Update cppcheck (#5108)

Re-enable cppcheck CI job

Update cppcheck suppression list:
    The new version of cppcheck raises warnings for many potential
    issues that are guarded against, so those warnings have been
    supressed.

Handle realloc failures:
    - jerry-ext/util/sources.c
    - jerry-port/common/jerry-port-io.c

Refactor test-snapshot: move each test to separate functions like some
others already were.

Rename `handler` variables inside `main` of `test-api.c` as they
shadowed the `handler` function in the same file.

JerryScript-DCO-1.0-Signed-off-by: Máté Tokodi mate.tokodi@szteszoftver.hu

.github/workflows/gh-actions.yml

@@ -17,8 +17,8 @@ jobs:
           python-version: '3.10'
       - run: sudo apt update
 # TODO: update checkers to current versions available in ubuntu 22.04
-#      - run: sudo apt install clang-format-10 cppcheck python-serial
-      - run: sudo apt install pylint doxygen
+#      - run: sudo apt install clang-format-10 python-serial
+      - run: sudo apt install pylint doxygen cppcheck
       - run: $RUNNER --check-signed-off=gh-actions
         if: ${{ always() }}
       - run: $RUNNER --check-doxygen
@@ -31,8 +31,8 @@ jobs:
 #        if: ${{ always() }}
       - run: $RUNNER --check-pylint
         if: ${{ always() }}
-#      - run: $RUNNER --check-cppcheck
-#        if: ${{ always() }}
+      - run: $RUNNER --check-cppcheck
+        if: ${{ always() }}
 
   Linux_x86-64_Build_Correctness_Debugger_Tests:
     runs-on: ubuntu-latest

jerry-core/ecma/base/ecma-helpers-errol.c

@@ -143,24 +143,24 @@ ecma_errol0_dtoa (double val, /**< ecma number */
                   int32_t *exp_p) /**< [out] exponent */
 {
   double power_of_10 = 1.0;
-  int32_t exp = 1;
+  int32_t exponent = 1;
 
   /* normalize the midpoint */
   ecma_high_prec_t mid;
 
   mid.value = val;
   mid.offset = 0.0;
 
-  while (((mid.value > 10.0) || ((mid.value == 10.0) && (mid.offset >= 0.0))) && (exp < 308))
+  while (((mid.value > 10.0) || ((mid.value == 10.0) && (mid.offset >= 0.0))) && (exponent < 308))
   {
-    exp++;
+    exponent++;
     ecma_divide_high_prec_by_10 (&mid);
     power_of_10 /= 10.0;
   }
 
-  while (((mid.value < 1.0) || ((mid.value == 1.0) && (mid.offset < 0.0))) && (exp > -307))
+  while (((mid.value < 1.0) || ((mid.value == 1.0) && (mid.offset < 0.0))) && (exponent > -307))
   {
-    exp--;
+    exponent--;
     ecma_multiply_high_prec_by_10 (&mid);
     power_of_10 *= 10.0;
   }
@@ -185,14 +185,14 @@ ecma_errol0_dtoa (double val, /**< ecma number */
 
   while (high_bound.value > 10.0 || (high_bound.value == 10.0 && (high_bound.offset >= 0.0)))
   {
-    exp++;
+    exponent++;
     ecma_divide_high_prec_by_10 (&high_bound);
     ecma_divide_high_prec_by_10 (&low_bound);
   }
 
   while (high_bound.value < 1.0 || (high_bound.value == 1.0 && (high_bound.offset < 0.0)))
   {
-    exp--;
+    exponent--;
     ecma_multiply_high_prec_by_10 (&high_bound);
     ecma_multiply_high_prec_by_10 (&low_bound);
   }
@@ -234,7 +234,7 @@ ecma_errol0_dtoa (double val, /**< ecma number */
   double mdig = (high_bound.value + low_bound.value) / 2.0 + 0.5;
   *dst_p++ = (lit_utf8_byte_t) ('0' + (uint8_t) mdig);
 
-  *exp_p = exp;
+  *exp_p = exponent;
 
   return (lit_utf8_size_t) (dst_p - buffer_p);
 } /* ecma_errol0_dtoa */

jerry-ext/handle-scope/handle-scope.c

@@ -254,10 +254,7 @@ jerryx_escape_handle_internal (jerryx_escapable_handle_scope scope,
      * Escape handle to parent scope
      */
     *result = jerryx_handle_scope_add_handle_to (found_handle, parent);
-  }
 
-  if (should_promote)
-  {
     scope->escaped = true;
   }
   return jerryx_handle_scope_ok;

jerry-ext/util/sources.c

@@ -146,6 +146,10 @@ jerryx_source_exec_stdin (void)
 
     jerry_size_t new_size = source_size + line_size;
     source_p = realloc (source_p, new_size);
+    if (source_p == NULL)
+    {
+      return jerry_throw_sz (JERRY_ERROR_COMMON, "Out of memory.");
+    }
 
     memcpy (source_p + source_size, line_p, line_size);
     jerry_port_line_free (line_p);

jerry-port/common/jerry-port-io.c

@@ -71,6 +71,10 @@ jerry_port_line_read (jerry_size_t *out_size_p)
   {
     allocated += 64;
     line_p = realloc (line_p, allocated);
+    if (line_p == NULL)
+    {
+      jerry_port_fatal (JERRY_FATAL_OUT_OF_MEMORY);
+    }
 
     while (bytes < allocated - 1)
     {

tests/unit-core/test-api.c

@@ -709,12 +709,12 @@ main (void)
   if (jerry_feature_enabled (JERRY_FEATURE_PROXY))
   {
     jerry_value_t target = jerry_object ();
-    jerry_value_t handler = jerry_object ();
-    jerry_value_t proxy = jerry_proxy (target, handler);
+    jerry_value_t proxy_handler = jerry_object ();
+    jerry_value_t proxy = jerry_proxy (target, proxy_handler);
     jerry_value_t obj_proto = jerry_eval ((jerry_char_t *) "Object.prototype", 16, JERRY_PARSE_NO_OPTS);
 
     jerry_value_free (target);
-    jerry_value_free (handler);
+    jerry_value_free (proxy_handler);
     proto_val = jerry_object_proto (proxy);
     TEST_ASSERT (!jerry_value_is_exception (proto_val));
     TEST_ASSERT (proto_val == obj_proto);
@@ -745,8 +745,8 @@ main (void)
   if (jerry_feature_enabled (JERRY_FEATURE_PROXY))
   {
     jerry_value_t target = jerry_object ();
-    jerry_value_t handler = jerry_object ();
-    jerry_value_t proxy = jerry_proxy (target, handler);
+    jerry_value_t proxy_handler = jerry_object ();
+    jerry_value_t proxy = jerry_proxy (target, proxy_handler);
     new_proto = jerry_eval ((jerry_char_t *) "Function.prototype", 18, JERRY_PARSE_NO_OPTS);
 
     res = jerry_object_set_proto (proxy, new_proto);
@@ -755,7 +755,7 @@ main (void)
     TEST_ASSERT (target_proto == new_proto);
 
     jerry_value_free (target);
-    jerry_value_free (handler);
+    jerry_value_free (proxy_handler);
     jerry_value_free (proxy);
     jerry_value_free (new_proto);
     jerry_value_free (target_proto);