Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 221 insertions, 0 deletions

diff --git a/python/lldbutils/README.txt b/python/lldbutils/README.txt
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+lldb debugging functionality for Gecko
+======================================
+
+This directory contains a module, lldbutils, which is imported by the
+in-tree .lldbinit file.  The lldbutil modules define some lldb commands
+that are handy for debugging Gecko.
+
+If you want to add a new command or Python-implemented type summary, either add
+it to one of the existing broad area Python files (such as lldbutils/layout.py
+for layout-related commands) or create a new file if none of the existing files
+is appropriate.  If you add a new file, make sure you add it to __all__ in
+lldbutils/__init__.py.
+
+
+Supported commands
+------------------
+
+Most commands below that can take a pointer to an object also support being
+called with a smart pointer like nsRefPtr or nsCOMPtr.
+
+
+* frametree EXPR, ft EXPR
+  frametreelimited EXPR, ftl EXPR
+
+  Shows information about a frame tree.  EXPR is an expression that
+  is evaluated, and must be an nsIFrame*.  frametree displays the
+  entire frame tree that contains the given frame.  frametreelimited
+  displays a subtree of the frame tree rooted at the given frame.
+
+  (lldb) p this
+  (nsBlockFrame *) $4 = 0x000000011687fcb8
+  (lldb) ftl this
+  Block(div)(-1)@0x11687fcb8 {0,0,7380,690} [state=0002100000d04601] [content=0x11688c0c0] [sc=0x11687f990:-moz-scrolled-content]<
+    line 0x116899130: count=1 state=inline,clean,prevmarginclean,not impacted,not wrapped,before:nobr,after:nobr[0x100] {60,0,0,690} ink-overflow=60,510,0,0 scr-overflow=60,510,0,0 <
+      Text(0)""@0x1168990c0 {60,510,0,0} [state=0001000020404000] [content=0x11687ca10] [sc=0x11687fd88:-moz-non-element,parent=0x11687eb00] [run=0x115115e80][0,0,T]
+    >
+  >
+  (lldb) ft this
+  Viewport(-1)@0x116017430 [view=0x115efe190] {0,0,60,60} [state=000b063000002623] [sc=0x1160170f8:-moz-viewport]<
+    HTMLScroll(html)(-1)@0x1160180d0 {0,0,0,0} [state=000b020000000403] [content=0x115e4d640] [sc=0x116017768:-moz-viewport-scroll]<
+      ...
+      Canvas(html)(-1)@0x116017e08 {0,0,60,60} ink-overflow=0,0,8340,2196 scr-overflow=0,0,8220,2196 [state=000b002000000601] [content=0x115e4d640] [sc=0x11687e0f8:-moz-scrolled-canvas]<
+        Block(html)(-1)@0x11687e578 {0,0,60,2196} ink-overflow=0,0,8340,2196 scr-overflow=0,0,8220,2196 [state=000b100000d00601] [content=0x115e4d640] [sc=0x11687e4b8,parent=0x0]<
+          line 0x11687ec48: count=1 state=block,clean,prevmarginclean,not impacted,not wrapped,before:nobr,after:nobr[0x48] bm=480 {480,480,0,1236} ink-overflow=360,426,7980,1410 scr-overflow=480,480,7740,1236 <
+            Block(body)(1)@0x11687ebb0 {480,480,0,1236} ink-overflow=-120,-54,7980,1410 scr-overflow=0,0,7740,1236 [state=000b120000100601] [content=0x115ed8980] [sc=0x11687e990]<
+              line 0x116899170: count=1 state=inline,clean,prevmarginclean,not impacted,not wrapped,before:nobr,after:nobr[0x0] {0,0,7740,1236} ink-overflow=-120,-54,7980,1410 scr-overflow=0,0,7740,1236 <
+                nsTextControlFrame@0x11687f068 {0,66,7740,1170} ink-overflow=-120,-120,7980,1410 scr-overflow=0,0,7740,1170 [state=0002000000004621] [content=0x115ca2c50] [sc=0x11687ea40]<
+                  HTMLScroll(div)(-1)@0x11687f6b0 {180,240,7380,690} [state=0002000000084409] [content=0x11688c0c0] [sc=0x11687eb00]<
+                    Block(div)(-1)@0x11687fcb8 {0,0,7380,690} [state=0002100000d04601] [content=0x11688c0c0] [sc=0x11687f990:-moz-scrolled-content]<
+                      line 0x116899130: count=1 state=inline,clean,prevmarginclean,not impacted,not wrapped,before:nobr,after:nobr[0x100] {60,0,0,690} ink-overflow=60,510,0,0 scr-overflow=60,510,0,0 <
+                        Text(0)""@0x1168990c0 {60,510,0,0} [state=0001000020404000] [content=0x11687ca10] [sc=0x11687fd88:-moz-non-element,parent=0x11687eb00] [run=0x115115e80][0,0,T]
+ ...
