mirror of
https://github.com/rust-lang/rust
synced 2024-09-19 08:22:55 +00:00
7a3fdfbf67
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)
120 lines
3.6 KiB
Makefile
120 lines
3.6 KiB
Makefile
# Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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# file at the top-level directory of this distribution and at
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# http://rust-lang.org/COPYRIGHT.
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#
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# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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# option. This file may not be copied, modified, or distributed
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# except according to those terms.
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######################################################################
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# Cleanup
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######################################################################
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CLEAN_STAGE_RULES := \
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$(foreach stage, $(STAGES), \
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$(foreach host, $(CFG_HOST), \
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clean$(stage)_H_$(host) \
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$(foreach target, $(CFG_TARGET), \
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clean$(stage)_T_$(target)_H_$(host))))
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CLEAN_STAGE_RULES := $(CLEAN_STAGE_RULES) \
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$(foreach host, $(CFG_HOST), clean-generic-H-$(host))
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CLEAN_STAGE_RULES := $(CLEAN_STAGE_RULES) \
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$(foreach host, $(CFG_TARGET), clean-generic-T-$(host))
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CLEAN_LLVM_RULES = \
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$(foreach target, $(CFG_HOST), \
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clean-llvm$(target))
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.PHONY: clean clean-all clean-misc clean-llvm
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clean-all: clean clean-llvm
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clean-llvm: $(CLEAN_LLVM_RULES)
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clean: clean-misc $(CLEAN_STAGE_RULES)
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clean-misc:
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@$(call E, cleaning)
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$(Q)rm -f $(RUNTIME_OBJS) $(RUNTIME_DEF)
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$(Q)rm -f $(RUSTLLVM_LIB_OBJS) $(RUSTLLVM_OBJS_OBJS) $(RUSTLLVM_DEF)
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$(Q)rm -Rf $(GENERATED)
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$(Q)rm -Rf tmp/*
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$(Q)rm -Rf rust-stage0-*.tar.bz2 $(PKG_NAME)-*.tar.gz $(PKG_NAME)-*.exe
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$(Q)rm -Rf dist/*
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$(Q)rm -Rf doc
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define CLEAN_GENERIC
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clean-generic-$(2)-$(1):
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$(Q)find $(1)/rustllvm \
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$(1)/rt \
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$(1)/test \
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$(1)/stage* \
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-type f \( \
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-name '*.[odasS]' -o \
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-name '*.so' -o \
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-name '*.dylib' -o \
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-name '*.rlib' -o \
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-name 'stamp.*' -o \
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-name '*.lib' -o \
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-name '*.dll' -o \
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-name '*.def' -o \
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-name '*.py' -o \
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-name '*.pyc' -o \
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-name '*.bc' \
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\) \
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| xargs rm -f
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$(Q)find $(1) \
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-name '*.dSYM' \
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| xargs rm -Rf
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endef
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$(foreach host, $(CFG_HOST), $(eval $(call CLEAN_GENERIC,$(host),H)))
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$(foreach targ, $(CFG_TARGET), $(eval $(call CLEAN_GENERIC,$(targ),T)))
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define CLEAN_HOST_STAGE_N
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clean$(1)_H_$(2): \
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$$(foreach crate,$$(CRATES),clean$(1)_H_$(2)-lib-$$(crate)) \
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$$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_H_$(2)-tool-$$(tool))
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$$(Q)rm -fr $(2)/rt/libbacktrace
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clean$(1)_H_$(2)-tool-%:
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$$(Q)rm -f $$(HBIN$(1)_H_$(2))/$$*$$(X_$(2))
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clean$(1)_H_$(2)-lib-%:
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$$(Q)rm -f $$(HLIB$(1)_H_$(2))/$$(call CFG_LIB_GLOB_$(2),$$*)
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$$(Q)rm -f $$(HLIB$(1)_H_$(2))/$$(call CFG_RLIB_GLOB,$$*)
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endef
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$(foreach host, $(CFG_HOST), \
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$(eval $(foreach stage, $(STAGES), \
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$(eval $(call CLEAN_HOST_STAGE_N,$(stage),$(host))))))
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define CLEAN_TARGET_STAGE_N
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clean$(1)_T_$(2)_H_$(3): \
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$$(foreach crate,$$(CRATES),clean$(1)_T_$(2)_H_$(3)-lib-$$(crate)) \
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$$(foreach tool,$$(TOOLS) $$(DEBUGGER_BIN_SCRIPTS_ALL),clean$(1)_T_$(2)_H_$(3)-tool-$$(tool))
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$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/libcompiler-rt.a
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$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/librun_pass_stage* # For unix
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$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/run_pass_stage* # For windows
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clean$(1)_T_$(2)_H_$(3)-tool-%:
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$$(Q)rm -f $$(TBIN$(1)_T_$(2)_H_$(3))/$$*$$(X_$(2))
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clean$(1)_T_$(2)_H_$(3)-lib-%:
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$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/$$(call CFG_LIB_GLOB_$(2),$$*)
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$$(Q)rm -f $$(TLIB$(1)_T_$(2)_H_$(3))/$$(call CFG_RLIB_GLOB,$$*)
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endef
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$(foreach host, $(CFG_HOST), \
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$(eval $(foreach target, $(CFG_TARGET), \
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$(eval $(foreach stage, 0 1 2 3, \
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$(eval $(call CLEAN_TARGET_STAGE_N,$(stage),$(target),$(host))))))))
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