Add embedded jdk support for s390x

This patch follows a similar approach used in PR
bazelbuild#11436 to add support
for embedding OpenJDK in bazel on s390x.

Similar to ppc, the openjdk used will be downloadded from adoptopenjdk website.

Another thing this PR does is to provide the cached version of
allmodules_jdk and minimal_jdk zip files built on s390x. I have
tested by linking the files locally on s390x and with these zip files provided,
tests no longer fail with java exec format error on s390x.

WORKSPACE

@@ -360,6 +360,29 @@ http_file(
     ],
 )
 
+http_file(
+    name = "openjdk_linux_s390x",
+    downloaded_file_path = "adoptopenjdk-s390x.tar.gz",
+    sha256 = "c74dd2803dca8185e0a74d9ab47442454e0c500bcbdfaf485bfc90b4d87aee2b",
+    urls = ["file:///home/peterbao/allmodules_jdk.tar.gz"],
+)
+
+http_file(
+    name = "openjdk_linux_s390x_minimal",
+    downloaded_file_path = "adoptopenjdk-s390x-minimal.tar.gz",
+    sha256 = "fe9403e956a87b0d8fc7ad55a841d6e4718d364603d652d9443d59c0b3544553",
+    urls = ["file:///home/peterbao/minimal_jdk.tar.gz"],
+)
+
+http_file(
+    name = "openjdk_linux_s390x_vanilla",
+    downloaded_file_path="adoptopenjdk-s390x-vanilla.tar.gz",
+    sha256 = "d9b72e87a1d3ebc0c9552f72ae5eb150fffc0298a7cb841f1ce7bfc70dcd1059",
+    urls = [
+        "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.7%2B10/OpenJDK11U-jdk_s390x_linux_hotspot_11.0.7_10.tar.gz",
+    ],
+)
+
 http_file(
     name = "openjdk_macos",
     downloaded_file_path = "zulu-macos.tar.gz",
@@ -758,6 +781,19 @@ http_archive(
     ],
 )
 
+# This must be kept in sync with src/main/java/com/google/devtools/build/lib/bazel/rules/java/jdk.WORKSPACE.
+http_archive(
+    name = "remotejdk11_linux_s390x_for_testing",
+    build_file = "@local_jdk//:BUILD.bazel",
+    patch_cmds = EXPORT_WORKSPACE_IN_BUILD_BAZEL_FILE,
+    patch_cmds_win = EXPORT_WORKSPACE_IN_BUILD_BAZEL_FILE_WIN,
+    sha256 = "d9b72e87a1d3ebc0c9552f72ae5eb150fffc0298a7cb841f1ce7bfc70dcd1059",
+    strip_prefix = "jdk-11.0.7+10",
+    urls = [
+        "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.7%2B10/OpenJDK11U-jdk_s390x_linux_hotspot_11.0.7_10.tar.gz",
+    ],
+)
+
 # This must be kept in sync with src/main/java/com/google/devtools/build/lib/bazel/rules/java/jdk.WORKSPACE.
 http_archive(
     name = "remotejdk11_macos_for_testing",

src/BUILD

@@ -182,6 +182,9 @@ filegroup(
         "//src/conditions:linux_aarch64": [
             "@openjdk_linux_aarch64//file",
         ],
+        "//src/conditions:linux_s390x": [
+            "@openjdk_linux_s390x//file",
+        ],
         "//conditions:default": [
             "@openjdk_linux//file",
         ],
@@ -204,6 +207,9 @@ filegroup(
         "//src/conditions:linux_aarch64": [
             "@openjdk_linux_aarch64_minimal//file",
         ],
+        "//src/conditions:linux_s390x": [
+            "@openjdk_linux_s390x_minimal//file",
+        ],
         "//conditions:default": [
             "@openjdk_linux_minimal//file",
         ],
@@ -229,6 +235,9 @@ filegroup(
         "//src/conditions:linux_ppc64le": [
             "@openjdk_linux_ppc64le_vanilla//file",
         ],
+        "//src/conditions:linux_s390x": [
+            "@openjdk_linux_s390x_vanilla//file",
+        ],
         "//conditions:default": [
             "@openjdk_linux_vanilla//file",
         ],
@@ -765,6 +774,7 @@ filegroup(
         "@remotejdk11_linux_aarch64_for_testing//:WORKSPACE",
         "@remotejdk11_linux_for_testing//:WORKSPACE",
         "@remotejdk11_linux_ppc64le_for_testing//:WORKSPACE",
+        "@remotejdk11_linux_s390x_for_testing//:WORKSPACE",
         "@remotejdk11_macos_for_testing//:WORKSPACE",
         "@remotejdk11_win_for_testing//:WORKSPACE",
         "@remotejdk14_linux_for_testing//:WORKSPACE",

src/main/java/com/google/devtools/build/lib/bazel/rules/java/jdk.WORKSPACE

@@ -130,6 +130,18 @@ maybe(
     ],
 )
 
+# This must be kept in sync with the top-level WORKSPACE file.
+maybe(
+    http_archive,
+    name = "remotejdk11_linux_s390x",
+    build_file = "@local_jdk//:BUILD.bazel",
+    sha256 = "d9b72e87a1d3ebc0c9552f72ae5eb150fffc0298a7cb841f1ce7bfc70dcd1059",
+    strip_prefix = "jdk-11.0.7+10",
+    urls = [
+        "https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.7%2B10/OpenJDK11U-jdk_s390x_linux_hotspot_11.0.7_10.tar.gz",
+    ],
+)
+
 # This must be kept in sync with the top-level WORKSPACE file.
 maybe(
     http_archive,

src/minimize_jdk.sh

@@ -31,7 +31,7 @@ fi
 fulljdk=$1
 out=$3
 ARCH=`uname -p`
-if [[ "${ARCH}" == 'ppc64le' ]]; then
+if [[ "${ARCH}" == 'ppc64le'  ]] || [[ "${ARCH}" == 's390x' ]]; then
   FULL_JDK_DIR="jdk*"
   DOCS=""
 else

src/test/py/bazel/test_base.py

@@ -59,6 +59,7 @@ class TestBase(unittest.TestCase):
       'remotejdk11_linux_for_testing',
       'remotejdk11_linux_aarch64_for_testing',
       'remotejdk11_linux_ppc64le_for_testing',
+      'remotejdk11_linux_s390x_for_testing',
       'remotejdk11_macos_for_testing',
       'remotejdk11_win_for_testing',
       'remotejdk14_linux_for_testing',

src/test/shell/testenv.sh

@@ -297,6 +297,7 @@ EOF
         "remotejdk11_linux_for_testing"
         "remotejdk11_linux_aarch64_for_testing"
         "remotejdk11_linux_ppc64le_for_testing"
+        "remotejdk11_linux_s390x_for_testing"
         "remotejdk11_macos_for_testing"
         "remotejdk11_win_for_testing"
         "remotejdk14_linux_for_testing"

tools/jdk/BUILD

@@ -504,6 +504,7 @@ alias(
             "//src/conditions:linux_aarch64": "@remotejdk11_linux_aarch64//:jdk",
             "//src/conditions:linux_x86_64": "@remotejdk11_linux//:jdk",
             "//src/conditions:linux_ppc64le": "@remotejdk11_linux_ppc64le//:jdk",
+            "//src/conditions:linux_s390x": "@remotejdk11_linux_s390x//:jdk",
         },
         no_match_error = "Could not find a JDK for host execution environment, please explicitly" +
                          " provide one using `--host_javabase.`",