         ctx->buf = new_buf;
@@ -938,8 +938,8 @@ fail:
         jsdisp_release(obj);
     if(stringify_ctx.replacer)
         jsdisp_release(stringify_ctx.replacer);
-    heap_free(stringify_ctx.buf);
-    heap_free(stringify_ctx.stack);
+    free(stringify_ctx.buf);
+    free(stringify_ctx.stack);
     return hres;
 }
 
@@ -962,13 +962,13 @@ HRESULT create_json(script_ctx_t *ctx, jsdisp_t **ret)
     jsdisp_t *json;
     HRESULT hres;
 
-    json = heap_alloc_zero(sizeof(*json));
+    json = calloc(1, sizeof(*json));
     if(!json)
         return E_OUTOFMEMORY;
 
     hres = init_dispex_from_constr(json, ctx, &JSON_info, ctx->object_constr);
     if(FAILED(hres)) {
-        heap_free(json);
+        free(json);
         return hres;
     }
 
diff --git a/dlls/jscript/jsregexp.c b/dlls/jscript/jsregexp.c
index 15ebb113d30..fa4759b972d 100644
--- a/dlls/jscript/jsregexp.c
+++ b/dlls/jscript/jsregexp.c
@@ -149,7 +149,7 @@ HRESULT regexp_match_next(script_ctx_t *ctx, jsdisp_t *dispex,
     heap_pool_clear(mark);
 
     if(hres != S_OK && (rem_flags & REM_ALLOC_RESULT)) {
-        heap_free(match);
+        free(match);
         *ret = NULL;
     }
 
@@ -193,11 +193,11 @@ static HRESULT regexp_match(script_ctx_t *ctx, jsdisp_t *dispex, jsstr_t *jsstr,
             if(ret) {
                 match_result_t *old_ret = ret;
 
-                ret = heap_realloc(old_ret, (ret_size <<= 1) * sizeof(match_result_t));
+                ret = realloc(old_ret, (ret_size <<= 1) * sizeof(match_result_t));
                 if(!ret)
-                    heap_free(old_ret);
+                    free(old_ret);
             }else {
-                ret = heap_alloc((ret_size=4) * sizeof(match_result_t));
+                ret = malloc((ret_size=4) * sizeof(match_result_t));
             }
             if(!ret) {
                 hres = E_OUTOFMEMORY;
@@ -216,7 +216,7 @@ static HRESULT regexp_match(script_ctx_t *ctx, jsdisp_t *dispex, jsstr_t *jsstr,
 
     heap_pool_clear(mark);
     if(FAILED(hres)) {
-        heap_free(ret);
+        free(ret);
         return hres;
     }
 
@@ -545,7 +545,7 @@ static void RegExp_destructor(jsdisp_t *dispex)
         regexp_destroy(This->jsregexp);
     jsval_release(This->last_index_val);
     jsstr_release(This->str);
-    heap_free(This);
+    free(This);
 }
 
 static const builtin_prop_t RegExp_props[] = {
@@ -590,7 +590,7 @@ static HRESULT alloc_regexp(script_ctx_t *ctx, jsdisp_t *object_prototype, RegEx
     RegExpInstance *regexp;
     HRESULT hres;
 
-    regexp = heap_alloc_zero(sizeof(RegExpInstance));
+    regexp = calloc(1, sizeof(RegExpInstance));
     if(!regexp)
         return E_OUTOFMEMORY;
 
@@ -600,7 +600,7 @@ static HRESULT alloc_regexp(script_ctx_t *ctx, jsdisp_t *object_prototype, RegEx
         hres = init_dispex_from_constr(&regexp->dispex, ctx, &RegExpInst_info, ctx->regexp_constr);
 
     if(FAILED(hres)) {
-        heap_free(regexp);
+        free(regexp);
         return hres;
     }
 
@@ -780,7 +780,7 @@ HRESULT regexp_string_match(script_ctx_t *ctx, jsdisp_t *re, jsstr_t *jsstr, jsv
         break;
     }
 
