The existing deadlock detector code uses the trace-malloc stack walking
facilities, which is problematic for a few reasons.
1. It is only available in builds with --enable-trace-malloc, which is
not in the default build configuration.
2. It tries to capture a symbolicated stack trace every time that a lock
is acquired or released, which is really slow.
This patch changes the deadlock detector to use the XPCOM stack walking
and symbolification facilities, and avoids the symbolification until the
point where we need to print out the call stack, which makes the
deadlock detector a lot faster than it currently is in trace-malloc
builds.
Bug 645263, part 0: Count sync primitive ctor/dtors. r=dbaron
Bug 645263, part 1: Migrate content/media to mozilla:: sync primitives. r=doublec
Bug 645263, part 2: Migrate modules/plugin to mozilla:: sync primitives. sr=bsmedberg
Bug 645263, part 3: Migrate nsComponentManagerImpl to mozilla:: sync primitives. sr=bsmedberg
Bug 645263, part 4: Migrate everything else to mozilla:: sync primitives. r=dbaron
Bug 645263, part 5: Remove nsAutoLock.*. sr=bsmedberg
Bug 645263, part 6: Make editor test be nicer to deadlock detector. r=ehsan
Bug 645263, part 7: Disable tracemalloc backtraces for xpcshell tests. r=dbaron
Bug 646259: Fix nsCacheService to use a CondVar for notifying. r=cjones
Bug 645263, part 0: Count sync primitive ctor/dtors. r=dbaron
Bug 645263, part 1: Migrate content/media to mozilla:: sync primitives. r=doublec
Bug 645263, part 2: Migrate modules/plugin to mozilla:: sync primitives. sr=bsmedberg
Bug 645263, part 3: Migrate nsComponentManagerImpl to mozilla:: sync primitives. sr=bsmedberg
Bug 645263, part 4: Migrate everything else to mozilla:: sync primitives. r=dbaron
Bug 645263, part 5: Remove nsAutoLock.*. sr=bsmedberg
Bug 645263, part 6: Make editor test be nicer to deadlock detector. r=ehsan
Bug 645263, part 7: Disable tracemalloc backtraces for xpcshell tests. r=dbaron
Bug 646259: Fix nsCacheService to use a CondVar for notifying. r=cjones