зеркало из https://github.com/github/ruby.git
342 строки
16 KiB
Python
Executable File
342 строки
16 KiB
Python
Executable File
#!/usr/bin/env python
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#coding: utf-8
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#
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# Usage: run `command script import -r misc/lldb_cruby.py` on LLDB
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#
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# Test: misc/test_lldb_cruby.rb
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#
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from __future__ import print_function
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import lldb
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import os
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import shlex
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HEAP_PAGE_ALIGN_LOG = 14
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HEAP_PAGE_ALIGN_MASK = (~(~0 << HEAP_PAGE_ALIGN_LOG))
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def lldb_init(debugger):
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target = debugger.GetSelectedTarget()
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global SIZEOF_VALUE
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SIZEOF_VALUE = target.FindFirstType("VALUE").GetByteSize()
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value_types = []
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g = globals()
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for enum in target.FindFirstGlobalVariable('ruby_dummy_gdb_enums'):
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enum = enum.GetType()
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members = enum.GetEnumMembers()
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for i in range(0, members.GetSize()):
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member = members.GetTypeEnumMemberAtIndex(i)
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name = member.GetName()
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value = member.GetValueAsUnsigned()
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g[name] = value
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if name.startswith('RUBY_T_'):
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value_types.append(name)
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g['value_types'] = value_types
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def string2cstr(rstring):
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"""Returns the pointer to the C-string in the given String object"""
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if rstring.TypeIsPointerType():
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rstring = rstring.Dereference()
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flags = rstring.GetValueForExpressionPath(".basic->flags").unsigned
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if flags & RUBY_T_MASK != RUBY_T_STRING:
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raise TypeError("not a string")
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if flags & RUBY_FL_USER1:
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cptr = int(rstring.GetValueForExpressionPath(".as.heap.ptr").value, 0)
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clen = int(rstring.GetValueForExpressionPath(".as.heap.len").value, 0)
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else:
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cptr = int(rstring.GetValueForExpressionPath(".as.ary").location, 0)
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clen = (flags & RSTRING_EMBED_LEN_MASK) >> RSTRING_EMBED_LEN_SHIFT
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return cptr, clen
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def output_string(debugger, result, rstring):
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cptr, clen = string2cstr(rstring)
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expr = "print *(const char (*)[%d])%0#x" % (clen, cptr)
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append_command_output(debugger, expr, result)
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def fixnum_p(x):
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return x & RUBY_FIXNUM_FLAG != 0
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def flonum_p(x):
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return (x&RUBY_FLONUM_MASK) == RUBY_FLONUM_FLAG
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def static_sym_p(x):
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return (x&~(~0<<RUBY_SPECIAL_SHIFT)) == RUBY_SYMBOL_FLAG
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def append_command_output(debugger, command, result):
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output1 = result.GetOutput()
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debugger.GetCommandInterpreter().HandleCommand(command, result)
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output2 = result.GetOutput()
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result.Clear()
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result.write(output1)
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result.write(output2)
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def lldb_rp(debugger, command, result, internal_dict):
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if not ('RUBY_Qfalse' in globals()):
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lldb_init(debugger)
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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if frame.IsValid():
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val = frame.EvaluateExpression(command)
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else:
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val = target.EvaluateExpression(command)
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error = val.GetError()
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if error.Fail():
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print(error, file=result)
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return
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lldb_inspect(debugger, target, result, val)
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def lldb_inspect(debugger, target, result, val):
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num = val.GetValueAsSigned()
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if num == RUBY_Qfalse:
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print('false', file=result)
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elif num == RUBY_Qtrue:
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print('true', file=result)
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elif num == RUBY_Qnil:
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print('nil', file=result)
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elif num == RUBY_Qundef:
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print('undef', file=result)
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elif fixnum_p(num):
