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Correct the actual allocated size from allocator when call sdsRedize to align the logic with sdsnewlen function. #476

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merged 2 commits into from
May 16, 2024
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Correct the actual allocated size from allocator when call sdsRedize to align the logic with sdsnewlen function. #476

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9b30c8a
Correct sds header with actual allocated size.
lipzhu May 9, 2024
41f32de
merge unstable
lipzhu May 15, 2024
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22 changes: 12 additions & 10 deletions src/sds.c
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Original file line number Diff line number Diff line change
Expand Up @@ -349,6 +349,7 @@ sds sdsResize(sds s, size_t size, int would_regrow) {
* type. */
int use_realloc = (oldtype==type || (type < oldtype && type > SDS_TYPE_8));
size_t newlen = use_realloc ? oldhdrlen+size+1 : hdrlen+size+1;
size_t newsize = 0;

if (use_realloc) {
int alloc_already_optimal = 0;
Expand All @@ -357,24 +358,25 @@ sds sdsResize(sds s, size_t size, int would_regrow) {
* We aim to avoid calling realloc() when using Jemalloc if there is no
* change in the allocation size, as it incurs a cost even if the
* allocation size stays the same. */
alloc_already_optimal = (je_nallocx(newlen, 0) == zmalloc_size(sh));
newsize = zmalloc_size(sh);
alloc_already_optimal = (je_nallocx(newlen, 0) == newsize);
#endif
if (!alloc_already_optimal) {
newsh = s_realloc(sh, newlen);
newsh = s_realloc_usable(sh, newlen, &newsize);
if (newsh == NULL) return NULL;
s = (char*)newsh+oldhdrlen;
}
} else {
newsh = s_malloc(newlen);
newsh = s_malloc_usable(newlen, &newsize);
if (newsh == NULL) return NULL;
memcpy((char*)newsh+hdrlen, s, len);
s_free(sh);
s = (char*)newsh+hdrlen;
s[-1] = type;
}
s[len] = 0;
s[len] = '\0';
sdssetlen(s, len);
sdssetalloc(s, size);
sdssetalloc(s, newsize - hdrlen - 1);
return s;
}

Expand Down Expand Up @@ -1470,27 +1472,27 @@ int sdsTest(int argc, char **argv, int flags) {
x = sdsResize(x, 200, 1);
test_cond("sdsrezie() expand len", sdslen(x) == 40);
test_cond("sdsrezie() expand strlen", strlen(x) == 40);
test_cond("sdsrezie() expand alloc", sdsalloc(x) == 200);
test_cond("sdsrezie() expand alloc", sdsalloc(x) >= 200);
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/* Test sdsresize - trim free space */
x = sdsResize(x, 80, 1);
test_cond("sdsrezie() shrink len", sdslen(x) == 40);
test_cond("sdsrezie() shrink strlen", strlen(x) == 40);
test_cond("sdsrezie() shrink alloc", sdsalloc(x) == 80);
test_cond("sdsrezie() shrink alloc", sdsalloc(x) >= 80);
/* Test sdsresize - crop used space */
x = sdsResize(x, 30, 1);
test_cond("sdsrezie() crop len", sdslen(x) == 30);
test_cond("sdsrezie() crop strlen", strlen(x) == 30);
test_cond("sdsrezie() crop alloc", sdsalloc(x) == 30);
test_cond("sdsrezie() crop alloc", sdsalloc(x) >= 30);
/* Test sdsresize - extend to different class */
x = sdsResize(x, 400, 1);
test_cond("sdsrezie() expand len", sdslen(x) == 30);
test_cond("sdsrezie() expand strlen", strlen(x) == 30);
test_cond("sdsrezie() expand alloc", sdsalloc(x) == 400);
test_cond("sdsrezie() expand alloc", sdsalloc(x) >= 400);
/* Test sdsresize - shrink to different class */
x = sdsResize(x, 4, 1);
test_cond("sdsrezie() crop len", sdslen(x) == 4);
test_cond("sdsrezie() crop strlen", strlen(x) == 4);
test_cond("sdsrezie() crop alloc", sdsalloc(x) == 4);
test_cond("sdsrezie() crop alloc", sdsalloc(x) >= 4);
sdsfree(x);
}
return 0;
Expand Down
2 changes: 1 addition & 1 deletion tests/unit/querybuf.tcl
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Original file line number Diff line number Diff line change
Expand Up @@ -33,7 +33,7 @@ start_server {tags {"querybuf slow"}} {

# Check that the initial query buffer is resized after 2 sec
wait_for_condition 1000 10 {
[client_idle_sec test_client] >= 3 && [client_query_buffer test_client] == 0
[client_idle_sec test_client] >= 3 && [client_query_buffer test_client] < $orig_test_client_qbuf
} else {
fail "query buffer was not resized"
}
Expand Down