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[lldb][test] Wait for a file before attempting to attach to lldb-server test inferior #162064

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Merged
merged 3 commits into from
Oct 7, 2025
Merged

[lldb][test] Wait for a file before attempting to attach to lldb-server test inferior #162064

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[lldb][test] Wait for a file before attempting to attach to lldb-serv…
DavidSpickett Oct 6, 2025
e02c77e
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DavidSpickett Oct 6, 2025
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DavidSpickett Oct 6, 2025
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11 changes: 9 additions & 2 deletions lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py
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Original file line number Diff line number Diff line change
Expand Up @@ -444,13 +444,20 @@ def launch_process_for_attach(
if not exe_path:
exe_path = self.getBuildArtifact("a.out")

args = []
# This file will be created once the inferior has enabled attaching.
sync_file_path = lldbutil.append_to_process_working_directory(
self, "process_ready"
)
args = [f"syncfile:{sync_file_path}"]
if inferior_args:
args.extend(inferior_args)
if sleep_seconds:
args.append("sleep:%d" % sleep_seconds)

return self.spawnSubprocess(exe_path, args)
inferior = self.spawnSubprocess(exe_path, args)
lldbutil.wait_for_file_on_target(self, sync_file_path)

return inferior

def prep_debug_monitor_and_inferior(
self,
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7 changes: 6 additions & 1 deletion lldb/test/API/tools/lldb-server/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#include <cstdlib>
#include <cstring>
#include <errno.h>
#include <fstream>
#include <future>
#include <inttypes.h>
#include <memory>
Expand Down Expand Up @@ -265,7 +266,11 @@ int main(int argc, char **argv) {
// Process command line args.
for (int i = 1; i < argc; ++i) {
std::string arg = argv[i];
if (consume_front(arg, "stderr:")) {
if (consume_front(arg, "syncfile:")) {
// Write to this file to tell test framework that attaching is now
// possible.
std::ofstream(arg).close();
} else if (consume_front(arg, "stderr:")) {
// Treat remainder as text to go to stderr.
fprintf(stderr, "%s\n", arg.c_str());
} else if (consume_front(arg, "retval:")) {
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