[Tcl-bugs] [tcl] (Ticket 272e866f1e - Change) Crash when reading a file of e.g 1.1 GB

[<tcl...@tc...>]

Repository: http://core.tcl.tk/tcl

Change Notification For
  [Crash when reading a file of e.g 1.1 GB]
  Ticket   http://core.tcl.tk/tcl/tktview?name=272e866f1ec0af1927a7899a81b1c58395832096
  Artifact http://core.tcl.tk/tcl/tinfo?name=1bd98c743c1f5d8e442bee8ecb3e6d87d2a30be0
  On       2013-11-12T19:05:42
  By       gustafn

Changed Fields
  assignee:        nobody
  closer:          nobody
  comment:         When reading a file with e.g. 1.1 GB via

                   set content [read $f]

                   Tcl crashes due to the doubling policy of reallocs on machines where
                   sizeof(int) == 32 (which is as well the case on 64 bit Linux). Due to
                   doubling the length of the buffer, the length variable of type "int"
                   becomes negative on values larger than 1GB. While one can discuss the
                   usefulness of reading large files into memory, the situation can be
                   improved quite easily by limiting the doubling policy to 2GB (actually
                   INT_MAX).

                   The problem happened in a Tcl-based zip-file generator, when the size
                   of a single file is larger than 1.x GB. A sample patch is available (I
                   assume i can attach the patch after writing the ticket). Most probably
                   there are more places in Tcl, where a similar patch might be useful.
  foundin:         8.5.15
  is_private:      0
  login:           gustafn
  priority:        5 Medium
  private_contact: d0ad4471e07e8c03bf0d90786ec6d31e33bcf241
  resolution:      None
  severity:        Severe
  status:          Open
  submitter:       gustafn
  subsystem:       25. Channel System
  title:           Crash when reading a file of e.g 1.1 GB
  type:            Bug