Skip to content

GitLab

  • Projects
  • Groups
  • Snippets
  • Help
    • Loading...
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in / Register
GHC
GHC
  • Project overview
    • Project overview
    • Details
    • Activity
    • Releases
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 4,265
    • Issues 4,265
    • List
    • Boards
    • Labels
    • Service Desk
    • Milestones
    • Iterations
  • Merge Requests 419
    • Merge Requests 419
  • Requirements
    • Requirements
    • List
  • CI / CD
    • CI / CD
    • Pipelines
    • Jobs
    • Schedules
  • Security & Compliance
    • Security & Compliance
    • Dependency List
    • License Compliance
  • Operations
    • Operations
    • Incidents
    • Environments
  • Analytics
    • Analytics
    • CI / CD
    • Code Review
    • Insights
    • Issue
    • Repository
    • Value Stream
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Members
    • Members
  • Collapse sidebar
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #11234

Closed
Open
Opened Dec 15, 2015 by Tamar Christina@PhyxDeveloper

GHCi on Windows segfaults

GHCi on Windows has had a segfault for while now on x86_64. During the upgrade of GCC in D1123 I noticed that test prog003 was failing with a segfault.

Currently the segfault exist in both versions but on x86 it's particularly easy to trigger.

In my case I can't even start ghci.

$ inplace/bin/GHC-stage2.exe --interactive
GHCi, version 7.11.20151213: http://www.haskell.org/ghc/  :? for help
Segmentation fault/access violation in generated code

The segfault does not seem to happen when linked to the debug rts, and running with +RTS -Ds -RTS doesn't report anything special.

Compiling with devel2 so the rts gets compiled with -g the stack trace is not very useful.

(gdb) run --interactive
Starting program: /home/Tamar/ghc/inplace/bin/ghc-stage2 --interactive
[New Thread 108480.0x1960c]
[New Thread 108480.0x19b2c]
[New Thread 108480.0x19c30]
[New Thread 108480.0x1a0a8]
[New Thread 108480.0x1a93c]
[New Thread 108480.0x13954]
[New Thread 108480.0x14440]
GHCi, version 7.11.20151213: http://www.haskell.org/ghc/  :? for help

Program received signal SIGSEGV, Segmentation fault.
0x06843aa5 in ?? ()
(gdb) bt
#0  0x06843aa5 in ?? ()
#1  0x04b82cfc in ?? ()
#2  0x8d078902 in ?? ()
#3  0xc689fd47 in ?? ()
#4  0xff04c583 in ?? ()
#5  0x83c70065 in ?? ()
#6  0x0000033c in ?? ()
#7  0x00000008 in ?? ()
#8  0x04e9c689 in ?? ()
Backtrace stopped: Cannot access memory at address 0x47c70cc8

And the output of p4

(gdb) p4 0x06843aa5
0x6843ab0:      0x330073
0x6843aac:      0x790073 <c1CgU_info+131>
0x6843aa8:      0x6d005c <c1rsa_info+715>
0x6843aa4:      0x3a0045
Trac metadata
Trac field Value
Version 7.11
Type Bug
TypeOfFailure OtherFailure
Priority high
Resolution Unresolved
Component Runtime System
Test case
Differential revisions
BlockedBy
Related
Blocking
CC simonmar
Operating system
Architecture
Assignee
Assign to
8.0.1
Milestone
8.0.1 (Past due)
Assign milestone
Time tracking
None
Due date
None
Reference: ghc/ghc#11234