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improve DEBUG MALLCTL to be able to write to write only fields.

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also support:
  debug mallctl-str thread.tcache.flush VOID
This commit is contained in:
Oran Agra 2020-05-17 15:10:25 +03:00
parent 23a85ba191
commit 5d83e9e1de
1 changed files with 27 additions and 7 deletions
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34
src/debug.c
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@ -311,6 +311,13 @@ void mallctl_int(client *c, robj **argv, int argc) {
size_t sz = sizeof(old);
while (sz > 0) {
if ((ret=je_mallctl(argv[0]->ptr, &old, &sz, argc > 1? &val: NULL, argc > 1?sz: 0))) {
if (ret == EPERM && argc > 1) {
/* if this option is write only, try just writing to it. */
if (!(ret=je_mallctl(argv[0]->ptr, NULL, 0, &val, sz))) {
addReply(c, shared.ok);
return;
}
}
if (ret==EINVAL) {
/* size might be wrong, try a smaller one */
sz /= 2;
@ -333,17 +340,30 @@ void mallctl_int(client *c, robj **argv, int argc) {
}
void mallctl_string(client *c, robj **argv, int argc) {
int ret;
int rret, wret;
char *old;
size_t sz = sizeof(old);
/* for strings, it seems we need to first get the old value, before overriding it. */
if ((ret=je_mallctl(argv[0]->ptr, &old, &sz, NULL, 0))) {
addReplyErrorFormat(c,"%s", strerror(ret));
return;
if ((rret=je_mallctl(argv[0]->ptr, &old, &sz, NULL, 0))) {
/* return error unless this option is write only. */
if (!(rret == EPERM && argc > 1)) {
addReplyErrorFormat(c,"%s", strerror(rret));
return;
}
}
addReplyBulkCString(c, old);
if(argc > 1)
je_mallctl(argv[0]->ptr, NULL, 0, &argv[1]->ptr, sizeof(char*));
if(argc > 1) {
char *val = argv[1]->ptr;
char **valref = &val;
if ((!strcmp(val,"VOID")))
valref = NULL, sz = 0;
wret = je_mallctl(argv[0]->ptr, NULL, 0, valref, sz);
}
if (!rret)
addReplyBulkCString(c, old);
else if (wret)
addReplyErrorFormat(c,"%s", strerror(wret));
else
addReply(c, shared.ok);
}
#endif