common/subdaemon: helpers for dumping memleaks in subdaemons.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -60,3 +60,57 @@ void subdaemon_setup(int argc, char *argv[])
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daemon_setup(argv[0], status_backtrace_print, status_backtrace_exit);
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}
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#if DEVELOPER
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// Indented to avoid header-order check
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#include <backtrace.h>
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#include <common/memleak.h>
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static int dump_syminfo(void *data UNUSED, uintptr_t pc UNUSED,
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const char *filename, int lineno,
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const char *function)
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{
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/* This can happen in backtraces. */
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if (!filename || !function)
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return 0;
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status_trace(" %s:%u (%s)", filename, lineno, function);
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return 0;
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}
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static void dump_leak_backtrace(const uintptr_t *bt)
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{
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if (!bt)
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return;
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/* First one serves as counter. */
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status_trace(" backtrace:");
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for (size_t i = 1; i < bt[0]; i++) {
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backtrace_pcinfo(backtrace_state,
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bt[i], dump_syminfo,
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NULL, NULL);
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}
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}
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bool dump_memleak(struct htable *memtable)
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{
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const tal_t *i;
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const uintptr_t *backtrace;
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bool found_leak = false;
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while ((i = memleak_get(memtable, &backtrace)) != NULL) {
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status_broken("MEMLEAK: %p", i);
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if (tal_name(i))
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status_broken(" label=%s", tal_name(i));
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dump_leak_backtrace(backtrace);
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status_broken(" parents:");
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for (tal_t *p = tal_parent(i); p; p = tal_parent(p)) {
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status_broken(" %s", tal_name(p));
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p = tal_parent(p);
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}
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found_leak = true;
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}
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return found_leak;
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}
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#endif /* DEVELOPER */
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@ -6,4 +6,10 @@
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/* daemon_setup, but for subdaemons */
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void subdaemon_setup(int argc, char *argv[]);
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#if DEVELOPER
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struct htable;
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bool dump_memleak(struct htable *memtable);
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#endif
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#endif /* LIGHTNING_COMMON_SUBDAEMON_H */
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