stan/jdk-24
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

8265606: Reduce allocations in AdapterHandlerLibrary::get_adapter

Browse Source 
Reviewed-by: iklam
This commit is contained in:
Claes Redestad 2021-04-23 13:04:48 +00:00
parent bfc1cd8eaf
commit 891f72fe6e
1 changed files with 12 additions and 5 deletions

17
src/hotspot/share/runtime/sharedRuntime.cpp

@ -2662,8 +2662,9 @@ AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& meth
// Fill in the signature array, for the calling-convention call.
int total_args_passed = method->size_of_parameters(); // All args on stack
BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
BasicType stack_sig_bt[16];
BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
int i = 0;
if (!method->is_static()) // Pass in receiver first
sig_bt[i++] = T_OBJECT;
@ -2690,6 +2691,9 @@ AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(const methodHandle& meth
return entry;
}
VMRegPair stack_regs[16];
VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
// Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage
int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed);
@ -2885,9 +2889,12 @@ void AdapterHandlerLibrary::create_native_wrapper(const methodHandle& method) {
// Fill in the signature array, for the calling-convention call.
const int total_args_passed = method->size_of_parameters();
BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
int i=0;
BasicType stack_sig_bt[16];
VMRegPair stack_regs[16];
BasicType* sig_bt = (total_args_passed <= 16) ? stack_sig_bt : NEW_RESOURCE_ARRAY(BasicType, total_args_passed);
VMRegPair* regs = (total_args_passed <= 16) ? stack_regs : NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed);
int i = 0;
if (!method->is_static()) // Pass in receiver first
sig_bt[i++] = T_OBJECT;
SignatureStream ss(method->signature());