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lightningd: add dev-memdump command.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2017-12-15 20:46:54 +10:30 • committed by Christian Decker
parent 8c665835fa
commit 95df553813
3 changed files with 66 additions and 2 deletions
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4
Makefile
View file

@ -20,7 +20,7 @@ endif
DEVELOPER := 1
ifeq ($(DEVELOPER),1)
DEV_CFLAGS=-DDEVELOPER=1
DEV_CFLAGS=-DDEVELOPER=1 -DCCAN_TAL_DEBUG=1 -DCCAN_TAKE_DEBUG=1
else
DEV_CFLAGS=-DDEVELOPER=0
endif
@ -143,7 +143,7 @@ ALL_PROGRAMS =
CWARNFLAGS := -Werror -Wall -Wundef -Wmissing-prototypes -Wmissing-declarations -Wstrict-prototypes -Wold-style-definition
CDEBUGFLAGS := -std=gnu11 -g -fstack-protector
CFLAGS = $(CWARNFLAGS) $(CDEBUGFLAGS) -I $(CCANDIR) $(EXTERNAL_INCLUDE_FLAGS) -I . $(FEATURES) $(COVFLAGS) $(DEV_CFLAGS) -DSHACHAIN_BITS=48 -DCCAN_TAKE_DEBUG=1
CFLAGS = $(CWARNFLAGS) $(CDEBUGFLAGS) -I $(CCANDIR) $(EXTERNAL_INCLUDE_FLAGS) -I . $(FEATURES) $(COVFLAGS) $(DEV_CFLAGS) -DSHACHAIN_BITS=48
LDLIBS = -lgmp -lsqlite3 $(COVFLAGS)

1
lightningd/Makefile
View file

@ -66,6 +66,7 @@ LIGHTNINGD_SRC := \
# Source files without corresponding headers
LIGHTNINGD_SRC_NOHDR := \
lightningd/dev_ping.c \
lightningd/memdump.c
LIGHTNINGD_OBJS := $(LIGHTNINGD_SRC:.c=.o) $(LIGHTNINGD_SRC_NOHDR:.c=.o)

63
lightningd/memdump.c Normal file
View file

@ -0,0 +1,63 @@
/* Only possible if we're in developer mode. */
#ifdef DEVELOPER
#include <lightningd/jsonrpc.h>
#include <stdio.h>
static void json_add_ptr(struct json_result *response, const char *name,
const void *ptr)
{
char ptrstr[STR_MAX_CHARS(void *)];
sprintf(ptrstr, "%p", ptr);
json_add_string(response, name, ptrstr);
}
static void add_memdump(struct json_result *response,
const char *name, const tal_t *root,
struct command *cmd)
{
const tal_t *i;
json_array_start(response, name);
for (i = tal_first(root); i; i = tal_next(i)) {
const char *name = tal_name(i);
/* Don't try to dump this command! */
if (i == cmd || i == cmd->jcon)
continue;
/* Don't dump logs, we know they grow. */
if (name && streq(name, "struct log_book"))
continue;
json_object_start(response, NULL);
json_add_ptr(response, "parent", tal_parent(i));
json_add_ptr(response, "value", i);
if (name)
json_add_string(response, "label", name);
if (tal_first(i))
add_memdump(response, "children", i, cmd);
json_object_end(response);
}
json_array_end(response);
}
static void json_memdump(struct command *cmd,
const char *buffer UNNEEDED,
const jsmntok_t *params UNNEEDED)
{
struct json_result *response = new_json_result(cmd);
add_memdump(response, NULL, NULL, cmd);
command_success(cmd, response);
}
static const struct json_command dev_memdump_command = {
"dev-memdump",
json_memdump,
"Dump the memory objects currently used",
"Debugging tool for memory leaks"
};
AUTODATA(json_command, &dev_memdump_command);
#endif /* DEVELOPER */