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[PATCH v2] gdbstub: Switch to the thread receiving a signal
From: |
Pavel Labath |
Subject: |
[PATCH v2] gdbstub: Switch to the thread receiving a signal |
Date: |
Tue, 19 Oct 2021 19:49:52 +0200 |
Respond with Txxthread:yyyy; instead of a plain Sxx to indicate which
thread received the signal. Otherwise, the debugger will associate it
with the main one. Also automatically select this thread, as that is
what gdb expects.
Signed-off-by: Pavel Labath <pavel@labath.sk>
---
gdbstub.c | 8 ++-
tests/tcg/multiarch/Makefile.target | 10 +++-
.../gdbstub/test-thread-breakpoint.py | 60 +++++++++++++++++++
3 files changed, 75 insertions(+), 3 deletions(-)
create mode 100644 tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
diff --git a/gdbstub.c b/gdbstub.c
index 36b85aa..23baaef 100644
--- a/gdbstub.c
+++ b/gdbstub.c
@@ -3138,8 +3138,12 @@ gdb_handlesig(CPUState *cpu, int sig)
tb_flush(cpu);
if (sig != 0) {
- snprintf(buf, sizeof(buf), "S%02x", target_signal_to_gdb(sig));
- put_packet(buf);
+ gdb_set_stop_cpu(cpu);
+ g_string_printf(gdbserver_state.str_buf,
+ "T%02xthread:", target_signal_to_gdb(sig));
+ gdb_append_thread_id(cpu, gdbserver_state.str_buf);
+ g_string_append_c(gdbserver_state.str_buf, ';');
+ put_strbuf();
}
/* put_packet() might have detected that the peer terminated the
connection. */
diff --git a/tests/tcg/multiarch/Makefile.target
b/tests/tcg/multiarch/Makefile.target
index 6ccb592..c84683f 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -70,11 +70,19 @@ run-gdbstub-qxfer-auxv-read: sha1
--bin $< --test
$(MULTIARCH_SRC)/gdbstub/test-qxfer-auxv-read.py, \
"basic gdbstub qXfer:auxv:read support")
+run-gdbstub-thread-breakpoint: testthread
+ $(call run-test, $@, $(GDB_SCRIPT) \
+ --gdb $(HAVE_GDB_BIN) \
+ --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \
+ --bin $< --test
$(MULTIARCH_SRC)/gdbstub/test-thread-breakpoint.py, \
+ "hitting a breakpoint on non-main thread")
+
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb")
endif
-EXTRA_RUNS += run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read
+EXTRA_RUNS += run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read \
+ run-gdbstub-thread-breakpoint
# ARM Compatible Semi Hosting Tests
#
diff --git a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
new file mode 100644
index 0000000..798d508
--- /dev/null
+++ b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
@@ -0,0 +1,60 @@
+from __future__ import print_function
+#
+# Test auxiliary vector is loaded via gdbstub
+#
+# This is launched via tests/guest-debug/run-test.py
+#
+
+import gdb
+import sys
+
+failcount = 0
+
+def report(cond, msg):
+ "Report success/fail of test"
+ if cond:
+ print ("PASS: %s" % (msg))
+ else:
+ print ("FAIL: %s" % (msg))
+ global failcount
+ failcount += 1
+
+def run_test():
+ "Run through the tests one by one"
+
+ sym, ok = gdb.lookup_symbol("thread1_func")
+ gdb.execute("b thread1_func")
+ gdb.execute("c")
+
+ frame = gdb.selected_frame()
+ report(str(frame.function()) == "thread1_func", "break @ %s"%frame)
+
+#
+# This runs as the script it sourced (via -x, via run-test.py)
+#
+try:
+ inferior = gdb.selected_inferior()
+ arch = inferior.architecture()
+ print("ATTACHED: %s" % arch.name())
+except (gdb.error, AttributeError):
+ print("SKIPPING (not connected)", file=sys.stderr)
+ exit(0)
+
+if gdb.parse_and_eval('$pc') == 0:
+ print("SKIP: PC not set")
+ exit(0)
+
+try:
+ # These are not very useful in scripts
+ gdb.execute("set pagination off")
+ gdb.execute("set confirm off")
+
+ # Run the actual tests
+ run_test()
+except (gdb.error):
+ print ("GDB Exception: %s" % (sys.exc_info()[0]))
+ failcount += 1
+ pass
+
+print("All tests complete: %d failures" % failcount)
+exit(failcount)
--
2.32.0
- [PATCH v2] gdbstub: Switch to the thread receiving a signal,
Pavel Labath <=