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| author | Michael Schmidt <github@mschmidt.me> | 2023-01-16 15:35:11 +0100 |
|---|---|---|
| committer | Xavier Leroy <xavier.leroy@college-de-france.fr> | 2023-01-23 18:14:20 +0100 |
| commit | 3ebc2e9bd947aa213f2bc5eaf19fe9ffc8f9b5ca (patch) | |
| tree | 688882626c0b35d9bc20e5a965ebf4121971cfba /backend/Tailcall.v | |
| parent | 800017c36c15774bdcc7dc5b318fa9606caa4170 (diff) | |
| download | compcert-3ebc2e9bd947aa213f2bc5eaf19fe9ffc8f9b5ca.tar.gz compcert-3ebc2e9bd947aa213f2bc5eaf19fe9ffc8f9b5ca.zip | |
Disable tail calls in variadic functions
Variadic functions can use the stack frame to store values of registers.
Hence, a pointer within the stack frame can be put in a va_list, and
the stack frame should not be deallocated before a function call that
may use this va_list.
Fixes: #473
Diffstat (limited to 'backend/Tailcall.v')
| -rw-r--r-- | backend/Tailcall.v | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/backend/Tailcall.v b/backend/Tailcall.v index b7a62d74..2da07ee8 100644 --- a/backend/Tailcall.v +++ b/backend/Tailcall.v @@ -93,6 +93,7 @@ Definition transf_instr (f: function) (pc: node) (instr: instruction) := Definition transf_function (f: function) : function := if zeq f.(fn_stacksize) 0 + && option_eq zeq f.(fn_sig).(sig_cc).(cc_vararg) None then RTL.transf_function (transf_instr f) f else f. |