|
3 | 3 | #![allow(clippy::missing_safety_doc)]
|
4 | 4 |
|
5 | 5 | use mmtk::util::options::PlanSelector;
|
| 6 | +use std::str::FromStr; |
6 | 7 | use std::sync::atomic::Ordering;
|
7 | 8 |
|
8 | 9 | use crate::abi::RawVecOfObjRef;
|
@@ -41,76 +42,77 @@ pub extern "C" fn mmtk_is_reachable(object: ObjectReference) -> bool {
|
41 | 42 |
|
42 | 43 | // =============== Bootup ===============
|
43 | 44 |
|
44 |
| -fn mmtk_builder_default_parse_threads() -> usize { |
45 |
| - let threads_str = std::env::var("MMTK_THREADS").unwrap_or("0".to_string()); |
| 45 | +fn parse_env_var_with<T, F: FnOnce(&str) -> Option<T>>(key: &str, parse: F) -> Option<T> { |
| 46 | + let val = match std::env::var(key) { |
| 47 | + Ok(val) => val, |
| 48 | + Err(std::env::VarError::NotPresent) => return None, |
| 49 | + Err(std::env::VarError::NotUnicode(os_string)) => { |
| 50 | + eprintln!("[FATAL] Invalid {key} {os_string:?}"); |
| 51 | + std::process::exit(1); |
| 52 | + } |
| 53 | + }; |
46 | 54 |
|
47 |
| - threads_str.parse::<usize>().unwrap_or_else(|_err| { |
48 |
| - eprintln!("[FATAL] Invalid MMTK_THREADS {}", threads_str); |
| 55 | + let parsed = parse(&val).unwrap_or_else(|| { |
| 56 | + eprintln!("[FATAL] Invalid {key} {val}"); |
49 | 57 | std::process::exit(1);
|
50 |
| - }) |
51 |
| -} |
| 58 | + }); |
52 | 59 |
|
53 |
| -fn mmtk_builder_default_parse_heap_min() -> usize { |
54 |
| - const DEFAULT_HEAP_MIN: usize = 1 << 20; |
| 60 | + Some(parsed) |
| 61 | +} |
55 | 62 |
|
56 |
| - let heap_min_str = std::env::var("MMTK_HEAP_MIN").unwrap_or(DEFAULT_HEAP_MIN.to_string()); |
| 63 | +fn parse_env_var<T: FromStr>(key: &str) -> Option<T> { |
| 64 | + parse_env_var_with(key, |s| s.parse().ok()) |
| 65 | +} |
57 | 66 |
|
58 |
| - let size = parse_capacity(&heap_min_str, 0); |
59 |
| - if size == 0 { |
60 |
| - eprintln!("[FATAL] Invalid MMTK_HEAP_MIN {}", heap_min_str); |
61 |
| - std::process::exit(1); |
62 |
| - } |
| 67 | +fn mmtk_builder_default_parse_threads() -> Option<usize> { |
| 68 | + parse_env_var("MMTK_THREADS") |
| 69 | +} |
63 | 70 |
|
64 |
| - size |
| 71 | +fn mmtk_builder_default_parse_heap_min() -> usize { |
| 72 | + const DEFAULT_HEAP_MIN: usize = 1 << 20; |
| 73 | + parse_env_var_with("MMTK_HEAP_MIN", parse_capacity).unwrap_or(DEFAULT_HEAP_MIN) |
65 | 74 | }
|
66 | 75 |
|
67 | 76 | fn mmtk_builder_default_parse_heap_max() -> usize {
|
68 |
| - let heap_max_str = std::env::var("MMTK_HEAP_MAX").unwrap_or(default_heap_max().to_string()); |
69 |
| - |
70 |
| - let size = parse_capacity(&heap_max_str, 0); |
71 |
| - if size == 0 { |
72 |
| - eprintln!("[FATAL] Invalid MMTK_HEAP_MAX {}", heap_max_str); |
73 |
| - std::process::exit(1); |
74 |
| - } |
75 |
| - |
76 |
| - size |
