Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

8286198: [linux] Fix process-memory information #126

Changes from all commits
File filter

Filter by extension

Filter by extension

Failed to load comments.
Jump to
Jump to file
Failed to load files.
Diff view
Diff view
@@ -2118,22 +2118,25 @@ void os::Linux::print_process_memory_info(outputStream* st) {
// (note: there is no implementation of mallinfo for muslc)
#ifdef __GLIBC__
size_t total_allocated = 0;
size_t free_retained = 0;
bool might_have_wrapped = false;
if (_mallinfo2 != NULL) {
struct glibc_mallinfo2 mi = _mallinfo2();
total_allocated = mi.uordblks;
total_allocated = mi.uordblks + mi.hblkhd;
free_retained = mi.fordblks;
} else if (_mallinfo != NULL) {
// mallinfo is an old API. Member names mean next to nothing and, beyond that, are int.
// So values may have wrapped around. Still useful enough to see how much glibc thinks
// we allocated.
struct glibc_mallinfo mi = _mallinfo();
total_allocated = (size_t)(unsigned)mi.uordblks;
total_allocated = (size_t)(unsigned)mi.uordblks + (size_t)(unsigned)mi.hblkhd;
free_retained = (size_t)(unsigned)mi.fordblks;
// Since mallinfo members are int, glibc values may have wrapped. Warn about this.
might_have_wrapped = (info.vmrss * K) > UINT_MAX && (info.vmrss * K) > (total_allocated + UINT_MAX);
if (_mallinfo2 != NULL || _mallinfo != NULL) {
st->print_cr("C-Heap outstanding allocations: " SIZE_FORMAT "K%s",
total_allocated / K,
st->print_cr("C-Heap outstanding allocations: " SIZE_FORMAT "K, retained: " SIZE_FORMAT "K%s",
total_allocated / K, free_retained / K,
might_have_wrapped ? " (may have wrapped)" : "");
#endif // __GLIBC__