[Bug dap/30686] New: [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[Bug dap/30686] New: [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

            Bug ID: 30686
           Summary: [gdb/dap] ERROR: eof reading json header in
                    gdb.dap/cond-bp.exp
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dap
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

Gdb build with -O0 at commit bcf43b33cfd ("[gdb/testsuite] Drop -nostdlib in
gdb.dwarf2/typeddwarf.exp").

Stress test of gdb.dap/*.exp:
...
$ for n in $(seq 1 25); do ./test.sh ; cat
leap-15-4/build/gdb/testsuite/gdb.{sum,log} ; done 2>&1 | tee LOG | grep "# of
expected "
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            214
# of expected passes            214
# of expected passes            214
# of expected passes            214
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
# of expected passes            224
...

The 214 is due to:
...
Running /data/vries/gdb/src/gdb/testsuite/gdb.dap/cond-bp.exp ...
PASS: gdb.dap/cond-bp.exp: startup - initialize success
PASS: gdb.dap/cond-bp.exp: startup - launch success
PASS: gdb.dap/cond-bp.exp: set invalid breakpoints success
PASS: gdb.dap/cond-bp.exp: breakpoint 1 invalid
PASS: gdb.dap/cond-bp.exp: breakpoint 1 has message
PASS: gdb.dap/cond-bp.exp: breakpoint 2 invalid
PASS: gdb.dap/cond-bp.exp: breakpoint 2 has message
ERROR: eof reading json header
    while executing
"error "eof reading json header""
    invoked from within
"expect {
-i exp9 -timeout 10
        -re "^Content-Length: (\[0-9\]+)\r\n" {
            set length $expect_out(1,string)
            exp_continue
        }
        -re "^(\[^\r\n\]+)\..."
    ("uplevel" body line 1)
    invoked from within
"uplevel $body" NONE eof reading json header
ERROR: tcl error sourcing
/data/vries/gdb/src/gdb/testsuite/gdb.dap/cond-bp.exp.
ERROR: eof reading json header
    while executing
"error "eof reading json header""
    ("uplevel" body line 2)
    invoked from within
"uplevel $error_sect"
    invoked from within
"remote_expect host 10 {
        -re "^Content-Length: (\[0-9\]+)\r\n" {
            set length $expect_out(1,string)
            exp_continue
        }
        -re "^(\[^\r\n\]+)\r\n" {..."
    ("uplevel" body line 1)
    invoked from within
"uplevel remote_expect host $tmt $expcode"
    invoked from within
"gdb_expect {
        -re "^Content-Length: (\[0-9\]+)\r\n" {
            set length $expect_out(1,string)
            exp_continue
        }
        -re "^(\[^\r\n\]+)\r\n" {
            # Any..."
    (procedure "_dap_read_json" line 3)
    invoked from within
"_dap_read_json"
    (procedure "_dap_read_response" line 4)
    invoked from within
"_dap_read_response $command $seq"
    (procedure "dap_request_and_response" line 3)
    invoked from within
"dap_request_and_response $command $obj"
    (procedure "dap_check_request_and_response" line 2)
    invoked from within
"dap_check_request_and_response "set conditional breakpoint" \
             setBreakpoints \
             [format {o source [o path [%s]] \
                          breakpoints [a [o li..."
    (file "/data/vries/gdb/src/gdb/testsuite/gdb.dap/cond-bp.exp" line 52)
    invoked from within
"source /data/vries/gdb/src/gdb/testsuite/gdb.dap/cond-bp.exp"
    ("uplevel" body line 1)
    invoked from within
"uplevel #0 source /data/vries/gdb/src/gdb/testsuite/gdb.dap/cond-bp.exp"
    invoked from within
"catch "uplevel #0 source $test_file_name""
...

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 15013
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15013&action=edit
LOG.gz

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Reran with just gdb.dap/cond-bp.exp.  Triggered 2 out of 100.

