mirror of
https://github.com/jart/cosmopolitan.git
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e466dd0553
This change hardens the code for opening /zip/ files using the system call interface. Thread safety and signal safety has been improved for file descriptors in general. We now document fixed addresses that are needed for low level allocations.
94 lines
3 KiB
C
94 lines
3 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/bits/bits.h"
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#include "libc/calls/internal.h"
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#include "libc/fmt/itoa.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/stdio/stdio.h"
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// clang-format off
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struct WinArgs {
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char *argv[4096];
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char *envp[4092];
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intptr_t auxv[2][2];
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char argblock[ARG_MAX / 2];
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char envblock[ARG_MAX / 2];
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};
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//#define INCREMENT roundup2pow(kAutomapSize/16)
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#define INCREMENT (64L*1024*1024*1024)
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uint64_t last;
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void plan2(uint64_t addr, uint64_t end, const char *name) {
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char sz[32];
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FormatMemorySize(sz, end-addr+1);
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printf("%08x-%08x %-6s %s\n", addr>>16, end>>16, sz, name);
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}
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void plan(uint64_t addr, uint64_t end, const char *name) {
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uint64_t incr, next;
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while (addr > last) {
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if ((incr = last % INCREMENT)) {
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incr = INCREMENT - incr;
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} else {
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incr = INCREMENT;
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}
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plan2(last,MIN(last+incr,addr)-1,"free");
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last = MIN(last+incr,addr);
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}
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while (addr <= end) {
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if (end-addr+1 <= INCREMENT) {
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plan2(addr,end,name);
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last = end + 1;
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break;
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}
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if (!(addr % INCREMENT)) {
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plan2(addr, addr + INCREMENT - 1, name);
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last = addr + INCREMENT;
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addr += INCREMENT;
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} else {
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next = INCREMENT - addr % INCREMENT + addr;
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plan2(addr, next - 1, name);
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last = next;
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addr = next;
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}
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}
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}
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int main(int argc, char *argv[]) {
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uint64_t x, y;
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plan(0x00000000, 0x00200000-1, "null");
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plan(0x00200000, 0x00400000-1, "loader");
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if (!IsWindows() || IsAtLeastWindows10()) {
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plan(0x00400000, 0x50000000-1, "image");
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plan(0x50000000, 0x7ffdffff, "arena");
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plan(0x7fff0000, 0x10007fffffff, "asan");
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} else {
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plan(0x00400000, 0x01000000-1, "image");
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}
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plan(kAutomapStart, kAutomapStart + kAutomapSize - 1, "automap");
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plan(kMemtrackStart, kMemtrackStart + kMemtrackSize - 1, "memtrack");
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plan(kFixedmapStart, kFixedmapStart + kFixedmapSize - 1, "fixedmap");
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if (IsWindows() && !IsAtLeastWindows10()) {
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plan(0x50000000, 0x7ffdffff, "arena");
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}
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x = (intptr_t)GetStaticStackAddr(0);
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y = ROUNDUP(sizeof(struct WinArgs), FRAMESIZE);
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plan(x - y, x - 1, "winargs");
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plan(x, x + GetStackSize() - 1, "stack");
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if (!IsWindows() || IsAtLeastWindows10()) {
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plan(0x7f0000000000, 0x800000000000 - 1, "kernel");
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}
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return 0;
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}
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