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Diffstat (limited to 'eth/tracers/internal/tracers/evmdis_tracer.js')
| -rw-r--r-- | eth/tracers/internal/tracers/evmdis_tracer.js | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/eth/tracers/internal/tracers/evmdis_tracer.js b/eth/tracers/internal/tracers/evmdis_tracer.js new file mode 100644 index 0000000..bb19777 --- /dev/null +++ b/eth/tracers/internal/tracers/evmdis_tracer.js @@ -0,0 +1,93 @@ +// Copyright 2017 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +// evmdisTracer returns sufficient information from a trace to perform evmdis-style +// disassembly. +{ + stack: [{ops: []}], + + 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}, + + // result is invoked when all the opcodes have been iterated over and returns + // the final result of the tracing. + result: function() { return this.stack[0].ops; }, + + // fault is invoked when the actual execution of an opcode fails. + fault: function(log, db) { }, + + // step is invoked for every opcode that the VM executes. + step: function(log, db) { + var frame = this.stack[this.stack.length - 1]; + + var error = log.getError(); + if (error) { + frame["error"] = error; + } else if (log.getDepth() == this.stack.length) { + opinfo = { + op: log.op.toNumber(), + depth : log.getDepth(), + result: [], + }; + if (frame.ops.length > 0) { + var prevop = frame.ops[frame.ops.length - 1]; + for(var i = 0; i < this.npushes[prevop.op]; i++) + prevop.result.push(log.stack.peek(i).toString(16)); + } + switch(log.op.toString()) { + case "CALL": case "CALLCODE": + var instart = log.stack.peek(3).valueOf(); + var insize = log.stack.peek(4).valueOf(); + opinfo["gas"] = log.stack.peek(0).valueOf(); + opinfo["to"] = log.stack.peek(1).toString(16); + opinfo["value"] = log.stack.peek(2).toString(); + opinfo["input"] = log.memory.slice(instart, instart + insize); + opinfo["error"] = null; + opinfo["return"] = null; + opinfo["ops"] = []; + this.stack.push(opinfo); + break; + case "DELEGATECALL": case "STATICCALL": + var instart = log.stack.peek(2).valueOf(); + var insize = log.stack.peek(3).valueOf(); + opinfo["op"] = log.op.toString(); + opinfo["gas"] = log.stack.peek(0).valueOf(); + opinfo["to"] = log.stack.peek(1).toString(16); + opinfo["input"] = log.memory.slice(instart, instart + insize); + opinfo["error"] = null; + opinfo["return"] = null; + opinfo["ops"] = []; + this.stack.push(opinfo); + break; + case "RETURN": + var out = log.stack.peek(0).valueOf(); + var outsize = log.stack.peek(1).valueOf(); + frame.return = log.memory.slice(out, out + outsize); + break; + case "STOP": case "SUICIDE": + frame.return = log.memory.slice(0, 0); + break; + case "JUMPDEST": + opinfo["pc"] = log.getPC(); + } + if(log.op.isPush()) { + opinfo["len"] = log.op.toNumber() - 0x5e; + } + frame.ops.push(opinfo); + } else { + this.stack = this.stack.slice(0, log.getDepth()); + } + } +} |