From: Tom Tromey <tom@tromey.com>
Date: Sun, 5 Jun 2022 13:42:12 +0000 (-0600)
Subject: Accept gdb.Value in more Python APIs
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d19ca0b35c9536210c5e8bd30504489b7439f51f;p=binutils-gdb.git

Accept gdb.Value in more Python APIs

PR python/27000 points out that gdb.block_for_pc will accept a Python
integer, but not a gdb.Value.  This patch corrects this oversight.

I looked at all uses of GDB_PY_LLU_ARG and fixed these up to use
get_addr_from_python instead.  I also looked at uses of GDB_PY_LL_ARG,
but those seemed relatively unlikely to be useful with a gdb.Value, so
I didn't change them.  My thinking here is that a Value will typically
come from inferior memory, and something like a line number is not too
likely to be found this way.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=27000
---

diff --git a/gdb/python/py-arch.c b/gdb/python/py-arch.c
index d8098a2d161..594e4ed4918 100644
--- a/gdb/python/py-arch.c
+++ b/gdb/python/py-arch.c
@@ -122,39 +122,26 @@ static PyObject *
 archpy_disassemble (PyObject *self, PyObject *args, PyObject *kw)
 {
   static const char *keywords[] = { "start_pc", "end_pc", "count", NULL };
-  CORE_ADDR start, end = 0;
+  CORE_ADDR start = 0, end = 0;
   CORE_ADDR pc;
-  gdb_py_ulongest start_temp;
   long count = 0, i;
-  PyObject *end_obj = NULL, *count_obj = NULL;
+  PyObject *start_obj = nullptr, *end_obj = nullptr, *count_obj = nullptr;
   struct gdbarch *gdbarch = NULL;
 
   ARCHPY_REQUIRE_VALID (self, gdbarch);
 
-  if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, GDB_PY_LLU_ARG "|OO",
-					keywords, &start_temp, &end_obj,
+  if (!gdb_PyArg_ParseTupleAndKeywords (args, kw, "O|OO",
+					keywords, &start_obj, &end_obj,
 					&count_obj))
     return NULL;
 
-  start = start_temp;
-  if (end_obj)
-    {
-      /* Make a long logic check first.  In Python 3.x, internally,
-	 all integers are represented as longs.  In Python 2.x, there
-	 is still a differentiation internally between a PyInt and a
-	 PyLong.  Explicitly do this long check conversion first. In
-	 GDB, for Python 3.x, we #ifdef PyInt = PyLong.  This check has
-	 to be done first to ensure we do not lose information in the
-	 conversion process.  */
-      if (PyLong_Check (end_obj))
-	end = PyLong_AsUnsignedLongLong (end_obj);
-      else
-	{
-	  PyErr_SetString (PyExc_TypeError,
-			   _("Argument 'end_pc' should be a (long) integer."));
+  if (get_addr_from_python (start_obj, &start) < 0)
+    return nullptr;
 
-	  return NULL;
-	}
+  if (end_obj != nullptr)
+    {
+      if (get_addr_from_python (end_obj, &end) < 0)
+	return nullptr;
 
       if (end < start)
 	{
diff --git a/gdb/python/py-progspace.c b/gdb/python/py-progspace.c
index a9abfb4c777..5ec5986fce8 100644
--- a/gdb/python/py-progspace.c
+++ b/gdb/python/py-progspace.c
@@ -351,13 +351,17 @@ pspy_get_objfiles (PyObject *self_, PyObject *args)
 static PyObject *
 pspy_solib_name (PyObject *o, PyObject *args)
 {
-  gdb_py_ulongest pc;
+  CORE_ADDR pc;
+  PyObject *pc_obj;
+
   pspace_object *self = (pspace_object *) o;
 
   PSPY_REQUIRE_VALID (self);
 
-  if (!PyArg_ParseTuple (args, GDB_PY_LLU_ARG, &pc))
+  if (!PyArg_ParseTuple (args, "O", &pc_obj))
     return NULL;
+  if (get_addr_from_python (pc_obj, &pc) < 0)
+    return nullptr;
 
   const char *soname = solib_name_from_address (self->pspace, pc);
   if (soname == nullptr)
@@ -371,14 +375,17 @@ static PyObject *
 pspy_block_for_pc (PyObject *o, PyObject *args)
 {
   pspace_object *self = (pspace_object *) o;
-  gdb_py_ulongest pc;
+  CORE_ADDR pc;
+  PyObject *pc_obj;
   const struct block *block = NULL;
   struct compunit_symtab *cust = NULL;
 
   PSPY_REQUIRE_VALID (self);
 
-  if (!PyArg_ParseTuple (args, GDB_PY_LLU_ARG, &pc))
+  if (!PyArg_ParseTuple (args, "O", &pc_obj))
     return NULL;
+  if (get_addr_from_python (pc_obj, &pc) < 0)
+    return nullptr;
 
   try
     {
@@ -410,24 +417,25 @@ pspy_block_for_pc (PyObject *o, PyObject *args)
 static PyObject *
 pspy_find_pc_line (PyObject *o, PyObject *args)
 {
-  gdb_py_ulongest pc_llu;
+  CORE_ADDR pc;
   PyObject *result = NULL; /* init for gcc -Wall */
+  PyObject *pc_obj;
   pspace_object *self = (pspace_object *) o;
 
