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Match static function variables (#530)

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* Match static function variables

* IsleApp::Tick static variables
This commit is contained in:
MS 2024-02-05 06:43:13 -05:00 committed by GitHub
parent 0497ef13fb
commit 264b9e815b
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GPG key ID: B5690EEEBB952194
10 changed files with 167 additions and 17 deletions
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2
CMakeLists.txt
View file

@ -415,8 +415,8 @@ set_property(TARGET lego1 PROPERTY SUFFIX ".DLL")
if (ISLE_BUILD_APP)
add_executable(isle WIN32
ISLE/res/isle.rc
ISLE/isleapp.cpp
ISLE/define.cpp
ISLE/isleapp.cpp
)
target_compile_definitions(isle PRIVATE ISLE_APP)

6
ISLE/define.cpp
View file

@ -32,9 +32,3 @@ int g_targetDepth = 16;
// GLOBAL: ISLE 0x410064
int g_reqEnableRMDevice = 0;
// GLOBAL: ISLE 0x4101bc
int g_startupDelay = 200;
// GLOBAL: ISLE 0x4101c0
MxLong g_lastFrameTime = 0;

2
ISLE/define.h
View file

@ -21,7 +21,5 @@ extern int g_targetWidth;
extern int g_targetHeight;
extern int g_targetDepth;
extern int g_reqEnableRMDevice;
extern int g_startupDelay;
extern MxLong g_lastFrameTime;
#endif // DEFINE_H

6
ISLE/isleapp.cpp
View file

@ -765,6 +765,12 @@ void IsleApp::LoadConfig()
// FUNCTION: ISLE 0x402c20
inline void IsleApp::Tick(BOOL sleepIfNotNextFrame)
{
// GLOBAL: ISLE 0x4101c0
static MxLong g_lastFrameTime = 0;
// GLOBAL: ISLE 0x4101bc
static int g_startupDelay = 200;
if (!this->m_windowActive) {
Sleep(0);
return;

9
tools/isledecomp/isledecomp/compare/core.py
View file

@ -134,7 +134,9 @@ def _load_cvdump(self):
except UnicodeDecodeError:
pass
self._db.set_recomp_symbol(addr, sym.node_type, sym.name(), sym.size())
self._db.set_recomp_symbol(
addr, sym.node_type, sym.name(), sym.decorated_name, sym.size()
)
for lineref in cv.lines:
addr = self.recomp_bin.get_abs_addr(lineref.section, lineref.offset)
@ -168,6 +170,11 @@ def _load_markers(self):
self._db.skip_compare(fun.offset)
for var in codebase.iter_variables():
if var.is_static and var.parent_function is not None:
self._db.match_static_variable(
var.offset, var.name, var.parent_function
)
else:
self._db.match_variable(var.offset, var.name)
for tbl in codebase.iter_vtables():

56
tools/isledecomp/isledecomp/compare/db.py
View file

@ -12,6 +12,7 @@
orig_addr int,
recomp_addr int,
name text,
decorated_name text,
size int,
should_skip int default(FALSE)
);
@ -65,12 +66,13 @@ def set_recomp_symbol(
addr: int,
compare_type: Optional[SymbolType],
name: Optional[str],
decorated_name: Optional[str],
size: Optional[int],
):
compare_value = compare_type.value if compare_type is not None else None
self._db.execute(
"INSERT INTO `symbols` (recomp_addr, compare_type, name, size) VALUES (?,?,?,?)",
(addr, compare_value, name, size),
"INSERT INTO `symbols` (recomp_addr, compare_type, name, decorated_name, size) VALUES (?,?,?,?,?)",
(addr, compare_value, name, decorated_name, size),
)
def get_unmatched_strings(self) -> List[str]:
@ -214,6 +216,56 @@ def match_vtable(self, addr: int, name: str) -> bool:
return did_match
def match_static_variable(self, addr: int, name: str, function_addr: int) -> bool:
"""Matching a static function variable by combining the variable name
with the decorated (mangled) name of its parent function."""
cur = self._db.execute(
"""SELECT name, decorated_name
FROM `symbols`
WHERE orig_addr = ?""",
(function_addr,),
)
if (result := cur.fetchone()) is None:
logger.error("No function for static variable: %s", name)
return False
# Get the friendly name for the "failed to match" error message
(function_name, decorated_name) = result
# Now we have to combine the variable name (read from the marker)
# and the decorated name of the enclosing function (the above variable)
# into a LIKE clause and try to match.
# For example, the variable "g_startupDelay" from function "IsleApp::Tick"
# has symbol: "?g_startupDelay@?1??Tick@IsleApp@@QAEXH@Z@4HA"
# The function's decorated name is: "?Tick@IsleApp@@QAEXH@Z"
cur = self._db.execute(
"""UPDATE `symbols`
SET orig_addr = ?
WHERE name LIKE '%' || ? || '%' || ? || '%'
AND orig_addr IS NULL
AND (compare_type = ? OR compare_type = ? OR compare_type IS NULL)""",
(
addr,
name,
decorated_name,
SymbolType.DATA.value,
SymbolType.POINTER.value,
),
)
did_match = cur.rowcount > 0
if not did_match:
logger.error(
"Failed to match static variable %s from function %s",
name,
function_name,
)
return did_match
def match_variable(self, addr: int, name: str) -> bool:
did_match = self._match_on(SymbolType.DATA, addr, name) or self._match_on(
SymbolType.POINTER, addr, name

