Add wasm64_gb test config (#19957)

This test configuration sets GLOBAL_BASE to 4gb meaning that all memory
addresses used by emscripten will be larger then 4gb

Author: sbc100

.circleci/config.yml

@@ -606,6 +606,7 @@ jobs:
           title: "wasm64"
           test_targets: "
             wasm64
+            wasm64_4gb.test_hello_world
             wasm64l.test_bigswitch
             other.test_memory64_proxies
             other.test_failing_growth_wasm64"

test/test_core.py

@@ -9800,6 +9800,13 @@ def setUp(self):
                   settings={'MEMORY64': 1}, require_wasm64=True, require_node=True)
 wasm64_v8 = make_run('wasm64_v8', emcc_args=['-Wno-experimental', '--profiling-funcs'],
                      settings={'MEMORY64': 1}, require_wasm64=True, require_v8=True)
+# Run the wasm64 tests with all memory offsets > 4gb.  Be careful running this test
+# suite with any kind of parallelism.
+wasm64_4gb = make_run('wasm64_4gb', emcc_args=['-Wno-experimental', '--profiling-funcs'],
+                      settings={'MEMORY64': 1, 'INITIAL_MEMORY': '4200mb',
+                                'MAXIMUM_MEMORY': '4200mb', # TODO(sbc): should not be needed
+                                'GLOBAL_BASE': '4gb'},
+                      require_wasm64=True)
 # MEMORY64=2, or "lowered"
 wasm64l = make_run('wasm64l', emcc_args=['-O1', '-Wno-experimental', '--profiling-funcs'],
                    settings={'MEMORY64': 2},