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print(num >> 1, file=result)
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elif flonum_p(num):
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append_command_output(debugger, "print rb_float_value(%0#x)" % val.GetValueAsUnsigned(), result)
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elif static_sym_p(num):
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if num < 128:
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print("T_SYMBOL: %c" % num, file=result)
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else:
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print("T_SYMBOL: (%x)" % num, file=result)
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append_command_output(debugger, "p rb_id2name(%0#x)" % (num >> 8), result)
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elif num & RUBY_IMMEDIATE_MASK:
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print('immediate(%x)' % num, file=result)
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else:
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tRBasic = target.FindFirstType("struct RBasic").GetPointerType()
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val = val.Cast(tRBasic)
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flags = val.GetValueForExpressionPath("->flags").GetValueAsUnsigned()
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flaginfo = ""
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if (flags & RUBY_FL_PROMOTED) == RUBY_FL_PROMOTED:
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flaginfo += "[PROMOTED] "
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if (flags & RUBY_FL_FREEZE) == RUBY_FL_FREEZE:
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flaginfo += "[FROZEN] "
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flType = flags & RUBY_T_MASK
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if flType == RUBY_T_NONE:
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print('T_NONE: %s%s' % (flaginfo, val.Dereference()), file=result)
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elif flType == RUBY_T_NIL:
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print('T_NIL: %s%s' % (flaginfo, val.Dereference()), file=result)
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elif flType == RUBY_T_OBJECT:
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result.write('T_OBJECT: %s' % flaginfo)
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append_command_output(debugger, "print *(struct RObject*)%0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_CLASS or flType == RUBY_T_MODULE or flType == RUBY_T_ICLASS:
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result.write('T_%s: %s' % ('CLASS' if flType == RUBY_T_CLASS else 'MODULE' if flType == RUBY_T_MODULE else 'ICLASS', flaginfo))
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append_command_output(debugger, "print *(struct RClass*)%0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_STRING:
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result.write('T_STRING: %s' % flaginfo)
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tRString = target.FindFirstType("struct RString").GetPointerType()
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ptr, len = string2cstr(val.Cast(tRString))
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if len == 0:
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result.write("(empty)\n")
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else:
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append_command_output(debugger, "print *(const char (*)[%d])%0#x" % (len, ptr), result)
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elif flType == RUBY_T_SYMBOL:
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result.write('T_SYMBOL: %s' % flaginfo)
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tRSymbol = target.FindFirstType("struct RSymbol").GetPointerType()
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val = val.Cast(tRSymbol)
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append_command_output(debugger, 'print (ID)%0#x ' % val.GetValueForExpressionPath("->id").GetValueAsUnsigned(), result)
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tRString = target.FindFirstType("struct RString").GetPointerType()
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output_string(debugger, result, val.GetValueForExpressionPath("->fstr").Cast(tRString))
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elif flType == RUBY_T_ARRAY:
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tRArray = target.FindFirstType("struct RArray").GetPointerType()
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val = val.Cast(tRArray)
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if flags & RUBY_FL_USER1:
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len = ((flags & (RUBY_FL_USER3|RUBY_FL_USER4)) >> (RUBY_FL_USHIFT+3))
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ptr = val.GetValueForExpressionPath("->as.ary")
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else:
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len = val.GetValueForExpressionPath("->as.heap.len").GetValueAsSigned()
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ptr = val.GetValueForExpressionPath("->as.heap.ptr")
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#print(val.GetValueForExpressionPath("->as.heap"), file=result)
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result.write("T_ARRAY: %slen=%d" % (flaginfo, len))
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if flags & RUBY_FL_USER1:
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result.write(" (embed)")
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elif flags & RUBY_FL_USER2:
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shared = val.GetValueForExpressionPath("->as.heap.aux.shared").GetValueAsUnsigned()
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result.write(" (shared) shared=%016x" % shared)
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else:
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capa = val.GetValueForExpressionPath("->as.heap.aux.capa").GetValueAsSigned()
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result.write(" (ownership) capa=%d" % capa)
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if len == 0:
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result.write(" {(empty)}\n")
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else:
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result.write("\n")
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if ptr.GetValueAsSigned() == 0:
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append_command_output(debugger, "expression -fx -- ((struct RArray*)%0#x)->as.ary" % val.GetValueAsUnsigned(), result)
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else:
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append_command_output(debugger, "expression -Z %d -fx -- (const VALUE*)%0#x" % (len, ptr.GetValueAsUnsigned()), result)
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elif flType == RUBY_T_HASH:
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result.write("T_HASH: %s" % flaginfo)
