| 1 | /* Code for native debugging support for GNU/Linux (LWP layer). |
| 2 | |
| 3 | Copyright (C) 2000-2020 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef NAT_LINUX_NAT_H |
| 21 | #define NAT_LINUX_NAT_H |
| 22 | |
| 23 | #include "gdbsupport/function-view.h" |
| 24 | #include "target/waitstatus.h" |
| 25 | |
| 26 | struct lwp_info; |
| 27 | struct arch_lwp_info; |
| 28 | |
| 29 | /* This is the kernel's hard limit. Not to be confused with SIGRTMIN. */ |
| 30 | #ifndef __SIGRTMIN |
| 31 | #define __SIGRTMIN 32 |
| 32 | #endif |
| 33 | |
| 34 | /* Unlike other extended result codes, WSTOPSIG (status) on |
| 35 | PTRACE_O_TRACESYSGOOD syscall events doesn't return SIGTRAP, but |
| 36 | instead SIGTRAP with bit 7 set. */ |
| 37 | #define SYSCALL_SIGTRAP (SIGTRAP | 0x80) |
| 38 | |
| 39 | /* Return the ptid of the current lightweight process. With NPTL |
| 40 | threads and LWPs map 1:1, so this is equivalent to returning the |
| 41 | ptid of the current thread. This function must be provided by |
| 42 | the client. */ |
| 43 | |
| 44 | extern ptid_t current_lwp_ptid (void); |
| 45 | |
| 46 | /* Function type for the CALLBACK argument of iterate_over_lwps. */ |
| 47 | typedef int (iterate_over_lwps_ftype) (struct lwp_info *lwp); |
| 48 | |
| 49 | /* Iterate over all LWPs. Calls CALLBACK with its second argument set |
| 50 | to DATA for every LWP in the list. If CALLBACK returns nonzero for |
| 51 | a particular LWP, return a pointer to the structure describing that |
| 52 | LWP immediately. Otherwise return NULL. This function must be |
| 53 | provided by the client. */ |
| 54 | |
| 55 | extern struct lwp_info *iterate_over_lwps |
| 56 | (ptid_t filter, |
| 57 | gdb::function_view<iterate_over_lwps_ftype> callback); |
| 58 | |
| 59 | /* Return the ptid of LWP. */ |
| 60 | |
| 61 | extern ptid_t ptid_of_lwp (struct lwp_info *lwp); |
| 62 | |
| 63 | /* Set the architecture-specific data of LWP. This function must be |
| 64 | provided by the client. */ |
| 65 | |
| 66 | extern void lwp_set_arch_private_info (struct lwp_info *lwp, |
| 67 | struct arch_lwp_info *info); |
| 68 | |
| 69 | /* Return the architecture-specific data of LWP. This function must |
| 70 | be provided by the client. */ |
| 71 | |
| 72 | extern struct arch_lwp_info *lwp_arch_private_info (struct lwp_info *lwp); |
| 73 | |
| 74 | /* Return nonzero if LWP is stopped, zero otherwise. This function |
| 75 | must be provided by the client. */ |
| 76 | |
| 77 | extern int lwp_is_stopped (struct lwp_info *lwp); |
| 78 | |
| 79 | /* Return the reason the LWP last stopped. This function must be |
| 80 | provided by the client. */ |
| 81 | |
| 82 | extern enum target_stop_reason lwp_stop_reason (struct lwp_info *lwp); |
| 83 | |
| 84 | /* Cause LWP to stop. This function must be provided by the |
| 85 | client. */ |
| 86 | |
| 87 | extern void linux_stop_lwp (struct lwp_info *lwp); |
| 88 | |
| 89 | /* Return nonzero if we are single-stepping this LWP at the ptrace |
| 90 | level. */ |
| 91 | |
| 92 | extern int lwp_is_stepping (struct lwp_info *lwp); |
| 93 | |
| 94 | #endif /* NAT_LINUX_NAT_H */ |