class QTraceViewer(QWidget):
TAG_SPACING = 50
LEGEND_X = -50
LEGEND_Y = 0
LEGEND_WIDTH = 10
TRACE_FUNC_X = 0
TRACE_FUNC_Y = 0
TRACE_FUNC_WIDTH = 50
TRACE_FUNC_MINHEIGHT = 1000
MARK_X = LEGEND_X
MARK_WIDTH = TRACE_FUNC_X - LEGEND_X + TRACE_FUNC_WIDTH
MARK_HEIGHT = 1
def __init__(self, workspace, disasm_view, parent=None):
super().__init__(parent=parent)
self.workspace = workspace
self.disasm_view = disasm_view
self.view = None
self.scene = None
self.mark = None
self.curr_position = 0
self._use_precise_position = False
self._init_widgets()
self.trace.am_subscribe(self._on_set_trace)
self.selected_ins.am_subscribe(self._on_select_ins)
self.view.installEventFilter(self)
#
# Forwarding properties
#
@property
def trace(self):
return self.workspace.instance.trace
@property
def selected_ins(self):
return self.disasm_view.infodock.selected_insns
def _init_widgets(self):
self.view = QGraphicsView()
self.scene = QGraphicsScene()
self.view.setScene(self.scene)
self._reset()
layout = QHBoxLayout()
layout.addWidget(self.view)
layout.setContentsMargins(0, 0, 0, 0)
layout.setAlignment(self.view, Qt.AlignLeft)
self.setLayout(layout)
def _reset(self):
self.scene.clear() #clear items
self.mark = None
self.legend = None
self.legend_height = 0
self.trace_func = QGraphicsItemGroup()
self.scene.addItem(self.trace_func)
self.hide()
def _on_set_trace(self, **kwargs):
self._reset()
if self.trace.am_obj is not None:
l.debug('minheight: %d, count: %d', self.TRACE_FUNC_MINHEIGHT,
self.trace.count)
if self.trace.count <= 0:
l.warning(
"No valid addresses found in trace to show. Check base address offsets?"
)
self.trace.am_obj = None
self.trace.am_event()
return
if self.TRACE_FUNC_MINHEIGHT < self.trace.count * 15:
self.trace_func_unit_height = 15
show_func_tag = True
else:
self.trace_func_unit_height = self.TRACE_FUNC_MINHEIGHT / self.trace.count
show_func_tag = True
self.legend_height = int(self.trace.count *
self.trace_func_unit_height)
self._show_trace_func(show_func_tag)
self._show_legend()
self._set_mark_color()
self.scene.setSceneRect(self.scene.itemsBoundingRect()) #resize
self.setFixedWidth(self.scene.itemsBoundingRect().width())
self.view.setFixedWidth(self.scene.itemsBoundingRect().width())
self.show()
def _on_select_ins(self, **kwargs):
if self.trace == None:
return
if self.mark is not None:
for i in self.mark.childItems():
self.mark.removeFromGroup(i)
self.scene.removeItem(i)
self.scene.removeItem(self.mark)
self.mark = QGraphicsItemGroup()
self.scene.addItem(self.mark)
if self.selected_ins:
addr = next(iter(self.selected_ins))
positions = self.trace.get_positions(addr)
if positions: #if addr is in list of positions
if not self._use_precise_position: #handle case where insn was selected from disas view
self.curr_position = positions[0] - self.trace.count
for p in positions:
color = self._get_mark_color(p, self.trace.count)
y = self._get_mark_y(p, self.trace.count)
if p == self.trace.count + self.curr_position: #add thicker line for 'current' mark
self.mark.addToGroup(
self.scene.addRect(self.MARK_X, y, self.MARK_WIDTH,
self.MARK_HEIGHT * 4,
QPen(QColor('black')),
QBrush(color)))
else:
self.mark.addToGroup(
self.scene.addRect(self.MARK_X, y, self.MARK_WIDTH,
self.MARK_HEIGHT, QPen(color),
QBrush(color)))
#y = self._get_mark_y(positions[0], self.trace.count)
#self.view.verticalScrollBar().setValue(y - 0.5 * self.view.size().height())
self.scene.update() #force redraw of the scene
self.scroll_to_position(self.curr_position)
def scroll_to_position(self, position):
relative_pos = self.trace.count + position
y_offset = self._get_mark_y(relative_pos, self.trace.count)
scrollValue = 0
if y_offset > 0.5 * self.view.size().height():
scrollValue = y_offset - 0.5 * self.view.size().height()
scrollValue = min(scrollValue, self.view.verticalScrollBar().maximum())
self.view.verticalScrollBar().setValue(scrollValue)
self._use_precise_position = False
def jump_next_insn(self):
if self.curr_position + self.trace.count < self.trace.count - 1: #for some reason indexing is done backwards
self.curr_position += 1
self._use_precise_position = True
func_name = self.trace.trace_func[self.curr_position].func_name
func = self._get_func_from_func_name(func_name)
bbl_addr = self.trace.trace_func[self.curr_position].bbl_addr
self._jump_bbl(func, bbl_addr)
def jump_prev_insn(self):
if self.curr_position + self.trace.count > 0:
self.curr_position -= 1
self._use_precise_position = True
func_name = self.trace.trace_func[self.curr_position].func_name
func = self._get_func_from_func_name(func_name)
bbl_addr = self.trace.trace_func[self.curr_position].bbl_addr
self._jump_bbl(func, bbl_addr)