   PSPY_REQUIRE_VALID (self);
 
-  if (!PyArg_ParseTuple (args, GDB_PY_LLU_ARG, &pc_llu))
+  if (!PyArg_ParseTuple (args, "O", &pc_obj))
     return NULL;
+  if (get_addr_from_python (pc_obj, &pc) < 0)
+    return nullptr;
 
   try
     {
       struct symtab_and_line sal;
-      CORE_ADDR pc;
       scoped_restore_current_program_space saver;
 
       set_current_program_space (self->pspace);
 
-      pc = (CORE_ADDR) pc_llu;
       sal = find_pc_line (pc, 0);
       result = symtab_and_line_to_sal_object (sal);
     }
diff --git a/gdb/testsuite/gdb.python/py-arch.exp b/gdb/testsuite/gdb.python/py-arch.exp
index 58f6cb06b3e..1fbbc47c872 100644
--- a/gdb/testsuite/gdb.python/py-arch.exp
+++ b/gdb/testsuite/gdb.python/py-arch.exp
@@ -43,7 +43,7 @@ gdb_py_test_silent_cmd "python insn_list2 = arch.disassemble(pc, pc)" \
   "disassemble no count" 0
 gdb_py_test_silent_cmd "python insn_list3 = arch.disassemble(pc, count=1)" \
   "disassemble no end" 0
-gdb_py_test_silent_cmd "python insn_list4 = arch.disassemble(pc)" \
+gdb_py_test_silent_cmd "python insn_list4 = arch.disassemble(gdb.Value(pc))" \
   "disassemble no end no count" 0
 
 gdb_test "python print (len(insn_list1))" "1" "test number of instructions 1"
diff --git a/gdb/testsuite/gdb.python/py-progspace.exp b/gdb/testsuite/gdb.python/py-progspace.exp
index 6c7142c99d8..7c365850f35 100644
--- a/gdb/testsuite/gdb.python/py-progspace.exp
+++ b/gdb/testsuite/gdb.python/py-progspace.exp
@@ -60,6 +60,9 @@ if {![runto_main]} {
 set pc_val [get_integer_valueof "\$pc" 0]
 gdb_py_test_silent_cmd "python blk = gdb.current_progspace ().block_for_pc (${pc_val})" \
     "get block for the current \$pc" 1
+gdb_py_test_silent_cmd \
+    "python blk = gdb.current_progspace ().block_for_pc (gdb.Value(${pc_val}))" \
+    "get block for the current \$pc as value" 1
 gdb_test "python print (blk.start <= ${pc_val})" "True" \
     "block start is before \$pc"
 gdb_test "python print (blk.end >= ${pc_val})" "True" \
diff --git a/gdb/testsuite/gdb.python/py-shared.exp b/gdb/testsuite/gdb.python/py-shared.exp
index 2d3390284fe..7075bc5ee36 100644
--- a/gdb/testsuite/gdb.python/py-shared.exp
+++ b/gdb/testsuite/gdb.python/py-shared.exp
@@ -57,7 +57,10 @@ runto [gdb_get_line_number "Break to end."]
 # Test gdb.solib_name
 gdb_test "p &func1" "" "func1 address"
 gdb_py_test_silent_cmd "python func1 = gdb.history(0)" "Aquire func1 address" 1
-gdb_test "python print (gdb.solib_name(int(func1)))" "py-shared-sl.sl" "test func1 solib location"
+gdb_test "python print (gdb.solib_name(int(func1)))" "py-shared-sl.sl" \
+    "test func1 solib location"
+gdb_test "python print (gdb.solib_name(func1))" "py-shared-sl.sl" \
+    "test func1 solib location using Value"
 
 gdb_test "p &main" "" "main address"
 gdb_py_test_silent_cmd "python main = gdb.history(0)" "Aquire main address" 1
diff --git a/gdb/testsuite/gdb.python/python.exp b/gdb/testsuite/gdb.python/python.exp
index 7e0d4cb0c58..8c0da6daa26 100644
--- a/gdb/testsuite/gdb.python/python.exp
+++ b/gdb/testsuite/gdb.python/python.exp
@@ -514,6 +514,9 @@ gdb_test "python print (pc_rtn > pc_call)" "True" \
 
 gdb_test "python print (gdb.find_pc_line(pc_rtn).line >= line)" "True" \
     "test find_pc_line with resume address"
+gdb_test "python print (gdb.find_pc_line(pc_rtn).line == gdb.find_pc_line(gdb.Value(pc_rtn)).line)" \
+    "True" \
+    "test find_pc_line using Value"
 
 gdb_test_no_output "set variable \$cvar1 = 23" "set convenience variable"
 gdb_test "python print(gdb.convenience_variable('cvar1'))" "23"