hangs upon execution

[nolash]

compiling the following with solc --optimize --bin-runtime

pragma solidity ^0.4.11;

contract Simple {
	bytes32 public v;
	function set(bytes32 _v) {
		v = _v;
	}
}

bytecode:

606060405263ffffffff7c01000000000000000000000000000000000000000000000000000000006000350416637c2efcba81146046578063db80813f146068575b600080fd5b3415605057600080fd5b6056607d565b60405190815260200160405180910390f35b3415607257600080fd5b607b6004356083565b005b60005481565b60008190555b505600a165627a7a72305820645352c019aae26da402b9c2edac41e0989caf52f865879af82a9646ae1f3f9c0029

I then try:

evmdis -log <binfile>
evmdis -log <bytecode>

The command hangs till I manually SIGINT.

---

I try:

cat <binfile> | evmdis -log

I get:

2017/08/03 09:24:35 Entering block at 0 with stack height 0
# Stack: []
0x0	STOP()

I also tried solc --optimize --bin and evmdis -ctor -log, same results.

---

My setup:

• evmdis: 1abeda0
• solc: 0.4.14-develop.2017.7.27+commit.16ca1eea.Linux.g++
• gcc/g++: 7.1.1
• linux: 4.11.3-1-ARCH

[Macil]

Yeah I'm having the same behavior too. http://blog.curvegrid.com/daysofblock/2017/05/11/daysofblock-01-evmdis.html makes it look like you are in fact supposed to pass the input through stdin, but my results match up with you rather than that blog post.

[shoenseiwaso]

@nolash, you need to pipe the hex into evmdis, it won't take a file as a parameter. So your cat <binfile> | evmdis -log is the right idea. I suspect what's happening with the short output is your <binfile> has a newline on the end, which causes that output.

Compare the following. evmdis-issue-6-orig-crlf.hex has a newline on the end and evmdis-issue-6-orig.hex doesn't, otherwise they are identical. I copied the compiled Solidity hex code you pasted verbatim:

$ cat evmdis-issue-6-orig-crlf.hex | evmdis -log
2017/09/12 21:08:10 Entering block at 0 with stack height 0
# Stack: []
0x0	STOP()

$ cat evmdis-issue-6-orig.hex | evmdis -log
2017/09/12 21:06:51 Entering block at 0 with stack height 0
2017/09/12 21:06:51 Entering block at 55 with stack height 1
2017/09/12 21:06:51 Entering block at 66 with stack height 1
2017/09/12 21:06:51 Entering block at 105 with stack height 1
2017/09/12 21:06:51 Entering block at 110 with stack height 1
2017/09/12 21:06:51 Entering block at 115 with stack height 1
2017/09/12 21:06:51 Entering block at 132 with stack height 3
2017/09/12 21:06:51 Entering block at 138 with stack height 3
2017/09/12 21:06:51 Entering block at 124 with stack height 1
2017/09/12 21:06:51 Entering block at 71 with stack height 1
2017/09/12 21:06:51 Entering block at 76 with stack height 1
2017/09/12 21:06:51 Entering block at 81 with stack height 1
2017/09/12 21:06:51 Entering block at 126 with stack height 2
2017/09/12 21:06:51 Entering block at 87 with stack height 3
# Stack: []
0x4	MSTORE(0x40, 0x60)
0x2C	PUSH(CALLDATALOAD(0x0) / 0x100000000000000000000000000000000000000000000000000000000 & 0xFFFFFFFF)
0x32	DUP1
0x36	JUMPI(:label0, POP() == 0x7C2EFCBA)

# Stack: [@0x2C]
0x37	DUP1
0x40	JUMPI(:label3, 0xDB80813F == POP())

# Stack: [@0x2C]
0x42	PUSH(0x0)
<snip>

Hope that helps!

And obviously a future enhancement opportunity to improve the help text (evmdis -h), README and overall handling of newlines.

[shoenseiwaso]

@agentme could you check my previous comment and see if that helps?

[Macil]

Yep, it was the newline at the end! Works great when I cut that out, thanks!