namespace factor {
+// This is like the growable_array class, except the whole of it
+// exists on the Factor heap. growarr = growable array.
+static cell growarr_capacity(array *growarr) {
+ return untag_fixnum(growarr->data()[0]);
+}
+
+static cell growarr_nth(array *growarr, cell slot) {
+ return array_nth(untag<array>(growarr->data()[1]), slot);
+}
+
+// Allocates memory
+array* factor_vm::allot_growarr() {
+ data_root<array> contents(allot_array(10, false_object), this);
+ array *growarr = allot_uninitialized_array<array>(2);
+ set_array_nth(growarr, 0, tag_fixnum(0));
+ set_array_nth(growarr, 1, contents.value());
+ return growarr;
+}
+
+// Allocates memory
+void factor_vm::growarr_add(array *growarr_, cell elt_) {
+ data_root<array> growarr(growarr_, this);
+ data_root<object> elt(elt_, this);
+ data_root<array> contents(growarr.untagged()->data()[1], this);
+
+ cell count = growarr_capacity(growarr.untagged());
+ if (count == array_capacity(contents.untagged())) {
+ contents.set_untagged(reallot_array(contents.untagged(), 2 * count));
+ set_array_nth(growarr.untagged(), 1, contents.value());
+ }
+ set_array_nth(contents.untagged(), count, elt.value());
+ set_array_nth(growarr.untagged(), 0, tag_fixnum(count + 1));
+}
+
profiling_sample_count profiling_sample_count::record_counts() volatile {
atomic::fence();
profiling_sample_count returned(sample_count, gc_sample_count,
callstack_begin(callstack_begin),
callstack_end(callstack_end) { }
+// Allocates memory (sample_callstacks2->add)
void factor_vm::record_sample(bool prolog_p) {
profiling_sample_count counts = sample_counts.record_counts();
if (counts.empty()) {
}
// Appends the callstack, which is just a sequence of quotation or
// word references, to sample_callstacks.
- cell begin = sample_callstacks.size();
+ cell callstacks_cell = special_objects[OBJ_SAMPLE_CALLSTACKS];
+ data_root<array> callstacks = data_root<array>(callstacks_cell, this);
+ cell begin = growarr_capacity(callstacks.untagged());
bool skip_p = prolog_p;
auto recorder = [&](cell frame_top, cell size, code_block* owner, cell addr) {
if (skip_p)
skip_p = false;
- else
- sample_callstacks.push_back(owner->owner);
+ else {
+ growarr_add(callstacks.untagged(), owner->owner);
+ }
};
iterate_callstack(ctx, recorder);
- cell end = sample_callstacks.size();
+ cell end = growarr_capacity(callstacks.untagged());
// Add the sample.
cell thread = special_objects[OBJ_CURRENT_THREAD];
}
void factor_vm::start_sampling_profiler(fixnum rate) {
+ special_objects[OBJ_SAMPLE_CALLSTACKS] = tag<array>(allot_growarr());
samples_per_second = rate;
sample_counts.clear();
// Release the memory consumed by collecting samples.
samples.clear();
samples.shrink_to_fit();
- sample_callstacks.clear();
- sample_callstacks.shrink_to_fit();
-
samples.reserve(10 * rate);
- sample_callstacks.reserve(100 * rate);
atomic::store(&sampling_profiler_p, true);
start_sampling_profiler_timer();
}
void factor_vm::primitive_get_samples() {
if (atomic::load(&sampling_profiler_p) || samples.empty()) {
ctx->push(false_object);
- } else {
- data_root<array> samples_array(allot_array(samples.size(), false_object),
- this);
- std::vector<profiling_sample>::const_iterator from_iter = samples.begin();
- cell to_i = 0;
-
- for (; from_iter != samples.end(); ++from_iter, ++to_i) {
- data_root<array> sample(allot_array(7, false_object), this);
-
- set_array_nth(sample.untagged(), 0,
- tag_fixnum(from_iter->counts.sample_count));
- set_array_nth(sample.untagged(), 1,
- tag_fixnum(from_iter->counts.gc_sample_count));
- set_array_nth(sample.untagged(), 2,
- tag_fixnum(from_iter->counts.jit_sample_count));
- set_array_nth(sample.untagged(), 3,
- tag_fixnum(from_iter->counts.foreign_sample_count));
- set_array_nth(sample.untagged(), 4,
- tag_fixnum(from_iter->counts.foreign_thread_sample_count));
-
- set_array_nth(sample.untagged(), 5, from_iter->thread);
-
- cell callstack_size =
- from_iter->callstack_end - from_iter->callstack_begin;
- data_root<array> callstack(allot_array(callstack_size, false_object),
+ return;
+ }
+ data_root<array> samples_array(allot_array(samples.size(), false_object),
this);
-
- for (cell i = 0; i < callstack_size; i++) {
- set_array_nth(callstack.untagged(), i,
- sample_callstacks[from_iter->callstack_begin + i]);
- }
- set_array_nth(sample.untagged(), 6, callstack.value());
- set_array_nth(samples_array.untagged(), to_i, sample.value());
+ std::vector<profiling_sample>::const_iterator from_iter = samples.begin();
+ cell to_i = 0;
+
+ cell callstacks_cell = special_objects[OBJ_SAMPLE_CALLSTACKS];
+ data_root<array> callstacks = data_root<array>(callstacks_cell, this);
+
+ for (; from_iter != samples.end(); ++from_iter, ++to_i) {
+ data_root<array> sample(allot_array(7, false_object), this);
+
+ set_array_nth(sample.untagged(), 0,
+ tag_fixnum(from_iter->counts.sample_count));
+ set_array_nth(sample.untagged(), 1,
+ tag_fixnum(from_iter->counts.gc_sample_count));
+ set_array_nth(sample.untagged(), 2,
+ tag_fixnum(from_iter->counts.jit_sample_count));
+ set_array_nth(sample.untagged(), 3,
+ tag_fixnum(from_iter->counts.foreign_sample_count));
+ set_array_nth(sample.untagged(), 4,
+ tag_fixnum(from_iter->counts.foreign_thread_sample_count));
+
+ set_array_nth(sample.untagged(), 5, from_iter->thread);
+
+ cell callstack_size =
+ from_iter->callstack_end - from_iter->callstack_begin;
+ data_root<array> callstack(allot_array(callstack_size, false_object),
+ this);
+
+ for (cell i = 0; i < callstack_size; i++) {
+ cell block_owner = growarr_nth(callstacks.untagged(),
+ from_iter->callstack_begin + i);
+ set_array_nth(callstack.untagged(), i, block_owner);
}
- ctx->push(samples_array.value());
+ set_array_nth(sample.untagged(), 6, callstack.value());
+ set_array_nth(samples_array.untagged(), to_i, sample.value());
}
+ ctx->push(samples_array.value());
}
}