[cfe-commits] r167640 - /cfe/trunk/utils/ClangDataFormat.py
Argyrios Kyrtzidis
akyrtzi at gmail.com
Fri Nov 9 14:59:02 PST 2012
Author: akirtzidis
Date: Fri Nov 9 16:59:01 2012
New Revision: 167640
URL: http://llvm.org/viewvc/llvm-project?rev=167640&view=rev
Log:
Add lldb data formatters for clang classes, starting with SourceLocation.
When installed, instead of getting this:
(lldb) p Tok.Loc
(clang::SourceLocation) $0 = {
(unsigned int) ID = 123582
}
you'll get:
(lldb) p Tok.Loc
(clang::SourceLocation) $4 = "/usr/include/i386/_types.h:37:1" (offset: 123582, file)
This depends on r167629.
Added:
cfe/trunk/utils/ClangDataFormat.py
Added: cfe/trunk/utils/ClangDataFormat.py
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/utils/ClangDataFormat.py?rev=167640&view=auto
==============================================================================
--- cfe/trunk/utils/ClangDataFormat.py (added)
+++ cfe/trunk/utils/ClangDataFormat.py Fri Nov 9 16:59:01 2012
@@ -0,0 +1,116 @@
+"""lldb data formatters for clang classes.
+
+Usage
+--
+import this file in your ~/.lldbinit by adding this line:
+
+command script import /path/to/ClangDataFormat.py
+
+After that, instead of getting this:
+
+(lldb) p Tok.Loc
+(clang::SourceLocation) $0 = {
+ (unsigned int) ID = 123582
+}
+
+you'll get:
+
+(lldb) p Tok.Loc
+(clang::SourceLocation) $4 = "/usr/include/i386/_types.h:37:1" (offset: 123582, file)
+"""
+
+import lldb
+
+def __lldb_init_module(debugger, internal_dict):
+ debugger.HandleCommand("type summary add -F ClangDataFormat.SourceLocation_summary clang::SourceLocation")
+
+def SourceLocation_summary(srcloc, internal_dict):
+ return SourceLocation(srcloc).summary()
+
+class SourceLocation(object):
+ def __init__(self, srcloc):
+ self.srcloc = srcloc
+
+ def offset(self):
+ return getValueFromExpression(self.srcloc, ".getOffset()").GetValueAsUnsigned()
+
+ def isMacro(self):
+ return getValueFromExpression(self.srcloc, ".isMacroID()").GetValueAsUnsigned()
+
+ def getPrint(self, srcmgr_path):
+ print_str = getValueFromExpression(self.srcloc, ".printToString(%s)" % srcmgr_path)
+ return print_str.GetSummary()
+
+ def summary(self):
+ desc = "(offset: %d, %s)" % (self.offset(), "macro" if self.isMacro() else "file")
+ srcmgr_path = findObjectExpressionPath("clang::SourceManager", lldb.frame)
+ if srcmgr_path:
+ desc = self.getPrint(srcmgr_path) + " " + desc
+ return desc
+
+# Key is a (function address, type name) tuple, value is the expression path for
+# an object with such a type name from inside that function.
+FramePathMapCache = {}
+
+def findSourceManager(frame):
+ return findObject("clang::SourceManager", SourceManager_Paths, frame)
+
+def findObjectExpressionPath(typename, frame):
+ func_addr = frame.GetFunction().GetStartAddress().GetFileAddress()
+ key = (func_addr, typename)
+ try:
+ return FramePathMapCache[key]
+ except KeyError:
+ #print "CACHE MISS"
+ path = None
+ obj = findObject(typename, frame)
+ if obj:
+ path = getExpressionPath(obj)
+ FramePathMapCache[key] = path
+ return path
+
+def findObject(typename, frame):
+ def getTypename(value):
+ # FIXME: lldb should provide something like getBaseType
+ ty = value.GetType()
+ if ty.IsPointerType() or ty.IsReferenceType():
+ return ty.GetPointeeType().GetName()
+ return ty.GetName()
+
+ def searchForType(value, searched):
+ tyname = getTypename(value)
+ #print "SEARCH:", getExpressionPath(value), value.GetType().GetName()
+ if tyname == typename:
+ return value
+ ty = value.GetType()
+ if not (ty.IsPointerType() or
+ ty.IsReferenceType() or
+ # FIXME: lldb should provide something like getCanonicalType
+ tyname.startswith("llvm::IntrusiveRefCntPtr<") or
+ tyname.startswith("llvm::OwningPtr<")):
+ return None
+ # FIXME: Hashing for SBTypes does not seem to work correctly, uses the typename instead,
+ # and not the canonical one unfortunately.
+ if tyname in searched:
+ return None
+ searched.add(tyname)
+ for i in range(value.GetNumChildren()):
+ child = value.GetChildAtIndex(i, 0, False)
+ found = searchForType(child, searched)
+ if found:
+ return found
+
+ searched = set()
+ value_list = frame.GetVariables(True, True, True, True)
+ for val in value_list:
+ found = searchForType(val, searched)
+ if found:
+ return found if not found.TypeIsPointerType() else found.Dereference()
+
+def getValueFromExpression(val, expr):
+ return lldb.frame.EvaluateExpression(getExpressionPath(val) + expr)
+
+def getExpressionPath(val):
+ stream = lldb.SBStream()
+ val.GetExpressionPath(stream)
+ return stream.GetData()
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