/* * File source.c - source file handling for internal debugger. * * Copyright (C) 1997, Eric Youngdale. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include <stdio.h> #include <stdlib.h> #include "debugger.h" struct open_file_list { char* path; char* real_path; struct open_file_list* next; unsigned int size; signed int nlines; unsigned int* linelist; }; void source_show_path(void) { const char* ptr; const char* next; dbg_printf("Search list:\n"); for (ptr = dbg_curr_process->search_path; ptr; ptr = next) { next = strchr(ptr, ';'); if (next) dbg_printf("\t%.*s\n", (int)(next++ - ptr), ptr); else dbg_printf("\t%s\n", ptr); } dbg_printf("\n"); } void source_add_path(const char* path) { char* new; unsigned size; size = strlen(path) + 1; if (dbg_curr_process->search_path) { unsigned pos = strlen(dbg_curr_process->search_path) + 1; new = HeapReAlloc(GetProcessHeap(), 0, dbg_curr_process->search_path, pos + size); if (!new) return; new[pos - 1] = ';'; strcpy(&new[pos], path); } else { new = HeapAlloc(GetProcessHeap(), 0, size); if (!new) return; strcpy(new, path); } dbg_curr_process->search_path = new; } void source_nuke_path(struct dbg_process* p) { HeapFree(GetProcessHeap(), 0, p->search_path); p->search_path = NULL; } static void* source_map_file(const char* name, HANDLE* hMap, unsigned* size) { HANDLE hFile; hFile = CreateFileA(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL); if (hFile == INVALID_HANDLE_VALUE) return (void*)-1; if (size != NULL && (*size = GetFileSize(hFile, NULL)) == INVALID_FILE_SIZE) { CloseHandle(hFile); return (void*)-1; } *hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL); CloseHandle(hFile); if (!*hMap) return (void*)-1; return MapViewOfFile(*hMap, FILE_MAP_READ, 0, 0, 0); } static void source_unmap_file(void* addr, HANDLE hMap) { UnmapViewOfFile(addr); CloseHandle(hMap); } static struct open_file_list* source_search_open_file(const char* name) { struct open_file_list* ol; for (ol = dbg_curr_process->source_ofiles; ol; ol = ol->next) { if (strcmp(ol->path, name) == 0) break; } return ol; } static BOOL source_locate_file(const char* srcfile, char* path) { BOOL found = FALSE; if (GetFileAttributesA(srcfile) != INVALID_FILE_ATTRIBUTES) { strcpy(path, srcfile); found = TRUE; } else if (dbg_curr_process->search_path) { const char* spath; spath = srcfile; while (!found) { while (*spath && *spath != '/' && *spath != '\\') spath++; if (!*spath) break; spath++; found = SearchPathA(dbg_curr_process->search_path, spath, NULL, MAX_PATH, path, NULL); } } return found; } static struct open_file_list* source_add_file(const char* name, const char* realpath) { struct open_file_list* ol; size_t sz, nlen; sz = sizeof(*ol); nlen = strlen(name) + 1; if (realpath) sz += strlen(realpath) + 1; ol = HeapAlloc(GetProcessHeap(), 0, sz + nlen); if (!ol) return NULL; strcpy(ol->path = (char*)(ol + 1), name); if (realpath) strcpy(ol->real_path = ol->path + nlen, realpath); else ol->real_path = NULL; ol->next = dbg_curr_process->source_ofiles; ol->nlines = 0; ol->linelist = NULL; ol->size = 0; return dbg_curr_process->source_ofiles = ol; } static int source_display(const char* sourcefile, int start, int end) { char* addr; int i; struct open_file_list* ol; int nlines; const char* basename = NULL; char* pnt; int rtn; HANDLE hMap; char tmppath[MAX_PATH]; /* * First see whether we have the file open already. If so, then * use that, otherwise we have to try and open it. */ ol = source_search_open_file(sourcefile); if (ol == NULL) { /* * Try again, stripping the path from the opened file. */ basename = strrchr(sourcefile, '\\'); if (!basename) basename = strrchr(sourcefile, '/'); if (!basename) basename = sourcefile; else basename++; ol = source_search_open_file(basename); } if (ol == NULL) { /* * Crapola. We need to try and open the file. */ if (!source_locate_file(sourcefile, tmppath)) { if (dbg_interactiveP) { char zbuf[256]; for (;;) { size_t len; /* * Still couldn't find it. Ask user for path to add. */ snprintf(zbuf, sizeof(zbuf), "Enter path to file '%s' (<cr> to end search): ", sourcefile); input_read_line(zbuf, tmppath, sizeof(tmppath)); if (!