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wine/programs/winedbg/symbol.c

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/*
* Generate hash tables for Wine debugger symbols
*
* Copyright (C) 1993, Eric Youngdale.
* 2004-2005, Eric Pouech.
*
* 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
*/
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
static BOOL symbol_get_debug_start(const struct dbg_type* func, ULONG64* start)
{
DWORD count, tag;
char buffer[sizeof(TI_FINDCHILDREN_PARAMS) + 256 * sizeof(DWORD)];
TI_FINDCHILDREN_PARAMS* fcp = (TI_FINDCHILDREN_PARAMS*)buffer;
int i;
struct dbg_type child;
if (!func->id) return FALSE; /* native dbghelp not always fills the info field */
if (!types_get_info(func, TI_GET_CHILDRENCOUNT, &count)) return FALSE;
fcp->Start = 0;
while (count)
{
fcp->Count = min(count, 256);
if (types_get_info(func, TI_FINDCHILDREN, fcp))
{
for (i = 0; i < min(fcp->Count, count); i++)
{
child.module = func->module;
child.id = fcp->ChildId[i];
types_get_info(&child, TI_GET_SYMTAG, &tag);
if (tag != SymTagFuncDebugStart) continue;
return types_get_info(&child, TI_GET_ADDRESS, start);
}
count -= min(count, 256);
fcp->Start += 256;
fcp->Start += 256;
}
}
return FALSE;
}
static BOOL fill_sym_lvalue(const SYMBOL_INFO* sym, ULONG_PTR base,
struct dbg_lvalue* lvalue, char* buffer, size_t sz)
{
if (buffer) buffer[0] = '\0';
if (sym->Flags & SYMFLAG_REGISTER)
{
DWORD_PTR* pval;
if (!memory_get_register(sym->Register, &pval, buffer, sz))
return FALSE;
lvalue->cookie = DLV_HOST;
lvalue->addr.Offset = (DWORD_PTR)pval;
}
else if (sym->Flags & SYMFLAG_REGREL)
{
DWORD_PTR* pval;
if (!memory_get_register(sym->Register, &pval, buffer, sz))
return FALSE;
lvalue->cookie = DLV_TARGET;
lvalue->addr.Offset = (ULONG)((ULONG64)*pval + sym->Address);
}
else if (sym->Flags & SYMFLAG_VALUEPRESENT)
{
struct dbg_type type;
VARIANT v;
type.module = sym->ModBase;
type.id = sym->info;
if (!types_get_info(&type, TI_GET_VALUE, &v))
{
if (buffer) snprintf(buffer, sz, "Couldn't get full value information for %s", sym->Name);
return FALSE;
}
else if (v.n1.n2.vt & VT_BYREF)
{
/* FIXME: this won't work for pointers or arrays, as we don't always
* know, if the value to be dereferenced lies in debuggee or
* debugger address space.
*/
if (sym->Tag == SymTagPointerType || sym->Tag == SymTagArrayType)
{
if (buffer) snprintf(buffer, sz, "Couldn't dereference pointer for const value for %s", sym->Name);
return FALSE;
}
/* this is likely Wine's dbghelp which passes const values by reference
* (object is managed by dbghelp, hence in debugger address space)
*/
lvalue->cookie = DLV_HOST;
lvalue->addr.Offset = (DWORD_PTR)sym->Value;
}
else
{
DWORD* pdw = (DWORD*)lexeme_alloc_size(sizeof(*pdw));
lvalue->cookie = DLV_HOST;
lvalue->addr.Offset = (DWORD_PTR)pdw;
*pdw = sym->Value;
}
}
else if (sym->Flags & SYMFLAG_LOCAL)
{
lvalue->cookie = DLV_TARGET;
lvalue->addr.Offset = base + sym->Address;
}
else
{
lvalue->cookie = DLV_TARGET;
lvalue->addr.Offset = sym->Address;
}
lvalue->addr.Mode = AddrModeFlat;
lvalue->type.module = sym->ModBase;
lvalue->type.id = sym->TypeIndex;
return TRUE;
}
struct sgv_data
{
#define NUMDBGV 100
struct
{
/* FIXME: NUMDBGV should be made variable */
struct dbg_lvalue lvalue;
DWORD flags;
DWORD sym_info;
} syms[NUMDBGV]; /* out : will be filled in with various found symbols */
int num; /* out : number of found symbols */
int num_thunks; /* out : number of thunks found */
const char* name; /* in : name of symbol to look up */
unsigned do_thunks : 1; /* in : whether we return thunks tags */
ULONG64 frame_offset; /* in : frame for local & parameter variables look up */
};
