Enhance the functions called by _testmain.go during "go test -cover"
test binary runs to allow for injection of extra or "auxiliary"
meta-data files when reporting coverage statistics. There are unit
tests for this functionality, but it is not yet wired up to be used by
the Go command yet, that will appear in a subsequent patch.
Change-Id: I10b79ca003fd7a875727dc1a86f23f58d6bf630c
Reviewed-on: https://go-review.googlesource.com/c/go/+/495451
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Add a new function runtime/coverage.snapshot(), which samples the
current values of coverage counters in a running "go test -cover"
binary and returns percentage of statements executed so far. This
function is intended to be used by the function testing.Coverage().
Updates #59590.
Change-Id: I861393701c0cef47b4980aec14331168a9e64e8e
Reviewed-on: https://go-review.googlesource.com/c/go/+/495449
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Add a flag to EmitPercent indicating to emit a single line percent
summary across all packages as opposed to a line per package. We need
to set this flag when reporting as part of a "go test -cover" run, but
false when reporting as part of a "go tool covdata percent" run.
Change-Id: Iba6a81b9ae27e3a5aaf9d0e46c0023c0e7ceae16
Reviewed-on: https://go-review.googlesource.com/c/go/+/495448
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
When walking through the set of coverage data files generated from a
"go test -cover" run, it's possible to encounter pods (clumps of data
files) that were generated by a run from an instrumented Go tool (for
example, cmd/compile). Add a guard to the test reporting code to
ensure that it only processes files created by the currently running
test.
Fixes#57924.
Change-Id: I1bb7dce88305e1088162e3cb1df628486ecee1c1
Reviewed-on: https://go-review.googlesource.com/c/go/+/462756
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
The processPod() helper (invoked by processCoverTestDir, which is in
turn called by _testmain.go) was opening and reading counter data
files, but never closing them. Add a call to close the files after
they have been read.
Fixes#57407.
Change-Id: If9a489f92e4bab72c5b2df8697e14420a6f7b8f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/458835
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Add a testpoint to cover support routines used to help
implement "go test -cover".
Change-Id: Ic28bf884a4e0d2c0a6d8fd04fc29c0c949227f21
Reviewed-on: https://go-review.googlesource.com/c/go/+/432315
Reviewed-by: Bryan Mills <bcmills@google.com>
This patch fleshes out the runtime support for emitting coverage data
at the end of a run of an instrumented binary. Data is emitted in the
form of a pair of files, a meta-out-file and counter-data-outfile,
each written to the dir GOCOVERDIR. The meta-out-file is emitted only
if required; no need to emit again if an existing meta-data file with
the same hash and length is present.
Updates #51430.
Change-Id: I59d20a4b8c05910c933ee29527972f8e401b1685
Reviewed-on: https://go-review.googlesource.com/c/go/+/355451
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Than McIntosh <thanm@google.com>
