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common: lookup function for symnames.

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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2023-04-09 12:55:09 +09:30
parent 3e49cb01bd
commit e514a5d43c
2 changed files with 38 additions and 0 deletions
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34
common/daemon.c
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@@ -38,6 +38,35 @@ void send_backtrace(const char *why)
backtrace_full(backtrace_state, 0, backtrace_status, NULL, NULL);
}
static void extract_symname(void *data, uintptr_t pc,
const char *symname,
uintptr_t symval,
uintptr_t symsize)
{
const char **ret = data;
/* ret is context to alloc off, and value to set */
if (symname)
*ret = tal_strdup(*ret, symname);
else
*ret = NULL;
}
const char *backtrace_symname(const tal_t *ctx, const void *addr)
{
const char *ret = ctx;
if (!backtrace_state)
return tal_fmt(ctx, "%p (backtrace disabled)", addr);
if (!backtrace_syminfo(backtrace_state, (uintptr_t)addr,
extract_symname, NULL, &ret))
ret = NULL;
if (ret)
return ret;
return tal_fmt(ctx, "%p", addr);
}
static void crashdump(int sig)
{
char why[100];
@@ -71,6 +100,11 @@ static void crashlog_activate(void)
void send_backtrace(const char *why)
{
}
const char *backtrace_symname(const tal_t *ctx, const void *addr)
{
return "unknown (backtrace unsupported)";
}
#endif
int daemon_poll(struct pollfd *fds, nfds_t nfds, int timeout)