emrekultursay updated this revision to Diff 373559.
emrekultursay added a comment.
Add new dlopen test
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D109797/new/
https://reviews.llvm.org/D109797
Files:
lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
lldb/test/API/functionalities/dlopen/Makefile
lldb/test/API/functionalities/dlopen/TestDlopen.py
lldb/test/API/functionalities/dlopen/b.cpp
lldb/test/API/functionalities/dlopen/main.cpp
Index: lldb/test/API/functionalities/dlopen/main.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen/main.cpp
@@ -0,0 +1,30 @@
+#include <dlfcn.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+ const char* solib = "./liblib_b.so";
+ if (argc == 2) {
+ solib = argv[1];
+ }
+ printf("Using solib at: %s\n", solib);
+
+ int main_thread_continue = 0;
+ // Wait until debugger is attached.
+ int i = 0;
+ for (i = 0; i < 100; i++) {
+ usleep(1000*1000); // break here
+ if (main_thread_continue) {
+ break;
+ }
+ }
+ assert(i != 100 && "timed out waiting for debugger");
+
+ // dlopen the 'lib_b.so' shared library.
+ void* h = dlopen(solib, RTLD_LAZY);
+ if (h == nullptr) {
+ assert(h && "dlopen failed?"); // break on error
+ }
+ return i; // break after dlopen
+}
Index: lldb/test/API/functionalities/dlopen/b.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen/b.cpp
@@ -0,0 +1,4 @@
+
+
+int LLDB_DYLIB_EXPORT b_function() { return 500; }
+
Index: lldb/test/API/functionalities/dlopen/TestDlopen.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen/TestDlopen.py
@@ -0,0 +1,60 @@
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+class TestCase(TestBase):
+
+ mydir = TestBase.compute_mydir(__file__)
+
+ @skipIfRemote
+ @skipIfWindows
+ def test_dlopen_after_attach(self):
+ self.build()
+ exe = self.getBuildArtifact("a.out")
+ so = self.getBuildArtifact("liblib_b.so")
+
+ # Spawn a new process.
+ # use realpath to workaround llvm.org/pr48376
+ # Pass path to solib for dlopen to properly locate the library.
+ popen = self.spawnSubprocess(os.path.realpath(exe), args = [os.path.realpath(so)])
+ pid = popen.pid
+
+ # Attach to the spawned process.
+ self.runCmd("process attach -p " + str(pid))
+
+ target = self.dbg.GetSelectedTarget()
+ process = target.GetProcess()
+ self.assertTrue(process, PROCESS_IS_VALID)
+
+ # Continue until first breakpoint.
+ breakpoint1 = self.target().BreakpointCreateBySourceRegex(
+ "// break here", lldb.SBFileSpec("main.cpp"))
+ self.assertEqual(breakpoint1.GetNumResolvedLocations(), 1)
+ stopped_threads = lldbutil.continue_to_breakpoint(self.process(), breakpoint1)
+ self.assertEqual(len(stopped_threads), 1)
+
+ # Check that image list does not contain lib_b.so before dlopen.
+ self.match(
+ "image list",
+ patterns = ["liblib_b.so"],
+ matching = False,
+ msg = "liblib_b.so should not have been in image list")
+
+ # Change a variable to escape the loop
+ self.runCmd("expression main_thread_continue = 1")
+
+ # Continue so that dlopen is called.
+ breakpoint2 = self.target().BreakpointCreateBySourceRegex(
+ "// break after dlopen", lldb.SBFileSpec("main.cpp"))
+ self.assertEqual(breakpoint2.GetNumResolvedLocations(), 1)
+ process.Continue()
+ self.assertEqual(len(stopped_threads), 1)
+
+ # Check that image list contains lib_b.so after dlopen.
+ self.match(
+ "image list",
+ patterns = ["liblib_b.so"],
+ matching = True,
+ msg = "Missing liblib_b.so in image list")
+
Index: lldb/test/API/functionalities/dlopen/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/dlopen/Makefile
@@ -0,0 +1,9 @@
+CXX_SOURCES := main.cpp
+USE_LIBDL := 1
+
+lib_b:
+ $(MAKE) -f $(MAKEFILE_RULES) \
+ DYLIB_ONLY=YES DYLIB_CXX_SOURCES=b.cpp DYLIB_NAME=lib_b
+all: lib_b
+
+include Makefile.rules
Index: lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
===================================================================
--- lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
+++ lldb/source/Plugins/DynamicLoader/POSIX-DYLD/DynamicLoaderPOSIXDYLD.cpp
@@ -442,14 +442,18 @@
if (module_sp->GetObjectFile()->GetBaseAddress().GetLoadAddress(
&m_process->GetTarget()) == m_interpreter_base &&
module_sp != m_interpreter_module.lock()) {
- // If this is a duplicate instance of ld.so, unload it. We may end up
- // with it if we load it via a different path than before (symlink
- // vs real path).
- // TODO: remove this once we either fix library matching or avoid
- // loading the interpreter when setting the rendezvous breakpoint.
- UnloadSections(module_sp);
- loaded_modules.Remove(module_sp);
- continue;
+ if (m_interpreter_module.lock() == nullptr) {
+ m_interpreter_module = module_sp;
+ } else {
+ // If this is a duplicate instance of ld.so, unload it. We may end
+ // up with it if we load it via a different path than before
+ // (symlink vs real path).
+ // TODO: remove this once we either fix library matching or avoid
+ // loading the interpreter when setting the rendezvous breakpoint.
+ UnloadSections(module_sp);
+ loaded_modules.Remove(module_sp);
+ continue;
+ }
}
loaded_modules.AppendIfNeeded(module_sp);
@@ -620,6 +624,7 @@
}
m_process->GetTarget().ModulesDidLoad(module_list);
+ m_initial_modules_added = true;
}
addr_t DynamicLoaderPOSIXDYLD::ComputeLoadOffset() {
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