Slim down static binaries by avoiding stdio.
It's okay for a program to choose to drag in stdio, but it's unfortunate
if even the minimal "int main() { return 42; }" drags in stdio...
This brings the minimal static binary on ARM down from 78KiB to 46KiB.
Given that we don't have a separate -lpthread it's not obvious to me that
we can shave this down any further. I'm not sure whether this is a worthwhile
change for that reason. (And the fact that dynamic binaries, the usual case,
are unaffected either way.)
Change-Id: I02f91dcff37d14354314a30b72fed2563f431c88
diff --git a/libc/bionic/malloc_debug_qemu.cpp b/libc/bionic/malloc_debug_qemu.cpp
index d0069e1..b3b604d 100644
--- a/libc/bionic/malloc_debug_qemu.cpp
+++ b/libc/bionic/malloc_debug_qemu.cpp
@@ -1053,7 +1053,7 @@
}
extern "C" void* qemu_instrumented_pvalloc(size_t bytes) {
- size_t pagesize = sysconf(_SC_PAGESIZE);
+ size_t pagesize = getpagesize();
size_t size = BIONIC_ALIGN(bytes, pagesize);
if (size < bytes) { // Overflow
qemu_error_log("<libc_pid=%03u, pid=%03u> pvalloc(%zu): overflow (%zu).",
@@ -1064,5 +1064,5 @@
}
extern "C" void* qemu_instrumented_valloc(size_t size) {
- return qemu_instrumented_memalign(sysconf(_SC_PAGESIZE), size);
+ return qemu_instrumented_memalign(getpagesize(), size);
}