Merge tag 'pull-maintainer-ominbus-300823-1' of https://gitlab.com/stsquad/qemu into staging

testing and gdbstub updates:

  - enable ccache for gitlab builds
  - fix various test info leakages for non V=1
  - update style to allow loop vars
  - bump FreeBSD to v13.2
  - clean-up gdbstub tests
  - various gdbstub doc and refactorings

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# gpg: Signature made Wed 30 Aug 2023 10:00:00 EDT
# gpg:                using RSA key 6685AE99E75167BCAFC8DF35FBD0DB095A9E2A44
# gpg: Good signature from "Alex Bennée (Master Work Key) <alex.bennee@linaro.org>" [unknown]
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* tag 'pull-maintainer-ominbus-300823-1' of https://gitlab.com/stsquad/qemu:
  gdbstub: move comment for gdb_register_coprocessor
  gdbstub: replace global gdb_has_xml with a function
  gdbstub: refactor get_feature_xml
  gdbstub: remove unused user_ctx field
  gdbstub: fixes cases where wrong threads were reported to GDB on SIGINT
  tests/tcg: clean-up gdb confirm/pagination settings
  tests: remove test-gdbstub.py
  .gitlab-ci.d/cirrus.yml: Update FreeBSD to v13.2
  docs/style: permit inline loop variables
  tests/tcg: remove quoting for info output
  tests/docker: cleanup non-verbose output
  gitlab: enable ccache for many build jobs

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

17 files changed, 151 insertions, 219 deletions

diff --git a/tests/docker/Makefile.include b/tests/docker/Makefile.include
index 142e860..dfabafa 100644
--- a/tests/docker/Makefile.include
+++ b/tests/docker/Makefile.include
@@ -46,9 +46,9 @@ docker-image-%: $(DOCKER_FILES_DIR)/%.docker
 		--build-arg BUILDKIT_INLINE_CACHE=1 	\
 		$(if $(NOUSER),,			\
 			--build-arg USER=$(USER)	\
-			--build-arg UID=$(UID))	\
-		-t qemu/$* - < $<, 			\
-		"BUILD", $1)
+			--build-arg UID=$(UID))		\
+		-t qemu/$* - < $< $(if $V,,> /dev/null),\
+		"BUILD", $*)
 
 # Special rule for debootstraped binfmt linux-user images
 docker-binfmt-image-debian-%: $(DOCKER_FILES_DIR)/debian-bootstrap.docker
diff --git a/tests/docker/dockerfiles/debian-hexagon-cross.docker b/tests/docker/dockerfiles/debian-hexagon-cross.docker
index 153fc7c..7c38d7c 100644
--- a/tests/docker/dockerfiles/debian-hexagon-cross.docker
+++ b/tests/docker/dockerfiles/debian-hexagon-cross.docker
@@ -15,6 +15,7 @@ RUN apt-get update && \
 # Install common build utilities
     apt-get install -y --no-install-recommends \
         curl \
+        ccache \
         xz-utils \
         ca-certificates \
         bison \
@@ -27,7 +28,12 @@ RUN apt-get update && \
         python3-wheel && \
 # Install QEMU build deps for use in CI
     DEBIAN_FRONTEND=noninteractive eatmydata \
-    apt build-dep -yy --arch-only qemu
+    apt build-dep -yy --arch-only qemu && \
+    mkdir -p /usr/libexec/ccache-wrappers && \
+    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/c++ && \
+    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/cc && \
+    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/g++ && \
+    ln -s /usr/bin/ccache /usr/libexec/ccache-wrappers/gcc
 
 RUN /usr/bin/pip3 install tomli
 
@@ -35,6 +41,7 @@ ENV TOOLCHAIN_INSTALL /opt
 ENV TOOLCHAIN_RELEASE 16.0.0
 ENV TOOLCHAIN_BASENAME "clang+llvm-${TOOLCHAIN_RELEASE}-cross-hexagon-unknown-linux-musl"
 ENV TOOLCHAIN_URL https://codelinaro.jfrog.io/artifactory/codelinaro-toolchain-for-hexagon/v${TOOLCHAIN_RELEASE}/${TOOLCHAIN_BASENAME}.tar.xz
+ENV CCACHE_WRAPPERSDIR "/usr/libexec/ccache-wrappers"
 
