84 lines
2.5 KiB
Nim
84 lines
2.5 KiB
Nim
import
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json, strutils,
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chronicles, nimcrypto, eth_common, stint,
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../vm_types, memory, stack, ../db/[db_chain, state_db],
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eth_trie/hexary, ./message, ranges/typedranges,
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./interpreter/opcode_values
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logScope:
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topics = "vm opcode"
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proc initTracer*(tracer: var TransactionTracer, flags: set[TracerFlags] = {}) =
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tracer.trace = newJObject()
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# make appear at the top of json object
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tracer.trace["gas"] = %0
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tracer.trace["failed"] = %false
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tracer.trace["returnValue"] = %""
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tracer.trace["structLogs"] = newJArray()
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tracer.flags = flags
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proc traceOpCodeStarted*(tracer: var TransactionTracer, c: BaseComputation, op: Op) =
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if unlikely tracer.trace.isNil:
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tracer.initTracer()
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let j = newJObject()
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tracer.trace["structLogs"].add(j)
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j["op"] = %(($op).toUpperAscii)
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j["pc"] = %(c.code.pc - 1)
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j["depth"] = %1 # stub
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j["gas"] = %c.gasMeter.gasRemaining
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tracer.gasRemaining = c.gasMeter.gasRemaining
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# log stack
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if TracerFlags.DisableStack notin tracer.flags:
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let st = newJArray()
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for v in c.stack.values:
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st.add(%v.dumpHex())
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j["stack"] = st
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# log memory
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if TracerFlags.DisableMemory notin tracer.flags:
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let mem = newJArray()
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const chunkLen = 32
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let numChunks = c.memory.len div chunkLen
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for i in 0 ..< numChunks:
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mem.add(%c.memory.bytes.toOpenArray(i * chunkLen, (i + 1) * chunkLen - 1).toHex())
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j["memory"] = mem
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proc traceOpCodeEnded*(tracer: var TransactionTracer, c: BaseComputation, op: Op) =
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let j = tracer.trace["structLogs"].elems[^1]
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# TODO: figure out how to get storage
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# when contract execution interrupted by exception
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if TracerFlags.DisableStorage notin tracer.flags:
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var storage = newJObject()
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var stateDB = c.vmState.chaindb.getStateDb(c.vmState.blockHeader.stateRoot, readOnly = true)
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for key, value in stateDB.storage(c.msg.storageAddress):
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storage[key.dumpHex] = %(value.dumpHex)
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j["storage"] = storage
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j["gasCost"] = %(tracer.gasRemaining - c.gasMeter.gasRemaining)
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if op in {Return, Revert}:
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let returnValue = %("0x" & toHex(c.rawOutput, true))
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j["returnValue"] = returnValue
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tracer.trace["returnValue"] = returnValue
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trace "Op", json = j.pretty()
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proc traceError*(tracer: var TransactionTracer, c: BaseComputation) =
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let j = tracer.trace["structLogs"].elems[^1]
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# TODO: figure out how to get gasCost
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# when contract execution failed before traceOpCodeEnded called
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# because exception raised
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#j["gasCost"] = %
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j["error"] = %(c.error.info)
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tracer.trace["failed"] = %true
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trace "Error", json = j.pretty()
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