Re: toolchain/54590: running binaries from gdb fails

[christos%zoulas.com@localhost (Christos Zoulas)]

The following reply was made to PR toolchain/54590; it has been noted by GNATS.

From: christos%zoulas.com@localhost (Christos Zoulas)
To: gnats-bugs%netbsd.org@localhost, toolchain-manager%netbsd.org@localhost, 
	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, martin%NetBSD.org@localhost
Cc: 
Subject: Re: toolchain/54590: running binaries from gdb fails
Date: Tue, 1 Oct 2019 14:07:26 -0400

 On Oct 1,  4:45pm, martin%duskware.de@localhost (Martin Husemann) wrote:
 -- Subject: Re: toolchain/54590: running binaries from gdb fails
 
 | The following reply was made to PR toolchain/54590; it has been noted by GNATS.
 | 
 | From: Martin Husemann <martin%duskware.de@localhost>
 | To: gnats-bugs%netbsd.org@localhost
 | Cc: kamil%NetBSD.org@localhost
 | Subject: Re: toolchain/54590: running binaries from gdb fails
 | Date: Tue, 1 Oct 2019 18:44:32 +0200
 | 
 |  Example ktrace for this issue:
 |  
 |   24228      1 gdb      CALL  execve(0xbfffee18,0xbb8b6070,0xbb89fd00)
 |   24228      1 gdb      NAMI  "/usr/pkg/bin/tcsh"
 |   24228      1 gdb      NAMI  "/usr/libexec/ld.elf_so"
 |   24228      1 tcsh     EMUL  "netbsd"
 |    7933      1 gdb      RET   __vfork14 24228/0x5ea4
 |    7933      1 gdb      CALL  __wait450(0x5ea4,0xbfffe18c,0,0)
 |    7933      1 gdb      RET   __wait450 24228/0x5ea4
 |    7933      1 gdb      CALL  ptrace(PT_GET_PROCESS_STATE,0x5ea4,0xbfffe190,8)
 |    7933      1 gdb      RET   ptrace -1 errno 22 Invalid argument
 |  
 |  24228 == 0x5ea4
 |  and sizeof struct ptrace_state should be == 8.
 |  
 |  So I guess sys_ptrace_common.c:701 strikes and I really don't get how this
 |  is supposed to work.
 
 The trap events reported in eventswitch are:
 
         KASSERT((code == TRAP_CHLD) || (code == TRAP_LWP) ||
 		(code == TRAP_EXEC));
 
 But the trap events that can be retrieved in get_process_stats are:
 
             (t->p_sigctx.ps_info._code != TRAP_CHLD &&
 	    t->p_sigctx.ps_info._code != TRAP_LWP)) {
 
 (TRAP_EXEC is missing)
 
 christos