Increase max size of localloc and localloc_imm on amd64. (#15374) #1226
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
We hit the following assert when doing full AOT of some assemblies: wrong maximal instruction length of instruction localloc (expected 96, got 99) Assertion: should not be reached at mono\mono\mini\mini-amd64.c:6801 Turns out that that size could be hit when a couple of things happens as part of lowering OP_LOCALLOC and OP_LOCALLOC_IMM: sreg1 is not RAX, RCX or RDI dreg is not RAX, RCX or RDI cfg->param_area is bigger than 127 Fix is to increase max size of the instruction, from 96 -> 120 (same as x86).
joshpeterson
approved these changes
Sep 19, 2019
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Unity: case 1172987 - Fix crash that may occur when using stackalloc.
We hit the following assert when doing full AOT of some assemblies:
wrong maximal instruction length of instruction localloc (expected 96, got 99)
Assertion: should not be reached at mono\mono\mini\mini-amd64.c:6801
Turns out that that size could be hit when a couple of things happens as part
of lowering OP_LOCALLOC and OP_LOCALLOC_IMM:
sreg1 is not RAX, RCX or RDI
dreg is not RAX, RCX or RDI
cfg->param_area is bigger than 127
Fix is to increase max size of the instruction, from 96 -> 120 (same as x86).