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
backtrace from core file:
...
(gdb) bt
#0  raise (sig=11) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x0000000000790377 in handle_fatal_signal (sig=11) at
/data/vries/gdb/src/gdb/event-top.c:912
#2  0x00000000007903ff in handle_sigsegv (sig=11) at
/data/vries/gdb/src/gdb/event-top.c:962
#3  <signal handler called>
#4  _PyObject_Alloc (use_calloc=0, nelem=1, elsize=60, ctx=<optimized out>) at
Objects/obmalloc.c:1277
#5  0x00007f1997d33d24 in PyUnicode_New (size=11, maxchar=<optimized out>) at
Objects/unicodeobject.c:1310
#6  0x00007f1997d35295 in PyUnicode_New (size=<optimized out>,
maxchar=maxchar@entry=127)
    at Objects/unicodeobject.c:1361
#7  0x00007f197c1fafaa in ascii_escape_unicode (pystr=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:199
#8  py_encode_basestring_ascii (self=<optimized out>, pystr=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:619
#9  0x00007f197c1fc3ef in encoder_encode_string (s=0x7f197ec10138,
s=0x7f197ec10138, obj='cond-bp.c')
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1437
#10 encoder_listencode_obj (s=0x7f197ec10138, acc=0x7f194f7fc3a0,
obj='cond-bp.c', indent_level=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1475
#11 0x00007f197c1fcb5f in encoder_listencode_dict (indent_level=0,
dct=<optimized out>, acc=0x7f194f7fc3a0, 
    s=0x7f197ec10138) at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1684
#12 encoder_listencode_obj (s=0x7f197ec10138, acc=0x7f194f7fc3a0,
obj=<optimized out>, indent_level=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1502
#13 0x00007f197c1fcb5f in encoder_listencode_dict (indent_level=0,
dct=<optimized out>, acc=0x7f194f7fc3a0, 
    s=0x7f197ec10138) at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1684
#14 encoder_listencode_obj (s=0x7f197ec10138, acc=0x7f194f7fc3a0,
obj=<optimized out>, indent_level=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1502
#15 0x00007f197c1fcb5f in encoder_listencode_dict (indent_level=0,
dct=<optimized out>, acc=0x7f194f7fc3a0, 
    s=0x7f197ec10138) at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1684
#16 encoder_listencode_obj (s=0x7f197ec10138, acc=0x7f194f7fc3a0,
obj=<optimized out>, indent_level=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1502
--Type <RET> for more, q to quit, c to continue without paging--
#17 0x00007f197c1fcb5f in encoder_listencode_dict (indent_level=0,
dct=<optimized out>, acc=0x7f194f7fc3a0, 
    s=0x7f197ec10138) at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1684
#18 encoder_listencode_obj (s=0x7f197ec10138, acc=0x7f194f7fc3a0,
obj=<optimized out>, indent_level=<optimized out>)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1502
#19 0x00007f197c1fcfe3 in encoder_call (self=self@entry=<_json.Encoder at
remote 0x7f197ec10138>, 
    args=args@entry=({'type': 'event', 'event': 'breakpoint', 'body':
{'reason': 'changed', 'breakpoint': {'id': 3, 'verified': True, 'source':
{'name': 'cond-bp.c', 'sourceReference': 0, 'path':
'/data/vries/gdb/binutils-gdb.git/gdb/testsuite/gdb.dap/cond-bp.c'}, 'line':
24, 'instructionReference': '0x4004d4'}}, 'seq': 14}, 0), kwds=kwds@entry=0x0)
    at
/usr/src/debug/python3-core-3.6.15-150300.10.48.1.x86_64/Modules/_json.c:1363
#20 0x00007f1997ccbab9 in _PyObject_FastCallDict (func=<_json.Encoder at remote
0x7f197ec10138>, 
    args=<optimized out>, nargs=<optimized out>, kwargs=0x0) at
Objects/abstract.c:2331
#21 0x00007f1997d858aa in call_function
(pp_stack=pp_stack@entry=0x7f194f7fc508, oparg=<optimized out>, 
    kwnames=kwnames@entry=0x0) at Python/ceval.c:4875
#22 0x00007f1997d89ed5 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3335