static BOOL CALLBACK sgv_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
{
struct sgv_data* sgv = ctx;
unsigned insp;
char tmp[64];
if (sym->Flags & SYMFLAG_THUNK)
{
if (!sgv->do_thunks) return TRUE;
sgv->num_thunks++;
}
if (sgv->num >= NUMDBGV)
{
dbg_printf("Too many addresses for symbol '%s', limiting the first %d\n",
sgv->name, NUMDBGV);
return FALSE;
}
WINE_TRACE("==> %s %s%s%s%s%s%s%s\n",
sym->Name,
(sym->Flags & SYMFLAG_FUNCTION) ? "func " : "",
(sym->Flags & SYMFLAG_FRAMEREL) ? "framerel " : "",
(sym->Flags & SYMFLAG_REGISTER) ? "register " : "",
(sym->Flags & SYMFLAG_REGREL) ? "regrel " : "",
(sym->Flags & SYMFLAG_PARAMETER) ? "param " : "",
(sym->Flags & SYMFLAG_LOCAL) ? "local " : "",
(sym->Flags & SYMFLAG_THUNK) ? "thunk " : "");
/* always keep the thunks at end of the array */
insp = sgv->num;
if (sgv->num_thunks && !(sym->Flags & SYMFLAG_THUNK))
{
insp -= sgv->num_thunks;
memmove(&sgv->syms[insp + 1], &sgv->syms[insp],
sizeof(sgv->syms[0]) * sgv->num_thunks);
}
if (!fill_sym_lvalue(sym, sgv->frame_offset, &sgv->syms[insp].lvalue, tmp, sizeof(tmp)))
{
dbg_printf("%s: %s\n", sym->Name, tmp);
return TRUE;
}
sgv->syms[insp].flags = sym->Flags;
sgv->syms[insp].sym_info = sym->info;
sgv->num++;
return TRUE;
}
enum sym_get_lval symbol_picker_interactive(const char* name, const struct sgv_data* sgv,
struct dbg_lvalue* rtn)
{
char buffer[512];
unsigned i;
if (!dbg_interactiveP)
{
dbg_printf("More than one symbol named %s, picking the first one\n", name);
*rtn = sgv->syms[0].lvalue;
return sglv_found;
}
dbg_printf("Many symbols with name '%s', "
"choose the one you want (<cr> to abort):\n", name);
for (i = 0; i < sgv->num; i++)
{
if (sgv->num - sgv->num_thunks > 1 && (sgv->syms[i].flags & SYMFLAG_THUNK) && !DBG_IVAR(AlwaysShowThunks))
continue;
dbg_printf("[%d]: ", i + 1);
if (sgv->syms[i].flags & SYMFLAG_LOCAL)
{
dbg_printf("%s %sof %s\n",
sgv->syms[i].flags & SYMFLAG_PARAMETER ? "Parameter" : "Local variable",
sgv->syms[i].flags & (SYMFLAG_REGISTER|SYMFLAG_REGREL) ? "(in a register) " : "",
name);
}
else if (sgv->syms[i].flags & SYMFLAG_THUNK)
{
print_address(&sgv->syms[i].lvalue.addr, TRUE);
/* FIXME: should display where the thunks points to */
dbg_printf(" thunk %s\n", name);
}
else
{
print_address(&sgv->syms[i].lvalue.addr, TRUE);
dbg_printf("\n");
}
}
do
{
i = 0;
if (input_read_line("=> ", buffer, sizeof(buffer)))
{
if (buffer[0] == '\0') return sglv_aborted;
i = atoi(buffer);
if (i < 1 || i > sgv->num)
dbg_printf("Invalid choice %d\n", i);
}
else return sglv_aborted;
} while (i < 1 || i > sgv->num);
/* The array is 0-based, but the choices are 1..n,
* so we have to subtract one before returning.
*/
*rtn = sgv->syms[i - 1].lvalue;
return sglv_found;
}
enum sym_get_lval symbol_picker_scoped(const char* name, const struct sgv_data* sgv,
struct dbg_lvalue* rtn)
{
unsigned i;
int local = -1;
for (i = 0; i < sgv->num; i++)
{
if (sgv->num - sgv->num_thunks > 1 && (sgv->syms[i].flags & SYMFLAG_THUNK) && !DBG_IVAR(AlwaysShowThunks))
continue;
if (sgv->syms[i].flags & SYMFLAG_LOCAL)
{
if (local == -1)
local = i;
else
{
/* FIXME: several locals with same name... which one to pick ?? */
dbg_printf("Several local variables/parameters for %s, aborting\n", name);
return sglv_aborted;
}
}
}
if (local != -1)
{
*rtn = sgv->syms[local].lvalue;
return sglv_found;
}
/* no locals found, multiple globals... abort for now */
dbg_printf("Several global variables for %s, aborting\n", name);
return sglv_aborted;
}
symbol_picker_t symbol_current_picker = symbol_picker_interactive;
/***********************************************************************
* symbol_get_lvalue
*
* Get the address of a named symbol.