+
+
+* js
+
+  Dumps the current JS stack.
+
+  (lldb) js
+  0 anonymous(aForce = false) ["chrome://browser/content/browser.js":13414]
+      this = [object Object]
+  1 updateAppearance() ["chrome://browser/content/browser.js":13326]
+      this = [object Object]
+  2 handleEvent(aEvent = [object Event]) ["chrome://browser/content/tabbrowser.xml":3811]
+      this = [object XULElement]
+
+
+* prefcnt EXPR
+
+  Shows the refcount of a given object.  EXPR is an expression that is
+  evaluated, and can be either a pointer to or an actual refcounted
+  object.  The object can be a standard nsISupports-like refcounted
+  object, a cycle-collected object or a mozilla::RefCounted<T> object.
+
+  (lldb) p this
+  (nsHTMLDocument *) $1 = 0x0000000116e9d800
+  (lldb) prefcnt this
+  20
+  (lldb) p mDocumentURI
+  (nsCOMPtr<nsIURI>) $3 = {
+    mRawPtr = 0x0000000117163e50
+  }
+  (lldb) prefcnt mDocumentURI
+  11
+
+
+* pstate EXPR
+
+  Shows the frame state bits (using their symbolic names) of a given frame.
+  EXPR is an expression that is evaluated, and must be an nsIFrame*.
+
+  (lldb) p this
+  (nsTextFrame *) $1 = 0x000000011f470b10
+  (lldb) p/x mState
+  (nsFrameState) $2 = 0x0000004080604000
+  (lldb) pstate this
+  TEXT_HAS_NONCOLLAPSED_CHARACTERS | TEXT_END_OF_LINE | TEXT_START_OF_LINE | NS_FRAME_PAINTED_THEBES | NS_FRAME_INDEPENDENT_SELECTION
+
+
+* ptag EXPR
+
+  Shows the DOM tag name of a node.  EXPR is an expression that is
+  evaluated, and can be either an nsINode pointer or a concrete DOM
+  object.
+
+  (lldb) p this
+  (nsHTMLDocument *) $0 = 0x0000000116e9d800
+  (lldb) ptag this
+  (PermanentAtomImpl *) $1 = 0x0000000110133ac0 u"#document"
+  (lldb) p this->GetRootElement()
+  (mozilla::dom::HTMLSharedElement *) $2 = 0x0000000118429780
+  (lldb) ptag $2
+  (PermanentAtomImpl *) $3 = 0x0000000110123b80 u"html"
+
+
+Supported type summaries and synthetic children
+-----------------------------------------------
+
+In lldb terminology, type summaries are rules for how to display a value
+when using the "expression" command (or its familiar-to-gdb-users "p" alias),
+and synthetic children are fake member variables or array elements also
+added by custom rules.
+
+For objects that do have synthetic children defined for them, like nsTArray,
+the "expr -R -- EXPR" command can be used to show its actual member variables.
