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winedbg: Define table for GDB qXfer command handlers. 

Define a handler lookup table for qXfer commands and use it.

This facilitates implementing more qXfer commands and cacheing reply
data.

Signed-off-by: Jinoh Kang <jinoh.kang.kr@gmail.com>
Signed-off-by: Rémi Bernon <rbernon@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jinoh Kang 2021-11-24 00:11:00 +09:00 committed by Alexandre Julliard
parent 4c01e00dbd
commit 595bfdee71
1 changed files with 99 additions and 34 deletions
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133
programs/winedbg/gdbproxy.c
View File

@ -61,6 +61,9 @@ struct reply_buffer
size_t alloc;
};
#define QX_NAME_SIZE 32
#define QX_ANNEX_SIZE MAX_PATH
struct gdb_context
{
/* gdb information */
@ -87,6 +90,8 @@ struct gdb_context
/* Unix environment */
ULONG_PTR wine_segs[3]; /* load addresses of the ELF wine exec segments (text, bss and data) */
BOOL no_ack_mode;
int qxfer_object_idx;
char qxfer_object_annex[QX_ANNEX_SIZE];
struct reply_buffer qxfer_buffer;
};
@ -813,7 +818,7 @@ static int addr_width(struct gdb_context* gdbctx)
}
enum packet_return {packet_error = 0x00, packet_ok = 0x01, packet_done = 0x02,
packet_last_f = 0x80};
packet_send_buffer = 0x03, packet_last_f = 0x80};
static void packet_reply_hex_to(struct gdb_context* gdbctx, const void* src, int len)
{
@ -1736,11 +1741,16 @@ static BOOL CALLBACK packet_query_libraries_cb(PCSTR mod_name, DWORD64 base, PVO
return TRUE;
}
static void packet_query_libraries(struct gdb_context* gdbctx)
static enum packet_return packet_query_libraries(struct gdb_context* gdbctx)
{
struct reply_buffer* reply = &gdbctx->qxfer_buffer;
BOOL opt;
if (!gdbctx->process) return packet_error;
if (gdbctx->qxfer_object_annex[0])
return packet_reply_error(gdbctx, 0);
/* this will resynchronize builtin dbghelp's internal ELF module list */
SymLoadModule(gdbctx->process->handle, 0, 0, 0, 0, 0);
@ -1749,14 +1759,21 @@ static void packet_query_libraries(struct gdb_context* gdbctx)
SymEnumerateModules64(gdbctx->process->handle, packet_query_libraries_cb, gdbctx);
SymSetExtendedOption(SYMOPT_EX_WINE_NATIVE_MODULES, opt);
reply_buffer_append_str(reply, "</library-list>");
return packet_send_buffer;
}
static void packet_query_threads(struct gdb_context* gdbctx)
static enum packet_return packet_query_threads(struct gdb_context* gdbctx)
{
struct reply_buffer* reply = &gdbctx->qxfer_buffer;
struct dbg_process* process = gdbctx->process;
struct dbg_thread* thread;
if (!process) return packet_error;
if (gdbctx->qxfer_object_annex[0])
return packet_reply_error(gdbctx, 0);
reply_buffer_append_str(reply, "<threads>");
LIST_FOR_EACH_ENTRY(thread, &process->threads, struct dbg_thread, entry)
{
@ -1768,11 +1785,12 @@ static void packet_query_threads(struct gdb_context* gdbctx)
reply_buffer_append_str(reply, "\"/>");
}
reply_buffer_append_str(reply, "</threads>");
return packet_send_buffer;
}
static void packet_query_target_xml(struct gdb_context* gdbctx, struct backend_cpu* cpu)
static void packet_query_target_xml(struct gdb_context* gdbctx, struct reply_buffer* reply, struct backend_cpu* cpu)
{
struct reply_buffer* reply = &gdbctx->qxfer_buffer;
const char* feature_prefix = NULL;
const char* feature = NULL;
char buffer[256];
@ -1886,10 +1904,41 @@ static void packet_query_target_xml(struct gdb_context* gdbctx, struct backend_c
reply_buffer_append_str(reply, "</target>");
}
static enum packet_return packet_query_features(struct gdb_context* gdbctx)
{
struct reply_buffer* reply = &gdbctx->qxfer_buffer;
struct dbg_process* process = gdbctx->process;
if (!process) return packet_error;
