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winedbg: Use tid for other/exec thread operations. 

Looking up the thread makes us loose track of any/all (0/-1) tids, we
need that for correct continue/step implementation.

Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Rémi Bernon 2020-04-01 17:03:25 +02:00 committed by Alexandre Julliard
parent 90e6a52563
commit b434af6637
1 changed files with 41 additions and 35 deletions
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76
programs/winedbg/gdbproxy.c
View File

@ -84,8 +84,8 @@ struct gdb_context
int out_len;
int out_curr_packet;
/* generic GDB thread information */
struct dbg_thread* exec_thread; /* thread used in step & continue */
struct dbg_thread* other_thread; /* thread to be used in any other operation */
int exec_tid; /* tid used in step & continue */
int other_tid; /* tid to be used in any other operation */
/* current Win32 trap env */
unsigned last_sig;
BOOL in_trap;
@ -270,6 +270,23 @@ static inline void cpu_register_hex_from(struct gdb_context *gdbctx,
* =============================================== *
*/
static struct dbg_thread* dbg_thread_from_tid(struct gdb_context* gdbctx, int tid)
{
struct dbg_process *process = gdbctx->process;
struct dbg_thread *thread;
if (!process) return NULL;
if (tid == 0) return dbg_curr_thread;
LIST_FOR_EACH_ENTRY(thread, &process->threads, struct dbg_thread, entry)
{
if (tid > 0 && thread->tid != tid) continue;
return thread;
}
return dbg_curr_thread;
}
static void dbg_thread_set_single_step(struct dbg_thread *thread, BOOL enable)
{
struct backend_cpu *backend;
@ -384,6 +401,8 @@ static void handle_debug_event(struct gdb_context* gdbctx, DEBUG_EVENT* de)
} u;
dbg_curr_thread = dbg_get_thread(gdbctx->process, de->dwThreadId);
gdbctx->exec_tid = de->dwThreadId;
gdbctx->other_tid = de->dwThreadId;
switch (de->dwDebugEventCode)
{
@ -464,8 +483,6 @@ static void handle_debug_event(struct gdb_context* gdbctx, DEBUG_EVENT* de)
de->dwProcessId, de->dwThreadId, de->u.ExitThread.dwExitCode);
assert(dbg_curr_thread);
if (dbg_curr_thread == gdbctx->exec_thread) gdbctx->exec_thread = NULL;
if (dbg_curr_thread == gdbctx->other_thread) gdbctx->other_thread = NULL;
dbg_del_thread(dbg_curr_thread);
break;
@ -865,9 +882,9 @@ static enum packet_return packet_continue(struct gdb_context* gdbctx)
{
/* FIXME: add support for address in packet */
assert(gdbctx->in_packet_len == 0);
if (dbg_curr_thread != gdbctx->exec_thread && gdbctx->exec_thread)
if (gdbctx->exec_tid > 0 && dbg_curr_thread->tid != gdbctx->exec_tid)
FIXME("Can't continue thread %04x while on thread %04x\n",
gdbctx->exec_thread->tid, dbg_curr_thread->tid);
gdbctx->exec_tid, dbg_curr_thread->tid);
resume_debuggee(gdbctx, DBG_CONTINUE);
wait_for_debuggee(gdbctx);
return packet_reply_status(gdbctx);
@ -962,9 +979,9 @@ static enum packet_return packet_verbose_cont(struct gdb_context* gdbctx)
/* Ok, now we have... actionIndex full of actions and we know what threads there are, so all
* that remains is to apply the actions to the threads and the default action to any threads
* left */
if (dbg_curr_thread != gdbctx->exec_thread && gdbctx->exec_thread)
if (gdbctx->exec_tid > 0 && dbg_curr_thread->tid != gdbctx->exec_tid)
FIXME("Can't continue thread %04x while on thread %04x\n",
gdbctx->exec_thread->tid, dbg_curr_thread->tid);
gdbctx->exec_tid, dbg_curr_thread->tid);
/* deal with the threaded stuff first */
for (i = 0; i < actions ; i++)
@ -1073,9 +1090,9 @@ static enum packet_return packet_continue_signal(struct gdb_context* gdbctx)
/* FIXME: add support for address in packet */
assert(gdbctx->in_packet_len == 2);
if (dbg_curr_thread != gdbctx->exec_thread && gdbctx->exec_thread)
if (gdbctx->exec_tid > 0 && dbg_curr_thread->tid != gdbctx->exec_tid)
