Provide a mechanism to do some pre-loading of symbols up front.

Loading a shared library can require a large amount of work; rather than do that serially for each library,
this patch will allow parallelization of the symbols and debug info name indexes.

From scott.smith@purestorage.com

https://reviews.llvm.org/D32598

llvm-svn: 301609

1 files changed, 17 insertions, 4 deletions

diff --git a/lldb/packages/Python/lldbsuite/test/lang/c/shared_lib/TestSharedLib.py b/lldb/packages/Python/lldbsuite/test/lang/c/shared_lib/TestSharedLib.py
index 61a67dc1398..edc83bf5898 100644
--- a/lldb/packages/Python/lldbsuite/test/lang/c/shared_lib/TestSharedLib.py
+++ b/lldb/packages/Python/lldbsuite/test/lang/c/shared_lib/TestSharedLib.py
@@ -13,14 +13,13 @@ class SharedLibTestCase(TestBase):
 
     mydir = TestBase.compute_mydir(__file__)
 
-    def test_expr(self):
-        """Test that types work when defined in a shared library and forward-declared in the main executable"""
+    def common_test_expr(self, preload_symbols):
         if "clang" in self.getCompiler() and "3.4" in self.getCompilerVersion():
             self.skipTest(
                 "llvm.org/pr16214 -- clang emits partial DWARF for structures referenced via typedef")
 
         self.build()
-        self.common_setup()
+        self.common_setup(preload_symbols)
 
         # This should display correctly.
         self.expect(
@@ -31,6 +30,18 @@ class SharedLibTestCase(TestBase):
                 "(sub_foo)",
                 "other_element = 3"])
 
+        self.expect(
+            "expression GetMeASubFoo(my_foo_ptr)",
+            startstr="(sub_foo *) $")
+
+    def test_expr(self):
+        """Test that types work when defined in a shared library and forward-declared in the main executable"""
+        self.common_test_expr(True)
+
+    def test_expr_no_preload(self):
+        """Test that types work when defined in a shared library and forward-declared in the main executable, but with preloading disabled"""
+        self.common_test_expr(False)
+
     @unittest2.expectedFailure("rdar://problem/10704639")
     def test_frame_variable(self):
         """Test that types work when defined in a shared library and forward-declared in the main executable"""
@@ -54,7 +65,7 @@ class SharedLibTestCase(TestBase):
         self.line = line_number(self.source, '// Set breakpoint 0 here.')
         self.shlib_names = ["foo"]
 
-    def common_setup(self):
+    def common_setup(self, preload_symbols = True):
         # Run in synchronous mode
         self.dbg.SetAsync(False)
 
@@ -62,6 +73,8 @@ class SharedLibTestCase(TestBase):
         target = self.dbg.CreateTarget("a.out")
         self.assertTrue(target, VALID_TARGET)
 
+        self.runCmd("settings set target.preload-symbols " + str(preload_symbols).lower())
+
         # Break inside the foo function which takes a bar_ptr argument.
         lldbutil.run_break_set_by_file_and_line(
             self, self.source, self.line, num_expected_locations=1, loc_exact=True)