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go version
tip
$ go build hello.go $ go tool objdump hello
Look at the end of the output, the last two functions has file name missing:
[... ...] TEXT runtime.kevent(SB) /Users/cherryyz/src/go-tip/src/runtime/sys_darwin_amd64.s sys_darwin_amd64.s:491 0x4b150 8b7c2408 MOVL 0x8(SP), DI sys_darwin_amd64.s:492 0x4b154 488b742410 MOVQ 0x10(SP), SI sys_darwin_amd64.s:493 0x4b159 8b542418 MOVL 0x18(SP), DX sys_darwin_amd64.s:494 0x4b15d 4c8b542420 MOVQ 0x20(SP), R10 sys_darwin_amd64.s:495 0x4b162 448b442428 MOVL 0x28(SP), R8 sys_darwin_amd64.s:496 0x4b167 4c8b4c2430 MOVQ 0x30(SP), R9 sys_darwin_amd64.s:497 0x4b16c b86b010002 MOVL $0x200016b, AX sys_darwin_amd64.s:498 0x4b171 0f05 SYSCALL sys_darwin_amd64.s:499 0x4b173 7303 JAE 0x4b178 sys_darwin_amd64.s:500 0x4b175 48f7d8 NEGQ AX sys_darwin_amd64.s:501 0x4b178 89442438 MOVL AX, 0x38(SP) sys_darwin_amd64.s:502 0x4b17c c3 RET :-1 0x4b17d cc INT $0x3 :-1 0x4b17e cc INT $0x3 :-1 0x4b17f cc INT $0x3 TEXT runtime/internal/atomic.Xaddint64(SB) :59 0x4b180 e90b000000 JMP runtime/internal/atomic.Xadd64(SB) :-1 0x4b185 cc INT $0x3 :-1 0x4b186 cc INT $0x3 :-1 0x4b187 cc INT $0x3 :-1 0x4b188 cc INT $0x3 :-1 0x4b189 cc INT $0x3 :-1 0x4b18a cc INT $0x3 :-1 0x4b18b cc INT $0x3 :-1 0x4b18c cc INT $0x3 :-1 0x4b18d cc INT $0x3 :-1 0x4b18e cc INT $0x3 :-1 0x4b18f cc INT $0x3 TEXT runtime/internal/atomic.Xadd64(SB) :92 0x4b190 488b5c2408 MOVQ 0x8(SP), BX :93 0x4b195 488b442410 MOVQ 0x10(SP), AX :94 0x4b19a 4889c1 MOVQ AX, CX :95 0x4b19d f0480fc103 LOCK XADDQ AX, 0(BX) :97 0x4b1a2 4801c8 ADDQ CX, AX :98 0x4b1a5 4889442418 MOVQ AX, 0x18(SP) :99 0x4b1aa c3 RET
According to https://golang.org/s/go12symtab,
The pcfile pc-value table produces indexes into a table of source file names. That table has the format: N+1 name1 name2 name3 … nameN
Parsing the binary manually, it has N at the place where it should be N+1. objdump does what the doc says, and so ignores the last entry.
This problem has existed since at least Go 1.6 (did not check even earlier versions.)
(runtime/internal/atomic.Xaddint64 should be intrinsified, which is another issue. I have sent a CL.)
runtime/internal/atomic.Xaddint64
The text was updated successfully, but these errors were encountered:
CL https://golang.org/cl/29275 mentions this issue.
Sorry, something went wrong.
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What version of Go are you using (
go version
)?tip
What did you do?
Look at the end of the output, the last two functions has file name missing:
According to https://golang.org/s/go12symtab,
Parsing the binary manually, it has N at the place where it should be N+1. objdump does what the doc says, and so ignores the last entry.
This problem has existed since at least Go 1.6 (did not check even earlier versions.)
(
runtime/internal/atomic.Xaddint64
should be intrinsified, which is another issue. I have sent a CL.)The text was updated successfully, but these errors were encountered: