From: Vincent Pit <vince@profvince.com>
Date: Mon, 20 Apr 2015 16:21:08 +0000 (-0300)
Subject: Revamp cloned thread cleanup
X-Git-Tag: rt104312~3
X-Git-Url: http://git.vpit.fr/?p=perl%2Fmodules%2Findirect.git;a=commitdiff_plain;h=42991cca70b2f98cbfc9e7cd1470df0e40842a8d;hp=907b0beb21a8676cccec31189f4e51fca75b2157

Revamp cloned thread cleanup

And fix the third test in t/41-threads-teardown.t to actually test
something. As a result, we see that the module actually catches indirect
constructs inside eval STRING at global destruction time.
---

diff --git a/indirect.xs b/indirect.xs
index 45bb40e..ffb8a22 100644
--- a/indirect.xs
+++ b/indirect.xs
@@ -421,49 +421,10 @@ static void indirect_ptable_clone(pTHX_ ptable_ent *ent, void *ud_) {
  ptable_hints_store(ud->tbl, ent->key, h2);
 }
 
-static void indirect_thread_cleanup(pTHX_ void *ud) {
- int global_teardown;
- dMY_CXT;
-
- global_teardown = indirect_clear_loaded_locked(&MY_CXT);
- assert(!global_teardown);
-
- SvREFCNT_dec(MY_CXT.global_code);
- MY_CXT.global_code = NULL;
-
- ptable_free(MY_CXT.map);
- MY_CXT.map = NULL;
-
- ptable_hints_free(MY_CXT.tbl);
- MY_CXT.tbl = NULL;
-}
-
-static int indirect_endav_free(pTHX_ SV *sv, MAGIC *mg) {
- SAVEDESTRUCTOR_X(indirect_thread_cleanup, NULL);
-
- return 0;
-}
-
-static MGVTBL indirect_endav_vtbl = {
- 0,
- 0,
- 0,
- 0,
- indirect_endav_free
-#if MGf_COPY
- , 0
-#endif
-#if MGf_DUP
- , 0
-#endif
-#if MGf_LOCAL
- , 0
-#endif
-};
-
 #endif /* I_THREADSAFE */
 
 #if I_WORKAROUND_REQUIRE_PROPAGATION
+
 static IV indirect_require_tag(pTHX) {
 #define indirect_require_tag() indirect_require_tag(aTHX)
  const CV *cv, *outside;
@@ -507,6 +468,7 @@ get_enclosing_cv:
 
  return PTR2IV(cv);
 }
+
 #endif /* I_WORKAROUND_REQUIRE_PROPAGATION */
 
 static SV *indirect_tag(pTHX_ SV *value) {
@@ -1046,11 +1008,6 @@ done:
 static void indirect_teardown(pTHX_ void *interp) {
  dMY_CXT;
 
-#if I_MULTIPLICITY
- if (aTHX != interp)
-  return;
-#endif
-
  I_LOADED_LOCK;
 
  if (indirect_clear_loaded_locked(&MY_CXT)) {
@@ -1122,11 +1079,7 @@ static void indirect_setup(pTHX) {
   MY_CXT.global_code = NULL;
  }
 
-#if I_MULTIPLICITY
- call_atexit(indirect_teardown, aTHX);
-#else
  call_atexit(indirect_teardown, NULL);
-#endif
 
  return;
 }
@@ -1150,7 +1103,6 @@ PROTOTYPE: DISABLE
 PREINIT:
  ptable *t;
  SV     *global_code_dup;
- GV     *gv;
 PPCODE:
  {
   indirect_ptable_clone_ud ud;
@@ -1175,26 +1127,9 @@ PPCODE:
    I_LOADED_UNLOCK;
   }
  }
- gv = gv_fetchpv(__PACKAGE__ "::_THREAD_CLEANUP", 0, SVt_PVCV);
- if (gv) {
-  CV *cv = GvCV(gv);
-  if (!PL_endav)
-   PL_endav = newAV();
-  SvREFCNT_inc(cv);
-  if (!av_store(PL_endav, av_len(PL_endav) + 1, (SV *) cv))
-   SvREFCNT_dec(cv);
-  sv_magicext((SV *) PL_endav, NULL, PERL_MAGIC_ext, &indirect_endav_vtbl, NULL, 0);
- }
  XSRETURN(0);
 
-void
-_THREAD_CLEANUP(...)
-PROTOTYPE: DISABLE
-PPCODE:
- indirect_thread_cleanup(aTHX_ NULL);
- XSRETURN(0);
-
-#endif
+#endif /* I_THREADSAFE */
 
 SV *
 _tag(SV *value)
diff --git a/lib/indirect.pm b/lib/indirect.pm
index d0f1068..ebdc061 100644
--- a/lib/indirect.pm
+++ b/lib/indirect.pm
@@ -250,8 +250,6 @@ If you use C<perl> 5.12 or greater, those constructs are correctly reported.
 With 5.8 perls, the pragma does not propagate into C<eval STRING>.
 This is due to a shortcoming in the way perl handles the hints hash, which is addressed in perl 5.10.
 
-Indirect constructs that appear in code C<eval>'d during the global destruction phase of a spawned thread or pseudo-fork (the processes used internally for the C<fork> emulation on Windows) are not reported.
-
 The search for indirect method calls happens before constant folding.
 Hence C<my $x = new Class if 0> will be caught.
 
diff --git a/t/41-threads-teardown.t b/t/41-threads-teardown.t
index a5d45f6..8003fad 100644
--- a/t/41-threads-teardown.t
+++ b/t/41-threads-teardown.t
@@ -57,7 +57,7 @@ SKIP: {
   use threads::shared;
   my $code : shared;
   $code = 0;
-  no indirect cb => sub { lock $code; ++$code };
+  no indirect hook => sub { lock $code; ++$code };
   sub X3::DESTROY { eval $_[0]->{code} }
   threads->create(sub {
    my $x = bless { code => 'new Z3' }, 'X3';
@@ -67,5 +67,6 @@ SKIP: {
   exit $code;
  RUN
  skip RUN_PERL_FAILED() => 1 unless defined $status;
- is $status, 0, 'indirect does not check eval STRING during global destruction at the end of a thread';
+ my $code = $status >> 8;
+ is $code, 1, 'indirect checks eval STRING during global destruction at the end of a cloned thread';
 }