Fix few integer overflowing (#4161)

- fix(interpreter): correct offset calculations in wasm_loader_get_const_offset function
- fix(mem-alloc): update offset calculation in gc_migrate for memory migration
- add pointer-overflow sanitizer

tests/wamr-test-suites/spec-test-script/runtest.py

@@ -1575,7 +1575,8 @@ if __name__ == "__main__":
         try:
             if not opts.no_cleanup:
                 # remove the files under /tempfiles/ and copy of .wasm files
-                log(f"Removing {temp_file_repo}")
+                log(f"Removing tmp*")
+                # log(f"Removing {temp_file_repo}")
 
                 for t in temp_file_repo:
                     # None and empty
@@ -1585,7 +1586,8 @@ if __name__ == "__main__":
                     if os.path.exists(t):
                         os.remove(t)
             else:
-                log(f"Leaving {temp_file_repo}")
+                log(f"Leaving tmp*")
+                # log(f"Leaving {temp_file_repo}")
             
         except Exception as e:
             print("Failed to remove tempfiles: %s" % e)

tests/wamr-test-suites/test_wamr.sh

@@ -39,7 +39,7 @@ function help()
     echo "-F set the firmware path used by qemu"
     echo "-C enable code coverage collect"
     echo "-j set the platform to test"
-    echo "-T set sanitizer to use in tests(ubsan|tsan|asan)"
+    echo "-T set sanitizer to use in tests(ubsan|tsan|asan|posan)"
     echo "-A use the specified wamrc command instead of building it"
     echo "-r [requirement name] [N [N ...]] specify a requirement name followed by one or more"
     echo "                                  subrequirement IDs, if no subrequirement is specificed,"
@@ -1035,6 +1035,11 @@ function trigger()
         EXTRA_COMPILE_FLAGS+=" -DWAMR_BUILD_SANITIZER=tsan"
     fi
 
+    if [[ "$WAMR_BUILD_SANITIZER" == "posan" ]]; then
+        echo "Setting run with posan"
+        EXTRA_COMPILE_FLAGS+=" -DWAMR_BUILD_SANITIZER=posan"
+    fi
+
     # Make sure we're using the builtin WASI libc implementation
     # if we're running the wasi certification tests.
     if [[ $TEST_CASE_ARR ]]; then