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8058715: stability issues when being launched as an embedded JVM via JNI

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Use mmap call without MAP_FIXED so we avoid corrupting already allocated memory

Reviewed-by: coleenp, dsimms
This commit is contained in:
David Buck 2014-11-05 23:37:17 -08:00
parent 75778598e2
commit af50fa526b
1 changed files with 1 additions and 1 deletions
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hotspot/src/os_cpu/linux_x86/vm/os_linux_x86.cpp
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@ -910,7 +910,7 @@ void os::workaround_expand_exec_shield_cs_limit() {
*/
char* hint = (char*) (Linux::initial_thread_stack_bottom() -
((StackYellowPages + StackRedPages + 1) * page_size));
char* codebuf = os::reserve_memory(page_size, hint);
char* codebuf = os::attempt_reserve_memory_at(page_size, hint);
if ( (codebuf == NULL) || (!os::commit_memory(codebuf, page_size, true)) ) {
return; // No matter, we tried, best effort.
}