 RUN curl -#SL "$TOOLCHAIN_URL" | tar -xJC "$TOOLCHAIN_INSTALL"
 ENV PATH $PATH:${TOOLCHAIN_INSTALL}/${TOOLCHAIN_BASENAME}/x86_64-linux-gnu/bin
diff --git a/tests/guest-debug/run-test.py b/tests/guest-debug/run-test.py
index a032e01..b13b27d 100755
--- a/tests/guest-debug/run-test.py
+++ b/tests/guest-debug/run-test.py
@@ -83,6 +83,8 @@ if __name__ == '__main__':
         gdb_cmd += " %s" % (args.gdb_args)
     # run quietly and ignore .gdbinit
     gdb_cmd += " -q -n -batch"
+    # disable pagination
+    gdb_cmd += " -ex 'set pagination off'"
     # disable prompts in case of crash
     gdb_cmd += " -ex 'set confirm off'"
     # connect to remote
diff --git a/tests/guest-debug/test-gdbstub.py b/tests/guest-debug/test-gdbstub.py
deleted file mode 100644
index 98a5df4..0000000
--- a/tests/guest-debug/test-gdbstub.py
+++ /dev/null
@@ -1,177 +0,0 @@
-#
-# This script needs to be run on startup
-# qemu -kernel ${KERNEL} -s -S
-# and then:
-# gdb ${KERNEL}.vmlinux -x ${QEMU_SRC}/tests/guest-debug/test-gdbstub.py
-
-import gdb
-
-failcount = 0
-
-
-def report(cond, msg):
-    "Report success/fail of test"
-    if cond:
-        print ("PASS: %s" % (msg))
-    else:
-        print ("FAIL: %s" % (msg))
-        global failcount
-        failcount += 1
-
-
-def check_step():
-    "Step an instruction, check it moved."
-    start_pc = gdb.parse_and_eval('$pc')
-    gdb.execute("si")
-    end_pc = gdb.parse_and_eval('$pc')
-
-    return not (start_pc == end_pc)
-
-
-def check_break(sym_name):
-    "Setup breakpoint, continue and check we stopped."
-    sym, ok = gdb.lookup_symbol(sym_name)
-    bp = gdb.Breakpoint(sym_name)
-
-    gdb.execute("c")
-
-    # hopefully we came back
-    end_pc = gdb.parse_and_eval('$pc')
-    print ("%s == %s %d" % (end_pc, sym.value(), bp.hit_count))
-    bp.delete()
-
-    # can we test we hit bp?
-    return end_pc == sym.value()
-
-
-# We need to do hbreak manually as the python interface doesn't export it
-def check_hbreak(sym_name):
-    "Setup hardware breakpoint, continue and check we stopped."
-    sym, ok = gdb.lookup_symbol(sym_name)
-    gdb.execute("hbreak %s" % (sym_name))
-    gdb.execute("c")
-
-    # hopefully we came back
-    end_pc = gdb.parse_and_eval('$pc')
-    print ("%s == %s" % (end_pc, sym.value()))
-
-    if end_pc == sym.value():
-        gdb.execute("d 1")
-        return True
-    else:
-        return False
-
-
-class WatchPoint(gdb.Breakpoint):
-
-    def get_wpstr(self, sym_name):
-        "Setup sym and wp_str for given symbol."
-        self.sym, ok = gdb.lookup_symbol(sym_name)
-        wp_addr = gdb.parse_and_eval(sym_name).address
-        self.wp_str = '*(%(type)s)(&%(address)s)' % dict(
-            type = wp_addr.type, address = sym_name)
-
-        return(self.wp_str)
-
-    def __init__(self, sym_name, type):
-        wp_str = self.get_wpstr(sym_name)
-        super(WatchPoint, self).__init__(wp_str, gdb.BP_WATCHPOINT, type)