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append_command_output(debugger, "p *(struct RHash *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_BIGNUM:
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tRBignum = target.FindFirstType("struct RBignum").GetPointerType()
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val = val.Cast(tRBignum)
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sign = '+' if (flags & RUBY_FL_USER1) != 0 else '-'
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if flags & RUBY_FL_USER2:
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len = ((flags & (RUBY_FL_USER3|RUBY_FL_USER4|RUBY_FL_USER5)) >> (RUBY_FL_USHIFT+3))
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print("T_BIGNUM: sign=%s len=%d (embed)" % (sign, len), file=result)
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append_command_output(debugger, "print ((struct RBignum *) %0#x)->as.ary" % val.GetValueAsUnsigned(), result)
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else:
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len = val.GetValueForExpressionPath("->as.heap.len").GetValueAsSigned()
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print("T_BIGNUM: sign=%s len=%d" % (sign, len), file=result)
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print(val.Dereference(), file=result)
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append_command_output(debugger, "expression -Z %x -fx -- (const BDIGIT*)((struct RBignum*)%d)->as.heap.digits" % (len, val.GetValueAsUnsigned()), result)
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# append_command_output(debugger, "x ((struct RBignum *) %0#x)->as.heap.digits / %d" % (val.GetValueAsUnsigned(), len), result)
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elif flType == RUBY_T_FLOAT:
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tRFloat = target.FindFirstType("struct RFloat").GetPointerType()
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val = val.Cast(tRFloat)
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append_command_output(debugger, "p *(double *)%0#x" % val.GetValueForExpressionPath("->float_value").GetAddress(), result)
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elif flType == RUBY_T_RATIONAL:
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tRRational = target.FindFirstType("struct RRational").GetPointerType()
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val = val.Cast(tRRational)
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lldb_inspect(debugger, target, result, val.GetValueForExpressionPath("->num"))
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output = result.GetOutput()
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result.Clear()
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result.write("(Rational) " + output.rstrip() + " / ")
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lldb_inspect(debugger, target, result, val.GetValueForExpressionPath("->den"))
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elif flType == RUBY_T_COMPLEX:
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tRComplex = target.FindFirstType("struct RComplex").GetPointerType()
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val = val.Cast(tRComplex)
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lldb_inspect(debugger, target, result, val.GetValueForExpressionPath("->real"))
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real = result.GetOutput().rstrip()
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result.Clear()
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lldb_inspect(debugger, target, result, val.GetValueForExpressionPath("->imag"))
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imag = result.GetOutput().rstrip()
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result.Clear()
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if not imag.startswith("-"):
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imag = "+" + imag
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print("(Complex) " + real + imag + "i", file=result)
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elif flType == RUBY_T_REGEXP:
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tRRegex = target.FindFirstType("struct RRegexp").GetPointerType()
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val = val.Cast(tRRegex)
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print("(Regex) ->src {", file=result)
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lldb_inspect(debugger, target, result, val.GetValueForExpressionPath("->src"))
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print("}", file=result)
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elif flType == RUBY_T_DATA:
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tRTypedData = target.FindFirstType("struct RTypedData").GetPointerType()
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val = val.Cast(tRTypedData)
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flag = val.GetValueForExpressionPath("->typed_flag")
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if flag.GetValueAsUnsigned() == 1:
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print("T_DATA: %s" % val.GetValueForExpressionPath("->type->wrap_struct_name"), file=result)
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append_command_output(debugger, "p *(struct RTypedData *) %0#x" % val.GetValueAsUnsigned(), result)
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else:
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print("T_DATA:", file=result)
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append_command_output(debugger, "p *(struct RData *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_NODE:
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tRTypedData = target.FindFirstType("struct RNode").GetPointerType()
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nd_type = (flags & RUBY_NODE_TYPEMASK) >> RUBY_NODE_TYPESHIFT
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append_command_output(debugger, "p (node_type) %d" % nd_type, result)
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val = val.Cast(tRTypedData)
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append_command_output(debugger, "p *(struct RNode *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_MOVED:
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tRTypedData = target.FindFirstType("struct RMoved").GetPointerType()
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val = val.Cast(tRTypedData)
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append_command_output(debugger, "p *(struct RMoved *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_MATCH:
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tRTypedData = target.FindFirstType("struct RMatch").GetPointerType()
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val = val.Cast(tRTypedData)
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append_command_output(debugger, "p *(struct RMatch *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_IMEMO:
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# I'm not sure how to get IMEMO_MASK out of lldb. It's not in globals()
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imemo_type = (flags >> RUBY_FL_USHIFT) & 0x0F # IMEMO_MASK
