This revision was automatically updated to reflect the committed changes.
Closed by commit rGaf9e1fa17843: [lldb] Detach the child process when stepping
over a fork (authored by labath).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D141605/new/
https://reviews.llvm.org/D141605
Files:
lldb/source/Target/ThreadPlan.cpp
lldb/test/API/functionalities/fork/resumes-child/Makefile
lldb/test/API/functionalities/fork/resumes-child/TestForkResumesChild.py
lldb/test/API/functionalities/fork/resumes-child/main.cpp
Index: lldb/test/API/functionalities/fork/resumes-child/main.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/main.cpp
@@ -0,0 +1,29 @@
+#include <cassert>
+#include <chrono>
+#include <cstdlib>
+#include <sys/wait.h>
+#include <thread>
+#include <unistd.h>
+
+int main() {
+ pid_t fork_result = fork(); // break here
+ assert(fork_result >= 0);
+ if (fork_result == 0) {
+ // child
+ _exit(47);
+ }
+ // parent
+ // Use polling to avoid blocking if the child is not actually resumed.
+ auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(10);
+ std::chrono::milliseconds poll_interval{10};
+ while (std::chrono::steady_clock::now() < deadline) {
+ int status;
+ pid_t waitpid_result = waitpid(fork_result, &status, WNOHANG);
+ if (waitpid_result == fork_result)
+ return 0;
+ assert(waitpid_result == 0);
+ std::this_thread::sleep_for(poll_interval);
+ poll_interval *= 2;
+ }
+ abort();
+}
Index: lldb/test/API/functionalities/fork/resumes-child/TestForkResumesChild.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/TestForkResumesChild.py
@@ -0,0 +1,22 @@
+"""
+Make sure that the fork child keeps running.
+"""
+
+
+
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+
+
+class TestForkResumesChild(TestBase):
+
+ NO_DEBUG_INFO_TESTCASE = True
+
+ @skipIfWindows
+ def test_step_over_fork(self):
+ self.build()
+ lldbutil.run_to_source_breakpoint(self, "// break here",
lldb.SBFileSpec("main.cpp"))
+ self.runCmd("next")
+ self.expect("continue", substrs = ["exited with status = 0"])
Index: lldb/test/API/functionalities/fork/resumes-child/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/Makefile
@@ -0,0 +1,3 @@
+CXX_SOURCES := main.cpp
+
+include Makefile.rules
Index: lldb/source/Target/ThreadPlan.cpp
===================================================================
--- lldb/source/Target/ThreadPlan.cpp
+++ lldb/source/Target/ThreadPlan.cpp
@@ -171,6 +171,9 @@
case eStopReasonExec:
case eStopReasonThreadExiting:
case eStopReasonInstrumentation:
+ case eStopReasonFork:
+ case eStopReasonVFork:
+ case eStopReasonVForkDone:
return true;
default:
return false;
Index: lldb/test/API/functionalities/fork/resumes-child/main.cpp
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/main.cpp
@@ -0,0 +1,29 @@
+#include <cassert>
+#include <chrono>
+#include <cstdlib>
+#include <sys/wait.h>
+#include <thread>
+#include <unistd.h>
+
+int main() {
+ pid_t fork_result = fork(); // break here
+ assert(fork_result >= 0);
+ if (fork_result == 0) {
+ // child
+ _exit(47);
+ }
+ // parent
+ // Use polling to avoid blocking if the child is not actually resumed.
+ auto deadline = std::chrono::steady_clock::now() + std::chrono::seconds(10);
+ std::chrono::milliseconds poll_interval{10};
+ while (std::chrono::steady_clock::now() < deadline) {
+ int status;
+ pid_t waitpid_result = waitpid(fork_result, &status, WNOHANG);
+ if (waitpid_result == fork_result)
+ return 0;
+ assert(waitpid_result == 0);
+ std::this_thread::sleep_for(poll_interval);
+ poll_interval *= 2;
+ }
+ abort();
+}
Index: lldb/test/API/functionalities/fork/resumes-child/TestForkResumesChild.py
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/TestForkResumesChild.py
@@ -0,0 +1,22 @@
+"""
+Make sure that the fork child keeps running.
+"""
+
+
+
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+
+
+class TestForkResumesChild(TestBase):
+
+ NO_DEBUG_INFO_TESTCASE = True
+
+ @skipIfWindows
+ def test_step_over_fork(self):
+ self.build()
+ lldbutil.run_to_source_breakpoint(self, "// break here", lldb.SBFileSpec("main.cpp"))
+ self.runCmd("next")
+ self.expect("continue", substrs = ["exited with status = 0"])
Index: lldb/test/API/functionalities/fork/resumes-child/Makefile
===================================================================
--- /dev/null
+++ lldb/test/API/functionalities/fork/resumes-child/Makefile
@@ -0,0 +1,3 @@
+CXX_SOURCES := main.cpp
+
+include Makefile.rules
Index: lldb/source/Target/ThreadPlan.cpp
===================================================================
--- lldb/source/Target/ThreadPlan.cpp
+++ lldb/source/Target/ThreadPlan.cpp
@@ -171,6 +171,9 @@
case eStopReasonExec:
case eStopReasonThreadExiting:
case eStopReasonInstrumentation:
+ case eStopReasonFork:
+ case eStopReasonVFork:
+ case eStopReasonVForkDone:
return true;
default:
return false;
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