-
-    def stop(self):
-        end_pc = gdb.parse_and_eval('$pc')
-        print ("HIT WP @ %s" % (end_pc))
-        return True
-
-
-def do_one_watch(sym, wtype, text):
-
-    wp = WatchPoint(sym, wtype)
-    gdb.execute("c")
-    report_str = "%s for %s (%s)" % (text, sym, wp.sym.value())
-
-    if wp.hit_count > 0:
-        report(True, report_str)
-        wp.delete()
-    else:
-        report(False, report_str)
-
-
-def check_watches(sym_name):
-    "Watch a symbol for any access."
-
-    # Should hit for any read
-    do_one_watch(sym_name, gdb.WP_ACCESS, "awatch")
-
-    # Again should hit for reads
-    do_one_watch(sym_name, gdb.WP_READ, "rwatch")
-
-    # Finally when it is written
-    do_one_watch(sym_name, gdb.WP_WRITE, "watch")
-
-
-class CatchBreakpoint(gdb.Breakpoint):
-    def __init__(self, sym_name):
-        super(CatchBreakpoint, self).__init__(sym_name)
-        self.sym, ok = gdb.lookup_symbol(sym_name)
-
-    def stop(self):
-        end_pc = gdb.parse_and_eval('$pc')
-        print ("CB: %s == %s" % (end_pc, self.sym.value()))
-        if end_pc == self.sym.value():
-            report(False, "Hit final catchpoint")
-
-
-def run_test():
-    "Run through the tests one by one"
-
-    print ("Checking we can step the first few instructions")
-    step_ok = 0
-    for i in range(3):
-        if check_step():
-            step_ok += 1
-
-    report(step_ok == 3, "single step in boot code")
-
-    print ("Checking HW breakpoint works")
-    break_ok = check_hbreak("kernel_init")
-    report(break_ok, "hbreak @ kernel_init")
-
-    # Can't set this up until we are in the kernel proper
-    # if we make it to run_init_process we've over-run and
-    # one of the tests failed
-    print ("Setup catch-all for run_init_process")
-    cbp = CatchBreakpoint("run_init_process")
-    cpb2 = CatchBreakpoint("try_to_run_init_process")
-
-    print ("Checking Normal breakpoint works")
-    break_ok = check_break("wait_for_completion")
-    report(break_ok, "break @ wait_for_completion")
-
-    print ("Checking watchpoint works")
-    check_watches("system_state")
-
-#
-# This runs as the script it sourced (via -x)
-#
-
-try:
-    print ("Connecting to remote")
-    gdb.execute("target remote localhost:1234")
-
-    # These are not very useful in scripts
-    gdb.execute("set pagination off")
-    gdb.execute("set confirm off")
-
-    # Run the actual tests
-    run_test()
-
-except:
-    print ("GDB Exception: %s" % (sys.exc_info()[0]))
-    failcount += 1
-    import code
-    code.InteractiveConsole(locals=globals()).interact()
-    raise
-
-# Finally kill the inferior and exit gdb with a count of failures
-gdb.execute("kill")
-exit(failcount)
diff --git a/tests/tcg/aarch64/Makefile.target b/tests/tcg/aarch64/Makefile.target
index 681dfa0..b77bbd9 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -14,7 +14,7 @@ AARCH64_TESTS=fcvt pcalign-a64 lse2-fault
 fcvt: LDFLAGS+=-lm
 