(len = strlen(tmppath))) break; /* append '/' if missing at the end */ if (tmppath[len - 1] != '/' && tmppath[len - 1] != '\\') tmppath[len++] = '/'; strcpy(&tmppath[len], basename); if (GetFileAttributesA(tmppath) != INVALID_FILE_ATTRIBUTES) break; dbg_printf("Unable to access file '%s'\n", tmppath); } } else { dbg_printf("Unable to access file '%s'\n", sourcefile); tmppath[0] = '\0'; } if (!tmppath[0]) { /* * OK, I guess the user doesn't really want to see it * after all. */ source_add_file(sourcefile, NULL); return FALSE; } } /* * Create header for file. */ ol = source_add_file(sourcefile, tmppath); addr = source_map_file(tmppath, &hMap, &ol->size); if (addr == (char*)-1) return FALSE; /* * Now build up the line number mapping table. */ ol->nlines = 1; pnt = addr; while (pnt < addr + ol->size) { if (*pnt++ == '\n') ol->nlines++; } ol->nlines++; ol->linelist = HeapAlloc(GetProcessHeap(), 0, ol->nlines * sizeof(unsigned int)); nlines = 0; pnt = addr; ol->linelist[nlines++] = 0; while (pnt < addr + ol->size) { if (*pnt++ == '\n') ol->linelist[nlines++] = pnt - addr; } ol->linelist[nlines++] = pnt - addr; } else { addr = source_map_file(ol->real_path, &hMap, NULL); if (addr == (char*)-1) return FALSE; } /* * All we need to do is to display the source lines here. */ rtn = FALSE; for (i = start - 1; i <= end - 1; i++) { char buffer[1024]; if (i < 0 || i >= ol->nlines - 1) continue; rtn = TRUE; memset(&buffer, 0, sizeof(buffer)); if (ol->linelist[i+1] != ol->linelist[i]) { memcpy(&buffer, addr + ol->linelist[i], (ol->linelist[i+1] - ol->linelist[i]) - 1); } dbg_printf("%d\t%s\n", i + 1, buffer); } source_unmap_file(addr, hMap); return rtn; } void source_list(IMAGEHLP_LINE64* src1, IMAGEHLP_LINE64* src2, int delta) { int end; int start; const char* sourcefile; /* * We need to see what source file we need. Hopefully we only have * one specified, otherwise we might as well punt. */ if (src1 && src2 && src1->FileName && src2->FileName && strcmp(src1->FileName, src2->FileName) != 0) { dbg_printf("Ambiguous source file specification.\n"); return; } sourcefile = NULL; if (src1 && src1->FileName) sourcefile = src1->FileName; if (!sourcefile && src2 && src2->FileName) sourcefile = src2->FileName; if (!sourcefile) sourcefile = dbg_curr_process->source_current_file; /* * Now figure out the line number range to be listed. */ start = end = -1; if (src1) start = src1->LineNumber; if (src2) end = src2->LineNumber; if (start == -1 && end == -1) { if (delta < 0) { end = dbg_curr_process->source_start_line; start = end + delta; } else { start = dbg_curr_process->source_end_line; end = start + delta; } } else if (start == -1) start = end + delta; else if (end == -1) end = start + delta; /* * Now call this function to do the dirty work. */ source_display(sourcefile, start, end); if (sourcefile != dbg_curr_process->source_current_file) strcpy(dbg_curr_process->source_current_file, sourcefile); dbg_curr_process->source_start_line = start; dbg_curr_process->source_end_line = end; } void source_list_from_addr(const ADDRESS64* addr, int nlines) { IMAGEHLP_LINE64 il; ADDRESS64 la; DWORD disp; if (!addr) { memory_get_current_pc(&la); addr = &la; } il.SizeOfStruct = sizeof(il); if (SymGetLineFromAddr64(dbg_curr_process->handle, (DWORD_PTR)memory_to_linear_addr(addr), &disp, &il)) source_list(&il, NULL, nlines); } void source_free_files(struct dbg_process* p) { struct open_file_list* ofile; struct open_file_list* ofile_next; for (ofile = p->source_ofiles; ofile; ofile = ofile_next) { ofile_next = ofile->next; HeapFree(GetProcessHeap(), 0, ofile->linelist); HeapFree(GetProcessHeap(), 0, ofile); } }