#23 0x00007f1997d854d6 in _PyEval_EvalCodeWithName (_co=<code at remote
0x7f197eceeed0>, globals=<optimized out>, 
    locals=locals@entry=0x0, args=<optimized out>, argcount=2,
kwnames=0x7f197ec93610, kwargs=0x7f197ec48cc8, 
    kwcount=1, kwstep=1, defs=0x7f197ec93728, defcount=1, kwdefs=0x0,
closure=0x0, name='iterencode', 
    qualname='JSONEncoder.iterencode') at Python/ceval.c:4166
#24 0x00007f1997d8574f in fast_function (func=<optimized out>, stack=<optimized
out>, nargs=<optimized out>, 
    kwnames=<optimized out>) at Python/ceval.c:4992
#25 0x00007f1997d85955 in call_function
(pp_stack=pp_stack@entry=0x7f194f7fc7f0, oparg=<optimized out>, 
    kwnames=kwnames@entry=('_one_shot',)) at Python/ceval.c:4872
#26 0x00007f1997d8878e in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3351
#27 0x00007f1997d8567f in _PyFunction_FastCall (co=<optimized out>,
args=<optimized out>, nargs=2, 
    globals=<optimized out>) at Python/ceval.c:4933
#28 0x00007f1997d85816 in fast_function (func=<optimized out>, stack=<optimized
out>, nargs=<optimized out>, 
--Type <RET> for more, q to quit, c to continue without paging--
    kwnames=<optimized out>) at Python/ceval.c:4975
#29 0x00007f1997d85955 in call_function
(pp_stack=pp_stack@entry=0x7f194f7fc988, oparg=<optimized out>, 
    kwnames=kwnames@entry=0x0) at Python/ceval.c:4872
#30 0x00007f1997d89ed5 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3335
#31 0x00007f1997d854d6 in _PyEval_EvalCodeWithName (_co=<code at remote
0x7f197eceac00>, globals=<optimized out>, 
    locals=locals@entry=0x0, args=<optimized out>, argcount=1, kwnames=0x0,
kwargs=0x7f197ec41de0, kwcount=0, 
    kwstep=1, defs=0x0, defcount=0, 
    kwdefs={'skipkeys': False, 'ensure_ascii': True, 'check_circular': True,
'allow_nan': True, 'cls': None, 'indent': None, 'separators': None, 'default':
None, 'sort_keys': False}, closure=0x0, name='dumps', qualname='dumps')
    at Python/ceval.c:4166
#32 0x00007f1997d8574f in fast_function (func=<optimized out>, stack=<optimized
out>, nargs=<optimized out>, 
    kwnames=<optimized out>) at Python/ceval.c:4992
#33 0x00007f1997d85955 in call_function
(pp_stack=pp_stack@entry=0x7f194f7fcc68, oparg=<optimized out>, 
    kwnames=kwnames@entry=0x0) at Python/ceval.c:4872
#34 0x00007f1997d89ed5 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3335
#35 0x00007f1997d854d6 in _PyEval_EvalCodeWithName (_co=<code at remote
0x7f197ec358a0>, globals=<optimized out>, 
    locals=locals@entry=0x0, args=args@entry=0x7f198c009060, argcount=0,
kwnames=kwnames@entry=0x7f198c009060, 
    kwargs=0x7f198c009068, kwcount=0, kwstep=2, defs=0x0, defcount=0,
kwdefs=0x0, 
    closure=(<cell at remote 0x7f197ebf9ac8>, <cell at remote 0x7f197ebf9b28>),
name=0x0, qualname=0x0)
    at Python/ceval.c:4166
#36 0x00007f1997d85b0e in PyEval_EvalCodeEx (_co=<optimized out>,
globals=<optimized out>, locals=locals@entry=0x0, 
    args=args@entry=0x7f198c009060, argcount=<optimized out>,
kws=kws@entry=0x7f198c009060, kwcount=0, defs=0x0, 
    defcount=0, kwdefs=0x0, closure=(<cell at remote 0x7f197ebf9ac8>, <cell at
remote 0x7f197ebf9b28>))
    at Python/ceval.c:4187
#37 0x00007f1997cf5835 in function_call (func=<function at remote
0x7f197ec0ec80>, arg=(), kw={})
    at Objects/funcobject.c:604
--Type <RET> for more, q to quit, c to continue without paging--
#38 0x00007f1997ccb948 in PyObject_Call (func=<function at remote
0x7f197ec0ec80>, args=<optimized out>, 
    kwargs=<optimized out>) at Objects/abstract.c:2261
#39 0x00007f1997d888e7 in do_call_core (kwdict={}, callargs=(), func=<function
at remote 0x7f197ec0ec80>)
    at Python/ceval.c:5120
#40 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at
Python/ceval.c:3404
