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initial commit (#13)

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vms 2019-08-10 14:52:25 +03:00 committed by Dima
parent 728b78d713
commit 4c65740d03
3 changed files with 24 additions and 34 deletions
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2
build.gradle
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@ -21,7 +21,7 @@ buildscript {
allprojects {
apply plugin: 'java'
group 'com.github.cretz.asmble'
version '0.4.10-fl'
version '0.4.11-fl'
// skips building and running for the specified examples
ext.skipExamples = ['c-simple', 'go-simple', 'rust-regex']

17
compiler/src/main/kotlin/asmble/cli/ScriptCommand.kt
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@ -86,23 +86,12 @@ abstract class ScriptCommand<T> : Command<T>() {
}
}
val memBuilder = args.memoryBuilder
// throws ArithmeticException if the result overflows an int
val capacity = Math.multiplyExact(args.defaultMaxMemPages, Mem.PAGE_SIZE)
// Do registrations
context = args.registrations.fold(context) { ctx, (moduleName, className) ->
if (memBuilder != null) {
ctx.withModuleRegistered(moduleName,
Module.Native(Class.forName(className, true, ctx.classLoader)
.getConstructor(MemoryBuffer::class.java)
.newInstance(memBuilder.build(capacity))))
} else {
ctx.withModuleRegistered(moduleName,
Module.Native(Class.forName(className, true, ctx.classLoader).newInstance()))
}
ctx.withModuleRegistered(moduleName,
Module.Native(Class.forName(className, true, ctx.classLoader).newInstance()))
}
if (args.specTestRegister) context = context.withHarnessRegistered()
if (args.enableLogger) {

39
compiler/src/main/kotlin/asmble/run/jvm/EnvModule.kt
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@ -1,33 +1,39 @@
package asmble.run.jvm
/**
* Used to tack the state of the environment module.
*/
data class EnvState(
var spentGas: Long = 0,
// executed instruction counter
var EIC: Long = 0
)
/**
* Module used for gas and EIC metering.
*/
open class EnvModule(private val gasLimit: Long) {
private var overallSpentGas: Long = 0
// executed instruction counter
private var EIC: Long = 0
private var state = EnvState();
/**
* [Wasm function]
* Adds spent gas to overall spent gas and checks limit exceeding.
*/
fun gas(spentGas: Int) {
if(overallSpentGas + spentGas > gasLimit) {
if(state.spentGas + spentGas > gasLimit) {
// TODO : check for overflow, throw an exception
}
overallSpentGas += spentGas;
state.spentGas += spentGas;
}
/**
* [Wasm function]
* Adds EIC to overall executed instruction counter.
*/
fun eic(currentEIC: Int) {
EIC += currentEIC;
fun eic(EIC: Int) {
state.EIC += EIC;
}
/**
@ -35,21 +41,16 @@ open class EnvModule(private val gasLimit: Long) {
* It should be impossible to call this function from a Wasm module.
*/
fun clearState() {
overallSpentGas = 0;
EIC = 0;
state.spentGas = 0;
state.EIC = 0;
}
/**
* Returns spent gas. Used from WasmVm to determine spent gas after each invocation.
* Returns environment module state.
* Used from WasmVm to determine spent gas and executed instruction counter after each invocation.
*/
fun getSpentGas(): Long {
return overallSpentGas;
fun getState(): EnvState {
return state;
}
/**
* Returns current EIC. Used from WasmVm to determine count of executed instruction after each invocation.
*/
fun getEIC(): Long {
return EIC;
}
}