|
|
|
|
(*
|
|
|
|
|
* Copyright (c) 2013-present, Facebook, Inc.
|
|
|
|
|
*
|
|
|
|
|
* This source code is licensed under the MIT license found in the
|
|
|
|
|
* LICENSE file in the root directory of this source tree.
|
|
|
|
|
*)
|
|
|
|
|
|
|
|
|
|
open! IStd
|
|
|
|
|
|
|
|
|
|
(** This module handles C or Objective-C types for which there are special rules for memory management *)
|
|
|
|
|
|
|
|
|
|
(** This module models special c struct types from the Apple's Core Foundation libraries
|
|
|
|
|
for which there are particular rules for memory management. *)
|
|
|
|
|
|
|
|
|
|
module Core_foundation_model = struct
|
|
|
|
|
let core_foundation =
|
|
|
|
|
[ "__CFArray"
|
|
|
|
|
; "__CFAttributedString"
|
|
|
|
|
; "__CFBag"
|
|
|
|
|
; "__CFNull"
|
|
|
|
|
; "__CFAllocator"
|
|
|
|
|
; "__CFBinaryHeap"
|
|
|
|
|
; "__CFBitVector"
|
|
|
|
|
; "__CFBundle"
|
|
|
|
|
; "__CFCalendar"
|
|
|
|
|
; "__CFCharacterSet"
|
|
|
|
|
; "__CFDate"
|
|
|
|
|
; "__CFDateFormatter"
|
|
|
|
|
; "__CFDictionary"
|
|
|
|
|
; "__CFError"
|
|
|
|
|
; "__CFFileDescriptor"
|
|
|
|
|
; "__CFFileSecurity"
|
|
|
|
|
; "__CFLocale"
|
|
|
|
|
; "__CFMachPort"
|
|
|
|
|
; "__CFMessagePort"
|
|
|
|
|
; "__CFNotificationCenter"
|
|
|
|
|
; "__CFBoolean"
|
|
|
|
|
; "__CFNumber"
|
|
|
|
|
; "__CFNumberFormatter"
|
|
|
|
|
; "__CFPlugInInstance"
|
|
|
|
|
; "__CFReadStream"
|
|
|
|
|
; "__CFWriteStream"
|
|
|
|
|
; "__CFRunLoop"
|
|
|
|
|
; "__CFRunLoopSource"
|
|
|
|
|
; "__CFRunLoopObserver"
|
|
|
|
|
; "__CFRunLoopTimer"
|
|
|
|
|
; "__CFSet"
|
|
|
|
|
; "__CFStringTokenizer"
|
|
|
|
|
; "__CFSocket"
|
|
|
|
|
; "__CFReadStream"
|
|
|
|
|
; "__CFWriteStream"
|
|
|
|
|
; "__CFTimeZone"
|
|
|
|
|
; "__CFTree"
|
|
|
|
|
; "__CFURLEnumerator"
|
|
|
|
|
; "__CFUUID" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let cf_network =
|
|
|
|
|
[ "_CFHTTPAuthentication"
|
|
|
|
|
; "__CFHTTPMessage"
|
|
|
|
|
; "__CFHost"
|
|
|
|
|
; "__CFNetDiagnostic"
|
|
|
|
|
; "__CFNetService"
|
|
|
|
|
; "__CFNetServiceMonitor"
|
|
|
|
|
; "__CFNetServiceBrowser" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let core_media =
|
|
|
|
|
[ "OpaqueCMBlockBuffer"
|
|
|
|
|
; "opaqueCMBufferQueue"
|
|
|
|
|
; "opaqueCMBufferQueueTriggerToken"
|
|
|
|
|
; "opaqueCMFormatDescription"
|
|
|
|
|
; "OpaqueCMMemoryPool"
|
|
|
|
|
; "opaqueCMSampleBuffer"
|
|
|
|
|
; "opaqueCMSimpleQueue"
|
|
|
|
|
; "OpaqueCMClock"
|
|
|
|
|
; "OpaqueCMTimebase" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let core_text =
|
|
|
|
|
[ "__CTFont"
|
|
|
|
|
; "__CTFontCollection"
|
|
|
|
|
; "__CTFontDescriptor"
|
|
|
|
|
; "__CTFrame"
|
|
|
|
|
; "__CTFramesetter"
|
|
|
|
|
; "__CTGlyphInfo"
|
|
|
|
|
; "__CTLine"
|
|
|
|
|
; "__CTParagraphStyle"
|
|
|
|
|
; "__CTRubyAnnotation"
|
|
|
|
|
; "__CTRun"
|
|
|
|
|
; "__CTRunDelegate"
|
|
|
|
|
; "__CTTextTab"
|
|
|
|
|
; "__CTTypesetter" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let core_video =
|
|
|
|
|
["__CVBuffer"; "__CVMetalTextureCache"; "__CVOpenGLESTextureCache"; "__CVPixelBufferPool"]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let image_io = ["CGImageDestination"; "CGImageMetadata"; "CGImageMetadataTag"; "CGImageSource"]
|
|
|
|
|
|
|
|
|
|
let security =
|
|
|
|
|
[ "__SecCertificate"
|
|
|
|
|
; "__SecIdentity"
|
|
|
|
|
; "__SecKey"
|
|
|
|
|
; "__SecPolicy"
|
|
|
|
|
; "__SecAccessControl"
|
|
|
|
|
; "__SecRandom"
|
|
|
|
|
; "__SecCode"
|
|
|
|
|
; "__SecTrust"
|
|
|
|
|
; "__SecRequirement" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let system_configuration =
|
|
|
|
|
[ "__SCDynamicStore"
|
|
|
|
|
; "__SCNetworkInterface"
|
|
|
|
|
; "__SCBondStatus"
|
|
|
|
|
; "__SCNetworkProtocol"
|
|
|
|
|
; "__SCNetworkService"
|
|
|
|
|
; "__SCNetworkSet"
|
|
|
|
|
; "__SCNetworkConnection"
|
|
|
|
|
; "__SCNetworkReachability"
|
|
|
|
|
; "__SCPreferences" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let core_graphics_types =
|
|
|
|
|
[ "CGAffineTransform"
|
|
|
|
|
; "CGBase"
|
|
|
|
|
; "CGBitmapContext"
|
|
|
|
|
; "CGColor"
|
|
|
|
|
; "CGColorSpace"