-    heap_free(match_result);
+    free(match_result);
 
     if(SUCCEEDED(hres) && r)
         *r = jsval_obj(array);
diff --git a/dlls/jscript/jsstr.c b/dlls/jscript/jsstr.c
index 0d73f4be13a..a5695bbd562 100644
--- a/dlls/jscript/jsstr.c
+++ b/dlls/jscript/jsstr.c
@@ -45,7 +45,7 @@ void jsstr_free(jsstr_t *str)
 {
     switch(jsstr_tag(str)) {
     case JSSTR_HEAP:
-        heap_free(jsstr_as_heap(str)->buf);
+        free(jsstr_as_heap(str)->buf);
         break;
     case JSSTR_ROPE: {
         jsstr_rope_t *rope = jsstr_as_rope(str);
@@ -57,7 +57,7 @@ void jsstr_free(jsstr_t *str)
         break;
     }
 
-    heap_free(str);
+    free(str);
 }
 
 static inline void jsstr_init(jsstr_t *str, unsigned len, jsstr_tag_t tag)
@@ -73,7 +73,7 @@ jsstr_t *jsstr_alloc_buf(unsigned len, WCHAR **buf)
     if(len > JSSTR_MAX_LENGTH)
         return NULL;
 
-    ret = heap_alloc(FIELD_OFFSET(jsstr_inline_t, buf[len+1]));
+    ret = malloc(FIELD_OFFSET(jsstr_inline_t, buf[len+1]));
     if(!ret)
         return NULL;
 
@@ -234,7 +234,7 @@ jsstr_t *jsstr_concat(jsstr_t *str1, jsstr_t *str2)
             if(len1+len2 > JSSTR_MAX_LENGTH)
                 return NULL;
 
-            rope = heap_alloc(sizeof(*rope));
+            rope = malloc(sizeof(*rope));
             if(!rope)
                 return NULL;
 
@@ -262,7 +262,7 @@ const WCHAR *jsstr_rope_flatten(jsstr_rope_t *str)
 {
     WCHAR *buf;
 
-    buf = heap_alloc((jsstr_length(&str->str)+1) * sizeof(WCHAR));
+    buf = malloc((jsstr_length(&str->str)+1) * sizeof(WCHAR));
     if(!buf)
         return NULL;
 
diff --git a/dlls/jscript/jsutils.c b/dlls/jscript/jsutils.c
index 166fdc696b9..8c1eedf4283 100644
--- a/dlls/jscript/jsutils.c
+++ b/dlls/jscript/jsutils.c
@@ -72,12 +72,12 @@ void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
 
     if(!heap->block_cnt) {
         if(!heap->blocks) {
-            heap->blocks = heap_alloc(sizeof(void*));
+            heap->blocks = malloc(sizeof(void*));
             if(!heap->blocks)
                 return NULL;
         }
 
-        tmp = heap_alloc(block_size(0));
+        tmp = malloc(block_size(0));
         if(!tmp)
             return NULL;
 
@@ -93,12 +93,12 @@ void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
 
     if(size <= block_size(heap->last_block+1)) {
         if(heap->last_block+1 == heap->block_cnt) {
-            tmp = heap_realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
+            tmp = realloc(heap->blocks, (heap->block_cnt+1)*sizeof(void*));
             if(!tmp)
                 return NULL;
 
             heap->blocks = tmp;
-            heap->blocks[heap->block_cnt] = heap_alloc(block_size(heap->block_cnt));
+            heap->blocks[heap->block_cnt] = malloc(block_size(heap->block_cnt));
             if(!heap->blocks[heap->block_cnt])
                 return NULL;
 
@@ -110,7 +110,7 @@ void *heap_pool_alloc(heap_pool_t *heap, DWORD size)
         return heap->blocks[heap->last_block];
     }
 
-    list = heap_alloc(size + sizeof(struct list));
+    list = malloc(size + sizeof(struct list));
     if(!list)
         return NULL;
 
@@ -143,7 +143,7 @@ void heap_pool_clear(heap_pool_t *heap)
 
     while((tmp = list_head(&heap->custom_blocks))) {
         list_remove(tmp);
-        heap_free(tmp);
+        free(tmp);
     }
 
     if(WARN_ON(heap)) {
@@ -164,8 +164,8 @@ void heap_pool_free(heap_pool_t *heap)
     heap_pool_clear(heap);
 
     for(i=0; i < heap->block_cnt; i++)
-        heap_free(heap->blocks[i]);
-    heap_free(heap->blocks);
+        free(heap->blocks[i]);
+    free(heap->blocks);
 
     heap_pool_init(heap);
 }
@@ -190,7 +190,7 @@ void jsval_release(jsval_t val)
         break;
     case JSV_VARIANT:
         VariantClear(get_variant(val));
-        heap_free(get_variant(val));
+        free(get_variant(val));
         break;
     default:
         break;
@@ -203,7 +203,7 @@ static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
     HRESULT hres;
 
