8048112: G1 Full GC needs to support the case when the very first region is not available
Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett.
Reviewed-by: brutisso
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# or visit www.oracle.com if you need additional information or have any
# questions.
#
################################################################
#
# This file contains helper functions for the top-level Makefile that does
# not depend on the spec.gmk file having been read. (The purpose of this
# file is ju to avoid cluttering the top-level Makefile.)
#
################################################################
ifndef _MAKEHELPERS_GMK
_MAKEHELPERS_GMK := 1
##############################
# Stuff to run at include time
##############################
# Find out which variables were passed explicitely on the make command line. These
# will be passed on to sub-makes, overriding spec.gmk settings.
MAKE_ARGS=$(foreach var,$(subst =command,,$(filter %=command,$(foreach var,$(.VARIABLES),$(var)=$(firstword $(origin $(var)))))),$(var)=$($(var)))
list_alt_overrides_with_origins=$(filter ALT_%=environment ALT_%=command,$(foreach var,$(.VARIABLES),$(var)=$(firstword $(origin $(var)))))
list_alt_overrides=$(subst =command,,$(subst =environment,,$(list_alt_overrides_with_origins)))
# Store the build times in this directory.
BUILDTIMESDIR=$(OUTPUT_ROOT)/tmp/buildtimes
# Global targets are possible to run either with or without a SPEC. The prototypical
# global target is "help".
global_targets=help
##############################
# Functions
##############################
define CheckEnvironment
# Find all environment or command line variables that begin with ALT.
$(if $(list_alt_overrides),
@$(PRINTF) "\nWARNING: You have the following ALT_ variables set:\n"
@$(PRINTF) "$(foreach var,$(list_alt_overrides),$(var)=$$$(var))\n"
@$(PRINTF) "ALT_ variables are deprecated and will be ignored. Please clean your environment.\n\n"
)
endef
### Functions for timers
# Record starting time for build of a sub repository.
define RecordStartTime
$(MKDIR) -p $(BUILDTIMESDIR)
$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_start_$1
$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_start_$1_human_readable
endef
# Record ending time and calculate the difference and store it in a
# easy to read format. Handles builds that cross midnight. Expects
# that a build will never take 24 hours or more.
define RecordEndTime
$(DATE) '+%Y %m %d %H %M %S' | $(NAWK) '{ print $$1,$$2,$$3,$$4,$$5,$$6,($$4*3600+$$5*60+$$6) }' > $(BUILDTIMESDIR)/build_time_end_$1
$(DATE) '+%Y-%m-%d %H:%M:%S' > $(BUILDTIMESDIR)/build_time_end_$1_human_readable
$(ECHO) `$(CAT) $(BUILDTIMESDIR)/build_time_start_$1` `$(CAT) $(BUILDTIMESDIR)/build_time_end_$1` $1 | \
$(NAWK) '{ F=$$7; T=$$14; if (F > T) { T+=3600*24 }; D=T-F; H=int(D/3600); \
M=int((D-H*3600)/60); S=D-H*3600-M*60; printf("%02d:%02d:%02d %s\n",H,M,S,$$15); }' \
> $(BUILDTIMESDIR)/build_time_diff_$1
endef
# Find all build_time_* files and print their contents in a list sorted
# on the name of the sub repository.
define ReportBuildTimes
$(BUILD_LOG_WRAPPER) $(PRINTF) -- "----- Build times -------\nStart %s\nEnd %s\n%s\n%s\n-------------------------\n" \
"`$(CAT) $(BUILDTIMESDIR)/build_time_start_TOTAL_human_readable`" \
"`$(CAT) $(BUILDTIMESDIR)/build_time_end_TOTAL_human_readable`" \
"`$(LS) $(BUILDTIMESDIR)/build_time_diff_* | $(GREP) -v _TOTAL | $(XARGS) $(CAT) | $(SORT) -k 2`" \
"`$(CAT) $(BUILDTIMESDIR)/build_time_diff_TOTAL`"
endef
define ResetAllTimers
$$(shell $(MKDIR) -p $(BUILDTIMESDIR) && $(RM) $(BUILDTIMESDIR)/build_time_*)
endef
define StartGlobalTimer
$(call RecordStartTime,TOTAL)
endef
define StopGlobalTimer
$(call RecordEndTime,TOTAL)
endef
### Functions for managing makefile structure (start/end of makefile and individual targets)
# Do not indent this function, this will add whitespace at the start which the caller won't handle
define GetRealTarget
$(strip $(if $(MAKECMDGOALS),$(MAKECMDGOALS),default))
endef
# Do not indent this function, this will add whitespace at the start which the caller won't handle
define LastGoal
$(strip $(lastword $(call GetRealTarget)))