|
|
|
|
|
; "CGContext"
|
|
|
|
|
; "CGDataConsumer"
|
|
|
|
|
; "CGDataProvider"
|
|
|
|
|
; "CGError"
|
|
|
|
|
; "CGFont"
|
|
|
|
|
; "CGFunction"
|
|
|
|
|
; "CGGeometry"
|
|
|
|
|
; "CGGradient"
|
|
|
|
|
; "CGImage"
|
|
|
|
|
; "CGLayer"
|
|
|
|
|
; "CGPath"
|
|
|
|
|
; "CGPattern"
|
|
|
|
|
; "CGPDFArray"
|
|
|
|
|
; "CGPDFContentStream"
|
|
|
|
|
; "CGPDFContext"
|
|
|
|
|
; "CGPDFDictionary"
|
|
|
|
|
; "CGPDFDocument"
|
|
|
|
|
; "CGPDFObject"
|
|
|
|
|
; "CGPDFOperatorTable"
|
|
|
|
|
; "CGPDFPage"
|
|
|
|
|
; "CGPDFScanner"
|
|
|
|
|
; "CGPDFStream"
|
|
|
|
|
; "CGPDFString"
|
|
|
|
|
; "CGShading" ]
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let core_foundation_types =
|
|
|
|
|
core_foundation @ cf_network @ core_media @ core_text @ core_video @ image_io @ security
|
|
|
|
|
@ system_configuration
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let copy = "Copy"
|
|
|
|
|
|
|
|
|
|
let create = "Create"
|
|
|
|
|
|
|
|
|
|
type core_lib = Core_foundation | Core_graphics
|
|
|
|
|
|
|
|
|
|
let core_lib_to_type_list lib =
|
|
|
|
|
match lib with
|
|
|
|
|
| Core_foundation ->
|
|
|
|
|
core_foundation_types
|
|
|
|
|
| Core_graphics ->
|
|
|
|
|
core_graphics_types
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let rec is_core_lib lib typ =
|
|
|
|
|
match typ.Typ.desc with
|
|
|
|
|
| Typ.Tptr (styp, _) ->
|
|
|
|
|
is_core_lib lib styp
|
|
|
|
|
| Typ.Tstruct name ->
|
|
|
|
|
let core_lib_types = core_lib_to_type_list lib in
|
|
|
|
|
List.mem ~equal:String.equal core_lib_types (Typ.Name.name name)
|
|
|
|
|
| _ ->
|
|
|
|
|
false
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
let is_core_foundation_type typ = is_core_lib Core_foundation typ
|
|
|
|
|
|
|
|
|
|
let is_core_graphics_type typ = is_core_lib Core_graphics typ
|
|
|
|
|
|
|
|
|
|
let is_core_lib_type typ = is_core_foundation_type typ || is_core_graphics_type typ
|
|
|
|
|
|
|
|
|
|
let is_core_lib_create typ funct =
|
|
|
|
|
is_core_lib_type typ
|
|
|
|
|
&& (String.is_substring ~substring:create funct || String.is_substring ~substring:copy funct)
|
|
|
|
|
end
|
|
|
|
|
|
|
|
|
|
let is_core_lib_type typ = Core_foundation_model.is_core_lib_type typ
|
[objc] Refactor modeling of CoreFoundation and CoreGraphics libraries
Summary:
The diff is very big but it's mostly removing code. It was inspired by the fact that we were getting Dead Store FPs because we were modeling some functions from CoreFoundation and CoreGraphics directly as alloc in the frontend, which caused the parameters of the function to be seen as dead. See the new test.
To deal with this, if we are going to skip the function, we model it as malloc instead. Given how many models we had for those "model as malloc" functions, I removed them to rely solely on the new mechanism.
The modeling of malloc and release was still based on the old retain count implementation, even though all we do here is a malloc/free kind of analysis. I also changed
that to be actually malloc/free which removed many Assert false in the tests. CFRelease is not exactly free though, and it's possible to use the variable afterwards. So used a custom free builtin that only cares about removing the Memory attribute and focuses on minimizing Memory Leaks FPs.
Otherwise we were translating CFBridgingRelease as a special cast, and this wasn't working. To simplify this as well, I removed all the code for the special cast, and just modeled CFBridgingRelease and CFAutorelease also as free_cf, to avoid Memory Leak false positives. I also treated the cast __bridge_transfer as a free_cf model. This means we stopped trying to report Memory Leaks on those objects.
The modeling of CoreGraph release functions was done in the frontend, but seemed simpler to also simplify that code and model all the relevant functions.
Reviewed By: sblackshear
Differential Revision: D6397150
fbshipit-source-id: b1dc636
7 years ago
|
|
|
|
|
|
|
|
let is_malloc_model return_type pname =
|
|
|
|
|
Core_foundation_model.is_core_lib_create return_type (Typ.Procname.to_string pname)
|
