Make sure that qemu gdbstub, like gdbserver, allows reading from and
writing to PROT_NONE pages.
Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
tests/tcg/multiarch/Makefile.target | 9 +++++-
tests/tcg/multiarch/gdbstub/prot-none.py | 22 ++++++++++++++
tests/tcg/multiarch/prot-none.c | 38 ++++++++++++++++++++++++
3 files changed, 68 insertions(+), 1 deletion(-)
create mode 100644 tests/tcg/multiarch/gdbstub/prot-none.py
create mode 100644 tests/tcg/multiarch/prot-none.c
diff --git a/tests/tcg/multiarch/Makefile.target
b/tests/tcg/multiarch/Makefile.target
index d31ba8d6ae4..315a2e13588 100644
--- a/tests/tcg/multiarch/Makefile.target
+++ b/tests/tcg/multiarch/Makefile.target
@@ -101,13 +101,20 @@ run-gdbstub-registers: sha512
--bin $< --test $(MULTIARCH_SRC)/gdbstub/registers.py, \
checking register enumeration)
+run-gdbstub-prot-none: prot-none
+ $(call run-test, $@, env PROT_NONE_PY=1 $(GDB_SCRIPT) \
+ --gdb $(GDB) \
+ --qemu $(QEMU) --qargs "$(QEMU_OPTS)" \
+ --bin $< --test $(MULTIARCH_SRC)/gdbstub/prot-none.py, \
+ accessing PROT_NONE memory)
+
else
run-gdbstub-%:
$(call skip-test, "gdbstub test $*", "need working gdb with $(patsubst
-%,,$(TARGET_NAME)) support")
endif
EXTRA_RUNS += run-gdbstub-sha1 run-gdbstub-qxfer-auxv-read \
run-gdbstub-proc-mappings run-gdbstub-thread-breakpoint \
- run-gdbstub-registers
+ run-gdbstub-registers run-gdbstub-prot-none
# ARM Compatible Semi Hosting Tests
#
diff --git a/tests/tcg/multiarch/gdbstub/prot-none.py
b/tests/tcg/multiarch/gdbstub/prot-none.py
new file mode 100644
index 00000000000..751e44d5b93
--- /dev/null
+++ b/tests/tcg/multiarch/gdbstub/prot-none.py
@@ -0,0 +1,22 @@
+"""Test that GDB can access PROT_NONE pages.
+
+This runs as a sourced script (via -x, via run-test.py).
+
+SPDX-License-Identifier: GPL-2.0-or-later
+"""
+from test_gdbstub import main, report
+
+
+def run_test():
+ """Run through the tests one by one"""
+ gdb.Breakpoint("break_here")
+ gdb.execute("continue")
+ val = int(gdb.parse_and_eval("*p"))
+ report(val == 42, "{} != 42".format(val))
+ gdb.execute("set *p = 24")
+ gdb.execute("continue")
+ exitcode = int(gdb.parse_and_eval("$_exitcode"))
+ report(exitcode == 0, "{} != 0".format(exitcode))
+
+
+main(run_test)
diff --git a/tests/tcg/multiarch/prot-none.c b/tests/tcg/multiarch/prot-none.c
new file mode 100644
index 00000000000..66e38065cf0
--- /dev/null
+++ b/tests/tcg/multiarch/prot-none.c
@@ -0,0 +1,38 @@
+/*
+ * Test that GDB can access PROT_NONE pages.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#include <assert.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+void break_here(long *p)
+{
+}
+
+int main(void)
+{
+ long pagesize = sysconf(_SC_PAGESIZE);
+ int err;
+ long *p;
+
+ p = mmap(NULL, pagesize, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+ assert(p != MAP_FAILED);
+ *p = 42;
+
+ err = mprotect(p, pagesize, PROT_NONE);
+ assert(err == 0);
+
+ break_here(p);
+
+ err = mprotect(p, pagesize, PROT_READ);
+ assert(err == 0);
+ if (getenv("PROT_NONE_PY")) {
+ assert(*p == 24);
+ }
+
+ return EXIT_SUCCESS;
+}
--
2.43.0
