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winedbg: Use gdb's default handling of breakpoints. 

We're essentially doing the same thing, so there's no reason not to leave
the handling entirely to gdb.

Signed-off-by: Zebediah Figura <z.figura12@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
oldstable
Zebediah Figura 2018-05-18 08:51:22 -05:00 committed by Alexandre Julliard
parent ca313f57b1
commit a602405efd
1 changed files with 2 additions and 127 deletions
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129
programs/winedbg/gdbproxy.c
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@ -72,13 +72,6 @@
#define GDBPXY_TRC_WIN32_ERROR 0x20
#define GDBPXY_TRC_COMMAND_FIXME 0x80
struct gdb_ctx_Xpoint
{
enum be_xpoint_type type; /* (-1) == be_xpoint_free means free */
void* addr;
unsigned long val;
};
struct gdb_context
{
/* gdb information */
@ -105,8 +98,6 @@ struct gdb_context
CONTEXT context;
/* Win32 information */
struct dbg_process* process;
#define NUM_XPOINT 32
struct gdb_ctx_Xpoint Xpoints[NUM_XPOINT];
/* Unix environment */
unsigned long wine_segs[3]; /* load addresses of the ELF wine exec segments (text, bss and data) */
};
@ -1570,28 +1561,6 @@ static enum packet_return packet_thread(struct gdb_context* gdbctx)
}
}
static BOOL read_memory(struct gdb_context *gdbctx, char *addr, char *buffer, SIZE_T blk_len, SIZE_T *r)
{
/* Wrapper around process_io->read() that replaces values displaced by breakpoints. */
BOOL ret;
ret = gdbctx->process->process_io->read(gdbctx->process->handle, addr, buffer, blk_len, r);
if (ret)
{
struct gdb_ctx_Xpoint *xpt;
for (xpt = &gdbctx->Xpoints[NUM_XPOINT - 1]; xpt >= gdbctx->Xpoints; xpt--)
{
char *xpt_addr = xpt->addr;
if (xpt->type != be_xpoint_free && xpt_addr >= addr && xpt_addr < addr + blk_len)
buffer[xpt_addr - addr] = xpt->val;
}
}
return ret;
}
static enum packet_return packet_read_memory(struct gdb_context* gdbctx)
{
char *addr;
@ -1608,7 +1577,8 @@ static enum packet_return packet_read_memory(struct gdb_context* gdbctx)
for (nread = 0; nread < len; nread += r, addr += r)
{
blk_len = min(sizeof(buffer), len - nread);
if (!read_memory(gdbctx, addr, buffer, blk_len, &r) || r == 0)
if (!gdbctx->process->process_io->read(gdbctx->process->handle, addr,
buffer, blk_len, &r) || r == 0)
{
/* fail at first address, return error */
if (nread == 0) return packet_reply_error(gdbctx, EFAULT);
@ -2163,97 +2133,6 @@ static enum packet_return packet_thread_alive(struct gdb_context* gdbctx)
return packet_reply_error(gdbctx, ESRCH);
}
static enum packet_return packet_remove_breakpoint(struct gdb_context* gdbctx)
{
void* addr;
unsigned len;
struct gdb_ctx_Xpoint* xpt;
enum be_xpoint_type t;
/* FIXME: check packet_len */
if (gdbctx->in_packet[0] < '0' || gdbctx->in_packet[0] > '4' ||
gdbctx->in_packet[1] != ',' ||
sscanf(gdbctx->in_packet + 2, "%p,%x", &addr, &len) != 2)
return packet_error;
if (gdbctx->trace & GDBPXY_TRC_COMMAND)
fprintf(stderr, "Remove bp %p[%u] typ=%c\n",
addr, len, gdbctx->in_packet[0]);
switch (gdbctx->in_packet[0])
{
case '0': t = be_xpoint_break; len = 0; break;
case '1': t = be_xpoint_watch_exec; break;
case '2': t = be_xpoint_watch_read; break;
case '3': t = be_xpoint_watch_write; break;
default: return packet_error;
}
for (xpt = &gdbctx->Xpoints[NUM_XPOINT - 1]; xpt >= gdbctx->Xpoints; xpt--)
{
if (xpt->addr == addr && xpt->type == t)
{
if (be_cpu->remove_Xpoint(gdbctx->process->handle,
gdbctx->process->process_io, &gdbctx->context,
t, xpt->addr, xpt->val, len))
{
xpt->type = be_xpoint_free;
return packet_ok;
}
break;
}
}
return packet_error;
}
static enum packet_return packet_set_breakpoint(struct gdb_context* gdbctx)
{
void* addr;
unsigned len;
struct gdb_ctx_Xpoint* xpt;
enum be_xpoint_type t;
/* FIXME: check packet_len */
if (gdbctx->in_packet[0] < '0' || gdbctx->in_packet[0] > '4' ||
gdbctx->in_packet[1] != ',' ||
sscanf(gdbctx->in_packet + 2, "%p,%x", &addr, &len) != 2)
return packet_error;
if (gdbctx->trace & GDBPXY_TRC_COMMAND)
fprintf(stderr, "Set bp %p[%u] typ=%c\n",
addr, len, gdbctx->in_packet[0]);
switch (gdbctx->in_packet[0])
{
case '0': t = be_xpoint_break; len = 0; break;
case '1': t = be_xpoint_watch_exec; break;
case '2': t = be_xpoint_watch_read; break;
case '3': t = be_xpoint_watch_write; break;
default: return packet_error;
}
/* because of packet command handling, this should be made idempotent */
for (xpt = &gdbctx->Xpoints[NUM_XPOINT - 1]; xpt >= gdbctx->Xpoints; xpt--)
{
if (xpt->addr == addr && xpt->type == t)
return packet_ok; /* nothing to do */
}
/* really set the Xpoint */
for (xpt = &gdbctx->Xpoints[NUM_XPOINT - 1]; xpt >= gdbctx->Xpoints; xpt--)
{
if (xpt->type == be_xpoint_free)
{
if (be_cpu->insert_Xpoint(gdbctx->process->handle,
gdbctx->process->process_io, &gdbctx->context,
t, addr, &xpt->val, len))
{
xpt->addr = addr;
xpt->type = t;
return packet_ok;
}
fprintf(stderr, "cannot set xpoint\n");
break;
}
}
/* no more entries... eech */
fprintf(stderr, "Running out of spots for {break|watch}points\n");
return packet_error;
}
/* =============================================== *
* P A C K E T I N F R A S T R U C T U R E *
* =============================================== *
@ -2287,8 +2166,6 @@ static struct packet_entry packet_entries[] =
/*{'S', packet_step_signal}, hard(er) to implement */
{'T', packet_thread_alive},
{'v', packet_verbose},
{'z', packet_remove_breakpoint},
{'Z', packet_set_breakpoint},
};
static BOOL extract_packets(struct gdb_context* gdbctx)
@ -2578,8 +2455,6 @@ static BOOL gdb_init_context(struct gdb_context* gdbctx, unsigned flags, unsigne
gdbctx->in_trap = FALSE;
gdbctx->trace = /*GDBPXY_TRC_PACKET | GDBPXY_TRC_COMMAND |*/ GDBPXY_TRC_COMMAND_ERROR | GDBPXY_TRC_COMMAND_FIXME | GDBPXY_TRC_WIN32_EVENT;
gdbctx->process = NULL;
for (i = 0; i < NUM_XPOINT; i++)
gdbctx->Xpoints[i].type = -1;
for (i = 0; i < sizeof(gdbctx->wine_segs) / sizeof(gdbctx->wine_segs[0]); i++)
gdbctx->wine_segs[i] = 0;