     __JSVAL_TYPE(*val) = JSV_VARIANT;
-    __JSVAL_VAR(*val) = v = heap_alloc(sizeof(VARIANT));
+    __JSVAL_VAR(*val) = v = malloc(sizeof(VARIANT));
     if(!v) {
         *val = jsval_undefined();
         return E_OUTOFMEMORY;
@@ -213,7 +213,7 @@ static HRESULT jsval_variant(jsval_t *val, VARIANT *var)
     hres = VariantCopy(v, var);
     if(FAILED(hres)) {
         *val = jsval_undefined();
-        heap_free(v);
+        free(v);
     }
     return hres;
 }
@@ -1023,7 +1023,7 @@ static ULONG WINAPI JSCaller_Release(IServiceProvider *iface)
 
     if(!ref) {
         assert(!This->ctx);
-        heap_free(This);
+        free(This);
     }
 
     return ref;
@@ -1056,7 +1056,7 @@ HRESULT create_jscaller(script_ctx_t *ctx)
 {
     JSCaller *ret;
 
-    ret = heap_alloc(sizeof(*ret));
+    ret = malloc(sizeof(*ret));
     if(!ret)
         return E_OUTOFMEMORY;
 
diff --git a/dlls/jscript/lex.c b/dlls/jscript/lex.c
index 695615721a7..3bb2040803d 100644
--- a/dlls/jscript/lex.c
+++ b/dlls/jscript/lex.c
@@ -820,10 +820,10 @@ void release_cc(cc_ctx_t *cc)
 
     for(iter = cc->vars; iter; iter = next) {
         next = iter->next;
-        heap_free(iter);
+        free(iter);
     }
 
-    heap_free(cc);
+    free(cc);
 }
 
 static BOOL new_cc_var(cc_ctx_t *cc, const WCHAR *name, int len, ccval_t v)
@@ -833,7 +833,7 @@ static BOOL new_cc_var(cc_ctx_t *cc, const WCHAR *name, int len, ccval_t v)
     if(len == -1)
         len = lstrlenW(name);
 
-    new_v = heap_alloc(sizeof(cc_var_t) + (len+1)*sizeof(WCHAR));
+    new_v = malloc(sizeof(cc_var_t) + (len+1)*sizeof(WCHAR));
     if(!new_v)
         return FALSE;
 
@@ -864,7 +864,7 @@ static BOOL init_cc(parser_ctx_t *ctx)
     if(ctx->script->cc)
         return TRUE;
 
-    cc = heap_alloc(sizeof(cc_ctx_t));
+    cc = malloc(sizeof(cc_ctx_t));
     if(!cc) {
         lex_error(ctx, E_OUTOFMEMORY);
         return FALSE;
diff --git a/dlls/jscript/math.c b/dlls/jscript/math.c
index 46dd58c14a4..362b877cb5e 100644
--- a/dlls/jscript/math.c
+++ b/dlls/jscript/math.c
@@ -519,13 +519,13 @@ HRESULT create_math(script_ctx_t *ctx, jsdisp_t **ret)
         {L"SQRT2",    M_SQRT2},    /* ECMA-262 3rd Edition    15.8.1.8 */
     };
 
-    math = heap_alloc_zero(sizeof(jsdisp_t));
+    math = calloc(1, sizeof(jsdisp_t));
     if(!math)
         return E_OUTOFMEMORY;
 
     hres = init_dispex_from_constr(math, ctx, &Math_info, ctx->object_constr);
     if(FAILED(hres)) {
-        heap_free(math);
+        free(math);
         return hres;
     }
 
diff --git a/dlls/jscript/number.c b/dlls/jscript/number.c
index 90c1401bad3..a5ab775a5d5 100644
--- a/dlls/jscript/number.c
+++ b/dlls/jscript/number.c
@@ -658,7 +658,7 @@ static HRESULT alloc_number(script_ctx_t *ctx, jsdisp_t *object_prototype, Numbe
     NumberInstance *number;
     HRESULT hres;
 
