proc: do not crash if executable doesn't have a PT_TLS section (#1483)

Fixes #1481
2019-02-26 18:17:05 +01:00 · 2019-02-26 18:17:05 +01:00 · 3ba4bcf488
commit 3ba4bcf488
parent 14aeea2bd9
1 changed files with 4 additions and 0 deletions
--- a/pkg/proc/bininfo.go
+++ b/pkg/proc/bininfo.go
@ -754,6 +754,10 @@ func (bi *BinaryInfo) setGStructOffsetElf(exe *elf.File, wg *sync.WaitGroup) {
 			break
 		}
 	}
+	if tls == nil {
+		bi.gStructOffset = ^uint64(8) + 1 // -8
+		return
+	}
 	memsz := tls.Memsz

 	memsz = (memsz + uint64(bi.Arch.PtrSize()) - 1) & ^uint64(bi.Arch.PtrSize()-1) // align to pointer-sized-boundary