/* This sample illustrates lexical scope vs lifetime (thanks to JIT's eager root collection).
* Both local and sc are collected much earlier than their lexical scope.
* !u -gcinfo 00007ff81c4c8598
* Normal JIT generated code
* CoreCLR.CollectScenarios.Scenarios.EagerRootCollection.LexicalScopeExample(Int32)
* Begin 00007ff81c5e3310, size 71
* 00007ff8`1c5e3310 57 push rdi
* 00007ff8`1c5e3311 56 push rsi
* 00007ff8`1c5e3312 4883ec28 sub rsp,28h
* 00007ff8`1c5e3316 8bf2 mov esi,edx
* 00007ff8`1c5e3318 48b908ad691cf87f0000 mov rcx,7FF81C69AD08h (MT: CoreCLR.CollectScenarios.Scenarios.EagerRootCollection+BigClass)
* 00007ff8`1c5e3322 e8596af65e call CoreCLR!JIT_New (00007ff8`7b549d80)
* 00000017 is a safepoint:
* 00007ff8`1c5e3327 488bf8 mov rdi,rax
* 00007ff8`1c5e332a 488bcf mov rcx,rdi
* 00007ff8`1c5e332d e8be5d0b5e call System_Private_CoreLib+0xc890f0 (00007ff8`7a6990f0) (System.Object..ctor(), mdToken: 0000000006000117)
* 00000022 is a safepoint:
* 00000021 +rdi
* 00007ff8`1c5e3332 897708 mov dword ptr [rdi+8],esi
* 00007ff8`1c5e3335 488bcf mov rcx,rdi
* 00007ff8`1c5e3338 e87bf8ffff call 00007ff8`1c5e2bb8 (CoreCLR.CollectScenarios.Scenarios.EagerRootCollection+BigClass.Check(), mdToken: 000000000600005a)
* 0000002d is a safepoint:
* 00007ff8`1c5e333d 85c0 test eax,eax
* 00007ff8`1c5e333f 7437 je 00007ff8`1c5e3378
* 00007ff8`1c5e3341 48b9e8af691cf87f0000 mov rcx,7FF81C69AFE8h (MT: CoreCLR.CollectScenarios.Scenarios.EagerRootCollection+SomeClass)
* 00007ff8`1c5e334b e8b0e14b5f call CoreCLR!JIT_TrialAllocSFastMP_InlineGetThread (00007ff8`7baa1500)
* 00000040 is a safepoint:
* 00007ff8`1c5e3350 488bf8 mov rdi,rax
* 00007ff8`1c5e3353 488bcf mov rcx,rdi
* 00007ff8`1c5e3356 e8955d0b5e call System_Private_CoreLib+0xc890f0 (00007ff8`7a6990f0) (System.Object..ctor(), mdToken: 0000000006000117)
* 0000004b is a safepoint:
* 0000004a +rdi
* 00007ff8`1c5e335b 488bcf mov rcx,rdi
* 00007ff8`1c5e335e 8bd6 mov edx,esi
* 00007ff8`1c5e3360 e87bf8ffff call 00007ff8`1c5e2be0 (CoreCLR.CollectScenarios.Scenarios.EagerRootCollection+SomeClass.CalculateSomething(Int32), mdToken: 0000000006000054)
* 00000055 is a safepoint:
* 00007ff8`1c5e3365 8bc8 mov ecx,eax
* 00007ff8`1c5e3367 e8047c195e call System_Private_CoreLib+0xd6af70 (00007ff8`7a77af70) (Internal.Runtime.Augments.RuntimeThread.Sleep(Int32), mdToken: 00000000060000e7)
* 0000005c is a safepoint:
* 00007ff8`1c5e336c b801000000 mov eax,1
* 00007ff8`1c5e3371 4883c428 add rsp,28h
* 00007ff8`1c5e3375 5e pop rsi
* 00007ff8`1c5e3376 5f pop rdi
* 00007ff8`1c5e3377 c3 ret
* 00007ff8`1c5e3378 33c0 xor eax,eax
* 00007ff8`1c5e337a 4883c428 add rsp,28h
* 00007ff8`1c5e337e 5e pop rsi
* 00007ff8`1c5e337f 5f pop rdi
* 00007ff8`1c5e3380 c3 ret
*/
///////////////////////////////////////////////////////////////////////
// Listing 8-5
private int LexicalScopeExample(int value)
{
BigClass local = new BigClass()
{
Field = value
};
if (local.Check())
{
SomeClass sc = new SomeClass();
int data = sc.CalculateSomething(value);
Thread.Sleep(data); // or DoSomeLongRunningCall(data);
return(1);
}
return(0);
}