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| author | Michael Anthony Knyszek <mknyszek@google.com> | 2021-10-18 19:01:33 +0000 |
|---|---|---|
| committer | Michael Knyszek <mknyszek@google.com> | 2021-11-05 17:46:41 +0000 |
| commit | f063e0da28d441065d36f7d676f86d478f67db1f (patch) | |
| tree | fe9b9eb65be12c6d21f37058edcd12050968782b /src/runtime/runtime1.go | |
| parent | 4f543b59c5618abccf0e78a17a2aeb173c085a91 (diff) | |
| download | go-f063e0da28d441065d36f7d676f86d478f67db1f.tar.xz | |
runtime: add harddecommit GODEBUG flag
This change adds a new debug flag that makes the runtime map pages
PROT_NONE in sysUnused on Linux, in addition to the usual madvise calls.
This behavior mimics the behavior of decommit on Windows, and is helpful
in debugging the scavenger. sysUsed is also updated to re-map the pages
as PROT_READ|PROT_WRITE, mimicing Windows' explicit commit behavior.
Change-Id: Iaac5fcd0e6920bd1d0e753dd4e7f0c0b128fe842
Reviewed-on: https://go-review.googlesource.com/c/go/+/356612
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Diffstat (limited to 'src/runtime/runtime1.go')
| -rw-r--r-- | src/runtime/runtime1.go | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/runtime/runtime1.go b/src/runtime/runtime1.go index b6c3cbfff4..65e1e0eebc 100644 --- a/src/runtime/runtime1.go +++ b/src/runtime/runtime1.go @@ -315,6 +315,7 @@ var debug struct { schedtrace int32 tracebackancestors int32 asyncpreemptoff int32 + harddecommit int32 // debug.malloc is used as a combined debug check // in the malloc function and should be set @@ -344,6 +345,7 @@ var dbgvars = []dbgVar{ {"tracebackancestors", &debug.tracebackancestors}, {"asyncpreemptoff", &debug.asyncpreemptoff}, {"inittrace", &debug.inittrace}, + {"harddecommit", &debug.harddecommit}, } func parsedebugvars() { |