* Return values:
* sglv_found: if the symbol is found
* sglv_unknown: if the symbol isn't found
* sglv_aborted: some error occurred (likely, many symbols of same name exist,
* and user didn't pick one of them)
*/
enum sym_get_lval symbol_get_lvalue(const char* name, const int lineno,
struct dbg_lvalue* rtn, BOOL bp_disp)
{
struct sgv_data sgv;
int i;
char buffer[512];
DWORD opt;
IMAGEHLP_STACK_FRAME ihsf;
if (strlen(name) + 4 > sizeof(buffer))
{
WINE_WARN("Too long symbol (%s)\n", name);
return sglv_unknown;
}
sgv.num = 0;
sgv.num_thunks = 0;
sgv.name = &buffer[2];
sgv.do_thunks = DBG_IVAR(AlwaysShowThunks);
if (strchr(name, '!'))
{
strcpy(buffer, name);
}
else
{
buffer[0] = '*';
buffer[1] = '!';
strcpy(&buffer[2], name);
}
/* this is a wine specific options to return also ELF modules in the
* enumeration
*/
SymSetOptions((opt = SymGetOptions()) | 0x40000000);
SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv);
if (!sgv.num)
{
const char* ptr = strchr(name, '!');
if ((ptr && ptr[1] != '_') || (!ptr && *name != '_'))
{
if (ptr)
{
int offset = ptr - name;
memcpy(buffer, name, offset + 1);
buffer[offset + 1] = '_';
strcpy(&buffer[offset + 2], ptr + 1);
}
else
{
buffer[0] = '*';
buffer[1] = '!';
buffer[2] = '_';
strcpy(&buffer[3], name);
}
SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv);
}
}
SymSetOptions(opt);
/* now grab local symbols */
if (stack_get_current_frame(&ihsf) && sgv.num < NUMDBGV)
{
sgv.frame_offset = ihsf.FrameOffset;
SymEnumSymbols(dbg_curr_process->handle, 0, name, sgv_cb, (void*)&sgv);
}
if (!sgv.num)
{
dbg_printf("No symbols found for %s\n", name);
return sglv_unknown;
}
/* recompute potential offsets for functions (linenumber, skip prolog) */
for (i = 0; i < sgv.num; i++)
{
if (sgv.syms[i].flags & (SYMFLAG_REGISTER|SYMFLAG_REGREL|SYMFLAG_LOCAL|SYMFLAG_THUNK))
continue;
if (lineno == -1)
{
struct dbg_type type;
ULONG64 addr;
type.module = sgv.syms[i].lvalue.type.module;
type.id = sgv.syms[i].sym_info;
if (bp_disp && symbol_get_debug_start(&type, &addr))
sgv.syms[i].lvalue.addr.Offset = addr;
}
else
{
DWORD disp;
IMAGEHLP_LINE64 il;
BOOL found = FALSE;
il.SizeOfStruct = sizeof(il);
SymGetLineFromAddr64(dbg_curr_process->handle,
(DWORD_PTR)memory_to_linear_addr(&sgv.syms[i].lvalue.addr),
&disp, &il);
do
{
if (lineno == il.LineNumber)
{
sgv.syms[i].lvalue.addr.Offset = il.Address;
found = TRUE;
break;
}
} while (SymGetLineNext64(dbg_curr_process->handle, &il));
if (!found)
WINE_FIXME("No line (%d) found for %s (setting to symbol start)\n",
lineno, name);
}
}
if (sgv.num - sgv.num_thunks > 1 || /* many symbols non thunks (and showing only non thunks) */
(sgv.num > 1 && DBG_IVAR(AlwaysShowThunks)) || /* many symbols (showing symbols & thunks) */
(sgv.num == sgv.num_thunks && sgv.num_thunks > 1))
{
return symbol_current_picker(name, &sgv, rtn);
}
/* first symbol is the one we want:
* - only one symbol found,
* - or many symbols but only one non thunk when AlwaysShowThunks is FALSE
*/
*rtn = sgv.syms[0].lvalue;
return sglv_found;
}
BOOL symbol_is_local(const char* name)
{
struct sgv_data sgv;
IMAGEHLP_STACK_FRAME ihsf;
sgv.num = 0;
sgv.num_thunks = 0;
sgv.name = name;
sgv.do_thunks = FALSE;
if (stack_get_current_frame(&ihsf))
{
sgv.frame_offset = ihsf.FrameOffset;
SymEnumSymbols(dbg_curr_process->handle, 0, name, sgv_cb, (void*)&sgv);
}
return sgv.num > 0;
}
/***********************************************************************
* symbol_read_symtable
*
* Read a symbol file into the hash table.