if (strncmp(gdbctx->qxfer_object_annex, "target.xml", QX_ANNEX_SIZE) == 0)
{
struct backend_cpu *cpu = process->be_cpu;
if (!cpu) return packet_error;
packet_query_target_xml(gdbctx, reply, cpu);
return packet_send_buffer;
}
return packet_reply_error(gdbctx, 0);
}
struct qxfer
{
const char* name;
enum packet_return (*handler)(struct gdb_context* gdbctx);
} qxfer_handlers[] =
{
{"libraries", packet_query_libraries},
{"threads" , packet_query_threads },
{"features" , packet_query_features },
};
static enum packet_return packet_query(struct gdb_context* gdbctx)
{
char object_name[QX_NAME_SIZE], annex[QX_ANNEX_SIZE];
unsigned int off, len;
struct backend_cpu *cpu;
switch (gdbctx->in_packet[0])
{
@ -1976,11 +2025,16 @@ static enum packet_return packet_query(struct gdb_context* gdbctx)
return packet_ok;
if (strncmp(gdbctx->in_packet, "Supported", 9) == 0)
{
size_t i;
packet_reply_open(gdbctx);
packet_reply_add(gdbctx, "QStartNoAckMode+;");
packet_reply_add(gdbctx, "qXfer:libraries:read+;");
packet_reply_add(gdbctx, "qXfer:threads:read+;");
packet_reply_add(gdbctx, "qXfer:features:read+;");
for (i = 0; i < ARRAY_SIZE(qxfer_handlers); i++)
{
packet_reply_add(gdbctx, "qXfer:");
packet_reply_add(gdbctx, qxfer_handlers[i].name);
packet_reply_add(gdbctx, ":read+;");
}
packet_reply_close(gdbctx);
return packet_done;
}
@ -2011,35 +2065,44 @@ static enum packet_return packet_query(struct gdb_context* gdbctx)
}
break;
case 'X':
if (sscanf(gdbctx->in_packet, "Xfer:libraries:read::%x,%x", &off, &len) == 2)
annex[0] = '\0';
if (sscanf(gdbctx->in_packet, "Xfer:%31[^:]:read::%x,%x", object_name, &off, &len) == 3 ||
sscanf(gdbctx->in_packet, "Xfer:%31[^:]:read:%255[^:]:%x,%x", object_name, annex, &off, &len) == 4)
{
if (!gdbctx->process) return packet_error;
enum packet_return result;
int i;
packet_query_libraries(gdbctx);
packet_reply_xfer(gdbctx, off, len);
for (i = 0; i < ARRAY_SIZE(qxfer_handlers); i++)
{
if (strcmp(qxfer_handlers[i].name, object_name) == 0)
break;
}
if (i >= ARRAY_SIZE(qxfer_handlers))
{
ERR("unhandled qXfer %s read %s %u,%u\n", debugstr_a(object_name), debugstr_a(annex), off, len);
return packet_error;
}
TRACE("qXfer %s read %s %u,%u\n", debugstr_a(object_name), debugstr_a(annex), off, len);
gdbctx->qxfer_object_idx = i;
strcpy(gdbctx->qxfer_object_annex, annex);
result = (*qxfer_handlers[i].handler)(gdbctx);
TRACE("qXfer read result = %d\n", result);
if ((result & ~packet_last_f) == packet_send_buffer)
{
packet_reply_xfer(gdbctx, off, len);
result = (result & packet_last_f) | packet_done;
}
gdbctx->qxfer_object_idx = -1;
gdbctx->qxfer_object_annex[0] = '\0';
reply_buffer_clear(&gdbctx->qxfer_buffer);
return packet_done;
}
if (sscanf(gdbctx->in_packet, "Xfer:threads:read::%x,%x", &off, &len) == 2)
{
if (!gdbctx->process) return packet_error;
packet_query_threads(gdbctx);
packet_reply_xfer(gdbctx, off, len);
reply_buffer_clear(&gdbctx->qxfer_buffer);
return packet_done;
}
if (sscanf(gdbctx->in_packet, "Xfer:features:read:target.xml:%x,%x", &off, &len) == 2)
{
if (!gdbctx->process) return packet_error;
if (!(cpu = gdbctx->process->be_cpu)) return packet_error;
packet_query_target_xml(gdbctx, cpu);
packet_reply_xfer(gdbctx, off, len);
reply_buffer_clear(&gdbctx->qxfer_buffer);
return packet_done;
return result;
}
break;
}
@ -2356,6 +2419,8 @@ static BOOL gdb_init_context(struct gdb_context* gdbctx, unsigned flags, unsigne
for (i = 0; i < ARRAY_SIZE(gdbctx->wine_segs); i++)
gdbctx->wine_segs[i] = 0;
gdbctx->qxfer_object_idx = -1;
memset(gdbctx->qxfer_object_annex, 0, sizeof(gdbctx->qxfer_object_annex));
memset(&gdbctx->qxfer_buffer, 0, sizeof(gdbctx->qxfer_buffer));
/* wait for first trap */