endef
# Check if the current target is the final target, as specified by
# the user on the command line. If so, call AtRootMakeEnd.
define CheckIfMakeAtEnd
# Check if the current target is the last goal
$(if $(filter $@,$(call LastGoal)),$(call AtMakeEnd))
# If the target is 'foo-only', check if our goal was stated as 'foo'
$(if $(filter $@,$(call LastGoal)-only),$(call AtMakeEnd))
endef
# Hook to be called when starting to execute a top-level target
define TargetEnter
$(BUILD_LOG_WRAPPER) $(PRINTF) "## Starting $(patsubst %-only,%,$@)\n"
$(call RecordStartTime,$(patsubst %-only,%,$@))
endef
# Hook to be called when finish executing a top-level target
define TargetExit
$(call RecordEndTime,$(patsubst %-only,%,$@))
$(BUILD_LOG_WRAPPER) $(PRINTF) "## Finished $(patsubst %-only,%,$@) (build time %s)\n\n" \
"`$(CAT) $(BUILDTIMESDIR)/build_time_diff_$(patsubst %-only,%,$@) | $(CUT) -f 1 -d ' '`"
$(call CheckIfMakeAtEnd)
endef
# Hook to be called as the very first thing when running a normal build
define AtMakeStart
$(if $(findstring --jobserver,$(MAKEFLAGS)),$(error make -j is not supported, use make JOBS=n))
$(call CheckEnvironment)
@$(PRINTF) $(LOG_INFO) "Running make as '$(MAKE) $(MFLAGS) $(MAKE_ARGS)'\n"
@$(PRINTF) "Building $(PRODUCT_NAME) for target '$(call GetRealTarget)' in configuration '$(CONF_NAME)'\n\n"
$(call StartGlobalTimer)
endef
# Hook to be called as the very last thing for targets that are "top level" targets
define AtMakeEnd
[ -f $(SJAVAC_SERVER_DIR)/server.port ] && echo Stopping sjavac server && $(TOUCH) $(SJAVAC_SERVER_DIR)/server.port.stop; true
$(call StopGlobalTimer)
$(call ReportBuildTimes)
@$(PRINTF) "Finished building $(PRODUCT_NAME) for target '$(call GetRealTarget)'\n"
$(call CheckEnvironment)
endef
### Functions for parsing and setting up make options from command-line
define FatalError
# If the user specificed a "global" target (e.g. 'help'), do not exit but continue running
$$(if $$(filter-out $(global_targets),$$(call GetRealTarget)),$$(error Cannot continue))
endef
define ParseLogLevel
ifeq ($$(origin VERBOSE),undefined)
# Setup logging according to LOG (but only if VERBOSE is not given)
# If the "nofile" argument is given, act on it and strip it away
ifneq ($$(findstring nofile,$$(LOG)),)
# Reset the build log wrapper, regardless of other values
override BUILD_LOG_WRAPPER=
# COMMA is defined in spec.gmk, but that is not included yet
COMMA=,
# First try to remove ",nofile" if it exists
LOG_STRIPPED1=$$(subst $$(COMMA)nofile,,$$(LOG))
# Otherwise just remove "nofile"
LOG_STRIPPED2=$$(subst nofile,,$$(LOG_STRIPPED1))
# We might have ended up with a leading comma. Remove it
LOG_STRIPPED3=$$(strip $$(patsubst $$(COMMA)%,%,$$(LOG_STRIPPED2)))
LOG_LEVEL:=$$(LOG_STRIPPED3)
else
LOG_LEVEL:=$$(LOG)
endif
ifeq ($$(LOG_LEVEL),)
# Set LOG to "warn" as default if not set (and no VERBOSE given)
override LOG_LEVEL=warn
endif
ifeq ($$(LOG_LEVEL),warn)
VERBOSE=-s
else ifeq ($$(LOG_LEVEL),info)
VERBOSE=-s
else ifeq ($$(LOG_LEVEL),debug)
VERBOSE=
else ifeq ($$(LOG_LEVEL),trace)
VERBOSE=
else
$$(info Error: LOG must be one of: warn, info, debug or trace.)