-    number = heap_alloc_zero(sizeof(NumberInstance));
+    number = calloc(1, sizeof(NumberInstance));
     if(!number)
         return E_OUTOFMEMORY;
 
@@ -667,7 +667,7 @@ static HRESULT alloc_number(script_ctx_t *ctx, jsdisp_t *object_prototype, Numbe
     else
         hres = init_dispex_from_constr(&number->dispex, ctx, &NumberInst_info, ctx->number_constr);
     if(FAILED(hres)) {
-        heap_free(number);
+        free(number);
         return hres;
     }
 
diff --git a/dlls/jscript/object.c b/dlls/jscript/object.c
index a675e45c4a0..4f6acacbc95 100644
--- a/dlls/jscript/object.c
+++ b/dlls/jscript/object.c
@@ -447,7 +447,7 @@ done:
 
 static void Object_destructor(jsdisp_t *dispex)
 {
-    heap_free(dispex);
+    free(dispex);
 }
 
 static const builtin_prop_t Object_props[] = {
@@ -1137,13 +1137,13 @@ HRESULT create_object(script_ctx_t *ctx, jsdisp_t *constr, jsdisp_t **ret)
     jsdisp_t *object;
     HRESULT hres;
 
-    object = heap_alloc_zero(sizeof(jsdisp_t));
+    object = calloc(1, sizeof(jsdisp_t));
     if(!object)
         return E_OUTOFMEMORY;
 
     hres = init_dispex_from_constr(object, ctx, &ObjectInst_info, constr ? constr : ctx->object_constr);
     if(FAILED(hres)) {
-        heap_free(object);
+        free(object);
         return hres;
     }
 
diff --git a/dlls/jscript/parser.y b/dlls/jscript/parser.y
index fb2e1bd5929..42d695e0846 100644
--- a/dlls/jscript/parser.y
+++ b/dlls/jscript/parser.y
@@ -1604,7 +1604,7 @@ void parser_release(parser_ctx_t *ctx)
 {
     script_release(ctx->script);
     heap_pool_free(&ctx->heap);
-    heap_free(ctx);
+    free(ctx);
 }
 
 HRESULT script_parse(script_ctx_t *ctx, struct _compiler_ctx_t *compiler, bytecode_t *code, const WCHAR *delimiter, BOOL from_eval,
@@ -1614,7 +1614,7 @@ HRESULT script_parse(script_ctx_t *ctx, struct _compiler_ctx_t *compiler, byteco
     heap_pool_t *mark;
     HRESULT hres;
 
-    parser_ctx = heap_alloc_zero(sizeof(parser_ctx_t));
+    parser_ctx = calloc(1, sizeof(parser_ctx_t));
     if(!parser_ctx)
         return E_OUTOFMEMORY;
 
diff --git a/dlls/jscript/regexp.c b/dlls/jscript/regexp.c
index 16f217bf32b..e8689c8725b 100644
--- a/dlls/jscript/regexp.c
+++ b/dlls/jscript/regexp.c
@@ -482,7 +482,7 @@ EmitREBytecode(CompilerState *state, regexp_t *re, size_t treeDepth,
     if (treeDepth == 0) {
         emitStateStack = NULL;
     } else {
-        emitStateStack = heap_alloc(sizeof(EmitStateStackEntry) * treeDepth);
+        emitStateStack = malloc(sizeof(EmitStateStackEntry) * treeDepth);
         if (!emitStateStack)
             return NULL;
     }
@@ -788,7 +788,7 @@ EmitREBytecode(CompilerState *state, regexp_t *re, size_t treeDepth,
     }
 
   cleanup:
-    heap_free(emitStateStack);
+    free(emitStateStack);
     return pc;
 
   jump_too_big:
@@ -1667,11 +1667,11 @@ ParseRegExp(CompilerState *state)
         return (state->result != NULL);
     }
 
-    operatorStack = heap_alloc(sizeof(REOpData) * operatorStackSize);
+    operatorStack = malloc(sizeof(REOpData) * operatorStackSize);
     if (!operatorStack)
         return FALSE;
 
-    operandStack = heap_alloc(sizeof(RENode *) * operandStackSize);
+    operandStack = malloc(sizeof(RENode *) * operandStackSize);
     if (!operandStack)
         goto out;
 
