diff mbox series

[PULL,19/21] gdbstub: Switch to the thread receiving a signal

Message ID 20211103170558.717981-20-alex.bennee@linaro.org
State Accepted
Commit 4a82be77de9dcfe37c3a8257953737f2b3c9b9d7
Headers show
Series testing, plugin and gdbstub updates | expand

Commit Message

Alex Bennée Nov. 3, 2021, 5:05 p.m. UTC 
From: Pavel Labath <pavel@labath.sk>


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>

Message-Id: <20211019174953.36560-1-pavel@labath.sk>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

Message-Id: <20211026102234.3961636-29-alex.bennee@linaro.org>

-- 
2.30.2
diff mbox series

Patch

diff --git a/gdbstub.c b/gdbstub.c
index 36b85aa50e..23baaef40e 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 c0d9e638e9..b962ed8236 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -68,11 +68,19 @@  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 0000000000..798d508bc7
--- /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)