[BugFix] fix bignum's overflow

issue: f-5925102193

Author: pandazyp

src/interpreter/quickjs/source/bignum.cc

@@ -1040,7 +1040,8 @@ int js_bigint_cmp(LEPUSContext *ctx, const JSBigInt *a, const JSBigInt *b) {
    = 10, 2, 8 or 16. */
 JSBigInt *js_bigint_from_string(LEPUSContext *ctx, const char *str, int radix) {
   const char *p = str;
-  int is_neg, n_digits, n_limbs, len, log2_radix, n_bits, i;
+  int is_neg, log2_radix;
+  size_t n_digits, n_bits, len, i, n_limbs;
   JSBigInt *r;
   js_limb_t v, c, h;
 

src/interpreter/quickjs/source/quickjs.cc

@@ -13618,7 +13618,7 @@ QJS_STATIC LEPUSValue js_call_c_function(LEPUSContext *ctx,
   if (unlikely(argc < arg_count)) {
     /* ensure that at least argc_count arguments are readable */
 #ifdef ENABLE_VIRTUAL_STACK
-    size_t alloca_size = sizeof(arg_buf[0]) * arg_count;
+    alloca_size = sizeof(arg_buf[0]) * arg_count;
     arg_buf = js_get_virtual_sp(alloca_size);
     if (!arg_buf) {
       return JS_ThrowStackOverflow(ctx);

testing/quickjs/compiler/qjs.cc

@@ -167,18 +167,20 @@ int main(int argc, char **argv) {
   lepus_std_add_helpers(ctx, 0, NULL);
 
   LEPUSValue global_obj = LEPUS_GetGlobalObject(ctx);
-  LEPUSValue cfunc = LEPUS_NewCFunction(ctx, js_std_load_file, "read", 1);
-  HandleScope func_scope(ctx, &cfunc, HANDLE_TYPE_LEPUS_VALUE);
-  LEPUS_SetPropertyStr(ctx, global_obj, "read", cfunc);
-  cfunc = LEPUS_NewCFunction(
-      ctx,
-      [](LEPUSContext *ctx, LEPUSValue this_obj, int32_t argc,
-         LEPUSValue *argv) {
-        LEPUS_RunGC(LEPUS_GetRuntime(ctx));
-        return LEPUS_UNDEFINED;
-      },
-      "", 0);
-  LEPUS_SetPropertyStr(ctx, global_obj, "gc", cfunc);
+  {
+    LEPUSValue cfunc = LEPUS_NewCFunction(ctx, js_std_load_file, "read", 1);
+    HandleScope func_scope(ctx, &cfunc, HANDLE_TYPE_LEPUS_VALUE);
+    LEPUS_SetPropertyStr(ctx, global_obj, "read", cfunc);
+    cfunc = LEPUS_NewCFunction(
+        ctx,
+        [](LEPUSContext *ctx, LEPUSValue this_obj, int32_t argc,
+           LEPUSValue *argv) {
+          LEPUS_RunGC(LEPUS_GetRuntime(ctx));
+          return LEPUS_UNDEFINED;
+        },
+        "", 0);
+    LEPUS_SetPropertyStr(ctx, global_obj, "gc", cfunc);
+  }
   if (!LEPUS_IsGCMode(ctx)) {
     LEPUS_FreeValue(ctx, global_obj);
   }

testing/quickjs/compiler/test_common.cc

@@ -1467,4 +1467,19 @@ TEST_F(CommonQjsTest, NotAFunctionException) {
   }
 }
 
+TEST_F(CommonQjsTest, BigIntOverFlow) {
+  std::string src = R"(
+    const len = 79536432;
+    console.log("Creating string of length " + len);
+    let digits = '1'.repeat(len);
+    console.log("String created. Calling BigInt().");
+    let b = BigInt(digits); // Radix 10
+    console.log("BigInt created.");
+  )";
+
+  auto ret = LEPUS_Eval(ctx_, src.c_str(), src.size(), "test.js",
+                        LEPUS_EVAL_TYPE_GLOBAL);
+  if (!ctx_->gc_enable) LEPUS_FreeValue(ctx_, ret);
+}
+
 }  // namespace common_qjs_test