#41 0x00007f1997d8567f in _PyFunction_FastCall (co=<optimized out>,
args=<optimized out>, nargs=1, 
    globals=<optimized out>) at Python/ceval.c:4933
#42 0x00007f1997d85816 in fast_function (func=<optimized out>, stack=<optimized
out>, nargs=<optimized out>, 
    kwnames=<optimized out>) at Python/ceval.c:4975
#43 0x00007f1997d85955 in call_function
(pp_stack=pp_stack@entry=0x7f194f7fd148, oparg=<optimized out>, 
    kwnames=kwnames@entry=0x0) at Python/ceval.c:4872
#44 0x00007f1997d89ed5 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3335
#45 0x00007f1997d8567f in _PyFunction_FastCall (co=<optimized out>,
args=<optimized out>, nargs=1, 
    globals=<optimized out>) at Python/ceval.c:4933
#46 0x00007f1997d85816 in fast_function (func=<optimized out>, stack=<optimized
out>, nargs=<optimized out>, 
    kwnames=<optimized out>) at Python/ceval.c:4975
#47 0x00007f1997d85955 in call_function
(pp_stack=pp_stack@entry=0x7f194f7fd2e8, oparg=<optimized out>, 
    kwnames=kwnames@entry=0x0) at Python/ceval.c:4872
#48 0x00007f1997d89ed5 in _PyEval_EvalFrameDefault (f=<optimized out>,
throwflag=<optimized out>)
    at Python/ceval.c:3335
#49 0x00007f1997d8567f in _PyFunction_FastCall (co=co@entry=0x7f197edc4e40,
args=<optimized out>, 
    args@entry=0x7f194f7fd490, nargs=nargs@entry=1, 
    globals=globals@entry={'__name__': 'threading', '__doc__': "Thread module
emulating a subset of Java's threading model.", '__package__': '',
'__loader__': <SourceFileLoader(name='threading',
path='/usr/lib64/python3.6/threading.py') at remote 0x7f197ee013c8>,
'__spec__': <ModuleSpec(name='threading', loader=<...>,
origin='/usr/lib64/python3.6/threading.py', loader_state=None,
submodule_search_locations=None, _set_fileattr=True,
_cached='/usr/lib64/python3.6/__pycache__/threading.cpython-36.pyc',
_initializing=False) at remote 0x7f197ee01438>, '__file__':
'/usr/lib64/python3.6/thr--Type <RET> for more, q to quit, c to continue
without paging--
eading.py', '__cached__':
'/usr/lib64/python3.6/__pycache__/threading.cpython-36.pyc', '__builtins__':
{'__name__': 'builtins', '__doc__': "Built-in functions, exceptions, and other
objects.\n\nNoteworthy: None is the `nil' object; Ellipsis represents `...' in
slices.", '__package__': '', '__loader__': <type at remote 0x374dd28>,
'__spec__': <ModuleSpec(name='builtins', loader=<type at remote 0x374dd28>,
origin=None, loader_state=None, submodule_search_loc...(truncated)) at
Python/ceval.c:4933
#50 0x00007f1997d8d870 in _PyFunction_FastCallDict (func=func@entry=<function
at remote 0x7f197eda2f28>, 
    args=args@entry=0x7f194f7fd490, nargs=1, kwargs=kwargs@entry=0x0) at
Python/ceval.c:5035
#51 0x00007f1997ccbb7e in _PyObject_FastCallDict (func=<function at remote
0x7f197eda2f28>, args=0x7f194f7fd490, 
    nargs=<optimized out>, kwargs=0x0) at Objects/abstract.c:2310
#52 0x00007f1997ccbd8c in _PyObject_Call_Prepend (func=<function at remote
0x7f197eda2f28>, obj=<optimized out>, 
    args=(), kwargs=0x0) at Objects/abstract.c:2373
#53 0x00007f1997ccb948 in PyObject_Call (func=<method at remote
0x7f197ee3bac8>, args=<optimized out>, 
    kwargs=<optimized out>) at Objects/abstract.c:2261
#54 0x00007f1997d85f81 in PyEval_CallObjectWithKeywords (func=<optimized out>,
args=<optimized out>, 
    kwargs=<optimized out>) at Python/ceval.c:4771
#55 0x00007f1997dca322 in t_bootstrap (boot_raw=boot_raw@entry=0x7f197ec01508)
at ./Modules/_threadmodule.c:1000
#56 0x00007f1997dc5307 in pythread_wrapper (arg=<optimized out>) at
Python/thread_pthread.h:205
#57 0x00007f1997c416ea in start_thread (arg=0x7f194f7fe700) at
pthread_create.c:477
#58 0x00007f1995bda49f in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:95
...

