mirror of
https://github.com/jart/cosmopolitan.git
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1d8937d528
This change reduces the memory requirements of your APE Loader by 10x, in terms of virtual memory size, thanks to the help of alloca(). We're also now creating argument blocks with the same layout across systems.
74 lines
3.4 KiB
C
74 lines
3.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/dce.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/weaken.h"
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#include "libc/macros.internal.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/winargs.internal.h"
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#define UNSHADOW(x) ((int64_t)(MAX(0, (x)-0x7fff8000)) << 3)
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#define FRAME(x) ((int)((x) >> 16))
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static const char *GetFrameName(int x) {
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if (!x) {
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return "null";
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} else if (IsShadowFrame(x)) {
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return "shadow";
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} else if (IsAutoFrame(x)) {
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return "automap";
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} else if (IsFixedFrame(x)) {
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return "fixed";
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} else if (IsStaticStackFrame(x)) {
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return "stack";
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} else if (IsGfdsFrame(x)) {
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return "g_fds";
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} else if (IsZiposFrame(x)) {
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return "zipos";
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} else if (IsKmallocFrame(x)) {
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return "kmalloc";
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} else if (IsMemtrackFrame(x)) {
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return "memtrack";
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} else if (IsOldStackFrame(x)) {
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return "system stack";
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} else if (((GetStaticStackAddr(0) + GetStackSize()) >> 16) <= x &&
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x <= ((GetStaticStackAddr(0) + GetStackSize() - 1) >> 16)) {
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return "static stack";
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} else if ((int)((intptr_t)__executable_start >> 16) <= x &&
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x <= (int)(((intptr_t)_end - 1) >> 16)) {
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return "image";
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} else {
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return "unknown";
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}
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}
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const char *(DescribeFrame)(char buf[32], int x) {
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char *p;
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if (IsShadowFrame(x)) {
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ksnprintf(buf, 32, "%s %s %.8x", GetFrameName(x),
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GetFrameName(FRAME(UNSHADOW(ADDR_32_TO_48(x)))),
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FRAME(UNSHADOW(ADDR_32_TO_48(x))));
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return buf;
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} else {
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return GetFrameName(x);
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}
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}
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