 run-fcvt: fcvt
-	$(call run-test,$<,$(QEMU) $<, "$< on $(TARGET_NAME)")
+	$(call run-test,$<,$(QEMU) $<)
 	$(call diff-out,$<,$(AARCH64_SRC)/fcvt.ref)
 
 config-cc.mak: Makefile
diff --git a/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py b/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py
index b9ef169..ee8d467 100644
--- a/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py
+++ b/tests/tcg/aarch64/gdbstub/test-sve-ioctl.py
@@ -76,9 +76,6 @@ except (gdb.error, AttributeError):
     exit(0)
 
 try:
-    # These are not very useful in scripts
-    gdb.execute("set pagination off")
-
     # Run the actual tests
     run_test()
 except:
diff --git a/tests/tcg/aarch64/gdbstub/test-sve.py b/tests/tcg/aarch64/gdbstub/test-sve.py
index ef57c74..afd8ece 100644
--- a/tests/tcg/aarch64/gdbstub/test-sve.py
+++ b/tests/tcg/aarch64/gdbstub/test-sve.py
@@ -66,9 +66,6 @@ except (gdb.error, AttributeError):
     exit(0)
 
 try:
-    # These are not very useful in scripts
-    gdb.execute("set pagination off")
-
     # Run the actual tests
     run_test()
 except:
diff --git a/tests/tcg/multiarch/gdbstub/interrupt.py b/tests/tcg/multiarch/gdbstub/interrupt.py
new file mode 100644
index 0000000..e222ac9
--- /dev/null
+++ b/tests/tcg/multiarch/gdbstub/interrupt.py
@@ -0,0 +1,97 @@
+from __future__ import print_function
+#
+# Test some of the softmmu debug features with the multiarch memory
+# test. It is a port of the original vmlinux focused test case but
+# using the "memory" test instead.
+#
+# 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 check_interrupt(thread):
+    """
+    Check that, if thread is resumed, we go back to the same thread when the
+    program gets interrupted.
+    """
+
+    # Switch to the thread we're going to be running the test in.
+    print("thread ", thread.num)
+    gdb.execute("thr %d" % thread.num)
+
+    # Enter the loop() function on this thread.
+    #
+    # While there are cleaner ways to do this, we want to minimize the number of
+    # side effects on the gdbstub's internal state, since those may mask bugs.
+    # Ideally, there should be no difference between what we're doing here and
+    # the program reaching the loop() function on its own.
+    #
+    # For this to be safe, we only need the prologue of loop() to not have
+    # instructions that may have problems with what we're doing here. We don't
+    # have to worry about anything else, as this function never returns.
+    gdb.execute("set $pc = loop")
+
+    # Continue and then interrupt the task.
+    gdb.post_event(lambda: gdb.execute("interrupt"))
+    gdb.execute("c")
+
+    # Check whether the thread we're in after the interruption is the same we
+    # ran continue from.
+    return (thread.num == gdb.selected_thread().num)
+
+
+def run_test():
+    """
+    Test if interrupting the code always lands us on the same thread when
+    running with scheduler-lock enabled.
+    """
+
+    gdb.execute("set scheduler-locking on")
+    for thread in gdb.selected_inferior().threads():
+        report(check_interrupt(thread),
+               "thread %d resumes correctly on interrupt" % thread.num)
+
+
+#
+# This runs as the script it sourced (via -x, via run-test.py)
+#
+try:
+    inferior = gdb.selected_inferior()
+    arch = inferior.architecture()
+    print("ATTACHED: %s" % arch.name())
+except (gdb.error, AttributeError):
+    print("SKIPPING (not connected)", file=sys.stderr)
+    exit(0)
+
+if gdb.parse_and_eval('$pc') == 0:
+    print("SKIP: PC not set")
+    exit(0)
+if len(gdb.selected_inferior().threads()) == 1:
+    print("SKIP: set to run on a single thread")
+    exit(0)
+
+try:
+    # Run the actual tests
+    run_test()
+except (gdb.error):
+    print("GDB Exception: %s" % (sys.exc_info()[0]))
+    failcount += 1
+    pass
+
+# Finally kill the inferior and exit gdb with a count of failures
+gdb.execute("kill")
+exit(failcount)
diff --git a/tests/tcg/multiarch/gdbstub/memory.py b/tests/tcg/multiarch/gdbstub/memory.py
index 67864ad..dd25e72 100644
--- a/tests/tcg/multiarch/gdbstub/memory.py
+++ b/tests/tcg/multiarch/gdbstub/memory.py
@@ -115,9 +115,6 @@ if gdb.parse_and_eval('$pc') == 0:
     exit(0)
 
