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eth/tracers: add three more JavaScript tracers
This commit is contained in:
Martin Holst Swende
Péter Szilágyi
parent
5fb85d4b7d
commit
3947b547c2
4 changed files with 344 additions and 0 deletions
70
eth/tracers/internal/tracers/4byte_tracer.js
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eth/tracers/internal/tracers/4byte_tracer.js
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/**
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4bytes searches for 4byte-identifiers, and collects them for post-processing.
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It collects the methods identifiers along with the size of the supplied data, so that
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a reversed signature can be matched against the size of the data.
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Example:
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> debug.traceTransaction( "0x214e597e35da083692f5386141e69f47e973b2c56e7a8073b1ea08fd7571e9de", {tracer: "4bytes"})
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{
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0x27dc297e-128: 1,
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0x38cc4831-0: 2,
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0x524f3889-96: 1,
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0xadf59f99-288: 1,
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0xc281d19e-0: 1
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}
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@author MH Swende
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**/
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{
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ids : {},
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// callType returns 'false' for non-calls, or the
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// peek-index for the first param after 'value', i.e. meminstart
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callType : function(opstr){
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switch(opstr){
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case "CALL":
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case "CALLCODE":
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//g,a,v, memin, meminsz, memout, memoutsz
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return 3 //stack ptr to memin
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case "DELEGATECALL":
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case "STATICCALL":
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//g,a,memin, meminsz, memout, memoutsz
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return 2;//stack ptr to memin
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}
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return false;
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},
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// store save the given indentifier and datasize
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store: function(id, size){
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var key = ""+id+"-"+size;
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this.ids[key] = this.ids[key]+1 || 1;
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},
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// step is invoked for every opcode that the VM executes.
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step: function(log, db) {
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var ct = this.callType(log.op.toString());
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if (!ct) return;
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// Skip any pre-compile invocations, those are just fancy opcodes
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if (isPrecompiled(toAddress(log.stack.peek(1).Bytes()))) {
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return
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}
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// Gather internal call details
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var inSz = log.stack.peek(ct + 1).Int64();
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if (inSz >= 4) {
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var inOff = log.stack.peek(ct).Int64();
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this.store(toHex(log.memory.slice(inOff, inOff + 4)), inSz-4);
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}
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},
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// result is invoked when all the opcodes have been iterated over and returns
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// the final result of the tracing.
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result: function(ctx) {
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//Save the outer calldata also
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if(ctx.input.length > 4){
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this.store(toHex(ctx.input.slice(0,4)),ctx.input.length-4 )
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}
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return this.ids;
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},
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}
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File diff suppressed because one or more lines are too long
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eth/tracers/internal/tracers/emvdis_tracer.js
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eth/tracers/internal/tracers/emvdis_tracer.js
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/**
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This tracer returns sufficent information from a trace to
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perform evmdis-style disassembly
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@author Nick Johnson, Martin Swende
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**/
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{
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"stack": [{"ops": []}],
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"npushes": {0: 0, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1, 16: 1, 17: 1, 18: 1, 19: 1, 20: 1, 21: 1, 22: 1, 23: 1, 24: 1, 25: 1, 26: 1, 32: 1, 48: 1, 49: 1, 50: 1, 51: 1, 52: 1, 53: 1, 54: 1, 55: 0, 56: 1, 57: 0, 58: 1, 59: 1, 60: 0, 64: 1, 65: 1, 66: 1, 67: 1, 68: 1, 69: 1, 80: 0, 81: 1, 82: 0, 83: 0, 84: 1, 85: 0, 86: 0, 87: 0, 88: 1, 89: 1, 90: 1, 91: 0, 96: 1, 97: 1, 98: 1, 99: 1, 100: 1, 101: 1, 102: 1, 103: 1, 104: 1, 105: 1, 106: 1, 107: 1, 108: 1, 109: 1, 110: 1, 111: 1, 112: 1, 113: 1, 114: 1, 115: 1, 116: 1, 117: 1, 118: 1, 119: 1, 120: 1, 121: 1, 122: 1, 123: 1, 124: 1, 125: 1, 126: 1, 127: 1, 128: 2, 129: 3, 130: 4, 131: 5, 132: 6, 133: 7, 134: 8, 135: 9, 136: 10, 137: 11, 138: 12, 139: 13, 140: 14, 141: 15, 142: 16, 143: 17, 144: 2, 145: 3, 146: 4, 147: 5, 148: 6, 149: 7, 150: 8, 151: 9, 152: 10, 153: 11, 154: 12, 155: 13, 156: 14, 157: 15, 158: 16, 159: 17, 160: 0, 161: 0, 162: 0, 163: 0, 164: 0, 240: 1, 241: 1, 242: 1, 243: 0, 244: 0, 255: 0},
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"result": function() { return this.stack[0].ops; },
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"step": function(log, db) {
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var frame = this.stack[this.stack.length - 1];
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if(log.err) {
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frame["error"] = log.err.toString();
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} else if(log.depth == this.stack.length) {
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opinfo = {
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"op": log.op.toNumber(),
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"depth" : log.depth,
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"result": [],
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};
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if(frame.ops.length > 0) {
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var prevop = frame.ops[frame.ops.length - 1];
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for(var i = 0; i < this.npushes[prevop.op]; i++)
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prevop.result.push(log.stack.peek(i).Text(16));
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}
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switch(log.op.toString()) {
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case "CALL":
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case "CALLCODE":
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var instart = log.stack.peek(3).Int64();
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var insize = log.stack.peek(4).Int64();
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opinfo["gas"] = log.stack.peek(0).Int64();
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opinfo["to"] = log.stack.peek(1).Text(16);
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opinfo["value"] = log.stack.peek(2).String();
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opinfo["input"] = log.memory.slice(instart, instart + insize);
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opinfo["error"] = null;
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opinfo["return"] = null;
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opinfo["ops"] = [];
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this.stack.push(opinfo);
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break;
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case "DELEGATECALL":
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case "STATICCALL":
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var instart = log.stack.peek(2).Int64();
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var insize = log.stack.peek(3).Int64();
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opinfo["op"] = log.op.toString();
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opinfo["gas"] = log.stack.peek(0).Int64();
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opinfo["to"] = log.stack.peek(1).Text(16);
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opinfo["input"] = log.memory.slice(instart, instart + insize);
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opinfo["error"] = null;
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opinfo["return"] = null;
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opinfo["ops"] = [];