@@ -1762,7 +1762,7 @@ pushOperand:
                 if (operandSP == operandStackSize) {
                     RENode **tmp;
                     operandStackSize += operandStackSize;
-                    tmp = heap_realloc(operandStack, sizeof(RENode *) * operandStackSize);
+                    tmp = realloc(operandStack, sizeof(RENode *) * operandStackSize);
                     if (!tmp)
                         goto out;
                     operandStack = tmp;
@@ -1895,7 +1895,7 @@ pushOperator:
             if (operatorSP == operatorStackSize) {
                 REOpData *tmp;
                 operatorStackSize += operatorStackSize;
-                tmp = heap_realloc(operatorStack, sizeof(REOpData) * operatorStackSize);
+                tmp = realloc(operatorStack, sizeof(REOpData) * operatorStackSize);
                 if (!tmp)
                     goto out;
                 operatorStack = tmp;
@@ -1907,8 +1907,8 @@ pushOperator:
         }
     }
 out:
-    heap_free(operatorStack);
-    heap_free(operandStack);
+    free(operatorStack);
+    free(operandStack);
     return result;
 }
 
@@ -2111,7 +2111,7 @@ ProcessCharSet(REGlobalData *gData, RECharSet *charSet)
     assert(src[-1] == '[' && end[0] == ']');
 
     byteLength = (charSet->length >> 3) + 1;
-    charSet->u.bits = heap_alloc(byteLength);
+    charSet->u.bits = malloc(byteLength);
     if (!charSet->u.bits) {
         JS_ReportOutOfMemory(gData->cx);
         gData->ok = FALSE;
@@ -3184,12 +3184,12 @@ void regexp_destroy(regexp_t *re)
         UINT i;
         for (i = 0; i < re->classCount; i++) {
             if (re->classList[i].converted)
-                heap_free(re->classList[i].u.bits);
+                free(re->classList[i].u.bits);
             re->classList[i].u.bits = NULL;
         }
-        heap_free(re->classList);
+        free(re->classList);
     }
-    heap_free(re);
+    free(re);
 }
 
 regexp_t* regexp_new(void *cx, heap_pool_t *pool, const WCHAR *str,
@@ -3238,14 +3238,14 @@ regexp_t* regexp_new(void *cx, heap_pool_t *pool, const WCHAR *str,
             goto out;
     }
     resize = offsetof(regexp_t, program) + state.progLength + 1;
-    re = heap_alloc(resize);
+    re = malloc(resize);
     if (!re)
         goto out;
 
     assert(state.classBitmapsMem <= CLASS_BITMAPS_MEM_LIMIT);
     re->classCount = state.classCount;
     if (re->classCount) {
-        re->classList = heap_alloc(re->classCount * sizeof(RECharSet));
+        re->classList = malloc(re->classCount * sizeof(RECharSet));
         if (!re->classList) {
             regexp_destroy(re);
             re = NULL;
@@ -3272,7 +3272,7 @@ regexp_t* regexp_new(void *cx, heap_pool_t *pool, const WCHAR *str,
         regexp_t *tmp;
         assert((size_t)(endPC - re->program) < state.progLength + 1);
         resize = offsetof(regexp_t, program) + (endPC - re->program);
-        tmp = heap_realloc(re, resize);
+        tmp = realloc(re, resize);
         if (tmp)
             re = tmp;
     }
diff --git a/dlls/jscript/regexp.h b/dlls/jscript/regexp.h
index de86aa215c6..67cf8ecef13 100644
--- a/dlls/jscript/regexp.h
+++ b/dlls/jscript/regexp.h
@@ -72,7 +72,7 @@ static inline match_state_t* alloc_match_state(regexp_t *regexp,
     size_t size = offsetof(match_state_t, parens) + regexp->parenCount*sizeof(RECapture);
     match_state_t *ret;
 
