1 files changed, 150 insertions, 0 deletions
diff --git a/compilerplugins/clang/unusedvarsglobal.py b/compilerplugins/clang/unusedvarsglobal.py
new file mode 100755
index 0000000000..ccb7305ccc
--- /dev/null
+++ b/compilerplugins/clang/unusedvarsglobal.py
@@ -0,0 +1,150 @@
+#!/usr/bin/python3
+
+import re
+import io
+
+definitionSet = set()
+readFromSet = set()
+writeToSet = set()
+defToTypeMap = dict()
+
+def parseFieldInfo( tokens ):
+    return (tokens[1].strip(), tokens[2].strip())
+
+with io.open("workdir/loplugin.unusedvarsglobal.log", "r", buffering=16*1024*1024) as txt:
+    for line in txt:
+        try:
+            tokens = line.strip().split("\t")
+            if tokens[0] == "definition:":
+                srcLoc = tokens[3]
+                # ignore external source code
+                if (srcLoc.startswith("external/")):
+                    continue
+                # ignore build folder
+                if (srcLoc.startswith("workdir/")):
+                    continue
+                varname = tokens[1].strip()
+                vartype = tokens[2].strip()
+                if vartype.startswith("const "):
+                    vartype = vartype[6:]
+                if vartype.startswith("class "):
+                    vartype = vartype[6:]
+                if vartype.startswith("struct "):
+                    vartype = vartype[7:]
+                if vartype.startswith("::"):
+                    vartype = vartype[2:]
+                fieldInfo = (srcLoc, varname)
+                definitionSet.add(fieldInfo)
+                defToTypeMap[fieldInfo] = vartype
+            elif tokens[0] == "read:":
+                if len(tokens) == 3:
+                    readFromSet.add(parseFieldInfo(tokens))
+            elif tokens[0] == "write:":
+                if len(tokens) == 3:
+                    writeToSet.add(parseFieldInfo(tokens))
+            else:
+                print( "unknown line: " + line)
+        except IndexError:
+            print("problem with line " + line.strip())
+            raise
+
+definitionSet2 = set()
+for d in definitionSet:
+    varname = d[1]
+    vartype = defToTypeMap[d]
+    if len(varname) == 0:
+        continue
+    if varname.startswith("autoRegister"): # auto-generated CPPUNIT stuff
+        continue
+    if vartype in ["css::uno::ContextLayer", "SolarMutexGuard", "SolarMutexReleaser", "OpenGLZone"]:
+        continue
+    if vartype in ["PreDefaultWinNoOpenGLZone", "SchedulerGuard", "SkiaZone", "OpenGLVCLContextZone"]:
+        continue
+    if vartype in ["SwXDispatchProviderInterceptor::DispatchMutexLock_Impl", "SfxObjectShellLock", "OpenCLZone"]:
+        continue
+    if vartype in ["OpenCLInitialZone", "pyuno::PyThreadDetach", "SortRefUpdateSetter", "oglcanvas::TransformationPreserver"]:
+        continue
+    if vartype in ["StackHack", "osl::MutexGuard", "accessibility::SolarMethodGuard"]:
+        continue
+    if vartype in ["osl::ClearableMutexGuard", "comphelper::OExternalLockGuard", "osl::Guard< ::osl::Mutex>"]:
+        continue
+    if vartype in ["comphelper::OContextEntryGuard", "Guard<class osl::Mutex>", "basic::LibraryContainerMethodGuard"]:
+        continue
+    if vartype in ["canvas::CanvasBase::MutexType"]:
+        continue
+    definitionSet2.add(d)
+
+# Calculate untouched
+untouchedSet = set()
+for d in definitionSet2:
+    if d in readFromSet or d in writeToSet:
+        continue
+    varname = d[1]
+    if len(varname) == 0:
+        continue
+    untouchedSet.add(d)
+
+writeonlySet = set()
+for d in definitionSet2:
+    if d in readFromSet or d in untouchedSet:
+        continue
+    varname = d[1]
+    vartype = defToTypeMap[d]
+    if "Alive" in varname:
+        continue
+    if "Keep" in varname:
+        continue
+    if vartype.endswith(" &"):
+        continue
+    writeonlySet.add(d)
+
+readonlySet = set()
+for d in definitionSet2:
+    if d in writeToSet or d in untouchedSet:
+        continue
+    varname = d[1]
+    vartype = defToTypeMap[d]
+    if "Dummy" in varname:
+        continue
+    if "Empty" in varname:
+        continue
+    if varname in ["aOldValue", "aNewValue"]:
+        continue
+    if "Exception" in vartype and vartype.endswith(" &"):
+        continue
+    if "exception" in vartype and vartype.endswith(" &"):
+        continue
+    # TODO for now, focus on the simple stuff
+    if not (vartype in ["rtl::OUString", "Bool"]):
+        continue
+    readonlySet.add(d)
+
+# sort the results using a "natural order" so sequences like [item1,item2,item10] sort nicely
+def natural_sort_key(s, _nsre=re.compile('([0-9]+)')):
+    return [int(text) if text.isdigit() else text.lower()
+            for text in re.split(_nsre, s)]
+# sort by both the source-line and the datatype, so the output file ordering is stable
+# when we have multiple items on the same source line
+def v_sort_key(v):
+    return natural_sort_key(v[0]) + [v[1]]
+
+# sort results by name and line number
+tmp1list = sorted(untouchedSet, key=lambda v: v_sort_key(v))
+tmp2list = sorted(writeonlySet, key=lambda v: v_sort_key(v))
+tmp3list = sorted(readonlySet, key=lambda v: v_sort_key(v))
+
+# print out the results
+with open("compilerplugins/clang/unusedvarsglobal.untouched.results", "wt") as f:
+    for t in tmp1list:
+        f.write( t[0] + "\n" )
+        f.write( "    " + defToTypeMap[t] + " " + t[1] + "\n" )
+with open("compilerplugins/clang/unusedvarsglobal.writeonly.results", "wt") as f:
+    for t in tmp2list:
+        f.write( t[0] + "\n" )
+        f.write( "    " + defToTypeMap[t] + " " + t[1] + "\n" )
+with open("compilerplugins/clang/unusedvarsglobal.readonly.results", "wt") as f:
+    for t in tmp3list:
+        f.write( t[0] + "\n" )
+        f.write( "    " + defToTypeMap[t] + " " + t[1] + "\n" )
+
+