1 /* Copyright (C) 2002-2024 Free Software Foundation, Inc. 2 3 This file is part of GDB. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include "dll.h" 19 20 #include <algorithm> 21 22 /* An "unspecified" CORE_ADDR, for match_dll. */ 23 #define UNSPECIFIED_CORE_ADDR (~(CORE_ADDR) 0) 24 25 /* Record a newly loaded DLL at BASE_ADDR for the current process. */ 26 27 void 28 loaded_dll (const char *name, CORE_ADDR base_addr) 29 { 30 loaded_dll (current_process (), name, base_addr); 31 } 32 33 /* Record a newly loaded DLL at BASE_ADDR for PROC. */ 34 35 void 36 loaded_dll (process_info *proc, const char *name, CORE_ADDR base_addr) 37 { 38 gdb_assert (proc != nullptr); 39 proc->all_dlls.emplace_back (name != nullptr ? name : "", base_addr); 40 proc->dlls_changed = true; 41 } 42 43 /* Record that the DLL with NAME and BASE_ADDR has been unloaded 44 from the current process. */ 45 46 void 47 unloaded_dll (const char *name, CORE_ADDR base_addr) 48 { 49 unloaded_dll (current_process (), name, base_addr); 50 } 51 52 /* Record that the DLL with NAME and BASE_ADDR has been unloaded 53 from PROC. */ 54 55 void 56 unloaded_dll (process_info *proc, const char *name, CORE_ADDR base_addr) 57 { 58 gdb_assert (proc != nullptr); 59 auto pred = [&] (const dll_info &dll) 60 { 61 if (base_addr != UNSPECIFIED_CORE_ADDR 62 && base_addr == dll.base_addr) 63 return true; 64 65 if (name != NULL && dll.name == name) 66 return true; 67 68 return false; 69 }; 70 71 auto iter = std::find_if (proc->all_dlls.begin (), proc->all_dlls.end (), 72 pred); 73 74 if (iter == proc->all_dlls.end ()) 75 /* For some inferiors we might get unloaded_dll events without having 76 a corresponding loaded_dll. In that case, the dll cannot be found 77 in ALL_DLL, and there is nothing further for us to do. 78 79 This has been observed when running 32bit executables on Windows64 80 (i.e. through WOW64, the interface between the 32bits and 64bits 81 worlds). In that case, the inferior always does some strange 82 unloading of unnamed dll. */ 83 return; 84 else 85 { 86 /* DLL has been found so remove the entry and free associated 87 resources. */ 88 proc->all_dlls.erase (iter); 89 proc->dlls_changed = true; 90 } 91 } 92 93 void 94 clear_dlls (void) 95 { 96 for_each_process ([] (process_info *proc) 97 { 98 proc->all_dlls.clear (); 99 }); 100 } 101