| 77 | + parse_env_var_with("MMTK_HEAP_MAX", parse_capacity).unwrap_or_else(default_heap_max) |
77 | 78 | }
|
78 | 79 |
|
79 | 80 | fn mmtk_builder_default_parse_heap_mode(heap_min: usize, heap_max: usize) -> GCTriggerSelector {
|
80 |
| - let heap_mode_str = std::env::var("MMTK_HEAP_MODE").unwrap_or("dynamic".to_string()); |
| 81 | + let make_fixed = || GCTriggerSelector::FixedHeapSize(heap_max); |
| 82 | + let make_dynamic = || GCTriggerSelector::DynamicHeapSize(heap_min, heap_max); |
81 | 83 |
|
82 |
| - match heap_mode_str.as_str() { |
83 |
| - "fixed" => GCTriggerSelector::FixedHeapSize(heap_max), |
84 |
| - "dynamic" => GCTriggerSelector::DynamicHeapSize(heap_min, heap_max), |
85 |
| - _ => { |
86 |
| - eprintln!("[FATAL] Invalid MMTK_HEAP_MODE {}", heap_mode_str); |
87 |
| - std::process::exit(1); |
88 |
| - } |
89 |
| - } |
| 84 | + parse_env_var_with("MMTK_HEAP_MODE", |s| match s { |
| 85 | + "fixed" => Some(make_fixed()), |
| 86 | + "dynamic" => Some(make_dynamic()), |
| 87 | + _ => None, |
| 88 | + }) |
| 89 | + .unwrap_or_else(make_dynamic) |
90 | 90 | }
|
91 | 91 |
|
92 | 92 | fn mmtk_builder_default_parse_plan() -> PlanSelector {
|
93 |
| - let plan_str = std::env::var("MMTK_PLAN").unwrap_or("Immix".to_string()); |
94 |
| - |
95 |
| - match plan_str.as_str() { |
96 |
| - "NoGC" => PlanSelector::NoGC, |
97 |
| - "MarkSweep" => PlanSelector::MarkSweep, |
98 |
| - "Immix" => PlanSelector::Immix, |
99 |
| - _ => { |
100 |
| - eprintln!("[FATAL] Invalid MMTK_PLAN {}", plan_str); |
101 |
| - std::process::exit(1); |
102 |
| - } |
103 |
| - } |
| 93 | + parse_env_var_with("MMTK_PLAN", |s| match s { |
| 94 | + "NoGC" => Some(PlanSelector::NoGC), |
| 95 | + "MarkSweep" => Some(PlanSelector::MarkSweep), |
| 96 | + "Immix" => Some(PlanSelector::Immix), |
| 97 | + _ => None, |
| 98 | + }) |
| 99 | + .unwrap_or(PlanSelector::Immix) |
104 | 100 | }
|
105 | 101 |
|
106 | 102 | #[no_mangle]
|
107 | 103 | pub extern "C" fn mmtk_builder_default() -> *mut MMTKBuilder {
|
108 | 104 | let mut builder = MMTKBuilder::new_no_env_vars();
|
109 | 105 | builder.options.no_finalizer.set(true);
|
110 | 106 |
|
111 |
| - let threads = mmtk_builder_default_parse_threads(); |
112 |
| - if threads > 0 { |
113 |
| - builder.options.threads.set(threads); |
| 107 | + if let Some(threads) = mmtk_builder_default_parse_threads() { |
| 108 | + if !builder.options.threads.set(threads) { |
| 109 | + // MMTk will validate it and reject 0. |
| 110 | + eprintln!( |
| 111 | + "[FATAL] Failed to set the number of MMTk threads to {}", |
| 112 | + threads |
| 113 | + ); |
| 114 | + std::process::exit(1); |
| 115 | + } |
114 | 116 | }
|
115 | 117 |
|
116 | 118 | let heap_min = mmtk_builder_default_parse_heap_min();
|
|
0 commit comments