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7199092: NMT: NMT needs to deal overlapped virtual memory ranges

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Enhanced virtual memory tracking to track committed regions as well as reserved regions, so NMT now can generate virtual memory map.

Reviewed-by: acorn, coleenp
This commit is contained in:
Zhengyu Gu 2012-10-19 21:40:07 -04:00
parent 240b5c9329
commit 3e481cdd81
29 changed files with 800 additions and 364 deletions
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4
hotspot/src/os/solaris/vm/os_solaris.cpp
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@ -55,6 +55,7 @@
#include "runtime/threadCritical.hpp"
#include "runtime/timer.hpp"
#include "services/attachListener.hpp"
#include "services/memTracker.hpp"
#include "services/runtimeService.hpp"
#include "thread_solaris.inline.hpp"
#include "utilities/decoder.hpp"
@ -3072,11 +3073,12 @@ char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) {
// Since snv_84, Solaris attempts to honor the address hint - see 5003415.
// Give it a try, if the kernel honors the hint we can return immediately.
char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false);
volatile int err = errno;
if (addr == requested_addr) {
return addr;
} else if (addr != NULL) {
unmap_memory(addr, bytes);
pd_unmap_memory(addr, bytes);
}
if (PrintMiscellaneous && Verbose) {