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8025692: Log what methods are touched at run-time

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Added two diagnostic flags, LogTouchedMethods and PrintTouchedMethodsAtExit to list all methods that have been touched at run time. Added new jcmd, VM.print_touched_methods.

Reviewed-by: acorn, iklam
This commit is contained in:
Yumin Qi 2015-07-15 12:24:41 -07:00
parent 99e5ddaa45
commit 6384ca7b1f
19 changed files with 319 additions and 18 deletions
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4
hotspot/src/share/vm/classfile/symbolTable.cpp
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@ -58,14 +58,14 @@ Symbol* SymbolTable::allocate_symbol(const u1* name, int len, bool c_heap, TRAPS
if (DumpSharedSpaces) {
// Allocate all symbols to CLD shared metaspace
sym = new (len, ClassLoaderData::the_null_class_loader_data(), THREAD) Symbol(name, len, -1);
sym = new (len, ClassLoaderData::the_null_class_loader_data(), THREAD) Symbol(name, len, PERM_REFCOUNT);
} else if (c_heap) {
// refcount starts as 1
sym = new (len, THREAD) Symbol(name, len, 1);
assert(sym != NULL, "new should call vm_exit_out_of_memory if C_HEAP is exhausted");
} else {
// Allocate to global arena
sym = new (len, arena(), THREAD) Symbol(name, len, -1);
sym = new (len, arena(), THREAD) Symbol(name, len, PERM_REFCOUNT);
}
return sym;
}