* include/lightning.h, include/lightning/jit_private.h,
lib/lightning.c: Implement the new jit_set_code() interface,
that allows instructing lightning to use an alternate code
buffer. The new jit_realize() function should be called
before jit_set_code(), and usually call jit_get_code()
to query the amount of bytes expected to be required for
the code.
* lib/jit_size.c: Minor update to have less chances of
miscalculating the code buffer by starting the counter
with the size of the longest instruction instead of zero,
as code emit fails if at any moment less than the longest
instruction bytes are available.
* check/setcode.c: New file implementing some basic tests
of the new jit_set_code() interface.
* check/Makefile.am: Update for newer test case.
* configure.ac: Add -fwrapv when using GCC (or compatible), if
supported.
* libguile/numbers.h (SCM_I_MAKINUM): Cast to scm_t_bits (unsigned)
before shifting, to avoid undefined behavior.
* libguile/guile-snarf.in (modern_snarf): Rewrite sed script to cope
with newlines in the snarfed code segments, or multiple code segments
on the same line.
* module/scripts/snarf-check-and-output-texi.scm (process-stream):
Strip all 'hash' tokens from the stream.
(do-command): Remove special cases that handled 'hash' tokens
in a few places.
* include/lightning.h, lib/lightning.c: Add the new
jit_indirect() call, that returns a special label node,
and tells lightning that the label may be the target of
an indirect jump.
* doc/body.texi: Document the new jit_indirect() call, and
add examples of different ways to create labels and branches.
* module/ice-9/boot-9.scm (for-each): Fix detection of not-a-list in the
unrolled one-argument case.
* test-suite/tests/eval.test ("for-each"): Add a test.
* module/statprof.scm (<state>): Add outer-cut member.
(fresh-profiler-state): Add outer-cut kwarg.
(sample-stack-procs): Stop when the stack-length is zero, which will
be before the frames run out if there is an outer cut.
(profile-signal-handler): Use the outer cut when capturing the stack.
(call-thunk): New helper, for use as an outer cut.
(statprof, gcprof): Call the thunk within call-thunk, and use
call-thunk as an outer cut.
* module/statprof.scm: Add a big ol' comment.
(sample-stack-procs): If slot 0 isn't a primitive, use the IP to
mark. In the future we will see more non-procedures in slot 0 as we
start to use call-label and tail-call-label.
* module/statprof.scm (call-data): Source is after printable.
(addr->printable): Just produce a name, without source. Anonymous
printables get "anon " prefixed.
(stack-samples->procedure-data): Adapt to call-data change.
(stats): Add "proc-source" element.
(statprof-call-data->stats): Give a source to the call-data.
(statprof-display): Print source also.
* libguile/c-tokenize.lex: Add %top directive to include <config.h>
first. This fixes builds on systems that use Gnulib's <stdio.h> and
similar replacements. See <http://hydra.nixos.org/build/9259627> for
an example.
* module/statprof.scm (call-data): Add source member.
(stack-samples->procedure-data): Populate source member
(stats): Convert to record from vector.
(statprof-call-data->stats): Adapt to produce a record.
* module/statprof.scm (<state>): Remove record-full-stacks? and stacks
members. The stack trace buffer is sufficient.
(fresh-profiler-state): Adapt.
(sample-stack-procs): Don't save stacks.
(statprof-reset): Deprecate the full-stacks? argument.
(stack-samples->procedure-data): Remove a needless vector-ref.
(stack-samples->callee-lists): New helper.
(statprof-fetch-stacks): Use stack-samples->callee-lists.
(statprof-fetch-call-tree): Use stack-samples->callee-lists, and
implement our own callee->string helper.
(statprof, with-statprof, gcprof): Deprecate full-stacks? argument.
* module/statprof.scm (<state>): Instead of a boolean count-calls?,
treat the presence of a call-counts hash table as indicating a need to
count calls. That hash table maps callees to call counts. A "callee"
is either the IP of the entry of a program, the symbolic name of a
primitive, or the identity of a non-program.
New members "buffer" and "buffer-pos" replace "procedure-data".
We try to avoid analyzing things at runtime, instead just recording
the stack traces into a buffer. This will let us do smarter things
when post-processing.
(fresh-buffer, expand-buffer): New helpers.
(fresh-profiler-state): Adapt to <state> changes.
(sample-stack-procs): Instead of updating the procedure-data
table (which no longer exists), instead trace the stack into the
buffer.
(count-call): Update to update the call-counts table instead of the
procedure-data table.
(statprof-start, statprof-start): Adapt to call-counts change.
(call-data): Move lower in the file. Add "name" and "printable"
members, and no longer store a proc.
(source->string, program-debug-info-printable, addr->pdi)
(addr->printable): New helpers.
(stack-samples->procedure-data): New procedure to process stack trace
buffer into a hash table of the same format as the old procedure-data
table.
