Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/lldb/packages/Python/lldbsuite/test/macosx/safe-to-func-call/Makefile

@@ -0,0 +1,28 @@
+CC ?= clang
+ifeq "$(ARCH)" ""
+	ARCH = x86_64
+endif
+
+ifeq "$(OS)" ""
+	OS = $(shell uname -s)
+endif
+
+CFLAGS ?= -g -O0
+CWD := $(shell pwd)
+
+LIB_PREFIX := lib
+
+ifeq "$(OS)" "Darwin"
+	CFLAGS += -arch $(ARCH)
+endif
+
+all: a.out
+
+a.out: main.o
+	$(CC) $(CFLAGS) -o a.out main.o
+
+main.o: main.c
+	$(CC) $(CFLAGS) -c main.c
+
+clean:
+	rm -rf $(wildcard *.o *~ *.dylib *.so a.out *.dSYM)

external/llvm-project/lldb/packages/Python/lldbsuite/test/macosx/safe-to-func-call/TestSafeFuncCalls.py

@@ -0,0 +1,73 @@
+"""Test function call thread safety."""
+
+from __future__ import print_function
+
+
+import os
+import time
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestSafeFuncCalls(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line numbers that we will step to in main:
+        self.main_source = "main.c"
+
+    @skipUnlessDarwin
+    @add_test_categories(['pyapi'])
+    def test_with_python_api(self):
+        """Test function call thread safety."""
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+        self.main_source_spec = lldb.SBFileSpec(self.main_source)
+        break1 = target.BreakpointCreateByName("stopper", 'a.out')
+        self.assertTrue(break1, VALID_BREAKPOINT)
+        process = target.LaunchSimple(
+            None, None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+        threads = lldbutil.get_threads_stopped_at_breakpoint(process, break1)
+        if len(threads) != 1:
+            self.fail("Failed to stop at breakpoint 1.")
+
+        self.check_number_of_threads(process)
+
+        main_thread = lldb.SBThread()
+        select_thread = lldb.SBThread()
+        for idx in range(0, process.GetNumThreads()):
+            t = process.GetThreadAtIndex(idx)
+            if t.GetName() == "main thread":
+                main_thread = t
+            if t.GetName() == "select thread":
+                select_thread = t
+
+        self.assertTrue(
+            main_thread.IsValid() and select_thread.IsValid(),
+            "Got both expected threads")
+
+        self.safe_to_call_func_on_main_thread(main_thread)
+        self.safe_to_call_func_on_select_thread(select_thread)
+
+    def check_number_of_threads(self, process):
+        self.assertTrue(
+            process.GetNumThreads() == 2,
+            "Check that the process has two threads when sitting at the stopper() breakpoint")
+
+    def safe_to_call_func_on_main_thread(self, main_thread):
+        self.assertTrue(main_thread.SafeToCallFunctions(),
+                        "It is safe to call functions on the main thread")
+
+    def safe_to_call_func_on_select_thread(self, select_thread):
+        self.assertTrue(
+            select_thread.SafeToCallFunctions() == False,
+            "It is not safe to call functions on the select thread")

external/llvm-project/lldb/packages/Python/lldbsuite/test/macosx/safe-to-func-call/main.c

@@ -0,0 +1,30 @@
+#include <sys/select.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <unistd.h>
+
+void *
+select_thread (void *in)
+{
+    pthread_setname_np ("select thread");
+    fd_set fdset;
+    FD_SET (STDIN_FILENO, &fdset);
+    while (1)
+        select (2, &fdset, NULL, NULL, NULL);
+    return NULL;
+}
+
+void stopper ()
+{
+    while (1)
+        sleep(1); // break here
+}
+
+int main ()
+{
+    pthread_setname_np ("main thread");
+    pthread_t other_thread;
+    pthread_create (&other_thread, NULL, select_thread, NULL);
+    sleep (1);
+    stopper();
+}