The reason the ppc64 and s390x test where failing was because gdb hides them although they are still accessible via regnum. We can re-arrange the test a little bit and include these two arches in our test. We still don't explicitly fail for registers that just disappear like in the ARM case: xml-tdesc has 228 registers remote-registers has 219 registers of which 0 are hidden {'name': 'CNTP_CVAL', 'regnum': 96} wasn't seen in remote-registers {'name': 'CNTV_CVAL', 'regnum': 101} wasn't seen in remote-registers {'name': 'PAR', 'regnum': 113} wasn't seen in remote-registers {'name': 'CPUACTLR', 'regnum': 114} wasn't seen in remote-registers {'name': 'CPUECTLR', 'regnum': 127} wasn't seen in remote-registers {'name': 'CPUMERRSR', 'regnum': 140} wasn't seen in remote-registers {'name': 'TTBR1', 'regnum': 148} wasn't seen in remote-registers {'name': 'L2MERRSR', 'regnum': 161} wasn't seen in remote-registers {'name': 'TTBR0', 'regnum': 168} wasn't seen in remote-registers Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx> Cc: Ilya Leoshkevich <iii@xxxxxxxxxxxxx> Cc: qemu-s390x@xxxxxxxxxx Cc: Nicholas Piggin <npiggin@xxxxxxxxx> Cc: Daniel Henrique Barboza <danielhb413@xxxxxxxxx> Cc: qemu-ppc@xxxxxxxxxx Cc: Luis Machado <luis.machado@xxxxxxx> --- v2 - skip if check for total_regs != total_r_regs and always dump what is elided/missed --- tests/tcg/multiarch/gdbstub/registers.py | 87 +++++++++++++++++------- tests/tcg/ppc64/Makefile.target | 7 -- tests/tcg/s390x/Makefile.target | 4 -- 3 files changed, 64 insertions(+), 34 deletions(-) diff --git a/tests/tcg/multiarch/gdbstub/registers.py b/tests/tcg/multiarch/gdbstub/registers.py index ff6076b09e..8ba14099b5 100644 --- a/tests/tcg/multiarch/gdbstub/registers.py +++ b/tests/tcg/multiarch/gdbstub/registers.py @@ -44,7 +44,6 @@ def fetch_xml_regmap(): total_regs = 0 reg_map = {} - frame = gdb.selected_frame() tree = ET.fromstring(xml) for f in tree.findall("feature"): @@ -61,12 +60,8 @@ def fetch_xml_regmap(): for r in regs: name = r.attrib["name"] regnum = int(r.attrib["regnum"]) - try: - value = frame.read_register(name) - except ValueError: - report(False, f"failed to read reg: {name}") - entry = { "name": name, "initial": value, "regnum": regnum } + entry = { "name": name, "regnum": regnum } if name in reg_map: report(False, f"duplicate register {entry} vs {reg_map[name]}") @@ -80,6 +75,15 @@ def fetch_xml_regmap(): return reg_map +def get_register_by_regnum(reg_map, regnum): + """ + Helper to find a register from the map via its XML regnum + """ + for regname, entry in reg_map.items(): + if entry['regnum'] == regnum: + return entry + return None + def crosscheck_remote_xml(reg_map): """ Cross-check the list of remote-registers with the XML info. @@ -90,6 +94,7 @@ def crosscheck_remote_xml(reg_map): total_regs = len(reg_map.keys()) total_r_regs = 0 + total_r_elided_regs = 0 for r in r_regs: fields = r.split() @@ -100,6 +105,15 @@ def crosscheck_remote_xml(reg_map): r_name = fields[0] r_regnum = int(fields[6]) + # Some registers are "hidden" so don't have a name + # although they still should have a register number + if r_name == "''": + total_r_elided_regs += 1 + x_reg = get_register_by_regnum(reg_map, r_regnum) + if x_reg is not None: + x_reg["hidden"] = True + continue + # check in the XML try: x_reg = reg_map[r_name] @@ -117,14 +131,39 @@ def crosscheck_remote_xml(reg_map): # Just print a mismatch in totals as gdb will filter out 64 bit # registers on a 32 bit machine. Also print what is missing to # help with debug. - if total_regs != total_r_regs: - print(f"xml-tdesc has ({total_regs}) registers") - print(f"remote-registers has ({total_r_regs}) registers") + print(f"xml-tdesc has {total_regs} registers") + print(f"remote-registers has {total_r_regs} registers") + print(f"of which {total_r_elided_regs} are hidden") + + for x_key in reg_map.keys(): + x_reg = reg_map[x_key] + if "hidden" in x_reg: + print(f"{x_reg} elided by gdb") + elif "seen" not in x_reg: + print(f"{x_reg} wasn't seen in remote-registers") + +def initial_register_read(reg_map): + """ + Do an initial read of all registers that we know gdb cares about + (so ignore the elided ones). + """ + frame = gdb.selected_frame() + + for e in reg_map.values(): + name = e["name"] + regnum = e["regnum"] + + try: + if "hidden" in e: + value = frame.read_register(regnum) + e["initial"] = value + elif "seen" in e: + value = frame.read_register(name) + e["initial"] = value + + except ValueError: + report(False, f"failed to read reg: {name}") - for x_key in reg_map.keys(): - x_reg = reg_map[x_key] - if "seen" not in x_reg: - print(f"{x_reg} wasn't seen in remote-registers") def complete_and_diff(reg_map): """ @@ -144,18 +183,19 @@ def complete_and_diff(reg_map): changed = 0 for e in reg_map.values(): - name = e["name"] - old_val = e["initial"] + if "initial" in e and "hidden" not in e: + name = e["name"] + old_val = e["initial"] - try: - new_val = frame.read_register(name) - except: - report(False, f"failed to read {name} at end of run") - continue + try: + new_val = frame.read_register(name) + except ValueError: + report(False, f"failed to read {name} at end of run") + continue - if new_val != old_val: - print(f"{name} changes from {old_val} to {new_val}") - changed += 1 + if new_val != old_val: + print(f"{name} changes from {old_val} to {new_val}") + changed += 1 # as long as something changed we can be confident its working report(changed > 0, f"{changed} registers were changed") @@ -168,6 +208,7 @@ def run_test(): if reg_map is not None: crosscheck_remote_xml(reg_map) + initial_register_read(reg_map) complete_and_diff(reg_map) diff --git a/tests/tcg/ppc64/Makefile.target b/tests/tcg/ppc64/Makefile.target index 1d08076756..5721c159f2 100644 --- a/tests/tcg/ppc64/Makefile.target +++ b/tests/tcg/ppc64/Makefile.target @@ -38,11 +38,4 @@ PPC64_TESTS += signal_save_restore_xer PPC64_TESTS += xxspltw PPC64_TESTS += test-aes -ifneq ($(GDB),) -# Skip for now until vsx registers sorted out -run-gdbstub-registers: - $(call skip-test, $<, "BROKEN reading VSX registers") -endif - - TESTS += $(PPC64_TESTS) diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target index 46544fecd4..0e670f3f8b 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -103,10 +103,6 @@ run-gdbstub-svc: hello-s390x-asm --bin $< --test $(S390X_SRC)/gdbstub/test-svc.py, \ single-stepping svc) -# Skip for now until vx registers sorted out -run-gdbstub-registers: - $(call skip-test, $<, "BROKEN reading VX registers") - EXTRA_RUNS += run-gdbstub-signals-s390x run-gdbstub-svc endif -- 2.39.2 _______________________________________________ Devel mailing list -- devel@xxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxx