romenskiy2012/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-06-14 16:05:48 +03:00
Code Issues Projects Releases Packages Wiki Activity

Replace experimental_infallible_new with compile-time flag

Browse source 
The runtime option aborted on every OOM, breaking new(std::nothrow)
semantics. Replace with configure-time --enable-cxx-infallible-new
(default off): when on, throwing new aborts (size logged) and
nothrow returns null; when off, standard new_handler + bad_alloc /
null behavior is preserved. Under LTO the on-path lets the compiler
prove operator new is no-throw.
This commit is contained in:
Slobodan Predolac 2026-06-04 10:58:43 -07:00
parent a6048680a8
commit 160ab9d7f6
19 changed files with 103 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

25
src/jemalloc_cpp.cpp
View file

@ -66,20 +66,20 @@ void operator delete[](
JEMALLOC_NOINLINE
static void *
handleOOM(std::size_t size, bool nothrow) {
if (opt_experimental_infallible_new) {
const char *huge_warning = (size >= ((std::size_t)1 << 30))
? "This may be caused by heap corruption, if the large size "
"is unexpected (suggest building with sanitizers for "
"debugging)."
: "";
safety_check_fail(
"<jemalloc>: Allocation of size %zu failed. "
"%s opt.experimental_infallible_new is true. Aborting.\n",
size, huge_warning);
#ifdef JEMALLOC_INFALLIBLE_NEW
if (nothrow) {
return nullptr;
}
const char *huge_warning = (size >= ((std::size_t)1 << 30))
? "This may be caused by heap corruption, if the large size "
"is unexpected (suggest building with sanitizers for "
"debugging). "
: "";
safety_check_fail(
"<jemalloc>: Allocation of size %zu failed. %sAborting.\n",
size, huge_warning);
return nullptr;
#else
void *ptr = nullptr;
while (ptr == nullptr) {
@ -108,6 +108,7 @@ handleOOM(std::size_t size, bool nothrow) {
#endif
}
return ptr;
#endif
}
template <bool IsNoExcept>