*/
void symbol_read_symtable(const char* filename, unsigned long offset)
{
dbg_printf("No longer supported\n");
#if 0
/* FIXME: have to implement SymAddSymbol in dbghelp, but likely we'll need to link
* this with an already loaded module !!
*/
FILE* symbolfile;
unsigned addr;
char type;
char* cpnt;
char buffer[256];
char name[256];
if (!(symbolfile = fopen(filename, "r")))
{
WINE_WARN("Unable to open symbol table %s\n", filename);
return;
}
dbg_printf("Reading symbols from file %s\n", filename);
while (1)
{
fgets(buffer, sizeof(buffer), symbolfile);
if (feof(symbolfile)) break;
/* Strip any text after a # sign (i.e. comments) */
cpnt = strchr(buffer, '#');
if (cpnt) *cpnt = '\0';
/* Quietly ignore any lines that have just whitespace */
for (cpnt = buffer; *cpnt; cpnt++)
{
if (*cpnt != ' ' && *cpnt != '\t') break;
}
if (!*cpnt || *cpnt == '\n') continue;
if (sscanf(buffer, "%lx %c %s", &addr, &type, name) == 3)
{
if (value.addr.off + offset < value.addr.off)
WINE_WARN("Address wrap around\n");
value.addr.off += offset;
SymAddSymbol(current_process->handle, BaseOfDll,
name, addr, 0, 0);
}
}
fclose(symbolfile);
#endif
}
/***********************************************************************
* symbol_get_function_line_status
*
* Find the symbol nearest to a given address.
*/
enum dbg_line_status symbol_get_function_line_status(const ADDRESS64* addr)
{
IMAGEHLP_LINE64 il;
DWORD disp;
ULONG64 disp64, start;
DWORD_PTR lin = (DWORD_PTR)memory_to_linear_addr(addr);
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* sym = (SYMBOL_INFO*)buffer;
struct dbg_type func;
il.SizeOfStruct = sizeof(il);
sym->SizeOfStruct = sizeof(SYMBOL_INFO);
sym->MaxNameLen = sizeof(buffer) - sizeof(SYMBOL_INFO);
/* do we have some info for lin address ? */
if (!SymFromAddr(dbg_curr_process->handle, lin, &disp64, sym))
return dbg_no_line_info;
switch (sym->Tag)
{
case SymTagThunk:
/* FIXME: so far dbghelp doesn't return the 16 <=> 32 thunks
* and furthermore, we no longer take care of them !!!
*/
return dbg_in_a_thunk;
case SymTagFunction:
case SymTagPublicSymbol: break;
default:
WINE_FIXME("Unexpected sym-tag 0x%08x\n", sym->Tag);
case SymTagData:
return dbg_no_line_info;
}
/* we should have a function now */
if (!SymGetLineFromAddr64(dbg_curr_process->handle, lin, &disp, &il))
return dbg_no_line_info;
func.module = sym->ModBase;
func.id = sym->info;
if (symbol_get_debug_start(&func, &start) && lin < start)
return dbg_not_on_a_line_number;
if (!sym->Size) sym->Size = 0x100000;
if (il.FileName && il.FileName[0] && disp < sym->Size)
return (disp == 0) ? dbg_on_a_line_number : dbg_not_on_a_line_number;
return dbg_no_line_info;
}
/***********************************************************************
* symbol_get_line
*
* Find the symbol nearest to a given address.
* Returns sourcefile name and line number in a format that the listing
* handler can deal with.
