The new 'stack' command displays the openocd C stack from TCL as a
debugging aid. Takes an optional parameter: the depth of the stack
or 'fault' (which creates an immediate segfault by dereferencing
a bad pointer). This demonstrates the new segfault handling nicely.
Signed-off-by: Zachary T Welch <z...@superlucidity.net>
---
src/helper/command.c | 40 ++++++++++++++++++++++++++++++++++++++++
1 files changed, 40 insertions(+), 0 deletions(-)
diff --git a/src/helper/command.c b/src/helper/command.c
index 1cbedae..ca7418b 100644
--- a/src/helper/command.c
+++ b/src/helper/command.c
@@ -42,6 +42,7 @@
#include "log.h"
#include "time_support.h"
#include "jim-eventloop.h"
+#include "stack.h"
/* nice short description of source file */
@@ -1201,6 +1202,36 @@ COMMAND_HANDLER(handle_sleep_command)
return ERROR_OK;
}
+static int stack_command_walker(struct stack_walk_state *state, intptr_t data)
+{
+ struct command_context *cmd_ctx = (struct command_context *)data;
+ command_print(cmd_ctx, "%d: %s", state->level, state->frame);
+ return 0;
+}
+
+COMMAND_HANDLER(handle_stack_command)
+{
+ if (CMD_ARGC > 1)
+ return ERROR_INVALID_ARGUMENTS;
+
+ unsigned depth = 10;
+ if (CMD_ARGC == 1)
+ {
+ if (strcmp(CMD_ARGV[0], "fault") == 0)
+ {
+ long *bad_ptr = (void*)-1;
+ *bad_ptr = 0xDEADBEEF;
+ // unreachable... we should have just caused a crash!
+ LOG_ERROR("unable to fake a segmentation fault?!?!");
+ }
+ COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], depth);
+ if (depth > 200)
+ return ERROR_INVALID_ARGUMENTS;
+ }
+
+ return stack_walk(depth, &stack_command_walker, (intptr_t)CMD_CTX);
+}
+
static const struct command_registration command_subcommand_handlers[] = {
{
.name = "mode",
@@ -1246,6 +1277,15 @@ static const struct command_registration
command_builtin_handlers[] = {
.usage = "<n> [busy]",
},
{
+ .name = "stack",
+ .mode = COMMAND_ANY,
+ .handler = &handle_stack_command,
+ .usage = "[<depth>]",
+ .help = "Display the C stack up to <depth>, with the "
+ "default of 10 and limit of 200.",
+
+ },
+ {
.name = "help",
.handler = &handle_help_command,
.mode = COMMAND_ANY,
--
1.6.4.4
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