[PATCH v3 8/8] tests/tcg: Add a test for info proc mappings

[Ilya Leoshkevich]

Add a small test to prevent regressions.
Since there are issues with how GDB interprets QEMU's target.xml,
enable the test only on aarch64 and s390x for now.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tests/tcg/aarch64/Makefile.target             |  3 +-
 tests/tcg/multiarch/Makefile.target           |  7 +++
 .../multiarch/gdbstub/test-proc-mappings.py   | 55 +++++++++++++++++++
 tests/tcg/s390x/Makefile.target               |  2 +-
 4 files changed, 65 insertions(+), 2 deletions(-)
 create mode 100644 tests/tcg/multiarch/gdbstub/test-proc-mappings.py

diff --git a/tests/tcg/aarch64/Makefile.target 
b/tests/tcg/aarch64/Makefile.target
index 03157954871..38402b0ba1f 100644
--- a/tests/tcg/aarch64/Makefile.target
+++ b/tests/tcg/aarch64/Makefile.target
@@ -97,7 +97,8 @@ run-gdbstub-sve-ioctls: sve-ioctls
                --bin $< --test $(AARCH64_SRC)/gdbstub/test-sve-ioctl.py, \
        basic gdbstub SVE ZLEN support)
 
-EXTRA_RUNS += run-gdbstub-sysregs run-gdbstub-sve-ioctls
+EXTRA_RUNS += run-gdbstub-sysregs run-gdbstub-sve-ioctls \
+              run-gdbstub-proc-mappings
 endif
 endif
 
diff --git a/tests/tcg/multiarch/Makefile.target 
b/tests/tcg/multiarch/Makefile.target
index 373db696481..cbc0b75787a 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -81,6 +81,13 @@ run-gdbstub-qxfer-auxv-read: sha1
                --bin $< --test 
$(MULTIARCH_SRC)/gdbstub/test-qxfer-auxv-read.py, \
        basic gdbstub qXfer:auxv:read support)
 
+run-gdbstub-proc-mappings: sha1
+       $(call run-test, $@, $(GDB_SCRIPT) \
+               --gdb $(HAVE_GDB_BIN) \
+               --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \
+               --bin $< --test $(MULTIARCH_SRC)/gdbstub/test-proc-mappings.py, 
\
+       proc mappings support)
+
 run-gdbstub-thread-breakpoint: testthread
        $(call run-test, $@, $(GDB_SCRIPT) \
                --gdb $(HAVE_GDB_BIN) \
diff --git a/tests/tcg/multiarch/gdbstub/test-proc-mappings.py 
b/tests/tcg/multiarch/gdbstub/test-proc-mappings.py
new file mode 100644
index 00000000000..657e36a2fc7
--- /dev/null
+++ b/tests/tcg/multiarch/gdbstub/test-proc-mappings.py
@@ -0,0 +1,55 @@
+"""Test that gdbstub has access to proc mappings.
+
+This runs as a sourced script (via -x, via run-test.py)."""
+from __future__ import print_function
+import gdb
+import sys
+
+
+n_failures = 0
+
+
+def report(cond, msg):
+    """Report success/fail of a test"""
+    if cond:
+        print("PASS: {}".format(msg))
+    else:
+        print("FAIL: {}".format(msg))
+        global n_failures
+        n_failures += 1
+
+
+def run_test():
+    """Run through the tests one by one"""
+    mappings = gdb.execute("info proc mappings", False, True)
+    report(isinstance(mappings, str), "Fetched the mappings from the inferior")
+    report("/sha1" in mappings, "Found the test binary name in the mappings")
+
+
+def main():
+    """Prepare the environment and run through the tests"""
+    try:
+        inferior = gdb.selected_inferior()
+        print("ATTACHED: {}".format(inferior.architecture().name()))
+    except (gdb.error, AttributeError):
+        print("SKIPPING (not connected)")
+        exit(0)
+
+    if gdb.parse_and_eval('$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:
+        report(False, "GDB Exception: {}".format(sys.exc_info()[0]))
+    print("All tests complete: %d failures" % n_failures)
+    exit(n_failures)
+
+
+main()
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index 4899503e1db..d33960caa0a 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -78,7 +78,7 @@ run-gdbstub-signals-s390x: signals-s390x
                --bin $< --test $(S390X_SRC)/gdbstub/test-signals-s390x.py, \
        mixing signals and debugging)
 
-EXTRA_RUNS += run-gdbstub-signals-s390x
+EXTRA_RUNS += run-gdbstub-signals-s390x run-gdbstub-proc-mappings
 endif
 
 # MVX versions of sha512
-- 
2.40.1