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Andrew Burgess 67943c005f gdb: Fix instability in thread groups test
In the test script gdb.mi/list-thread-groups-available.exp we ask GDB
to list all thread groups, and match the output against a
regexp. Occasionally, I would see this test fail.

The expected output is a list of entries, each entry looking roughly
like this:

  {id="<DECIMAL>",type="process",description="<STRING>",
   user="<STRING>",cores=["<DECIMAL>","<DECIMAL>",...]}

All the fields after 'id' and 'type' are optional, and the 'cores'
list can contain 1 or more "<DECIMAL>" entries.

On my machine (Running Fedora 27, kernel 4.17.3-100.fc27.x86_64)
usually the 'description' is a non-empty string, and the 'cores' list
has at least one entry in it.  But sometimes, very rarely, I'll see an
entry in the process group list where the 'description' is an empty
string, the 'user' is the string "?", and the 'cores' list is empty.
Such an entry looks like this:

   {id="19863",type="process",description="",user="?",cores=[]}

I believe that this is caused by the process exiting while GDB is
scanning /proc for process information.  The current code in
gdb/nat/linux-osdata.c is not (I think) resilient against exiting
processes.

This commit adjusts the regex that matches the 'cores' list so that an
empty list is acceptable, with this patch in place the test script
gdb.mi/list-thread-groups-available.exp never fails for me now.

I've only adjusted the cores regexp for the occasion when we have GDB
read information about all processes, its only in this case that we
might encounter an exiting process.  When we read information about
two known PIDs, that we know will not exit for the duration of the
test, we require that the core list be non-empty.

gdb/testsuite/ChangeLog:

	* gdb.mi/list-thread-groups-available.exp: Update test regexp.
2018-08-14 13:38:51 +01:00
bfd Automatic date update in version.in 2018-08-14 00:00:28 +00:00
binutils Always use align_size as pr_datasz for GNU_PROPERTY_STACK_SIZE 2018-08-10 08:14:24 -07:00
config
contrib Update dg-extract-results.* from gcc 2018-08-06 16:05:16 +02:00
cpu PR23430, Indices misspelled 2018-07-24 19:58:12 +09:30
elfcpp
etc
gas When the assembler reports that the input and output are the same, report the file names involved, in order to help debugging. Also do not equate two files are the same if the have the same inode value but reside on different file systems. 2018-08-14 12:22:35 +01:00
gdb gdb: Fix instability in thread groups test 2018-08-14 13:38:51 +01:00
gold Fix "may be used uninitialized" warning. 2018-08-07 22:40:33 -07:00
gprof
include arm - Add some comments about the versions of ARM ELF that define various e_flags values 2018-08-09 16:51:09 +01:00
intl Backport gettext fixes to get rid of warnings on macOS 2018-08-02 14:56:02 -04:00
ld ld-x86-64/pr23486b.d: Swap pr23486a.s and pr23486a.s 2018-08-12 05:39:00 -07:00
libdecnumber
libiberty Copy from GCC: Add linker_output as prefix for LTO temps (PR lto/86548). 2018-08-01 14:23:10 +01:00
opcodes x86: Add CpuCMOV and CpuFXSR 2018-08-11 14:37:32 -07:00
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