| 77 | |
| 78 | impl EngineFlags { |
| 79 | pub fn build_engine(&self) -> Result<Engine> { |
| 80 | let mut config = tinywasm::engine::Config::new(); |
| 81 | |
| 82 | if let Some(fuel_policy) = self.fuel_policy { |
| 83 | config = config.with_fuel_policy(match fuel_policy { |
| 84 | FuelPolicyArg::PerInstruction => FuelPolicy::PerInstruction, |
| 85 | FuelPolicyArg::Weighted => FuelPolicy::Weighted, |
| 86 | }); |
| 87 | } |
| 88 | |
| 89 | if let Some(memory_backend) = self.memory_backend { |
| 90 | config = config.with_memory_backend(match memory_backend { |
| 91 | MemoryBackendArg::Vec => tinywasm::MemoryBackend::vec(), |
| 92 | MemoryBackendArg::Paged => { |
| 93 | if self.memory_page_chunk_size == 0 { |
| 94 | bail!("--memory-page-chunk-size must be greater than zero") |
| 95 | } |
| 96 | tinywasm::MemoryBackend::paged(self.memory_page_chunk_size) |
| 97 | } |
| 98 | }); |
| 99 | } |
| 100 | |
| 101 | if let Some(value_stack_size) = self.value_stack_size { |
| 102 | config = config.with_value_stack(StackConfig::fixed(value_stack_size)); |
| 103 | } |
| 104 | |
| 105 | if let Some(value_stack_dynamic) = self.value_stack_dynamic.clone() { |
| 106 | config = config.with_value_stack(value_stack_dynamic.into_stack_config()); |
| 107 | } |
| 108 | |
| 109 | if let Some(call_stack_size) = self.call_stack_size { |
| 110 | config = config.with_call_stack(StackConfig::fixed(call_stack_size)); |
| 111 | } |
| 112 | |
| 113 | if let Some(call_stack_dynamic) = self.call_stack_dynamic.clone() { |
| 114 | config = config.with_call_stack(call_stack_dynamic.into_stack_config()); |
| 115 | } |
| 116 | |
| 117 | if self.trap_on_oom { |
| 118 | config = config.with_trap_on_oom(true); |
| 119 | } |
| 120 | |
| 121 | Ok(Engine::new(config)) |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | #[cfg(test)] |