def eventFilter(self, object, event): #specifically to catch arrow keys
# more elegant solution to link w/ self.view's scroll bar keypressevent?
if event.type() == QEvent.Type.KeyPress:
if not (event.modifiers() & Qt.ShiftModifier): #shift + arrowkeys
return False
key = event.key()
if key == Qt.Key_Up or key == Qt.Key_Left:
self.jump_prev_insn()
elif key == Qt.Key_Down or key == Qt.Key_Right:
self.jump_next_insn()
return True
return False # pass through all other events
def mousePressEvent(self, event):
button = event.button()
pos = self._to_logical_pos(event.pos())
if button == Qt.LeftButton and self._at_legend(pos):
func = self._get_func_from_y(pos.y())
bbl_addr = self._get_bbl_from_y(pos.y())
self._use_precise_position = True
self.curr_position = self._get_position(pos.y())
self._jump_bbl(func, bbl_addr)
def _jump_bbl(self, func, bbl_addr):
all_insn_addrs = self.workspace.instance.project.factory.block(
bbl_addr).instruction_addrs
# TODO: replace this with am_events perhaps?
self.workspace.on_function_selected(func)
self.selected_ins.clear()
self.selected_ins.update(all_insn_addrs)
self.selected_ins.am_event()
# TODO: this ought to happen automatically as a result of the am_event
self.disasm_view.current_graph.show_instruction(bbl_addr)
def _get_mark_color(self, i, total):
relative_gradient_pos = i * 1000 // total
return self.legend_img.pixelColor(self.LEGEND_WIDTH // 2,
relative_gradient_pos)
def _get_mark_y(self, i, total):
return self.TRACE_FUNC_Y + self.trace_func_unit_height * i
def _show_trace_func(self, show_func_tag):
x = self.TRACE_FUNC_X
y = self.TRACE_FUNC_Y
prev_name = None
for position in self.trace.trace_func:
bbl_addr = position.bbl_addr
func_name = position.func_name
l.debug('Draw function %x, %s', bbl_addr, func_name)
color = self.trace.get_func_color(func_name)
self.trace_func.addToGroup(
self.scene.addRect(x, y, self.TRACE_FUNC_WIDTH,
self.trace_func_unit_height, QPen(color),
QBrush(color)))
if show_func_tag is True and func_name != prev_name:
tag = self.scene.addText(func_name,
QFont("Source Code Pro", 7))
tag.setPos(x + self.TRACE_FUNC_WIDTH + self.TAG_SPACING,
y - tag.boundingRect().height() // 2)
self.trace_func.addToGroup(tag)
anchor = self.scene.addLine(
self.TRACE_FUNC_X + self.TRACE_FUNC_WIDTH, y,
x + self.TRACE_FUNC_WIDTH + self.TAG_SPACING, y)
self.trace_func.addToGroup(anchor)
prev_name = func_name
y += self.trace_func_unit_height
def _make_legend_gradient(self, x1, y1, x2, y2):
gradient = QLinearGradient(x1, y1, x2, y2)
gradient.setColorAt(0.0, Qt.red)
gradient.setColorAt(0.4, Qt.yellow)
gradient.setColorAt(0.6, Qt.green)
gradient.setColorAt(0.8, Qt.blue)
gradient.setColorAt(1.0, Qt.darkBlue)
return gradient
def _show_legend(self):
pen = QPen(Qt.transparent)
gradient = self._make_legend_gradient(
self.LEGEND_X, self.LEGEND_Y, self.LEGEND_X,
self.LEGEND_Y + self.legend_height)
brush = QBrush(gradient)
self.legend = self.scene.addRect(self.LEGEND_X, self.LEGEND_Y,
self.LEGEND_WIDTH, self.legend_height,
pen, brush)
reference_gradient = self._make_legend_gradient(
0, 0, self.LEGEND_WIDTH, 1000)
base_img = QImage(self.LEGEND_WIDTH, 1000, QImage.Format.Format_ARGB32)
p = QPainter(base_img)
p.fillRect(base_img.rect(), reference_gradient)
self.legend_img = base_img #reference shade
def _set_mark_color(self):
for p in range(self.trace.count):
color = self._get_mark_color(p, self.trace.count)
self.trace.set_mark_color(p, color)
def _at_legend(self, pos):
x = pos.x()
y = pos.y()
if self.TRACE_FUNC_X + self.LEGEND_X < x < self.view.width() and \
self.TRACE_FUNC_Y < y < self.TRACE_FUNC_Y + self.legend_height:
return True
else:
return False
def _to_logical_pos(self, pos):
x_offset = self.view.horizontalScrollBar().value()
y_offset = self.view.verticalScrollBar().value()
return QPoint(pos.x() + x_offset, pos.y() + y_offset)
def _get_position(self, y):
y_relative = y - self.legend_height
return int(y_relative // self.trace_func_unit_height)
def _get_bbl_from_y(self, y):
position = self._get_position(y)
return self.trace.get_bbl_from_position(position)
def _get_func_from_func_name(self, func_name):
return self.workspace.instance.kb.functions.function(name=func_name)
def _get_func_from_y(self, y):
position = self._get_position(y)
func_name = self.trace.get_func_name_from_position(position)
return self._get_func_from_func_name(func_name)
