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