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot org

--- Comment #4 from Tom Tromey <tromey at sourceware dot org> ---
I was able to reproduce this.
No idea what is going on here.
My stack trace is a bit different:

#3  0x000000000078825d in handle_sigsegv (sig=11)
    at ../../binutils-gdb/gdb/event-top.c:962
#4  <signal handler called>
#5  0x00007f7eb3400731 in _PyUnicode_Ready () from /lib64/libpython3.10.so.1.0
#6  0x00007f7eb3270513 in _PyUnicode_JoinArray.cold ()
   from /lib64/libpython3.10.so.1.0
#7  0x00007f7eb332af01 in PyUnicode_Join () from /lib64/libpython3.10.so.1.0
#8  0x00007f7eb33f9252 in join_list_unicode () from /lib64/libpython3.10.so.1.0
#9  0x00007f7eb3408faa in flush_accumulator () from /lib64/libpython3.10.so.1.0
#10 0x00007f7eb3408f40 in _PyAccu_FinishAsList ()
   from /lib64/libpython3.10.so.1.0
...


Nothing interesting in the various logs.

I wonder if valgrind would say something.

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #5 from Tom Tromey <tromey at sourceware dot org> ---
No failures when running with valgrind.

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at sourceware dot org   |tromey at sourceware dot org

--- Comment #6 from Tom Tromey <tromey at sourceware dot org> ---
Setting PYTHONMALLOC=malloc_debug helped me find this.

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #7 from Tom Tromey <tromey at sourceware dot org> ---
https://sourceware.org/pipermail/gdb-patches/2023-July/201169.html

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |14.1

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

--- Comment #8 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom Tromey <tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=0c8a0b88d18d9c8d6cd52bd1a56d6ab88570f287

commit 0c8a0b88d18d9c8d6cd52bd1a56d6ab88570f287
Author: Tom Tromey <tromey@adacore.com>
Date:   Thu Jul 27 07:54:18 2023 -0600

    Re-acquire GIL earlier in gdbpy_parse_and_eval

    Tom de Vries filed a bug about an intermittent gdb DAP failure -- and
    coincidentally, at the same time, Alexandra Hájková sent email about a
    somewhat similar failure.

    After looking into this for a while (with no results) using ASan and
    valgrind, I found that setting PYTHONMALLOC=malloc_debug found the bug
    instantly.

    The problem is that gdbpy_parse_and_eval releases the GIL while
    calling parse_and_eval, but fails to re-acquire it before calling
    value_to_value_object.  This is easily fixed by introducing a new
    scope.

    I wonder whether the test suite should unconditionally set
    PYTHONMALLOC=malloc_debug.

    Tested-by: Tom de Vries <tdevries@suse.de>
    Reviewed-By: Tom de Vries <tdevries@suse.de>
    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30686

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[Bug dap/30686] [gdb/dap] ERROR: eof reading json header in gdb.dap/cond-bp.exp

[tromey at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30686

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #9 from Tom Tromey <tromey at sourceware dot org> ---
Fixed.

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