Bug 1372822

Summary:

pthread_cancel inside exception handler and cancel point called from C++ code unexpected behavior

Product:

Red Hat Enterprise Linux 8

Reporter:

Paulo Andrade <pandrade>

Component:

gcc

Assignee:

Marek Polacek <mpolacek>

gcc sub component:

gcc-toolset-10

QA Contact:

Alexandra Petlanová Hájková <ahajkova>

Status:

CLOSED UPSTREAM

Docs Contact:

Severity:

medium

Priority:

medium

CC:

ahajkova, cww, dbasant, fweimer, jakub, jwakely, mnewsome, mpolacek, ohudlick, pbhoot, sipoyare, vmukhame

Version:

8.2

Keywords:

Triaged

Target Milestone:

Target Release:

8.2

Hardware:

All

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

If docs needed, set a value

Doc Text:

Story Points:

---

Clone Of:

Environment:

Last Closed:

2021-04-06 18:41:17 UTC

Type:

Bug

Regression:

---

Mount Type:

---

Documentation:

---

CRM:

Verified Versions:

Category:

---

oVirt Team:

---

RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Bug Depends On:

Bug Blocks:

1461138, 1477664

Attachments:

Description	Flags
thread.cxx	none

Description Paulo Andrade 2016-09-02 19:14:52 UTC

Created attachment 1197277 [details]
thread.cxx

In the attached test case, if flush is called, it
will fail with the message:

terminate called after throwing an instance of 'std::runtime_error'

  The test case fails because of 'endl'.

  Other kinds of cancellation points work as expected.

Comment 2 Marek Polacek 2016-10-04 09:44:14 UTC

Wrong component.

Comment 4 Jakub Jelinek 2016-10-18 07:36:44 UTC

Simpler testcase, without STL, needs just libsupc++ and libpthread:

#include <pthread.h>
#include <unistd.h>

namespace __cxxabiv1
{  
  class __forced_unwind
  {
    virtual ~__forced_unwind() throw();
    virtual void __pure_dummy() = 0; 
  };
}

int a;

extern "C" void *
fun (void *)
{
  try
  {
    throw 1;
  }
  catch (int &)
  {
    try
    {
      char buf[10];
      for (;;)
	read (4, buf, 0);
    }
    catch (__cxxabiv1::__forced_unwind &)
    {
      a = 5;
      throw;
    }
  }

  return NULL;
}

int
main ()
{
  pthread_t thread;
  pthread_create (&thread, NULL, fun, NULL);
  pthread_cancel (thread);
  pthread_join (thread, NULL);
}

Comment 5 Jakub Jelinek 2016-10-18 07:37:51 UTC

All GCC versions affected.

Comment 10 Divya 2017-07-31 05:15:11 UTC

Hello 

Can we get a update on likelyhood of this getting fixed in RHEL-6?

Comment 32 Marek Polacek 2021-04-06 18:41:17 UTC

This BZ depends on the upstream bug being fixed.  There hasn't been any progress, so I'm closing this BZ in favor of the upstream bug.