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Februar 2024 um 21:02:54 MEZ hat Pedro Alves Folgendes geschrieben: > On Cygwin, gdb.base/attach.exp exposes that a attach after a > previously failed attach hangs: > > (gdb) PASS: gdb.base/attach.exp: do_attach_failure_tests: attach to digit= s-starting nonsense is prohibited > attach 0 > Can't attach to process 0 (error 2: The system cannot find the file speci= fied.) > (gdb) PASS: gdb.base/attach.exp: do_attach_failure_tests: attach to nonex= istent process is prohibited > attach 10644 > FAIL: gdb.base/attach.exp: do_attach_failure_tests: first attach (timeout= ) > > The problem is that windows_nat_target::attach always returns success > even if the attach fails.=C2=A0 When we return success, the helper thread > begins waiting for events (which will never come), and thus the next > attach deadlocks on the do_synchronously call within > windows_nat_target::attach. > > "run" has the same problem, which is exposed by the new > gdb.base/run-fail-twice.exp testcase: > > (gdb) run > Starting program: .../gdb.base/run-fail-twice/run-fail-twice.nox > Error creating process .../gdb.base/run-fail-twice/run-fail-twice.nox, (e= rror 6: The handle is invalid.) > (gdb) PASS: gdb.base/run-fail-twice.exp: test: bad run 1 > run > Starting program: .../gdb.base/run-fail-twice/run-fail-twice.nox > FAIL: gdb.base/run-fail-twice.exp: test: bad run 2 (timeout) > > The problem here is the same, except that this time it is > windows_nat_target::create_inferior that returns the incorrect result. > > This commit fixes both the "attach" and "run" paths.=C2=A0 The tests > mentioned above now pass on Cygwin. > > Change-Id: I15ec9fa279aff269d4982b00f4ea7c25ae917239 > --- > gdb/windows-nat.c | 15 +++++++++------ > 1 file changed, 9 insertions(+), 6 deletions(-) > > diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c > index b446afd72d8..5d2e23600e3 100644 > --- a/gdb/windows-nat.c > +++ b/gdb/windows-nat.c > @@ -2043,7 +2043,7 @@ windows_nat_target::attach (const char *args, int f= rom_tty) >=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if (!ok) >=C2=A0=C2=A0=C2=A0=C2=A0 err =3D (unsigned) GetLastError (); > > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 return true; > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 return ok; >=C2=A0=C2=A0=C2=A0=C2=A0 }); > >=C2=A0=C2=A0 if (err.has_value ()) > @@ -2642,12 +2642,15 @@ windows_nat_target::create_inferior (const char *= exec_file, >=C2=A0=C2=A0 windows_init_thread_list (); >=C2=A0=C2=A0 do_synchronously ([&] () >=C2=A0=C2=A0=C2=A0=C2=A0 { > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if (!create_process (nullptr, args, flags= , w32_env, > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 inferior_cwd !=3D nullptr ? infcwd : nullptr, > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 disable_randomization, > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 &si, &pi)) > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 BOOL ok =3D create_process (nullptr, args= , flags, w32_env, > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0 inferior_cwd !=3D nullptr ? infcwd : nullptr, > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0 disable_randomization, > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0 &si, &pi); > + > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 if (!ok) >=C2=A0=C2=A0=C2=A0=C2=A0 ret =3D (unsigned) GetLastError (); > -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 return true; > + > +=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 return ok; >=C2=A0=C2=A0=C2=A0=C2=A0 }); > >=C2=A0=C2=A0 if (w32_env) > > -- > 2.43.0 The same problem also exists in the !__CYGWIN__ branch, I ran into this multiple times already. Hannes