mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
226aaf3547
This commit makes numerous refinements to cosmopolitan memory handling.
The default stack size has been reduced from 2mb to 128kb. A new macro
is now provided so you can easily reconfigure the stack size to be any
value you want. Work around the breaking change by adding to your main:
STATIC_STACK_SIZE(0x00200000); // 2mb stack
If you're not sure how much stack you need, then you can use:
STATIC_YOINK("stack_usage_logging");
After which you can `sort -nr o/$MODE/stack.log`. Based on the unit test
suite, nothing in the Cosmopolitan repository (except for Python) needs
a stack size greater than 30kb. There are also new macros for detecting
the size and address of the stack at runtime, e.g. GetStackAddr(). We
also now support sigaltstack() so if you want to see nice looking crash
reports whenever a stack overflow happens, you can put this in main():
ShowCrashReports();
Under `make MODE=dbg` and `make MODE=asan` the unit testing framework
will now automatically print backtraces of memory allocations when
things like memory leaks happen. Bugs are now fixed in ASAN global
variable overrun detection. The memtrack and asan runtimes also handle
edge cases now. The new tools helped to identify a few memory leaks,
which are fixed by this change.
This change should fix an issue reported in #288 with ARG_MAX limits.
Fixing this doubled the performance of MKDEPS.COM and AR.COM yet again.
339 lines
6 KiB
Makefile
339 lines
6 KiB
Makefile
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
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#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
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# Default Mode
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#
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# - `make`
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# - Backtraces
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# - Function tracing
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# - Reasonably small
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# - Reasonably optimized
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# - Reasonably debuggable
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ifeq ($(MODE),)
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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$(FTRACE) \
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-Og
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TARGET_ARCH ?= \
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-msse3
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endif
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# Optimized Mode
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#
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# - `make MODE=opt`
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# - Backtraces
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# - More optimized
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# - Reasonably small
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# - No memory corruption detection
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# - assert() / CHECK_xx() may leak code into binary for debuggability
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# - GCC 8+ hoists check fails into .text.cold, thus minimizing impact
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ifeq ($(MODE), opt)
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CONFIG_CPPFLAGS += \
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-DNDEBUG \
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-msse2avx \
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-Wa,-msse2avx
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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$(FTRACE) \
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-O3
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TARGET_ARCH ?= \
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-march=native
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endif
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# Release Mode
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#
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# Follows traditional closed source release binary norms.
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#
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# - `make MODE=rel`
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# - More optimized
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# - Reasonably small
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# - Numeric backtraces
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# - Toilsome debuggability
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# - assert() statements removed
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# - DCHECK_xx() statements removed
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# - No memory corruption detection
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# - CHECK_xx() won't leak strings into binary
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ifeq ($(MODE), rel)
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CONFIG_CPPFLAGS += \
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-DNDEBUG
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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-O2
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TARGET_ARCH ?= \
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-msse3
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PYFLAGS += \
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-O1
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endif
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# Asan Mode
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#
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# Safer binaries good for backend production serving.
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#
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# - `make MODE=asan`
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# - Memory safety
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# - Production worthy
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# - Backtraces
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# - Debuggability
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# - Larger binaries
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ifeq ($(MODE), asan)
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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-O2
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CONFIG_COPTS += \
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-fsanitize=address
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TARGET_ARCH ?= \
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-msse3
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endif
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# Debug Mode
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#
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# - `make MODE=dbg`
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# - Backtraces
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# - Enables asan
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# - Enables ubsan (TODO)
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# - Stack canaries
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# - No optimization (TODO)
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# - Enormous binaries
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ifeq ($(MODE), dbg)
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CONFIG_CPPFLAGS += \
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-DMODE_DBG
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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$(FTRACE) \
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-O2 \
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-fno-inline
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CONFIG_COPTS += \
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-fsanitize=address
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TARGET_ARCH ?= \
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-msse3
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OVERRIDE_CCFLAGS += \
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-fno-pie
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endif
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# Tiny Mode
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#
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# - `make MODE=tiny`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tiny)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops \
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-fschedule-insns2 \
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-momit-leaf-frame-pointer \
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-foptimize-sibling-calls
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TARGET_ARCH ?= \
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-msse3
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PYFLAGS += \
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-O2 \
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-B
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endif
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# Linux-Only Tiny Mode
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#
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# - `make MODE=tinylinux`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No avx hooks
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# - No backtraces
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# - No portability
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tinylinux)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=1
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# Linux+BSD Tiny Mode
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#
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# - `make MODE=tinylinuxbsd`
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# - No apple
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No microsoft
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tinylinuxbsd)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=113
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# Unix Tiny Mode
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#
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# - `make MODE=tinysysv`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No microsoft
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tinysysv)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=121
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# Tiny Metallic Unix Mode
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#
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# - `make MODE=tinynowin`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No microsoft
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tinynowin)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=251
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# LLVM Mode
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ifeq ($(MODE), llvm)
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TARGET_ARCH ?= -msse3
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CONFIG_CCFLAGS += $(BACKTRACES) $(FTRACE) -O2
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AS = clang
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CC = clang
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CXX = clang++
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CXXFILT = llvm-c++filt
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LD = ld.lld
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NM = llvm-nm
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GCC = clang
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STRIP = llvm-strip
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OBJCOPY = llvm-objcopy
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OBJDUMP = llvm-objdump
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ADDR2LINE = llvm-addr2line
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endif
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# ANSI Mode
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#
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# These flags cause GCC to predefine __STRICT_ANSI__. Please be warned
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# that Cosmopolitan headers are written to comply with that request if
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# it's possible to do so. Consider the following example:
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#
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# make -j12 -O o//tool/viz/printvideo.i
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# clang-format-10 -i o//tool/viz/printvideo.i
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# less o//tool/viz/printvideo.i
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#
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# You'll notice functions like memcpy(), ioctl(), etc. get expanded into
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# wild-eyed gnu-style performance hacks. You can turn it off as follows:
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#
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# make -j12 -O MODE=ansi o/ansi/tool/viz/printvideo.i
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# clang-format-10 -i o/ansi/tool/viz/printvideo.i
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# less o/ansi/tool/viz/printvideo.i
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#
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# Here it becomes clear that ANSI mode can help you decouple your source
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# from Cosmopolitan, by turning it into plain ordinary textbook C code.
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#
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# Another potential use case is distributing code to folks using tools
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# such as MSVC or XCode. You can run your binary objects through a tool
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# like objconv to convert them to COFF or MachO. Then use ANSI mode to
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# rollup one header file that'll enable linkage with minimal issues.
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ifeq ($(MODE), ansi)
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CONFIG_CFLAGS += -std=c11
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#CONFIG_CPPFLAGS += -ansi
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CONFIG_CXXFLAGS += -std=c++11
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TARGET_ARCH ?= -msse3
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endif
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