Sweden-Number/programs/winedbg/source.c

387 lines
11 KiB
C

/*
* 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.
*/
ol = 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);
}
}