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this.stack.push(opinfo);
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break;
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case "RETURN":
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var out = log.stack.peek(0).Int64();
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var outsize = log.stack.peek(1).Int64();
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frame.return = log.memory.slice(out, out + outsize);
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break;
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case "STOP":
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case "SUICIDE":
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frame.return = log.memory.slice(0, 0);
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break;
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case "JUMPDEST":
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opinfo["pc"] = log.pc;
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}
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if(log.op.isPush()) {
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opinfo["len"] = log.op.toNumber() - 0x5e;
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}
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frame.ops.push(opinfo);
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} else {
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this.stack = this.stack.slice(0, log.depth);
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}
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}
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}
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131
eth/tracers/internal/tracers/genesis_tracer.js
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eth/tracers/internal/tracers/genesis_tracer.js
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/**
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This tracer-script outputs sufficient information to create a local
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execution of the transaction.
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@author Martin Holst Swende
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**/
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{
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//The genesis that we're building
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prestate : null,
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lookupAccount: function(acc,db){
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var addr = toHex(acc);
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if(this.prestate[addr]) return;
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this.prestate[addr] = {
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'balance': db.getBalance(acc),
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'nonce' : db.getNonce(acc),
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'code' : toHex(db.getCode(acc)),
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'storage' : {}
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};
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},
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lookupStorage: function(addr, index, db){
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//No overwrite
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if (!this.prestate[addr]['storage'][index]){
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this.prestate[addr]['storage'][index] = db.getState(addr,key);
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}
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},
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result: function(ctx,db) {
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// At this point, we need to deduct the 'value' from the
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// outer transaction, and move it back to the origin
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var from = toAddress(ctx.from);
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var to = toAddress(ctx.to);
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var v = ctx.value;
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this.lookupAccount(from, db);
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// Add back value to sender (bigints)
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var from_bal = this.prestate[toHex(from)]['balance'];
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var to_bal = this.prestate[toHex(to)]['balance'];
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to_bal.Sub(to_bal, v);
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from_bal.Add(from_bal, v);
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// Set back nonce (uint64)
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this.prestate[toHex(from)]['nonce']--;
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//Note, the sender-account still may not be 100% correct,
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// since we haven't accounted for the gas.
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//Homestead
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config = {
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"eip150Block": 2000,
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"eip158Block": 2000,
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"eip155Block": 2000,
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"homesteadBlock": 0,
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"daoForkBlock": 0,
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"byzantiumBlock" : 2000,
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}
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var blnum = ctx['blocknumber']
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if (blnum > 2463000){
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// Tangerine: disable
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config["eip150Block"] = 0;
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}
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if (blnum > 2675000){
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// Spurious
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config["eip155Block"] = 0;
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config["eip158Block"] = 0;
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}
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if (blnum > 4370000){
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//Byzantium
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config["byzantiumBlock"] = 0;
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}
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genesis ={
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nonce: "0x0000000000000000",
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difficulty: "0x020000",
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mixhash: "0x0000000000000000000000000000000000000000000000000000000000000000",
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coinbase: "0x0000000000000000000000000000000000000000",
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timestamp: "0x00",
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number: "0x00",
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parentHash: "0x0000000000000000000000000000000000000000000000000000000000000000",
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extraData: "0x0000000000000000000000000000000000000000000000000000000000000000",
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gasLimit: toHex(ctx['gas'].Bytes()),
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alloc: this.prestate,
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config: config,
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};
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return genesis;
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},
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step: function(log, db) {
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if (!this.prestate){
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// Add the current account
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this.prestate = {};
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// Balance will potentially be wrong here,
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// since this will include the value sent
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// along with the message
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// We fix that in 'result()'
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this.lookupAccount(log.account,db);
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}
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switch(log.op.toString()){
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case "EXTCODECOPY":
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case "EXTCODESIZE":
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case "BALANCE":
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var addr = log.peek(0).Text(16);
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this.lookupAccount(addr,db);
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break;
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case "CALL":
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case "CALLCODE":
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case "DELEGATECALL":
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case "STATICCALL":
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var addr = log.stack.peek(1).Text(16);
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this.lookupAccount(addr,db);
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break;
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case 'SSTORE':
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case 'SLOAD':
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var key = log.stack.peek(0).Text(16);
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this.lookupStorage(log.account.Text(16), key,db);
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break;
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}
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}
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}
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/** TODO
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Missing BLOCKNUM
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Somehow get 'origin'-account in there.
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**/
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