http://llvm.org/bugs/show_bug.cgi?id=20687
Bug ID: 20687
Summary: lldb segfault on go program
Product: lldb
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@cs.uiuc.edu
Reporter: tfar...@chromium.org
CC: tfi...@google.com
Classification: Unclassified
I just tried debugging a small go program it segfaulted very easily. gdb worked
fine though.
$ cat flag_parse.go
package main
import (
"flag"
)
func main() {
flag.Parse()
}
$ go build flag_parse.go
$ ~/llvm/build/bin/lldb flag_parse
(lldb) target create "flag_parse"
Current executable set to 'flag_parse' (x86_64).
(lldb) b main.main
Breakpoint 1: where = flag_parse`main.main + 21 at flag_parse.go:8, address =
0x0000000000400c15
(lldb) r
Process 18936 launching
Process 18936 stopped
* thread #1: tid = 18936, 0x0000000000421c05 flag_parse`_rt0_amd64_linux + 5 at
rt0_linux_amd64.s:9, name = 'flag_parse'
frame #0: 0x0000000000421c05 flag_parse`_rt0_amd64_linux + 5 at
rt0_linux_amd64.s:9
6
7 TEXT _rt0_amd64_linux(SB),NOSPLIT,$-8
8 LEAQ 8(SP), SI // argv
-> 9 MOVQ 0(SP), DI // argc
10 MOVQ $main(SB), AX
11 JMP AX
12
Process 18936 launched:
'/home/tfarina/src/repos/github.com/tfarina/rsc/go/flag_parse' (x86_64)
(lldb) Process 18936 stopped
* thread #1: tid = 18936, 0x0000000000400c15 flag_parse`main.main + 21 at
flag_parse.go:8, name = 'flag_parse', stop reason = breakpoint 1.1
frame #0: 0x0000000000400c15 flag_parse`main.main + 21 at flag_parse.go:8
5 )
6
7 func main() {
-> 8 flag.Parse()
9 }
s
(lldb) Process 18936 stopped
* thread #1: tid = 18936, 0x0000000000425619 flag_parse`flag.Parse + 25 at
flag.go:820, name = 'flag_parse', stop reason = step in
frame #0: 0x0000000000425619 flag_parse`flag.Parse + 25 at flag.go:820
817 // after all flags are defined and before flags are accessed by the
program.
818 func Parse() {
819 // Ignore errors; CommandLine is set for ExitOnError.
-> 820 CommandLine.Parse(os.Args[1:])
821 }
822
823 // Parsed returns true if the command-line flags have been parsed.
s
Segmentation fault (core dumped)
$ ~/llvm/build/bin/lldb --version
lldb version 3.6.0 (http://llvm.org/git/lldb.git revision
3c9eeefb4022614373ca99f4e95cd869e6b965e4)
$ gdb --version
GNU gdb (GDB) 7.7
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