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authorJamie Liu <jamieliu@google.com>2021-01-20 15:54:51 -0800
committergVisor bot <gvisor-bot@google.com>2021-01-20 15:56:40 -0800
commit9af6150b5e36bcc731db6f4693fe8e9c5848a5e3 (patch)
tree7fc45035c78846d6b1520fc32024269609fb97f0 /pkg/sentry/mm
parent2865166403896a668167678ba0a8c2ef24268ca0 (diff)
Remove string allocation from strings.Repeat() in /proc/[pid]/maps.
PiperOrigin-RevId: 352894106
Diffstat (limited to 'pkg/sentry/mm')
-rw-r--r--pkg/sentry/mm/procfs.go7
1 files changed, 3 insertions, 4 deletions
diff --git a/pkg/sentry/mm/procfs.go b/pkg/sentry/mm/procfs.go
index 6efe5102b..73bfbea49 100644
--- a/pkg/sentry/mm/procfs.go
+++ b/pkg/sentry/mm/procfs.go
@@ -17,7 +17,6 @@ package mm
import (
"bytes"
"fmt"
- "strings"
"gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile"
@@ -165,12 +164,12 @@ func (mm *MemoryManager) appendVMAMapsEntryLocked(ctx context.Context, vseg vmaI
}
if s != "" {
// Per linux, we pad until the 74th character.
- if pad := 73 - lineLen; pad > 0 {
- b.WriteString(strings.Repeat(" ", pad))
+ for pad := 73 - lineLen; pad > 0; pad-- {
+ b.WriteByte(' ')
}
b.WriteString(s)
}
- b.WriteString("\n")
+ b.WriteByte('\n')
}
// ReadSmapsDataInto is called by fsimpl/proc.smapsData.Generate to