(statprof-fold-call-data, statprof-proc-call-data): Use
stack-samples->procedure-data instead of procedure-data.
(statprof-call-data->stats): Adapt to count-calls change.
(statprof-display, statprof-display-anomalies): Adapt.
* module/system/vm/program.scm: Export primitive?. Primitive
program-code doesn't map uniquely to the primitive, which may be of
interest to various meta-level utilities like statprof.
* test-suite/tests/statprof.test ("statistical sample counts within
expected range"): Increase number of calls, as the computer speed
increases and VM/compiler speed increases have meant that we get fewer
samples than before. Also, compare the maximum deviation to the
square root of the expected value. I don't actually know what the
right statistical check is here, but this is closer to an "all points
fall within a standard deviation" than our previous 30% check. Print
a nicer warning when the check fails.
* module/statprof.scm (statprof-start, statprof-stop): Take optional
state arg.
(statprof-reset): Return no values.
(statprof): Take port keyword arg. Since statprof-reset is now the
same as parameterizing profiler-state, there's no need to call
statprof-reset. Pass the state argument explicitly to statprof-start,
statprof-stop, and statprof-display.
* module/statprof.scm (<state>): Add field for the previous SIGPROF
handler.
(statprof-start, statprof-stop, statprof-reset): Instead of setting
the SIGPROF handler in statprof-reset, set it when the profiler
becomes active, and actually restore it when the profiler becomes
inactive.
* module/statprof.scm (statprof-display, statprof-display-anomalies)
(statprof-accumulated-time, statprof-sample-count)
(statprof-fetch-stacks, statprof-fetch-call-tree): Take optional state
argument.
(statprof-display-anomolies): Deprecate this mis-spelling.
(statprof): Just compute usecs for the period.
* doc/ref/posix.texi (Signals): Fix the documentation for setitimer; it
was wrong.
* libguile/scmsigs.c (pack_tv): New helper. Allow usecs >= 1e6.
(unpack_tv): New helper.
(scm_setitimer): Use the new helpers.
* test-suite/tests/signals.test: Add setitimer tests.
* module/texinfo.scm (read-char-data): Preserve newlines in @example and
similar environments in the case when the next line starts with an @.
* test-suite/tests/texinfo.test ("test-texinfo->stexinfo"): Add a test.
* module/statprof.scm (gcprof): No need to reset in gcprof; the fresh
profiler state and the parameterize handle that. Fix mistaken
set-vm-trace-level! as well.
* module/statprof.scm (<state>): The sampling frequency is actually a
period; label it as such, and express in microseconds instead of as a
pair. Likewise for remaining-prof-time.
(fresh-profiler-state): Adapt.
(reset-sigprof-timer): New helper.
(profile-signal-handler): Use the new helper.
(statprof-start): Use the new helper.
(statprof-stop): Here too.
(statprof-reset): Adapt to <state> change.
(gcprof): Set remaining prof time to 0.
* module/language/cps/simplify.scm (prune-continuations): Prune
continuations as a post-pass with a fresh DFG. Using a
pre-eta-conversion DFG as we were doing before missed some cases.
* lib/jit_x86.c: Rewrite previous patch to inline save/restore
because clobbering %ebx in x86 is treated as an error
(jit_x86.c:239:5: error: PIC register clobbered by 'ebx' in 'asm').
* module/statprof.scm (profile-signal-handler): Don't bother detecting
if we were in a count-call call or not; it doesn't matter, and we
should accumulate time in any case.
* module/statprof.scm (fresh-profiler-state): accumulated-time and
gc-time-taken are in jiffies, not seconds, so they are exact.
(statprof-accumulated-time): Divide by 1.0 so that we get a flonum.
Also refactor use of assq to get the gc-time-taken.
* libguile/vm-engine.c (BR_UNARY, BR_BINARY, BR_ARITHMETIC): A jump with
a zero offset is also a backward branch, in the sense that it's not a
forward branch.
("br"): We forgot to VM_HANDLE_INTERRUPTS here on backwards branches.
Oops!
* module/language/cps/simplify.scm (compute-eta-reductions): Avoid
trying to eta-reduce a jump-to-self, as in (let lp () (lp)). This
caused the compiler to hang.
* module/statprof.scm (get-call-data, sample-stack-procs): Take the
state as an argument.
(profile-signal-handler, count-call, statprof-proc-call-data)
(gcprof): Adapt.
* module/statprof.scm (statprof-reset, statprof-fold-call-data):
(statprof-proc-call-data, statprof-accumulated-time):
(statprof-sample-count): Refactor some things to use statprof-active?
instead of checking the profile level manually.
* module/statprof.scm (fresh-profiler-state): New helper.
(ensure-profiler-state): Use it.
(accumulate-time): No need to add 0.0 here.
(statprof-reset): Create a new state instead of mutating the existing
one.
