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MINOR: debug: add a new "debug dev sym" command in expert mode

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This command attempts to resolve a pointer to a symbol name. This is
convenient during development as it's easier to get such pointers live
than by issuing a debugger or calling addr2line.
This commit is contained in:
Willy Tarreau 2021-05-04 18:40:50 +02:00
parent 5ba80d677d
commit 48129be18a
1 changed files with 22 additions and 0 deletions
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22
src/debug.c
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@ -528,6 +528,27 @@ static int debug_parse_cli_hex(char **args, char *payload, struct appctx *appctx
return cli_msg(appctx, LOG_INFO, trash.area);
}
/* parse a "debug dev sym <addr>" command. It always returns 1. */
static int debug_parse_cli_sym(char **args, char *payload, struct appctx *appctx, void *private)
{
unsigned long addr;
if (!cli_has_level(appctx, ACCESS_LVL_ADMIN))
return 1;
if (!*args[3])
return cli_err(appctx, "Missing memory address to be resolved.\n");
_HA_ATOMIC_INC(&debug_commands_issued);
addr = strtoul(args[3], NULL, 0);
chunk_printf(&trash, "%#lx resolves to ", addr);
resolve_sym_name(&trash, NULL, (const void *)addr);
chunk_appendf(&trash, "\n");
return cli_msg(appctx, LOG_INFO, trash.area);
}
/* parse a "debug dev tkill" command. It always returns 1. */
static int debug_parse_cli_tkill(char **args, char *payload, struct appctx *appctx, void *private)
{
@ -1176,6 +1197,7 @@ static struct cli_kw_list cli_kws = {{ },{
{{ "debug", "dev", "panic", NULL }, "debug dev panic : immediately trigger a panic", debug_parse_cli_panic, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "sched", NULL }, "debug dev sched ... : stress the scheduler", debug_parse_cli_sched, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "stream",NULL }, "debug dev stream ... : show/manipulate stream flags", debug_parse_cli_stream,NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "sym", NULL }, "debug dev sym <addr> : resolve symbol address", debug_parse_cli_sym, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "tkill", NULL }, "debug dev tkill [thr] [sig] : send signal to thread", debug_parse_cli_tkill, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "debug", "dev", "write", NULL }, "debug dev write [size] : write that many bytes", debug_parse_cli_write, NULL, NULL, NULL, ACCESS_EXPERT },
{{ "show", "threads", NULL, NULL }, "show threads : show some threads debugging information", NULL, cli_io_handler_show_threads, NULL },