[pull] main from llvm:main

.ci/compute_projects.py

@@ -49,8 +49,7 @@
         "flang",
     },
     "lld": {"bolt", "cross-project-tests"},
-    # TODO(issues/132795): LLDB should be enabled on clang changes.
-    "clang": {"clang-tools-extra", "cross-project-tests"},
+    "clang": {"clang-tools-extra", "cross-project-tests", "lldb"},
     "mlir": {"flang"},
     # Test everything if ci scripts are changed.
     ".ci": {
@@ -80,6 +79,7 @@
     "clang": {"compiler-rt"},
     "clang-tools-extra": {"libc"},
     "libc": {"libc"},
+    "compiler-rt": {"compiler-rt"},
     ".ci": {"compiler-rt", "libc"},
 }
 DEPENDENT_RUNTIMES_TO_TEST_NEEDS_RECONFIG = {
@@ -100,6 +100,9 @@
     "libc",  # No Windows Support.
     "lldb",  # TODO(issues/132800): Needs environment setup.
     "bolt",  # No Windows Support.
+    "libcxx",
+    "libcxxabi",
+    "libunwind",
 }
 
 # These are projects that we should test if the project itself is changed but
@@ -118,6 +121,9 @@
     "lldb",
     "openmp",
     "polly",
+    "libcxx",
+    "libcxxabi",
+    "libunwind",
 }
 
 PROJECT_CHECK_TARGETS = {

.ci/compute_projects_test.py

@@ -45,16 +45,14 @@ def test_llvm_windows(self):
             env_variables["project_check_targets"],
             "check-clang check-clang-tools check-lld check-llvm check-mlir check-polly",
         )
-        self.assertEqual(
-            env_variables["runtimes_to_build"], "libcxx;libcxxabi;libunwind"
-        )
+        self.assertEqual(env_variables["runtimes_to_build"], "")
         self.assertEqual(
             env_variables["runtimes_check_targets"],
             "",
         )
         self.assertEqual(
             env_variables["runtimes_check_targets_needs_reconfig"],
-            "check-cxx check-cxxabi check-unwind",
+            "",
         )
 
     def test_llvm_mac(self):
@@ -69,16 +67,14 @@ def test_llvm_mac(self):
             env_variables["project_check_targets"],
             "check-clang check-clang-tools check-lld check-llvm check-mlir",
         )
-        self.assertEqual(
-            env_variables["runtimes_to_build"], "libcxx;libcxxabi;libunwind"
-        )
+        self.assertEqual(env_variables["runtimes_to_build"], "")
         self.assertEqual(
             env_variables["runtimes_check_targets"],
             "",
         )
         self.assertEqual(
             env_variables["runtimes_check_targets_needs_reconfig"],
-            "check-cxx check-cxxabi check-unwind",
+            "",
         )
 
     def test_clang(self):
@@ -87,11 +83,11 @@ def test_clang(self):
         )
         self.assertEqual(
             env_variables["projects_to_build"],
-            "clang;clang-tools-extra;lld;llvm",
+            "clang;clang-tools-extra;lld;lldb;llvm",
         )
         self.assertEqual(
             env_variables["project_check_targets"],
-            "check-clang check-clang-tools",
+            "check-clang check-clang-tools check-lldb",
         )
         self.assertEqual(
             env_variables["runtimes_to_build"], "compiler-rt;libcxx;libcxxabi;libunwind"
@@ -119,30 +115,54 @@ def test_clang_windows(self):
         self.assertEqual(
             env_variables["project_check_targets"], "check-clang check-clang-tools"
         )
-        self.assertEqual(
-            env_variables["runtimes_to_build"], "libcxx;libcxxabi;libunwind"
-        )
+        self.assertEqual(env_variables["runtimes_to_build"], "")
         self.assertEqual(
             env_variables["runtimes_check_targets"],
             "",
         )
         self.assertEqual(
             env_variables["runtimes_check_targets_needs_reconfig"],
-            "check-cxx check-cxxabi check-unwind",
+            "",
         )
         self.assertEqual(env_variables["enable_cir"], "OFF")
 
