diff options
Diffstat (limited to 'src/runtime/stack.h')
| -rw-r--r-- | src/runtime/stack.h | 21 |
1 files changed, 12 insertions, 9 deletions
diff --git a/src/runtime/stack.h b/src/runtime/stack.h index b30e32216..f97dc4ed8 100644 --- a/src/runtime/stack.h +++ b/src/runtime/stack.h @@ -69,16 +69,19 @@ enum { #endif // Plan 9 #endif // Windows - // The amount of extra stack to allocate beyond the size - // needed for the single frame that triggered the split. - StackExtra = 2048, + // The minimum size of stack used by Go code + StackMin = 2048, - // The minimum stack segment size to allocate. - // If the amount needed for the splitting frame + StackExtra - // is less than this number, the stack will have this size instead. - StackMin = 8192, - StackSystemRounded = StackSystem + (-StackSystem & (StackMin-1)), - FixedStack = StackMin + StackSystemRounded, + // The minimum stack size to allocate. + // The hackery here rounds FixedStack0 up to a power of 2. + FixedStack0 = StackMin + StackSystem, + FixedStack1 = FixedStack0 - 1, + FixedStack2 = FixedStack1 | (FixedStack1 >> 1), + FixedStack3 = FixedStack2 | (FixedStack2 >> 2), + FixedStack4 = FixedStack3 | (FixedStack3 >> 4), + FixedStack5 = FixedStack4 | (FixedStack4 >> 8), + FixedStack6 = FixedStack5 | (FixedStack5 >> 16), + FixedStack = FixedStack6 + 1, // Functions that need frames bigger than this use an extra // instruction to do the stack split check, to avoid overflow |