 try:
-    # These are not very useful in scripts
-    gdb.execute("set pagination off")
-
     # Run the actual tests
     run_test()
 except (gdb.error):
diff --git a/tests/tcg/multiarch/gdbstub/sha1.py b/tests/tcg/multiarch/gdbstub/sha1.py
index 423b720..4167284 100644
--- a/tests/tcg/multiarch/gdbstub/sha1.py
+++ b/tests/tcg/multiarch/gdbstub/sha1.py
@@ -73,10 +73,6 @@ if gdb.parse_and_eval('$pc') == 0:
     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):
diff --git a/tests/tcg/multiarch/gdbstub/test-proc-mappings.py b/tests/tcg/multiarch/gdbstub/test-proc-mappings.py
index 5e3e5a2..04ec61d 100644
--- a/tests/tcg/multiarch/gdbstub/test-proc-mappings.py
+++ b/tests/tcg/multiarch/gdbstub/test-proc-mappings.py
@@ -51,10 +51,6 @@ def main():
         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:
diff --git a/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py b/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py
index d91e8fd..926fa96 100644
--- a/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py
+++ b/tests/tcg/multiarch/gdbstub/test-qxfer-auxv-read.py
@@ -42,10 +42,6 @@ if gdb.parse_and_eval('$pc') == 0:
     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):
diff --git a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
index 798d508..e57d2a8 100644
--- a/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
+++ b/tests/tcg/multiarch/gdbstub/test-thread-breakpoint.py
@@ -45,10 +45,6 @@ if gdb.parse_and_eval('$pc') == 0:
     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):
diff --git a/tests/tcg/multiarch/system/Makefile.softmmu-target b/tests/tcg/multiarch/system/Makefile.softmmu-target
index 7ba9053..90810a3 100644
--- a/tests/tcg/multiarch/system/Makefile.softmmu-target
+++ b/tests/tcg/multiarch/system/Makefile.softmmu-target
@@ -27,7 +27,15 @@ run-gdbstub-memory: memory
 		"-monitor none -display none -chardev file$(COMMA)path=$<.out$(COMMA)id=output $(QEMU_OPTS)" \
 		--bin $< --test $(MULTIARCH_SRC)/gdbstub/memory.py, \
 	softmmu gdbstub support)
-
+run-gdbstub-interrupt: interrupt
+	$(call run-test, $@, $(GDB_SCRIPT) \
+		--gdb $(HAVE_GDB_BIN) \
+		--qemu $(QEMU) \
+		--output $<.gdb.out \
+		--qargs \
+		"-smp 2 -monitor none -display none -chardev file$(COMMA)path=$<.out$(COMMA)id=output $(QEMU_OPTS)" \
+		--bin $< --test $(MULTIARCH_SRC)/gdbstub/interrupt.py, \
+	softmmu gdbstub support)
 run-gdbstub-untimely-packet: hello
 	$(call run-test, $@, $(GDB_SCRIPT) \
 		--gdb $(HAVE_GDB_BIN) \
@@ -37,10 +45,10 @@ run-gdbstub-untimely-packet: hello
 		--qemu $(QEMU) \
 		--bin $< --qargs \
 		"-monitor none -display none -chardev file$(COMMA)path=untimely-packet.out$(COMMA)id=output $(QEMU_OPTS)", \
-	"softmmu gdbstub untimely packets")
+	softmmu gdbstub untimely packets)
 	$(call quiet-command, \
 		(! grep -Fq 'Packet instead of Ack, ignoring it' untimely-packet.gdb.err), \
-		"GREP", "file  untimely-packet.gdb.err")
+		"GREP", file untimely-packet.gdb.err)
 else
 run-gdbstub-%:
 	$(call skip-test, "gdbstub test $*", "no guest arch support")
@@ -50,4 +58,4 @@ run-gdbstub-%:
 	$(call skip-test, "gdbstub test $*", "need working gdb")
 endif
 
-MULTIARCH_RUNS += run-gdbstub-memory run-gdbstub-untimely-packet
+MULTIARCH_RUNS += run-gdbstub-memory run-gdbstub-interrupt run-gdbstub-untimely-packet
diff --git a/tests/tcg/multiarch/system/interrupt.c b/tests/tcg/multiarch/system/interrupt.c
new file mode 100644
index 0000000..98d4f2e
--- /dev/null
+++ b/tests/tcg/multiarch/system/interrupt.c
@@ -0,0 +1,28 @@
+/*
+ * External interruption test. This test is structured in such a way that it
+ * passes the cases that require it to exit, but we can make it enter an
+ * infinite loop from GDB.
+ *
+ * We don't have the benefit of libc, just builtin C primitives and
+ * whatever is in minilib.
+ */
+
+#include <minilib.h>
+
+void loop(void)
+{
+    do {
+        /*
+         * Loop forever. Just make sure the condition is always a constant
+         * expression, so that this loop is not UB, as per the C
+         * standard.
+         */
+    } while (1);
+}
+
+int main(void)
+{
+    return 0;
+}
+
+
diff --git a/tests/tcg/s390x/gdbstub/test-signals-s390x.py b/tests/tcg/s390x/gdbstub/test-signals-s390x.py
index 80a284b..ca2bbc0 100644
--- a/tests/tcg/s390x/gdbstub/test-signals-s390x.py
+++ b/tests/tcg/s390x/gdbstub/test-signals-s390x.py
@@ -61,10 +61,6 @@ if gdb.parse_and_eval("$pc") == 0:
     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):
diff --git a/tests/tcg/s390x/gdbstub/test-svc.py b/tests/tcg/s390x/gdbstub/test-svc.py
index 18fad3f..804705f 100644
--- a/tests/tcg/s390x/gdbstub/test-svc.py
+++ b/tests/tcg/s390x/gdbstub/test-svc.py
@@ -49,10 +49,6 @@ def main():
         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: