Extend isolate stress testing to ARM64.

Cq-Include-Trybots: luci.dart.try:iso-stress-linux-try
Change-Id: Ie0c2a281a4edc570b6532faadf01f06be259fd18
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/400144
Reviewed-by: Alexander Aprelev <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: rmacnak-google

tools/bots/test_matrix.json

@@ -3575,7 +3575,9 @@
     },
     {
       "builders": [
-        "iso-stress-linux"
+        "iso-stress-linux",
+        "iso-stress-linux-x64",
+        "iso-stress-linux-arm64"
       ],
       "meta": {
         "description": "This configuration is used for isolate stress testing."
@@ -3586,7 +3588,6 @@
           "script": "tools/build.py",
           "arguments": [
             "--mode=debug,release",
-            "--arch=x64",
             "runtime",
             "dartaotruntime"
           ]
@@ -3596,40 +3597,39 @@
           "script": "tools/build.py",
           "arguments": [
             "--mode=release",
-            "--arch=x64",
             "--sanitizer=tsan",
             "runtime",
             "dartaotruntime"
           ]
         },
         {
           "name": "Generate Isolate Stress Test",
-          "script": "out/ReleaseX64/dart",
+          "script": "${build_root}/dart",
           "arguments": [
             "runtime/tests/concurrency/generate_stress_test.dart"
           ]
         },
         {
           "name": "Generate Isolate Stress Test - JIT Dill",
-          "script": "out/ReleaseX64/dart",
+          "script": "${build_root}/dart",
           "arguments": [
             "pkg/vm/bin/gen_kernel.dart",
-            "--platform=out/ReleaseX64/vm_platform_strong.dill",
+            "--platform=${build_root}/vm_platform_strong.dill",
             "--no-aot",
-            "-Dtest_runner.configuration=vm-linux-release-x64",
+            "-Dtest_runner.configuration=vm-linux-release-${arch}",
             "-o",
             "runtime/tests/concurrency/generated_stress_test.dart.jit.dill",
             "runtime/tests/concurrency/generated_stress_test.dart"
           ]
         },
         {
           "name": "Generate Isolate Stress Test - AOT Dill",
-          "script": "out/ReleaseX64/dart",
+          "script": "${build_root}/dart",
           "arguments": [
             "pkg/vm/bin/gen_kernel.dart",
-            "--platform=out/ReleaseX64/vm_platform_strong.dill",
+            "--platform=${build_root}/vm_platform_strong.dill",
             "--aot",
-            "-Dtest_runner.configuration=vm-aot-linux-release-x64",
+            "-Dtest_runner.configuration=vm-aot-linux-release-${arch}",
             "-o",
             "runtime/tests/concurrency/generated_stress_test.dart.aot.dill",
             "runtime/tests/concurrency/generated_stress_test.dart"
@@ -3639,7 +3639,7 @@
           "name": "Run Isolate Stress Tests",
           "script": "tools/run_with_coredumps_enabled.py",
           "arguments": [
-            "out/ReleaseX64/dart",
+            "${build_root}/dart",
             "runtime/tests/concurrency/run_stress_test_shards.dart",
             "--copy-coredumps"
           ],