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Expose public garbage collector API for C language

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You can now do epic things like this:

    puts(_gc(xasprintf("%d", 123)));

The _gc() API is shorthand for _defer() which works like Go's keyword:

    const char *s = xasprintf("%d", 123);
    _defer(free, s);
    puts(s);

Be sure to always use -fno-omit-frame-pointer which makes code fast too.

Enjoy! See also #114
This commit is contained in:
Justine Tunney 2021-03-08 10:56:09 -08:00
parent 0ad609268f
commit 33e8fc8687
26 changed files with 192 additions and 182 deletions
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25
libc/runtime/stackchkfail.c
View file

@ -50,21 +50,22 @@ privileged noasan void __stack_chk_fail(void) {
: "=S"(si), "=c"(cx)
: "0"(msg), "1"(len), "d"(0x3F8 /* COM1 */)
: "memory");
triplf();
asm("push\t$0\n\t"
"push\t$0\n\t"
"cli\n\t"
"lidt\t(%rsp)");
for (;;) asm("ud2");
}
if (NtGetVersion() < kNtVersionFuture) {
do {
asm volatile(
"syscall"
: "=a"(ax), "=c"(cx)
: "0"(NtGetVersion() < kNtVersionWindows8
? 0x0029
: NtGetVersion() < kNtVersionWindows81
? 0x002a
: NtGetVersion() < kNtVersionWindows10 ? 0x002b
: 0x002c),
"1"(pushpop(-1L)), "d"(42)
: "r11", "cc", "memory");
asm volatile("syscall"
: "=a"(ax), "=c"(cx)
: "0"(NtGetVersion() < kNtVersionWindows8 ? 0x0029
: NtGetVersion() < kNtVersionWindows81 ? 0x002a
: NtGetVersion() < kNtVersionWindows10 ? 0x002b
: 0x002c),
"1"(pushpop(-1L)), "d"(42)
: "r11", "cc", "memory");
} while (!ax);
}
for (;;) {