-    ret = pool ? heap_pool_alloc(pool, size) : heap_alloc(size);
+    ret = pool ? heap_pool_alloc(pool, size) : malloc(size);
     if(!ret)
         return NULL;
 
diff --git a/dlls/jscript/set.c b/dlls/jscript/set.c
index c64a5598026..382185c82f4 100644
--- a/dlls/jscript/set.c
+++ b/dlls/jscript/set.c
@@ -134,7 +134,7 @@ static void release_map_entry(struct jsval_map_entry *entry)
     jsval_release(entry->key);
     jsval_release(entry->value);
     list_remove(&entry->list_entry);
-    heap_free(entry);
+    free(entry);
 }
 
 static void delete_map_entry(MapInstance *map, struct jsval_map_entry *entry)
@@ -159,7 +159,7 @@ static HRESULT set_map_entry(MapInstance *map, jsval_t key, jsval_t value, jsval
         jsval_release(entry->value);
         entry->value = val;
     }else {
-        if(!(entry = heap_alloc_zero(sizeof(*entry)))) return E_OUTOFMEMORY;
+        if(!(entry = calloc(1, sizeof(*entry)))) return E_OUTOFMEMORY;
 
         hres = jsval_copy(key, &entry->key);
         if(SUCCEEDED(hres)) {
@@ -168,7 +168,7 @@ static HRESULT set_map_entry(MapInstance *map, jsval_t key, jsval_t value, jsval
                 jsval_release(entry->key);
         }
         if(FAILED(hres)) {
-            heap_free(entry);
+            free(entry);
             return hres;
         }
         grab_map_entry(entry);
@@ -366,7 +366,7 @@ static void Map_destructor(jsdisp_t *dispex)
         release_map_entry(entry);
     }
 
-    heap_free(map);
+    free(map);
 }
 static const builtin_prop_t Map_prototype_props[] = {
     {L"clear",      Map_clear,     PROPF_METHOD},
@@ -411,7 +411,7 @@ static HRESULT Map_constructor(script_ctx_t *ctx, jsval_t vthis, WORD flags, uns
 
         if(!r)
             return S_OK;
-        if(!(map = heap_alloc_zero(sizeof(*map))))
+        if(!(map = calloc(1, sizeof(*map))))
             return E_OUTOFMEMORY;
 
         hres = init_dispex(&map->dispex, ctx, &Map_info, ctx->map_prototype);
@@ -563,7 +563,7 @@ static HRESULT Set_constructor(script_ctx_t *ctx, jsval_t vthis, WORD flags, uns
 
         if(!r)
             return S_OK;
-        if(!(set = heap_alloc_zero(sizeof(*set))))
+        if(!(set = calloc(1, sizeof(*set))))
             return E_OUTOFMEMORY;
 
         hres = init_dispex(&set->dispex, ctx, &Set_info, ctx->set_prototype);
diff --git a/dlls/jscript/string.c b/dlls/jscript/string.c
index dac89c9d8a9..254ead61eef 100644
--- a/dlls/jscript/string.c
+++ b/dlls/jscript/string.c
@@ -362,7 +362,7 @@ static HRESULT String_concat(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsig
         jsstr_t **strs;
         WCHAR *ptr;
 
-        strs = heap_alloc_zero(str_cnt * sizeof(*strs));
+        strs = calloc(str_cnt, sizeof(*strs));
         if(!strs) {
             jsstr_release(str);
             return E_OUTOFMEMORY;
@@ -397,7 +397,7 @@ static HRESULT String_concat(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsig
 
         while(i--)
             jsstr_release(strs[i]);
-        heap_free(strs);
+        free(strs);
         if(FAILED(hres))
             return hres;
     }
@@ -628,9 +628,9 @@ static BOOL strbuf_ensure_size(strbuf_t *buf, unsigned len)
     if(new_size < len)
         new_size = len;
     if(buf->buf)
-        new_buf = heap_realloc(buf->buf, new_size*sizeof(WCHAR));
+        new_buf = realloc(buf->buf, new_size*sizeof(WCHAR));
     else
-        new_buf = heap_alloc(new_size*sizeof(WCHAR));
+        new_buf = malloc(new_size*sizeof(WCHAR));
     if(!new_buf)
         return FALSE;
 
@@ -673,7 +673,7 @@ static HRESULT rep_call(script_ctx_t *ctx, jsdisp_t *func,
     HRESULT hres = S_OK;
 
     argc = match->paren_count+3;
-    argv = heap_alloc_zero(sizeof(*argv)*argc);
+    argv = calloc(argc, sizeof(*argv));
     if(!argv)
         return E_OUTOFMEMORY;
 