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print("T_IMEMO: ", file=result)
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append_command_output(debugger, "p (enum imemo_type) %d" % imemo_type, result)
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append_command_output(debugger, "p *(struct MEMO *) %0#x" % val.GetValueAsUnsigned(), result)
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elif flType == RUBY_T_ZOMBIE:
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tRZombie = target.FindFirstType("struct RZombie").GetPointerType()
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val = val.Cast(tRZombie)
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append_command_output(debugger, "p *(struct RZombie *) %0#x" % val.GetValueAsUnsigned(), result)
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else:
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print("Not-handled type %0#x" % flType, file=result)
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print(val, file=result)
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def count_objects(debugger, command, ctx, result, internal_dict):
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objspace = ctx.frame.EvaluateExpression("ruby_current_vm->objspace")
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num_pages = objspace.GetValueForExpressionPath(".heap_pages.allocated_pages").unsigned
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counts = {}
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total = 0
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for t in range(0x00, RUBY_T_MASK+1):
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counts[t] = 0
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for i in range(0, num_pages):
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print("\rcounting... %d/%d" % (i, num_pages), end="")
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page = objspace.GetValueForExpressionPath('.heap_pages.sorted[%d]' % i)
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p = page.GetChildMemberWithName('start')
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num_slots = page.GetChildMemberWithName('total_slots').unsigned
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for j in range(0, num_slots):
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obj = p.GetValueForExpressionPath('[%d]' % j)
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flags = obj.GetValueForExpressionPath('.as.basic.flags').unsigned
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obj_type = flags & RUBY_T_MASK
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counts[obj_type] += 1
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total += num_slots
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print("\rTOTAL: %d, FREE: %d" % (total, counts[0x00]))
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for sym in value_types:
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print("%s: %d" % (sym, counts[globals()[sym]]))
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def stack_dump_raw(debugger, command, ctx, result, internal_dict):
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ctx.frame.EvaluateExpression("rb_vmdebug_stack_dump_raw_current()")
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def heap_page(debugger, command, ctx, result, internal_dict):
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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val = frame.EvaluateExpression(command)
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page = get_page(lldb, target, val)
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page_type = target.FindFirstType("struct heap_page").GetPointerType()
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page.Cast(page_type)
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append_command_output(debugger, "p (struct heap_page *) %0#x" % page.GetValueAsUnsigned(), result)
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append_command_output(debugger, "p *(struct heap_page *) %0#x" % page.GetValueAsUnsigned(), result)
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def heap_page_body(debugger, command, ctx, result, internal_dict):
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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val = frame.EvaluateExpression(command)
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page = get_page_body(lldb, target, val)
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print("Page body address: ", page.GetAddress(), file=result)
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print(page, file=result)
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def get_page_body(lldb, target, val):
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tHeapPageBody = target.FindFirstType("struct heap_page_body")
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addr = val.GetValueAsUnsigned()
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page_addr = addr & ~(HEAP_PAGE_ALIGN_MASK)
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address = lldb.SBAddress(page_addr, target)
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return target.CreateValueFromAddress("page", address, tHeapPageBody)
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def get_page(lldb, target, val):
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body = get_page_body(lldb, target, val)
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return body.GetValueForExpressionPath("->header.page")
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def dump_node(debugger, command, ctx, result, internal_dict):
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args = shlex.split(command)
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if not args:
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return
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node = args[0]
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dump = ctx.frame.EvaluateExpression("(struct RString*)rb_parser_dump_tree((NODE*)(%s), 0)" % node)
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output_string(ctx, result, dump)
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def __lldb_init_module(debugger, internal_dict):
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debugger.HandleCommand("command script add -f lldb_cruby.lldb_rp rp")
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debugger.HandleCommand("command script add -f lldb_cruby.count_objects rb_count_objects")
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debugger.HandleCommand("command script add -f lldb_cruby.stack_dump_raw SDR")
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debugger.HandleCommand("command script add -f lldb_cruby.dump_node dump_node")
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debugger.HandleCommand("command script add -f lldb_cruby.heap_page heap_page")
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debugger.HandleCommand("command script add -f lldb_cruby.heap_page_body heap_page_body")
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lldb_init(debugger)
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print("lldb scripts for ruby has been installed.")
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