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[njs] Fixed ‘length’ may be used uninitialized in Array.prototype.pop().

Anonymous User
June 28, 2024 10:54PM
details: https://hg.nginx.org/njs/rev/146d4699a4c4
branches:
changeset: 2362:146d4699a4c4
user: Dmitry Volyntsev <xeioex@nginx.com>
date: Thu Jun 20 17:26:14 2024 -0700
description:
Fixed ‘length’ may be used uninitialized in Array.prototype.pop().

When building by GCC with -O3 and -flto flags the following
warning was reported:
src/njs_array.c: In function ‘njs_array_prototype_pop’:
src/njs_array.c:1009:8: error: ‘length’ may be used uninitialized in
this function [-Werror=maybe-uninitialized]
1009 | if (length == 0) {
| ^

Returning a specific code in njs_value_to_number() helps GCC
to infer that there are only 2 return values are possible and
both of them are handled.

diffstat:

src/njs_value_conversion.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diffs (12 lines):

diff -r 8b182df14819 -r 146d4699a4c4 src/njs_value_conversion.h
--- a/src/njs_value_conversion.h Wed Jun 12 23:31:08 2024 -0700
+++ b/src/njs_value_conversion.h Thu Jun 20 17:26:14 2024 -0700
@@ -17,7 +17,7 @@ njs_value_to_number(njs_vm_t *vm, njs_va
if (njs_slow_path(!njs_is_primitive(value))) {
ret = njs_value_to_primitive(vm, &primitive, value, 0);
if (njs_slow_path(ret != NJS_OK)) {
- return ret;
+ return NJS_ERROR;
}

value = &primitive;
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[njs] Fixed ‘length’ may be used uninitialized in Array.prototype.pop().

Anonymous User 134 June 28, 2024 10:54PM



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