Make improvements

- Introduce portable sched_getcpu() api
- Support GCC's __target_clones__ feature
- Make fma() go faster on x86 in default mode
- Remove some asan checks from core libraries
- WinMain() now ensures $HOME and $USER are defined

libc/log/addr2linepath.c

@@ -36,7 +36,7 @@ static struct {
   char buf[PATH_MAX];
 } g_addr2line;
 
-const void GetAddr2linePathInit(void) {
+void GetAddr2linePathInit(void) {
   int e = errno;
   const char *path;
   if (!(path = getenv("ADDR2LINE"))) {

libc/log/cxaprintexits.c

@@ -48,10 +48,10 @@ void __cxa_printexits(FILE *f, void *pred) {
           if (symbol) {
             snprintf(name, sizeof(name), "%s", symbol);
           } else {
-            snprintf(name, sizeof(name), "0x%016lx", b->p[i].fp);
+            snprintf(name, sizeof(name), "0x%016lx", (unsigned long)b->p[i].fp);
           }
-          fprintf(f, "%-22s 0x%016lx 0x%016lx\n", name, b->p[i].arg,
-                  b->p[i].pred);
+          fprintf(f, "%-22s 0x%016lx 0x%016lx\n", name,
+                  (unsigned long)b->p[i].arg, (unsigned long)b->p[i].pred);
         }
       }
     } while ((b = b->next));

libc/log/die.c

@@ -20,6 +20,7 @@
 #include "libc/errno.h"
 #include "libc/intrin/describebacktrace.internal.h"
 #include "libc/intrin/kprintf.h"
+#include "libc/log/backtrace.internal.h"
 #include "libc/log/internal.h"
 #include "libc/runtime/runtime.h"
 #include "libc/runtime/symbols.internal.h"
@@ -51,5 +52,6 @@ relegated wontreturn void __die(void) {
           __nocolor ? "" : "\e[1;31m", program_invocation_short_name, host,
           getpid(), gettid(), __nocolor ? "" : "\e[0m", FindDebugBinary(),
           DescribeBacktrace(__builtin_frame_address(0)));
+  ShowBacktrace(2, __builtin_frame_address(0));
   _Exit(77);
 }

libc/log/gdbexec.c

@@ -41,7 +41,7 @@ relegated int(gdbexec)(const char *cmd) {
     elf = "-q";
   }
   bp = __builtin_frame_address(0);
-  sprintf(breakcmd, "%s *%#p", "break", bp->addr);
+  sprintf(breakcmd, "%s *%#lx", "break", (unsigned long)bp->addr);
   if (!(pid = vfork())) {
     execv(gdb, (char *const[]){
                    "gdb",

libc/log/oncrash_amd64.c

@@ -252,16 +252,9 @@ static relegated void ShowCrashReport(int err, int sig, struct siginfo *si,
 }
 
 relegated void __oncrash(int sig, struct siginfo *si, void *arg) {
-  ucontext_t *ctx = arg;
-  int gdbpid, err;
-  err = errno;
-  if ((gdbpid = IsDebuggerPresent(true))) {
-    DebugBreak();
-  }
-  if (!(gdbpid > 0 && (sig == SIGTRAP || sig == SIGQUIT))) {
-    __restore_tty();
-    ShowCrashReport(err, sig, si, ctx);
-  }
+  int err = errno;
+  __restore_tty();
+  ShowCrashReport(err, sig, si, arg);
 }
 
 #endif /* __x86_64__ */