Per the sync/atomic bug note:
> On ARM, x86-32, and 32-bit MIPS, it is the caller's
> responsibility to arrange for 64-bit alignment of 64-bit words
> accessed atomically. The first word in a variable or in an
> allocated struct, array, or slice can be relied upon to be
> 64-bit aligned.
All atomic accesses of 64-bit variables in syncthing code base are
currently ok (i.e they are all 64-bit aligned).
Generally, the bug is triggered because of incorrect alignement
of struct fields. Free variables (declared in a function) are
guaranteed to be 64-bit aligned by the Go compiler.
To ensure the code remains correct upon further addition/removal
of fields, which would change the currently correct alignment, I
added the following comment where required:
// atomic, must remain 64-bit aligned
See https://golang.org/pkg/sync/atomic/#pkg-note-BUG.
* lib/versioner: Add placeholder to provide the absolute file path to external commands
This commit adds support for a new placeholder, %FILE_PATH_FULL%, to the
command of the external versioner. The placeholder will be replaced by
the absolute path of the file that should be deleted.
* Revert "lib/versioner: Add placeholder to provide the absolute file path to external commands"
This reverts commit fb48962b947358e90a76e87a7794adb6057de476.
* lib/versioner: Replace all placeholders in external command (fixes#5849)
Before this commit, only these placeholders were replaced that span a
whole word, for example "%FOLDER_PATH%". Words that consisted of more
than one placeholder or additional characters, for example
"%FOLDER_PATH%/%FILE_PATH%", were left untouched.
* fixup! lib/versioner: Replace all placeholders in external command (fixes#5849)
Use a global raven.Client because they allocate an http.Client for each,
with a separate CA bundle and infinite connection idle time. Infinite
connection idle time means that if the client is never used again it
will always keep the connection around, not verifying whether it's
closed server side or not. This leaks about a megabyte of memory for
each client every created.
client.Close() doesn't help with this because the http.Client is still
around, retained by its own goroutines.
The thing with the map is just to retain the API on sendReport, even
though there will in practice only ever be one DSN per process
instance...
* lib/ur: Implement crash (panic) reporting (fixes#959)
This implements a simple crash reporting method. It piggybacks on the
panic log files created by the monitor process, picking these up and
uploading them from the usage reporting routine.
A new config value points to the crash receiver base URL, which defaults
to "https://crash.syncthing.net/newcrash" (following the pattern of
"https://data.syncthing.net/newdata" for usage reports, but allowing us
to separate the service as required).