4
tools/isledecomp/isledecomp/parser/error.py
View file

@ -47,6 +47,10 @@ class ParserError(Enum):
# to ignore things like string literal that are not variables.
GLOBAL_NOT_VARIABLE = 111
# WARN: A marked static variable inside a function needs to have its
# function marked too, and in the same module.
ORPHANED_STATIC_VARIABLE = 112
# This code or higher is an error, not a warning
DECOMP_ERROR_START = 200

1
tools/isledecomp/isledecomp/parser/node.py
View file

@ -50,6 +50,7 @@ def is_nameref(self) -> bool:
@dataclass
class ParserVariable(ParserSymbol):
is_static: bool = False
parent_function: Optional[int] = None
@dataclass

24
tools/isledecomp/isledecomp/parser/parser.py
View file

@ -13,6 +13,7 @@
)
from .marker import (
DecompMarker,
MarkerCategory,
match_marker,
is_marker_exact,
)
@ -53,6 +54,9 @@ def insert(self, marker: DecompMarker) -> bool:
self.markers[key] = marker
return False
def query(self, category: MarkerCategory, module: str) -> Optional[DecompMarker]:
return self.markers.get((category, module))
def iter(self) -> Iterator[DecompMarker]:
for _, marker in self.markers.items():
yield marker
@ -305,6 +309,23 @@ def _variable_done(
)
)
else:
parent_function = None
is_static = self.state == ReaderState.IN_FUNC_GLOBAL
# If this is a static variable, we need to get the function
# where it resides so that we can match it up later with the
# mangled names of both variable and function from cvdump.
if is_static:
fun_marker = self.fun_markers.query(
MarkerCategory.FUNCTION, marker.module
)
if fun_marker is None:
self._syntax_warning(ParserError.ORPHANED_STATIC_VARIABLE)
continue
parent_function = fun_marker.offset
self._symbols.append(
ParserVariable(
type=marker.type,
@ -312,7 +333,8 @@ def _variable_done(
module=marker.module,
offset=marker.offset,
name=self.curly.get_prefix(variable_name),
is_static=self.state == ReaderState.IN_FUNC_GLOBAL,
is_static=is_static,
parent_function=parent_function,
)
)

72
tools/isledecomp/tests/test_parser.py
View file

@ -419,8 +419,7 @@ def test_static_variable(parser):
"""We can detect whether a variable is a static function variable
based on the parser's state when we detect it.
Checking for the word `static` alone is not a good test.
Static class variables are filed as S_GDATA32, same as regular globals.
Only function statics are filed as S_LDATA32."""
Static class variables are filed as S_GDATA32, same as regular globals."""
parser.read_lines(
[
@ -436,7 +435,7 @@ def test_static_variable(parser):
"// FUNCTION: TEST 0x5555",
"void test_function() {",
"// GLOBAL: TEST 0x8888",
"int g_internal = 0;",
"static int g_internal = 0;",
"}",
]
)
@ -629,3 +628,70 @@ def test_match_qualified_variable(parser):
assert len(parser.variables) == 1
assert parser.variables[0].name == "MxTest::g_count"
assert len(parser.alerts) == 0
def test_static_variable_parent(parser):
"""Report the address of the parent function that contains a static variable."""
parser.read_lines(
[
"// FUNCTION: TEST 0x1234",
"void test()",
"{",
" // GLOBAL: TEST 0x5555",
" static int g_count = 0;",
"}",
]
)
assert len(parser.variables) == 1
assert parser.variables[0].is_static is True
assert parser.variables[0].parent_function == 0x1234
@pytest.mark.xfail(
reason="""Without the FUNCTION marker we don't know that we are inside a function,
so we do not identify this variable as static."""
)
def test_static_variable_no_parent(parser):
"""If the function that contains a static variable is not marked, we
cannot match it with cvdump so we should skip it and report an error."""
parser.read_lines(
[
"void test()",
"{",
" // GLOBAL: TEST 0x5555",
" static int g_count = 0;",
"}",
]
)
# No way to match this variable so don't report it
assert len(parser.variables) == 0
assert len(parser.alerts) == 1
assert parser.alerts[0].code == ParserError.ORPHANED_STATIC_VARIABLE
def test_static_variable_incomplete_coverage(parser):
"""If the function that contains a static variable is marked, but
not for each module used for the variable itself, this is an error."""
parser.read_lines(
[
"// FUNCTION: HELLO 0x1234",
"void test()",
"{",
" // GLOBAL: HELLO 0x5555",
" // GLOBAL: TEST 0x5555",
" static int g_count = 0;",
"}",
]
)
# Match for HELLO module
assert len(parser.variables) == 1
# Failed for TEST module
assert len(parser.alerts) == 1
assert parser.alerts[0].code == ParserError.ORPHANED_STATIC_VARIABLE