+    def test_compiler_rt(self):
+        env_variables = compute_projects.get_env_variables(
+            ["compiler-rt/lib/asan/asan_allocator.cpp"], "Linux"
+        )
+        self.assertEqual(
+            env_variables["projects_to_build"],
+            "clang;lld",
+        )
+        self.assertEqual(
+            env_variables["project_check_targets"],
+            "",
+        )
+        self.assertEqual(env_variables["runtimes_to_build"], "compiler-rt")
+        self.assertEqual(
+            env_variables["runtimes_check_targets"],
+            "check-compiler-rt",
+        )
+        self.assertEqual(
+            env_variables["runtimes_check_targets_needs_reconfig"],
+            "",
+        )
+        self.assertEqual(
+            env_variables["enable_cir"],
+            "OFF",
+        )
+
     def test_cir(self):
         env_variables = compute_projects.get_env_variables(
             ["clang/lib/CIR/CMakeLists.txt"], "Linux"
         )
         self.assertEqual(
             env_variables["projects_to_build"],
-            "clang;clang-tools-extra;lld;llvm;mlir",
+            "clang;clang-tools-extra;lld;lldb;llvm;mlir",
         )
         self.assertEqual(
             env_variables["project_check_targets"],
-            "check-clang check-clang-cir check-clang-tools",
+            "check-clang check-clang-cir check-clang-tools check-lldb",
         )
         self.assertEqual(
             env_variables["runtimes_to_build"], "compiler-rt;libcxx;libcxxabi;libunwind"
@@ -298,18 +318,15 @@ def test_windows_ci(self):
         )
         self.assertEqual(
             env_variables["runtimes_to_build"],
-            "libcxx;libcxxabi;libunwind",
+            "",
         )
         self.assertEqual(
             env_variables["runtimes_check_targets"],
             "",
         )
-        # TODO(boomanaiden154): We should not be emitting these on Windows.
-        # It does not currently impact anything because we do not build the
-        # runtimes on Windows though.
         self.assertEqual(
             env_variables["runtimes_check_targets_needs_reconfig"],
-            "check-cxx check-cxxabi check-unwind",
+            "",
         )
 
     def test_lldb(self):

.ci/generate_test_report_github.py

@@ -4,20 +4,25 @@
 """Script to generate a build report for Github."""
 
 import argparse
+import platform
 
 import generate_test_report_lib
 
+PLATFORM_TITLES = {
+    "Windows": ":window: Windows x64 Test Results",
+    "Linux": ":penguin: Linux x64 Test Results",
+}
+
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
+    parser.add_argument("return_code", help="The build's return code.", type=int)
     parser.add_argument(
-        "title", help="Title of the test report, without Markdown formatting."
+        "build_test_logs", help="Paths to JUnit report files and ninja logs.", nargs="*"
     )
-    parser.add_argument("return_code", help="The build's return code.", type=int)
-    parser.add_argument("junit_files", help="Paths to JUnit report files.", nargs="*")
     args = parser.parse_args()
 
     report = generate_test_report_lib.generate_report_from_files(
-        args.title, args.return_code, args.junit_files
+        PLATFORM_TITLES[platform.system()], args.return_code, args.build_test_logs
     )
 
     print(report)

.ci/generate_test_report_lib.py

@@ -12,6 +12,84 @@
     "https://github.com/llvm/llvm-project/issues and add the "
     "`infrastructure` label."
 )
+# The maximum number of lines to pull from a ninja failure.
+NINJA_LOG_SIZE_THRESHOLD = 500
+
+
+def _parse_ninja_log(ninja_log: list[str]) -> list[tuple[str, str]]:
+    """Parses an individual ninja log."""
+    failures = []
+    index = 0
+    while index < len(ninja_log):
+        while index < len(ninja_log) and not ninja_log[index].startswith("FAILED:"):
+            index += 1
+        if index == len(ninja_log):
+            # We hit the end of the log without finding a build failure, go to
+            # the next log.
+            return failures
+        # We are trying to parse cases like the following:
+        #
+        # [4/5] test/4.stamp
+        # FAILED: touch test/4.stamp
+        # touch test/4.stamp
+        #
+        # index will point to the line that starts with Failed:. The progress
+        # indicator is the line before this ([4/5] test/4.stamp) and contains a pretty
+        # printed version of the target being built (test/4.stamp). We use this line
+        # and remove the progress information to get a succinct name for the target.
+        failing_action = ninja_log[index - 1].split("] ")[1]
+        failure_log = []
+        while (
+            index < len(ninja_log)
+            and not ninja_log[index].startswith("[")
+            and not ninja_log[index].startswith("ninja: build stopped:")
+            and len(failure_log) < NINJA_LOG_SIZE_THRESHOLD
+        ):
+            failure_log.append(ninja_log[index])
+            index += 1
+        failures.append((failing_action, "\n".join(failure_log)))
+    return failures
+
+
+def find_failure_in_ninja_logs(ninja_logs: list[list[str]]) -> list[tuple[str, str]]:
+    """Extracts failure messages from ninja output.
+
+    This function takes stdout/stderr from ninja in the form of a list of files
+    represented as a list of lines. This function then returns tuples containing
+    the name of the target and the error message.
+
+    Args:
+      ninja_logs: A list of files in the form of a list of lines representing the log
+        files captured from ninja.
+
+    Returns:
+      A list of tuples. The first string is the name of the target that failed. The
+      second string is the error message.
+    """
+    failures = []
+    for ninja_log in ninja_logs:
+        log_failures = _parse_ninja_log(ninja_log)
+        failures.extend(log_failures)
+    return failures
+
+
+def _format_ninja_failures(ninja_failures: list[tuple[str, str]]) -> list[str]:
+    """Formats ninja failures into summary views for the report."""
+    output = []
+    for build_failure in ninja_failures:
+        failed_action, failure_message = build_failure
+        output.extend(
+            [
+                "<details>",
+                f"<summary>{failed_action}</summary>",
+                "",
+                "```",
+                failure_message,
+                "```",
+                "</details>",
+            ]
+        )
+    return output
 