*/
BOOL symbol_get_line(const char* filename, const char* name,
IMAGEHLP_LINE64* line)
{
struct sgv_data sgv;
char buffer[512];
DWORD opt, disp;
unsigned i, found = FALSE;
IMAGEHLP_LINE64 il;
sgv.num = 0;
sgv.num_thunks = 0;
sgv.name = &buffer[2];
sgv.do_thunks = FALSE;
buffer[0] = '*';
buffer[1] = '!';
strcpy(&buffer[2], name);
/* this is a wine specific options to return also ELF modules in the
* enumeration
*/
SymSetOptions((opt = SymGetOptions()) | 0x40000000);
if (!SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv))
{
SymSetOptions(opt);
return FALSE;
}
if (!sgv.num && (name[0] != '_'))
{
buffer[2] = '_';
strcpy(&buffer[3], name);
if (!SymEnumSymbols(dbg_curr_process->handle, 0, buffer, sgv_cb, (void*)&sgv))
{
SymSetOptions(opt);
return FALSE;
}
}
SymSetOptions(opt);
for (i = 0; i < sgv.num; i++)
{
DWORD_PTR linear = (DWORD_PTR)memory_to_linear_addr(&sgv.syms[i].lvalue.addr);
il.SizeOfStruct = sizeof(il);
if (!SymGetLineFromAddr64(dbg_curr_process->handle, linear, &disp, &il))
continue;
if (filename && strcmp(il.FileName, filename)) continue;
if (found)
{
WINE_FIXME("Several found, returning first (may not be what you want)...\n");
break;
}
found = TRUE;
*line = il;
}
if (!found)
{
if (filename) dbg_printf("No such function %s in %s\n", name, filename);
else dbg_printf("No such function %s\n", name);
return FALSE;
}
return TRUE;
}
/******************************************************************
* symbol_print_local
*
* Overall format is:
* <name>=<value> in non detailed form
* <name>=<value> (local|pmt <where>) in detailed form
* Note <value> can be an error message in case of error
*/
void symbol_print_local(const SYMBOL_INFO* sym, ULONG_PTR base, BOOL detailed)
{
struct dbg_lvalue lvalue;
char buffer[64];
dbg_printf("%s=", sym->Name);
if (fill_sym_lvalue(sym, base, &lvalue, buffer, sizeof(buffer)))
{
print_value(&lvalue, 0, 1);
if (detailed)
dbg_printf(" (%s%s)",
(sym->Flags & SYMFLAG_PARAMETER) ? "parameter" : "local",
buffer);
}
else
{
dbg_printf("%s", buffer);
if (detailed)
dbg_printf(" (%s)",
(sym->Flags & SYMFLAG_PARAMETER) ? "parameter" : "local");
}
}
static BOOL CALLBACK info_locals_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
{
struct dbg_type type;
dbg_printf("\t");
type.module = sym->ModBase;
type.id = sym->TypeIndex;
types_print_type(&type, FALSE);
dbg_printf(" ");
symbol_print_local(sym, (ULONG_PTR)ctx, TRUE);
dbg_printf("\n");
return TRUE;
}
int symbol_info_locals(void)
{
IMAGEHLP_STACK_FRAME ihsf;
ADDRESS64 addr;
stack_get_current_frame(&ihsf);
addr.Mode = AddrModeFlat;
addr.Offset = ihsf.InstructionOffset;
print_address(&addr, FALSE);
dbg_printf(": (%08lx)\n", (DWORD_PTR)ihsf.FrameOffset);
SymEnumSymbols(dbg_curr_process->handle, 0, NULL, info_locals_cb, (void*)(DWORD_PTR)ihsf.FrameOffset);
return TRUE;
}
static BOOL CALLBACK symbols_info_cb(PSYMBOL_INFO sym, ULONG size, PVOID ctx)
{
struct dbg_type type;
IMAGEHLP_MODULE mi;
mi.SizeOfStruct = sizeof(mi);
if (!SymGetModuleInfo(dbg_curr_process->handle, sym->ModBase, &mi))
mi.ModuleName[0] = '\0';
else
{
size_t len = strlen(mi.ModuleName);
if (len > 5 && !strcmp(mi.ModuleName + len - 5, "<elf>"))
mi.ModuleName[len - 5] = '\0';
}
dbg_printf("%08lx: %s!%s", (ULONG_PTR)sym->Address, mi.ModuleName, sym->Name);
type.id = sym->TypeIndex;
type.module = sym->ModBase;
if (sym->TypeIndex != dbg_itype_none && sym->TypeIndex != 0)
{
dbg_printf(" ");
types_print_type(&type, FALSE);
}
dbg_printf("\n");
return TRUE;
}
void symbol_info(const char* str)
{
char buffer[512];
DWORD opt;
if (strlen(str) + 3 >= sizeof(buffer))
{
dbg_printf("Symbol too long (%s)\n", str);
return;
}
buffer[0] = '*';
buffer[1] = '!';
strcpy(&buffer[2], str);
/* this is a wine specific options to return also ELF modules in the
* enumeration
*/
SymSetOptions((opt = SymGetOptions()) | 0x40000000);
SymEnumSymbols(dbg_curr_process->handle, 0, buffer, symbols_info_cb, NULL);
SymSetOptions(opt);
}
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