rust/mk/clean.mk
Alex Crichton 7a3fdfbf67 Remove morestack support
This commit removes all morestack support from the compiler which entails:

* Segmented stacks are no longer emitted in codegen.
* We no longer build or distribute libmorestack.a
* The `stack_exhausted` lang item is no longer required

The only current use of the segmented stack support in LLVM is to detect stack
overflow. This is no longer really required, however, because we already have
guard pages for all threads and registered signal handlers watching for a
segfault on those pages (to print out a stack overflow message). Additionally,
major platforms (aka Windows) already don't use morestack.

This means that Rust is by default less likely to catch stack overflows because
if a function takes up more than one page of stack space it won't hit the guard
page. This is what the purpose of morestack was (to catch this case), but it's
better served with stack probes which have more cross platform support and no
runtime support necessary. Until LLVM supports this for all platform it looks
like morestack isn't really buying us much.

cc #16012 (still need stack probes)
Closes #26458 (a drive-by fix to help diagnostics on stack overflow)
2015-08-10 16:35:44 -07:00

119 lines
3.6 KiB
Makefile

# Copyright 2012 The Rust Project Developers. See the COPYRIGHT
# file at the top-level directory of this distribution and at
# http://rust-lang.org/COPYRIGHT.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.
######################################################################
# Cleanup
######################################################################
CLEAN_STAGE_RULES := \
$(foreach stage, $(STAGES), \
$(foreach host, $(CFG_HOST), \
clean$(stage)_H_$(host) \
$(foreach target, $(CFG_TARGET), \
clean$(stage)_T_$(target)_H_$(host))))
CLEAN_STAGE_RULES := $(CLEAN_STAGE_RULES) \
$(foreach host, $(CFG_HOST), clean-generic-H-$(host))
CLEAN_STAGE_RULES := $(CLEAN_STAGE_RULES) \
$(foreach host, $(CFG_TARGET), clean-generic-T-$(host))
CLEAN_LLVM_RULES = \
$(foreach target, $(CFG_HOST), \
clean-llvm$(target))
.PHONY: clean clean-all clean-misc clean-llvm
clean-all: clean clean-llvm
clean-llvm: $(CLEAN_LLVM_RULES)
clean: clean-misc $(CLEAN_STAGE_RULES)
clean-misc:
@$(call E, cleaning)
$(Q)rm -f $(RUNTIME_OBJS) $(RUNTIME_DEF)
$(Q)rm -f $(RUSTLLVM_LIB_OBJS) $(RUSTLLVM_OBJS_OBJS) $(RUSTLLVM_DEF)
$(Q)rm -Rf $(GENERATED)
$(Q)rm -Rf tmp/*
$(Q)rm -Rf rust-stage0-*.tar.bz2 $(PKG_NAME)-*.tar.gz $(PKG_NAME)-*.exe
$(Q)rm -Rf dist/*
$(Q)rm -Rf doc
define CLEAN_GENERIC
clean-generic-$(2)-$(1):
$(Q)find $(1)/rustllvm \
$(1)/rt \
$(1)/test \
$(1)/stage* \
-type f \( \
-name '*.[odasS]' -o \
-name '*.so' -o \
-name '*.dylib' -o \
-name '*.rlib' -o \
-name 'stamp.*' -o \
-name '*.lib' -o \
-name '*.dll' -o \
-name '*.def' -o \
-name '*.py' -o \
-name '*.pyc' -o \
-name '*.bc' \
\) \
| xargs rm -f
$(Q)find $(1) \
-name '*.dSYM' \
| xargs rm -Rf
endef
$(foreach host, $(CFG_HOST), $(eval $(call CLEAN_GENERIC,$(host),H)))
$(foreach targ, $(CFG_TARGET), $(eval $(call CLEAN_GENERIC,$(targ),T)))
define CLEAN_HOST_STAGE_N
clean$(1)_H_$(2): \
$$(foreach crate,$$(CRATES),clean$(1)_H_$(2)-lib-$$(crate)) \
$$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_H_$(2)-tool-$$(tool))
$$(Q)rm -fr $(2)/rt/libbacktrace
clean$(1)_H_$(2)-tool-%:
$$(Q)rm -f $$(HBIN$(1)_H_$(2))/$$*$$(X_$(2))
clean$(1)_H_$(2)-lib-%:
$$(Q)rm -f $$(HLIB$(1)_H_$(2))/$$(call CFG_LIB_GLOB_$(2),$$*)
$$(Q)rm -f $$(HLIB$(1)_H_$(2))/$$(call CFG_RLIB_GLOB,$$*)
endef
$(foreach host, $(CFG_HOST), \
$(eval $(foreach stage, $(STAGES), \
$(eval $(call CLEAN_HOST_STAGE_N,$(stage),$(host))))))
define CLEAN_TARGET_STAGE_N
clean$(1)_T_$(2)_H_$(3): \
$$(foreach crate,$$(CRATES),clean$(1)_T_$(2)_H_$(3)-lib-$$(crate)) \
$$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_T_$(2)_H_$(3)-tool-$$(tool))
$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/libcompiler-rt.a
$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/librun_pass_stage* # For unix
$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/run_pass_stage* # For windows
clean$(1)_T_$(2)_H_$(3)-tool-%:
$$(Q)rm -f $$(TBIN$(1)_T_$(2)_H_$(3))/$$*$$(X_$(2))
clean$(1)_T_$(2)_H_$(3)-lib-%:
$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/$$(call CFG_LIB_GLOB_$(2),$$*)
$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/$$(call CFG_RLIB_GLOB,$$*)
endef
$(foreach host, $(CFG_HOST), \
$(eval $(foreach target, $(CFG_TARGET), \
$(eval $(foreach stage, 0 1 2 3, \
$(eval $(call CLEAN_TARGET_STAGE_N,$(stage),$(target),$(host))))))))