$$(eval $$(call FatalError))
endif
else
# Provide resonable interpretations of LOG_LEVEL if VERBOSE is given.
ifeq ($(VERBOSE),)
LOG_LEVEL:=debug
else
LOG_LEVEL:=warn
endif
ifneq ($$(LOG),)
# We have both a VERBOSE and a LOG argument. This is OK only if this is a repeated call by ourselves,
# but complain if this is the top-level make call.
ifeq ($$(MAKELEVEL),0)
$$(info Cannot use LOG=$$(LOG) and VERBOSE=$$(VERBOSE) at the same time. Choose one.)
$$(eval $$(call FatalError))
endif
endif
endif
endef
define ParseConfAndSpec
ifneq ($$(filter-out $(global_targets),$$(call GetRealTarget)),)
# If we only have global targets, no need to bother with SPEC or CONF
ifneq ($$(origin SPEC),undefined)
# We have been given a SPEC, check that it works out properly
ifeq ($$(wildcard $$(SPEC)),)
$$(info Cannot locate spec.gmk, given by SPEC=$$(SPEC))
$$(eval $$(call FatalError))
endif
ifneq ($$(origin CONF),undefined)
# We also have a CONF argument. This is OK only if this is a repeated call by ourselves,
# but complain if this is the top-level make call.
ifeq ($$(MAKELEVEL),0)
$$(info Cannot use CONF=$$(CONF) and SPEC=$$(SPEC) at the same time. Choose one.)
$$(eval $$(call FatalError))
endif
endif
# ... OK, we're satisfied, we'll use this SPEC later on
else
# Find all spec.gmk files in the build output directory
output_dir=$$(root_dir)/build
all_spec_files=$$(wildcard $$(output_dir)/*/spec.gmk)
ifeq ($$(all_spec_files),)
$$(info No configurations found for $$(root_dir)! Please run configure to create a configuration.)
$$(eval $$(call FatalError))
endif
# Extract the configuration names from the path
all_confs=$$(patsubst %/spec.gmk,%,$$(patsubst $$(output_dir)/%,%,$$(all_spec_files)))
ifneq ($$(origin CONF),undefined)
# User have given a CONF= argument.
ifeq ($$(CONF),)
# If given CONF=, match all configurations
matching_confs=$$(strip $$(all_confs))
else
# Otherwise select those that contain the given CONF string
matching_confs=$$(strip $$(foreach var,$$(all_confs),$$(if $$(findstring $$(CONF),$$(var)),$$(var))))
endif
ifeq ($$(matching_confs),)
$$(info No configurations found matching CONF=$$(CONF))
$$(info Available configurations:)
$$(foreach var,$$(all_confs),$$(info * $$(var)))
$$(eval $$(call FatalError))
else
ifeq ($$(words $$(matching_confs)),1)
$$(info Building '$$(matching_confs)' (matching CONF=$$(CONF)))
else
$$(info Building target '$(call GetRealTarget)' in the following configurations (matching CONF=$$(CONF)):)
$$(foreach var,$$(matching_confs),$$(info * $$(var)))
endif
endif
# Create a SPEC definition. This will contain the path to one or more spec.gmk files.
SPEC=$$(addsuffix /spec.gmk,$$(addprefix $$(output_dir)/,$$(matching_confs)))
else
# No CONF or SPEC given, check the available configurations
ifneq ($$(words $$(all_spec_files)),1)
$$(info No CONF given, but more than one configuration found in $$(output_dir).)
$$(info Available configurations:)
$$(foreach var,$$(all_confs),$$(info * $$(var)))
$$(info Please retry building with CONF=<config pattern> (or SPEC=<specfile>))
$$(eval $$(call FatalError))
endif
# We found exactly one configuration, use it
SPEC=$$(strip $$(all_spec_files))
endif
endif
endif
endef
### Convenience functions from Main.gmk
# Cleans the component given as $1
define CleanComponent
@$(PRINTF) "Cleaning $1 build artifacts ..."
@($(CD) $(OUTPUT_ROOT) && $(RM) -r $1)
@$(PRINTF) " done\n"
endef
endif # _MAKEHELPERS_GMK