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Merge pull request #113 from paritytech/fix-stack-top

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Default STACKTOP in env module - 256kb, configurable
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Sergey Pepyakin 2017-11-13 19:46:31 +03:00 committed by GitHub
commit d2dffb8f92
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1 changed files with 16 additions and 2 deletions
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18
src/interpreter/env.rs
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@ -12,8 +12,10 @@ use interpreter::table::TableInstance;
use interpreter::value::RuntimeValue;
use interpreter::variable::{VariableInstance, VariableType};
/// Memory address, at which stack begins.
/// Memory address, at which stack base begins.
const DEFAULT_STACK_BASE: u32 = 0;
/// Memory address, at which stack begins.
const DEFAULT_STACK_TOP: u32 = 256 * 1024;
/// Memory, allocated for stack.
const DEFAULT_TOTAL_STACK: u32 = 5 * 1024 * 1024;
/// Total memory, allocated by default.
@ -78,6 +80,8 @@ pub struct EnvParams {
pub allow_memory_growth: bool,
/// Table size.
pub table_size: u32,
/// Static reserve, if any
pub static_size: Option<u32>,
}
pub struct EnvModuleInstance<E: UserError> {
@ -188,22 +192,31 @@ pub fn env_module<E: UserError>(params: EnvParams) -> Result<EnvModuleInstance<E
// globals
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(DEFAULT_STACK_BASE as i32)])))
.with_export(ExportEntry::new("STACK_BASE".into(), Internal::Global(INDEX_GLOBAL_STACK_BASE)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(DEFAULT_STACK_BASE as i32)])))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(params.static_size.unwrap_or(DEFAULT_STACK_TOP) as i32)])))
.with_export(ExportEntry::new("STACKTOP".into(), Internal::Global(INDEX_GLOBAL_STACK_TOP)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const((DEFAULT_STACK_BASE + params.total_stack) as i32)])))
.with_export(ExportEntry::new("STACK_MAX".into(), Internal::Global(INDEX_GLOBAL_STACK_MAX)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const((DEFAULT_STACK_BASE + params.total_stack) as i32)])))
.with_export(ExportEntry::new("DYNAMIC_BASE".into(), Internal::Global(INDEX_GLOBAL_DYNAMIC_BASE)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const((DEFAULT_STACK_BASE + params.total_stack) as i32)])))
.with_export(ExportEntry::new("DYNAMICTOP_PTR".into(), Internal::Global(INDEX_GLOBAL_DYNAMICTOP_PTR)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(params.total_memory as i32)])))
.with_export(ExportEntry::new("TOTAL_MEMORY".into(), Internal::Global(INDEX_GLOBAL_TOTAL_MEMORY)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(0)])))
.with_export(ExportEntry::new("ABORT".into(), Internal::Global(INDEX_GLOBAL_ABORT)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(0)])))
.with_export(ExportEntry::new("EXITSTATUS".into(), Internal::Global(INDEX_GLOBAL_EXIT_STATUS)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(DEFAULT_TABLE_BASE as i32)]))) // TODO: what is this?
.with_export(ExportEntry::new("tableBase".into(), Internal::Global(INDEX_GLOBAL_TABLE_BASE)))
.with_global(GlobalEntry::new(GlobalType::new(ValueType::I32, false), InitExpr::new(vec![Opcode::I32Const(DEFAULT_MEMORY_BASE as i32)]))) // TODO: what is this?
.with_export(ExportEntry::new("memoryBase".into(), Internal::Global(INDEX_GLOBAL_MEMORY_BASE)))
// functions
@ -238,6 +251,7 @@ impl Default for EnvParams {
total_memory: DEFAULT_TOTAL_MEMORY,
allow_memory_growth: DEFAULT_ALLOW_MEMORY_GROWTH,
table_size: DEFAULT_TABLE_SIZE,
static_size: None,
}
}
}