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Trace :return of builtin methods

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using opt_invokebuiltin_delegate_leave insn.

Since Ruby 2.7, :return of methods using builtin have not been traced properly.
This commit is contained in:
Takashi Kokubun 2020-06-23 23:41:57 -07:00
parent fbb32b1f48
commit 3e02cd518f
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GPG key ID: 6FFC433B12EE23DD
3 changed files with 20 additions and 2 deletions
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2
insns.def
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@ -1509,7 +1509,7 @@ opt_invokebuiltin_delegate_leave
val = vm_invoke_builtin_delegate(ec, reg_cfp, bf, (unsigned int)index);
/* leave fastpath */
/* TracePoint/return should fallback this insn to opt_invokebuiltin_delegate */
/* TracePoint/return fallbacks this insn to opt_invokebuiltin_delegate */
if (vm_pop_frame(ec, GET_CFP(), GET_EP())) {
#if OPT_CALL_THREADED_CODE
rb_ec_thread_ptr(ec)->retval = val;

6
iseq.c
View file

@ -3125,8 +3125,12 @@ rb_vm_encoded_insn_data_table_init(void)
encoded_insn_data = st_init_numtable_with_size(VM_INSTRUCTION_SIZE / 2);
for (insn = 0; insn < VM_INSTRUCTION_SIZE/2; insn++) {
int traced_insn = insn;
if (traced_insn == BIN(opt_invokebuiltin_delegate_leave)) {
traced_insn = BIN(opt_invokebuiltin_delegate); // to dispatch :return from leave
}
st_data_t key1 = (st_data_t)INSN_CODE(insn);
st_data_t key2 = (st_data_t)INSN_CODE(insn + VM_INSTRUCTION_SIZE/2);
st_data_t key2 = (st_data_t)INSN_CODE(traced_insn + VM_INSTRUCTION_SIZE/2);
insn_data[insn].insn = (int)insn;
insn_data[insn].insn_len = insn_len(insn);

14
test/ruby/test_settracefunc.rb
View file

@ -2292,4 +2292,18 @@ class TestSetTraceFunc < Test::Unit::TestCase
def test_stat_exists
assert_instance_of Hash, TracePoint.stat
end
def test_tracepoint_opt_invokebuiltin_delegate_leave
code = 'puts RubyVM::InstructionSequence.of("\x00".method(:unpack)).disasm'
out, _err, _status = EnvUtil.invoke_ruby(['-e', code], '', true)
assert_match /^0000 opt_invokebuiltin_delegate_leave /, out
events = []
TracePoint.new(:return) do |tp|
events << [tp.event, tp.method_id]
end.enable do
"\x00".unpack("c")
end
assert_equal [[:return, :unpack]], events
end
end