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-rw-r--r--src/runtime/mprof.go5
-rw-r--r--src/runtime/runtime2.go2
2 files changed, 5 insertions, 2 deletions
diff --git a/src/runtime/mprof.go b/src/runtime/mprof.go
index 45f107722a..937194a238 100644
--- a/src/runtime/mprof.go
+++ b/src/runtime/mprof.go
@@ -39,7 +39,10 @@ const (
// size of bucket hash table
buckHashSize = 179999
- // max depth of stack to record in bucket
+ // maxStack is the max depth of stack to record in bucket.
+ // Note that it's only used internally as a guard against
+ // wildly out-of-bounds slicing of the PCs that come after
+ // a bucket struct, and it could increase in the future.
maxStack = 32
)
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go
index 2a02e1fb3b..885b493bad 100644
--- a/src/runtime/runtime2.go
+++ b/src/runtime/runtime2.go
@@ -583,7 +583,7 @@ type m struct {
alllink *m // on allm
schedlink muintptr
lockedg guintptr
- createstack [32]uintptr // stack that created this thread.
+ createstack [32]uintptr // stack that created this thread, it's used for StackRecord.Stack0, so it must align with it.
lockedExt uint32 // tracking for external LockOSThread
lockedInt uint32 // tracking for internal lockOSThread
nextwaitm muintptr // next m waiting for lock