 
 # Set size_limit to limit the byte size of the report. The default is 1MB as this
@@ -24,6 +102,7 @@ def generate_report(
     title,
     return_code,
     junit_objects,
+    ninja_logs: list[list[str]],
     size_limit=1024 * 1024,
     list_failures=True,
 ):
@@ -61,15 +140,34 @@ def generate_report(
                 ]
             )
         else:
-            report.extend(
-                [
-                    "The build failed before running any tests.",
-                    "",
-                    SEE_BUILD_FILE_STR,
-                    "",
-                    UNRELATED_FAILURES_STR,
-                ]
-            )
+            ninja_failures = find_failure_in_ninja_logs(ninja_logs)
+            if not ninja_failures:
+                report.extend(
+                    [
+                        "The build failed before running any tests. Detailed "
+                        "information about the build failure could not be "
+                        "automatically obtained.",
+                        "",
+                        SEE_BUILD_FILE_STR,
+                        "",
+                        UNRELATED_FAILURES_STR,
+                    ]
+                )
+            else:
+                report.extend(
+                    [
+                        "The build failed before running any tests. Click on a "
+                        "failure below to see the details.",
+                        "",
+                    ]
+                )
+                report.extend(_format_ninja_failures(ninja_failures))
+                report.extend(
+                    [
+                        "",
+                        UNRELATED_FAILURES_STR,
+                    ]
+                )
         return "\n".join(report)
 
     tests_passed = tests_run - tests_skipped - tests_failed
@@ -114,14 +212,28 @@ def plural(num_tests):
     elif return_code != 0:
         # No tests failed but the build was in a failed state. Bring this to the user's
         # attention.
-        report.extend(
-            [
-                "",
-                "All tests passed but another part of the build **failed**.",
-                "",
-                SEE_BUILD_FILE_STR,
-            ]
-        )
+        ninja_failures = find_failure_in_ninja_logs(ninja_logs)
+        if not ninja_failures:
+            report.extend(
+                [
+                    "",
+                    "All tests passed but another part of the build **failed**. "
+                    "Information about the build failure could not be automatically "
+                    "obtained.",
+                    "",
+                    SEE_BUILD_FILE_STR,
+                ]
+            )
+        else:
+            report.extend(
+                [
+                    "",
+                    "All tests passed but another part of the build **failed**. Click on "
+                    "a failure below to see the details.",
+                    "",
+                ]
+            )
+            report.extend(_format_ninja_failures(ninja_failures))
 
     if failures or return_code != 0:
         report.extend(["", UNRELATED_FAILURES_STR])
@@ -139,9 +251,19 @@ def plural(num_tests):
     return report
 
 
-def generate_report_from_files(title, return_code, junit_files):
+def generate_report_from_files(title, return_code, build_log_files):
+    junit_files = [
+        junit_file for junit_file in build_log_files if junit_file.endswith(".xml")
+    ]
+    ninja_log_files = [
+        ninja_log for ninja_log in build_log_files if ninja_log.endswith(".log")
+    ]
+    ninja_logs = []
+    for ninja_log_file in ninja_log_files:
+        with open(ninja_log_file, "r") as ninja_log_file_handle:
+            ninja_logs.append(
+                [log_line.strip() for log_line in ninja_log_file_handle.readlines()]
+            )
     return generate_report(
-        title,
-        return_code,
-        [JUnitXml.fromfile(p) for p in junit_files],
+        title, return_code, [JUnitXml.fromfile(p) for p in junit_files], ninja_logs
     )