mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +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.
282 lines
6.2 KiB
ArmAsm
282 lines
6.2 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/macros.internal.h"
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.source __FILE__
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.rodata.cst4
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__asan_option_detect_stack_use_after_return:
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.long 0
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.endobj __asan_option_detect_stack_use_after_return,globl
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.previous
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__asan_report_load1:
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push $1
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jmp 1f
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.endfn __asan_report_load1,globl
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__asan_report_load2:
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push $2
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jmp 1f
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.endfn __asan_report_load2,globl
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__asan_report_load4:
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push $4
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jmp 1f
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.endfn __asan_report_load4,globl
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__asan_report_load8:
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push $8
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jmp 1f
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.endfn __asan_report_load8,globl
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__asan_report_load16:
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push $16
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jmp 1f
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.endfn __asan_report_load16,globl
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__asan_report_load32:
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push $32
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1: pop %rsi
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0: jmp __asan_report_load
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.endfn __asan_report_load32,globl
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__asan_report_load_n:
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jmp 0b
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.endfn __asan_report_load_n,globl
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__asan_report_store1:
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push $1
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jmp 1f
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.endfn __asan_report_store1,globl
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__asan_report_store2:
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push $2
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jmp 1f
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.endfn __asan_report_store2,globl
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__asan_report_store4:
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push $4
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jmp 1f
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.endfn __asan_report_store4,globl
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__asan_report_store8:
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push $8
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jmp 1f
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.endfn __asan_report_store8,globl
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__asan_report_store16:
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push $16
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jmp 1f
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.endfn __asan_report_store16,globl
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__asan_report_store32:
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push $32
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1: pop %rsi
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0: jmp __asan_report_store
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.endfn __asan_report_store32,globl
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__asan_report_store_n:
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jmp 0b
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.endfn __asan_report_store_n,globl
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__asan_stack_free_0:
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push $0
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jmp 1f
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.endfn __asan_stack_free_0,globl
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__asan_stack_free_1:
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push $1
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jmp 1f
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.endfn __asan_stack_free_1,globl
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__asan_stack_free_2:
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push $2
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jmp 1f
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.endfn __asan_stack_free_2,globl
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__asan_stack_free_3:
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push $3
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jmp 1f
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.endfn __asan_stack_free_3,globl
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__asan_stack_free_4:
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push $4
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jmp 1f
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.endfn __asan_stack_free_4,globl
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__asan_stack_free_5:
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push $5
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.endfn __asan_stack_free_5,globl
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__asan_stack_free_hop:
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1: pop %rdx
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jmp __asan_stack_free
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.endfn __asan_report_store_n,globl
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__asan_stack_free_6:
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push $6
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jmp 1b
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.endfn __asan_stack_free_6,globl
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__asan_stack_free_7:
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push $7
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jmp 1b
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.endfn __asan_stack_free_7,globl
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__asan_stack_free_8:
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push $8
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jmp 1b
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.endfn __asan_stack_free_8,globl
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__asan_stack_free_9:
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push $9
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jmp 1b
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.endfn __asan_stack_free_9,globl
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__asan_stack_free_10:
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push $10
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jmp 1b
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.endfn __asan_stack_free_10,globl
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__asan_stack_malloc_0:
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push $0
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jmp 1f
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.endfn __asan_stack_malloc_0,globl
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__asan_stack_malloc_1:
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push $1
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jmp 1f
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.endfn __asan_stack_malloc_1,globl
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__asan_stack_malloc_2:
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push $2
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jmp 1f
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.endfn __asan_stack_malloc_2,globl
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__asan_stack_malloc_3:
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push $3
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jmp 1f
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.endfn __asan_stack_malloc_3,globl
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__asan_stack_malloc_4:
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push $4
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jmp 1f
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.endfn __asan_stack_malloc_4,globl
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__asan_stack_malloc_5:
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push $5
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jmp 1f
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.endfn __asan_stack_malloc_5,globl
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__asan_stack_malloc_hop:
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1: pop %rsi
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jmp __asan_stack_malloc
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.endfn __asan_report_store_n,globl
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__asan_stack_malloc_6:
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push $6
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jmp 1b
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.endfn __asan_stack_malloc_6,globl
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__asan_stack_malloc_7:
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push $7
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jmp 1b
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.endfn __asan_stack_malloc_7,globl
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__asan_stack_malloc_8:
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push $8
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jmp 1b
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.endfn __asan_stack_malloc_8,globl
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__asan_stack_malloc_9:
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push $9
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jmp 1b
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.endfn __asan_stack_malloc_9,globl
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__asan_stack_malloc_10:
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push $10
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jmp 1b
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.endfn __asan_stack_malloc_10,globl
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__asan_version_mismatch_check_v8:
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ret
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.endfn __asan_version_mismatch_check_v8,globl
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// Initializes Address Sanitizer runtime earlier if linked.
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.init.start 301,_init_asan
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push %rdi
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push %rsi
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mov %r12,%rdi
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mov %r13,%rsi
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mov %r14,%rdx
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mov %r15,%rcx
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call __asan_init
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pop %rsi
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pop %rdi
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.init.end 301,_init_asan
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__asan_before_dynamic_init:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_before_dynamic_init,globl
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__asan_after_dynamic_init:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_after_dynamic_init,globl
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__asan_load1:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load1,globl
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__asan_load2:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load2,globl
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__asan_load4:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load4,globl
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__asan_load8:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load8,globl
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__asan_load16:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load16,globl
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__asan_load32:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_load32,globl
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__asan_store1:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store1,globl
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__asan_store2:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store2,globl
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__asan_store4:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store4,globl
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__asan_store8:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store8,globl
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__asan_store16:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store16,globl
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__asan_store32:
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push %rbp
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mov %rsp,%rbp
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ud2
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.endfn __asan_store32,globl
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