+
+
+* nsAString, nsACString,
+  nsFixedString, nsFixedCString,
+  nsAutoString, nsAutoCString
+
+  Strings have a type summary that shows the actual string.
+
+  (lldb) frame info
+  frame #0: 0x000000010400cfea XUL`nsCSSParser::ParseProperty(this=0x00007fff5fbf5248, aPropID=eCSSProperty_margin_top, aPropValue=0x00007fff5fbf53f8, aSheetURI=0x0000000115ae8c00, aBaseURI=0x0000000115ae8c00, aSheetPrincipal=0x000000010ff9e040, aDeclaration=0x00000001826fd580, aChanged=0x00007fff5fbf5247, aIsImportant=false, aIsSVGMode=false) + 74 at nsCSSParser.cpp:12851
+  (lldb) p aPropValue
+  (const nsAString) $16 = u"-25px"
+
+  (lldb) p this
+  (nsHTMLDocument *) $18 = 0x0000000115b56000
+  (lldb) p mContentType
+  (nsCString) $19 = {
+    nsACString = "text/html"
+  }
+
+* nscolor
+
+  nscolors (32-bit RGBA colors) have a type summary that shows the color as
+  one of the CSS 2.1 color keywords, a six digit hex color, an rgba() color,
+  or the "transparent" keyword.
+
+  (lldb) p this
+  (nsTextFrame *) $0 = 0x00000001168245e0
+  (lldb) p *this->StyleColor()
+  (const nsStyleColor) $1 = {
+    mColor = lime
+  }
+  (lldb) expr -R -- *this->StyleColor()
+  (const nsStyleColor) $2 = {
+    mColor = 4278255360
+  }
+
+* nsIAtom
+
+  Atoms have a type summary that shows the string value inside the atom.
+
+  (lldb) frame info
+  frame #0: 0x00000001028b8c49 XUL`mozilla::dom::Element::GetBoolAttr(this=0x0000000115ca1c50, aAttr=0x000000011012a640) const + 25 at Element.h:907
+  (lldb) p aAttr
+  (PermanentAtomImpl *) $1 = 0x000000011012a640 u"readonly"
+
+* nsTArray and friends
+
+  nsTArrays and their auto and fallible varieties have synthetic children
+  for their elements.  This means when displaying them with "expr" (or "p"),
+  they will be shown like regular arrays, rather than showing the mHdr and
+  other fields.
+
+  (lldb) frame info
+  frame #0: 0x00000001043eb8a8 XUL`SVGTextFrame::DoGlyphPositioning(this=0x000000012f3f8778) + 248 at SVGTextFrame.cpp:4940
+  (lldb) p charPositions
+  (nsTArray<nsPoint>) $5 = {
+    [0] = {
+      mozilla::gfx::BasePoint<int, nsPoint> = {
+        x = 0
+        y = 816
+      }
+    }
+    [1] = {
+      mozilla::gfx::BasePoint<int, nsPoint> = {
+        x = 426
+        y = 816
+      }
+    }
+    [2] = {
+      mozilla::gfx::BasePoint<int, nsPoint> = {
+        x = 906
+        y = 816
+      }
+    }
+  }
+  (lldb) expr -R -- charPositions
+  (nsTArray<nsPoint>) $4 = {
+    nsTArray_Impl<nsPoint, nsTArrayInfallibleAllocator> = {
+      nsTArray_base<nsTArrayInfallibleAllocator, nsTArray_CopyWithMemutils> = {
+        mHdr = 0x000000012f3f1b80
+      }
+    }
+  }
+
+* nsTextNode, nsTextFragment
+
+  Text nodes have a type summary that shows the nsTextFragment in the
+  nsTextNode, which itself has a type summary that shows the text
+  content.
+
+  (lldb) p this
+  (nsTextFrame *) $14 = 0x000000011811bb10
+  (lldb) p mContent
+  (nsTextNode *) $15 = 0x0000000118130110 "Search or enter address"
+