@@ -706,7 +706,7 @@ static HRESULT rep_call(script_ctx_t *ctx, jsdisp_t *func,
 
     for(i=0; i <= match->paren_count; i++)
         jsstr_release(get_string(argv[i]));
-    heap_free(argv);
+    free(argv);
 
     if(FAILED(hres))
         return hres;
@@ -909,7 +909,7 @@ static HRESULT String_replace(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsi
     if(match_str)
         jsstr_release(match_jsstr);
     if(regexp)
-        heap_free(match);
+        free(match);
 
     if(SUCCEEDED(hres) && last_match.cp && regexp) {
         jsstr_release(ctx->last_match);
@@ -933,7 +933,7 @@ static HRESULT String_replace(script_ctx_t *ctx, jsval_t vthis, WORD flags, unsi
         *r = jsval_string(ret_str);
     }
 
-    heap_free(ret.buf);
+    free(ret.buf);
     return hres;
 }
 
@@ -1500,7 +1500,7 @@ static void String_destructor(jsdisp_t *dispex)
     StringInstance *This = string_from_jsdisp(dispex);
 
     jsstr_release(This->str);
-    heap_free(This);
+    free(This);
 }
 
 static unsigned String_idx_length(jsdisp_t *jsdisp)
@@ -1681,7 +1681,7 @@ static HRESULT string_alloc(script_ctx_t *ctx, jsdisp_t *object_prototype, jsstr
     StringInstance *string;
     HRESULT hres;
 
-    string = heap_alloc_zero(sizeof(StringInstance));
+    string = calloc(1, sizeof(StringInstance));
     if(!string)
         return E_OUTOFMEMORY;
 
@@ -1690,7 +1690,7 @@ static HRESULT string_alloc(script_ctx_t *ctx, jsdisp_t *object_prototype, jsstr
     else
         hres = init_dispex_from_constr(&string->dispex, ctx, &StringInst_info, ctx->string_constr);
     if(FAILED(hres)) {
-        heap_free(string);
+        free(string);
         return hres;
     }
 
diff --git a/dlls/jscript/vbarray.c b/dlls/jscript/vbarray.c
index d55e90d0bbf..998dc230818 100644
--- a/dlls/jscript/vbarray.c
+++ b/dlls/jscript/vbarray.c
@@ -73,20 +73,20 @@ static HRESULT VBArray_getItem(script_ctx_t *ctx, jsval_t vthis, WORD flags, uns
     if(argc < SafeArrayGetDim(vbarray->safearray))
         return JS_E_SUBSCRIPT_OUT_OF_RANGE;
 
-    indexes = heap_alloc(sizeof(indexes[0])*argc);
+    indexes = malloc(sizeof(indexes[0])*argc);
     if(!indexes)
         return E_OUTOFMEMORY;
 
     for(i=0; i<argc; i++) {
         hres = to_long(ctx, argv[i], indexes + i);
         if(FAILED(hres)) {
-            heap_free(indexes);
+            free(indexes);
             return hres;
         }
     }
 
     hres = SafeArrayGetElement(vbarray->safearray, indexes, (void*)&out);
-    heap_free(indexes);
+    free(indexes);
     if(hres == DISP_E_BADINDEX)
         return JS_E_SUBSCRIPT_OUT_OF_RANGE;
     else if(FAILED(hres))
@@ -235,7 +235,7 @@ static void VBArray_destructor(jsdisp_t *dispex)
     VBArrayInstance *vbarray = vbarray_from_jsdisp(dispex);
 
     SafeArrayDestroy(vbarray->safearray);
-    heap_free(vbarray);
+    free(vbarray);
 }
 
 static const builtin_prop_t VBArray_props[] = {
@@ -260,7 +260,7 @@ static HRESULT alloc_vbarray(script_ctx_t *ctx, jsdisp_t *object_prototype, VBAr
     VBArrayInstance *vbarray;
     HRESULT hres;
 
-    vbarray = heap_alloc_zero(sizeof(VBArrayInstance));
+    vbarray = calloc(1, sizeof(VBArrayInstance));
     if(!vbarray)
         return E_OUTOFMEMORY;
 
@@ -270,7 +270,7 @@ static HRESULT alloc_vbarray(script_ctx_t *ctx, jsdisp_t *object_prototype, VBAr
         hres = init_dispex_from_constr(&vbarray->dispex, ctx, &VBArray_info, ctx->vbarray_constr);
 
     if(FAILED(hres)) {
-        heap_free(vbarray);
+        free(vbarray);
         return hres;
     }