forked from OSchip/llvm-project
239 lines
8.2 KiB
Python
239 lines
8.2 KiB
Python
##===-- sourcewin.py -----------------------------------------*- Python -*-===##
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##
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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##
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##===----------------------------------------------------------------------===##
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import cui
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import curses
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import lldb
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import lldbutil
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import re
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import os
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class SourceWin(cui.TitledWin):
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def __init__(self, driver, x, y, w, h):
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super(SourceWin, self).__init__(x, y, w, h, "Source")
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self.sourceman = driver.getSourceManager()
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self.sources = {}
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self.filename = None
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self.pc_line = None
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self.viewline = 0
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self.breakpoints = {}
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self.win.scrollok(1)
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self.markerPC = ":) "
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self.markerBP = "B> "
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self.markerNone = " "
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try:
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from pygments.formatters import TerminalFormatter
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self.formatter = TerminalFormatter()
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except ImportError:
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#self.win.addstr("\nWarning: no 'pygments' library found. Syntax highlighting is disabled.")
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self.lexer = None
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self.formatter = None
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pass
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# FIXME: syntax highlight broken
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self.formatter = None
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self.lexer = None
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def handleEvent(self, event):
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if isinstance(event, int):
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self.handleKey(event)
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return
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if isinstance(event, lldb.SBEvent):
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if lldb.SBBreakpoint.EventIsBreakpointEvent(event):
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self.handleBPEvent(event)
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if lldb.SBProcess.EventIsProcessEvent(event) and \
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not lldb.SBProcess.GetRestartedFromEvent(event):
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process = lldb.SBProcess.GetProcessFromEvent(event)
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if not process.IsValid():
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return
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if process.GetState() == lldb.eStateStopped:
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self.refreshSource(process)
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elif process.GetState() == lldb.eStateExited:
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self.notifyExited(process)
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def notifyExited(self, process):
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self.win.erase()
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target = lldbutil.get_description(process.GetTarget())
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pid = process.GetProcessID()
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ec = process.GetExitStatus()
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self.win.addstr(
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"\nProcess %s [%d] has exited with exit-code %d" %
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(target, pid, ec))
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def pageUp(self):
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if self.viewline > 0:
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self.viewline = self.viewline - 1
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self.refreshSource()
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def pageDown(self):
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if self.viewline < len(self.content) - self.height + 1:
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self.viewline = self.viewline + 1
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self.refreshSource()
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pass
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def handleKey(self, key):
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if key == curses.KEY_DOWN:
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self.pageDown()
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elif key == curses.KEY_UP:
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self.pageUp()
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def updateViewline(self):
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half = self.height / 2
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if self.pc_line < half:
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self.viewline = 0
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else:
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self.viewline = self.pc_line - half + 1
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if self.viewline < 0:
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raise Exception(
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"negative viewline: pc=%d viewline=%d" %
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(self.pc_line, self.viewline))
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def refreshSource(self, process=None):
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(self.height, self.width) = self.win.getmaxyx()
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if process is not None:
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loc = process.GetSelectedThread().GetSelectedFrame().GetLineEntry()
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f = loc.GetFileSpec()
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self.pc_line = loc.GetLine()
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if not f.IsValid():
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self.win.addstr(0, 0, "Invalid source file")
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return
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self.filename = f.GetFilename()
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path = os.path.join(f.GetDirectory(), self.filename)
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self.setTitle(path)
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self.content = self.getContent(path)
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self.updateViewline()
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if self.filename is None:
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return
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if self.formatter is not None:
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from pygments.lexers import get_lexer_for_filename
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self.lexer = get_lexer_for_filename(self.filename)
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bps = [] if not self.filename in self.breakpoints else self.breakpoints[self.filename]
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self.win.erase()
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if self.content:
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self.formatContent(self.content, self.pc_line, bps)
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def getContent(self, path):
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content = []
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if path in self.sources:
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content = self.sources[path]
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else:
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if os.path.exists(path):
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with open(path) as x:
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content = x.readlines()
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self.sources[path] = content
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return content
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def formatContent(self, content, pc_line, breakpoints):
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source = ""
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count = 1
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self.win.erase()
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end = min(len(content), self.viewline + self.height)
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for i in range(self.viewline, end):
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line_num = i + 1
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marker = self.markerNone
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attr = curses.A_NORMAL
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if line_num == pc_line:
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attr = curses.A_REVERSE
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if line_num in breakpoints:
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marker = self.markerBP
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line = "%s%3d %s" % (marker, line_num, self.highlight(content[i]))
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if len(line) >= self.width:
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line = line[0:self.width - 1] + "\n"
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self.win.addstr(line, attr)
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source += line
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count = count + 1
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return source
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def highlight(self, source):
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if self.lexer and self.formatter:
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from pygments import highlight
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return highlight(source, self.lexer, self.formatter)
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else:
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return source
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def addBPLocations(self, locations):
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for path in locations:
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lines = locations[path]
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if path in self.breakpoints:
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self.breakpoints[path].update(lines)
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else:
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self.breakpoints[path] = lines
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def removeBPLocations(self, locations):
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for path in locations:
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lines = locations[path]
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if path in self.breakpoints:
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self.breakpoints[path].difference_update(lines)
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else:
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raise "Removing locations that were never added...no good"
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def handleBPEvent(self, event):
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def getLocations(event):
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locs = {}
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bp = lldb.SBBreakpoint.GetBreakpointFromEvent(event)
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if bp.IsInternal():
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# don't show anything for internal breakpoints
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return
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for location in bp:
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# hack! getting the LineEntry via SBBreakpointLocation.GetAddress.GetLineEntry does not work good for
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# inlined frames, so we get the description (which does take
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# into account inlined functions) and parse it.
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desc = lldbutil.get_description(
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location, lldb.eDescriptionLevelFull)
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match = re.search('at\ ([^:]+):([\d]+)', desc)
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try:
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path = match.group(1)
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line = int(match.group(2).strip())
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except ValueError as e:
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# bp loc unparsable
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continue
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if path in locs:
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locs[path].add(line)
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else:
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locs[path] = set([line])
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return locs
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event_type = lldb.SBBreakpoint.GetBreakpointEventTypeFromEvent(event)
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if event_type == lldb.eBreakpointEventTypeEnabled \
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or event_type == lldb.eBreakpointEventTypeAdded \
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or event_type == lldb.eBreakpointEventTypeLocationsResolved \
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or event_type == lldb.eBreakpointEventTypeLocationsAdded:
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self.addBPLocations(getLocations(event))
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elif event_type == lldb.eBreakpointEventTypeRemoved \
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or event_type == lldb.eBreakpointEventTypeLocationsRemoved \
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or event_type == lldb.eBreakpointEventTypeDisabled:
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self.removeBPLocations(getLocations(event))
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elif event_type == lldb.eBreakpointEventTypeCommandChanged \
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or event_type == lldb.eBreakpointEventTypeConditionChanged \
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or event_type == lldb.eBreakpointEventTypeIgnoreChanged \
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or event_type == lldb.eBreakpointEventTypeThreadChanged \
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or event_type == lldb.eBreakpointEventTypeInvalidType:
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# no-op
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pass
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self.refreshSource()
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