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Make improvements

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- Make rand64() thread safe
- Introduce lemur64 lcg prng
- Improve strace on New Technology
- Improve msync() on New Technology
This commit is contained in:
Justine Tunney 2022-04-07 00:15:35 -07:00
parent 43ba3009b2
commit 29bf8b1a30
73 changed files with 888 additions and 269 deletions
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13
libc/log/oncrash.c
View file

@ -20,6 +20,7 @@
#include "libc/bits/weaken.h"
#include "libc/calls/internal.h"
#include "libc/calls/sigbits.h"
#include "libc/calls/strace.internal.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
@ -296,10 +297,11 @@ static wontreturn relegated noinstrument void __minicrash(int sig,
relegated noinstrument void __oncrash(int sig, struct siginfo *si,
ucontext_t *ctx) {
intptr_t rip;
int gdbpid, err;
int gdbpid, err, st, ft;
static bool noreentry, notpossible;
--g_ftrace;
if (cmpxchg(&noreentry, false, true)) {
st = __strace, __strace = 0;
ft = g_ftrace, g_ftrace = 0;
if (lockcmpxchg(&noreentry, false, true)) {
if (!__vforked) {
rip = ctx ? ctx->uc_mcontext.rip : 0;
err = errno;
@ -326,9 +328,10 @@ relegated noinstrument void __oncrash(int sig, struct siginfo *si,
}
} else if (sig == SIGTRAP) {
/* chances are IsDebuggerPresent() confused strace w/ gdb */
++g_ftrace;
g_ftrace = ft;
__strace = st;
return;
} else if (cmpxchg(&notpossible, false, true)) {
} else if (lockcmpxchg(&notpossible, false, true)) {
__minicrash(sig, si, ctx, "WHILE CRASHING");
} else {
for (;;) {