FIXME("Can't continue thread %04x while on thread %04x\n",
gdbctx->exec_thread->tid, dbg_curr_thread->tid);
gdbctx->exec_tid, dbg_curr_thread->tid);
hex_from(&sig, gdbctx->in_packet, 1);
/* cannot change signals on the fly */
TRACE("sigs: %u %u\n", sig, gdbctx->last_sig);
@ -1094,7 +1111,7 @@ static enum packet_return packet_detach(struct gdb_context* gdbctx)
static enum packet_return packet_read_registers(struct gdb_context* gdbctx)
{
struct dbg_thread *thread = gdbctx->other_thread ? gdbctx->other_thread : dbg_curr_thread;
struct dbg_thread *thread = dbg_thread_from_tid(gdbctx, gdbctx->other_tid);
struct backend_cpu *backend;
dbg_ctx_t ctx;
size_t i;
@ -1118,7 +1135,7 @@ static enum packet_return packet_read_registers(struct gdb_context* gdbctx)
static enum packet_return packet_write_registers(struct gdb_context* gdbctx)
{
struct dbg_thread *thread = gdbctx->other_thread ? gdbctx->other_thread : dbg_curr_thread;
struct dbg_thread *thread = dbg_thread_from_tid(gdbctx, gdbctx->other_tid);
struct backend_cpu *backend;
dbg_ctx_t ctx;
const char *ptr;
@ -1157,28 +1174,16 @@ static enum packet_return packet_kill(struct gdb_context* gdbctx)
static enum packet_return packet_thread(struct gdb_context* gdbctx)
{
char* end;
unsigned thread;
switch (gdbctx->in_packet[0])
{
case 'c':
case 'g':
if (gdbctx->in_packet[1] == '-')
thread = -strtol(gdbctx->in_packet + 2, &end, 16);
else
thread = strtol(gdbctx->in_packet + 1, &end, 16);
if (end == NULL || end > gdbctx->in_packet + gdbctx->in_packet_len)
{
ERR("Failed to parse %s\n",
debugstr_an(gdbctx->in_packet, gdbctx->in_packet_len));
return packet_error;
}
if (gdbctx->in_packet[0] == 'c')
gdbctx->exec_thread = dbg_get_thread(gdbctx->process, thread);
else
gdbctx->other_thread = dbg_get_thread(gdbctx->process, thread);
if (sscanf(gdbctx->in_packet, "c%x", &gdbctx->exec_tid) == 1)
return packet_ok;
return packet_error;
case 'g':
if (sscanf(gdbctx->in_packet, "g%x", &gdbctx->other_tid) == 1)
return packet_ok;
return packet_error;
default:
FIXME("Unknown thread sub-command %c\n", gdbctx->in_packet[0]);
return packet_error;
@ -1259,7 +1264,7 @@ static enum packet_return packet_write_memory(struct gdb_context* gdbctx)
static enum packet_return packet_read_register(struct gdb_context* gdbctx)
{
struct dbg_thread *thread = gdbctx->other_thread ? gdbctx->other_thread : dbg_curr_thread;
struct dbg_thread *thread = dbg_thread_from_tid(gdbctx, gdbctx->other_tid);
struct backend_cpu *backend;
dbg_ctx_t ctx;
size_t reg;
@ -1291,7 +1296,7 @@ static enum packet_return packet_read_register(struct gdb_context* gdbctx)
static enum packet_return packet_write_register(struct gdb_context* gdbctx)
{
struct dbg_thread *thread = gdbctx->other_thread ? gdbctx->other_thread : dbg_curr_thread;
struct dbg_thread *thread = dbg_thread_from_tid(gdbctx, gdbctx->other_tid);
struct backend_cpu *backend;
dbg_ctx_t ctx;
size_t reg;
@ -1670,9 +1675,9 @@ static enum packet_return packet_step(struct gdb_context* gdbctx)
{
/* FIXME: add support for address in packet */
assert(gdbctx->in_packet_len == 0);
if (dbg_curr_thread != gdbctx->exec_thread && gdbctx->exec_thread)
if (gdbctx->exec_tid > 0 && dbg_curr_thread->tid != gdbctx->exec_tid)
FIXME("Can't single-step thread %04x while on thread %04x\n",
gdbctx->exec_thread->tid, dbg_curr_thread->tid);
gdbctx->exec_tid, dbg_curr_thread->tid);
if (dbg_curr_thread) dbg_thread_set_single_step(dbg_curr_thread, TRUE);
resume_debuggee(gdbctx, DBG_CONTINUE);
wait_for_debuggee(gdbctx);
@ -1976,7 +1981,8 @@ static BOOL gdb_init_context(struct gdb_context* gdbctx, unsigned flags, unsigne
gdbctx->out_len = 0;
gdbctx->out_curr_packet = -1;
gdbctx->exec_thread = gdbctx->other_thread = NULL;
gdbctx->exec_tid = -1;
gdbctx->other_tid = -1;
gdbctx->last_sig = 0;
gdbctx->in_trap = FALSE;
gdbctx->process = NULL;