Add ASAN guards to some asm data structures

libc/log/countbranch_data.S

@@ -22,6 +22,7 @@
 
 	.section .sort.data.countbranch.1,"a",@progbits
 	.align	8
+	.underrun
 	.globl	countbranch_data
 countbranch_data:
 	.previous
@@ -31,4 +32,5 @@ countbranch_data:
 	.rept	5
 	.quad	-1
 	.endr
+	.overrun
 	.previous

libc/log/countexpr_data.S

@@ -24,10 +24,12 @@
 	.section .sort.data.countexpr.1,"a",@progbits
 	.align	8
 	.globl	countexpr_data
+	.underrun
 countexpr_data:
 	.previous
 
 	.section .sort.data.countexpr.3,"a",@progbits
 	.align	8
 	.quad	0
+	.overrun
 	.previous

libc/nt/master.sh

@@ -1,4 +1,4 @@
-/usr/bin/env echo   ' -*- mode:sh; indent-tabs-mode:nil; tab-width:8; coding:utf-8 -*-│
+/usr/bin/env echo ' -*-mode:sh;indent-tabs-mode:nil;tab-width:8;coding:utf-8-*-│
 │vi: set net ft=sh ts=2 sts=2 sw=2 fenc=utf-8                               :vi│
 ╞══════════════════════════════════════════════════════════════════════════════╡
 │ Copyright 2020 Justine Alexandra Roberts Tunney                              │

libc/runtime/init.S

@@ -84,6 +84,7 @@ _woot:	leave
 	.globl	__init_rodata_start,__init_rodata_end
 	.hidden	__init_rodata_start,__init_rodata_end
 	.align	__SIZEOF_POINTER__
+	.underrun
 __init_rodata_start:
 	.previous/*
 	...
@@ -92,6 +93,7 @@ __init_rodata_start:
 	*/.section .initroepilogue,"a",@progbits
 __init_rodata_end:
 	.byte	0x90
+	.overrun
 	.previous
 
 //	Decentralized section for unpacked data structures.
@@ -107,6 +109,7 @@ __init_rodata_end:
 	.globl	__init_bss_start,__init_bss_end
 	.hidden	__init_bss_start,__init_bss_end
 	.align	__SIZEOF_POINTER__
+	.underrun
 __init_bss_start:
 	.previous/*
 	...
@@ -115,6 +118,7 @@ __init_bss_start:
 	*/.section .piro.bss.init.3,"aw",@nobits
 __init_bss_end:
 	.byte	0
+	.overrun
 	.previous
 
 //	Special area for Windows NT support code.

libc/testlib/bench.S

@@ -29,6 +29,7 @@
 	.hidden	__bench_start,__bench_end
 	.byte	0
 	.align	__SIZEOF_POINTER__
+	.underrun
 __bench_start:
 	.previous/*
 	...
@@ -37,4 +38,5 @@ __bench_start:
 	*/.section .piro.relo.sort.bench.3,"aw",@nobits
 __bench_end:
 	.quad	0
+	.overrun
 	.previous

libc/testlib/blocktronics.S

@@ -20,11 +20,12 @@
 .rodata
 
 //	Nontrivial NUL-terminated string test vector.
-	.align	1
+	.underrun
 kBlocktronics:
 0:	.incbin	"libc/testlib/blocktronics.txt"
 1:	.byte	0
 	.endobj	kBlocktronics,globl
+	.overrun
 
 	.align	8
 kBlocktronicsSize:

libc/testlib/combo.S

@@ -28,6 +28,7 @@
 	.hidden	__combo_start,__combo_end
 	.byte	0
 	.align	__SIZEOF_POINTER__
+	.underrun
 __combo_start:
 	.previous/*
 	...
@@ -36,4 +37,5 @@ __combo_start:
 	*/.section .piro.relo.sort.combo.3,"aw",@nobits
 __combo_end:
 	.quad	0
+	.overrun
 	.previous

libc/testlib/fixture.S

@@ -28,6 +28,7 @@
 	.hidden	__fixture_start,__fixture_end
 	.byte	0
 	.align	__SIZEOF_POINTER__
+	.underrun
 __fixture_start:
 	.previous/*
 	...
@@ -36,4 +37,5 @@ __fixture_start:
 	*/.section .piro.relo.sort.fixture.3,"aw",@nobits
 __fixture_end:
 	.quad	0
+	.overrun
 	.previous

libc/testlib/hyperion.S

@@ -20,11 +20,12 @@
 .rodata
 
 //	Nontrivial NUL-terminated string test vector.
-	.align	1
+	.underrun
 kHyperion:
 0:	.incbin	"libc/testlib/hyperion.txt"
 1:	.byte	0
 	.endobj	kHyperion,globl
+	.overrun
 
 	.align	8
 kHyperionSize:

libc/testlib/moby.S

@@ -20,11 +20,12 @@
 .rodata
 
 //	Nontrivial NUL-terminated string test vector.
-	.align	1
+	.underrun
 kMoby:
 0:	.incbin	"libc/testlib/moby.txt"
 1:	.byte	0
 	.endobj	kMoby,globl
+	.overrun
 
 	.align	8
 kMobySize:

libc/testlib/testcase.S

@@ -28,6 +28,7 @@
 	.hidden	__testcase_start,__testcase_end
 	.byte	0
 	.align	__SIZEOF_POINTER__
+	.underrun
 __testcase_start:
 	.previous/*
 	...
@@ -36,4 +37,5 @@ __testcase_start:
 	*/.section .piro.relo.sort.testcase.3,"aw",@nobits
 __testcase_end:
 	.quad	0
+	.overrun
 	.previous

libc/time/kmonthname.S

@@ -11,6 +11,7 @@
 
 //	extern const char kMonthName[12][10];
 	.section .rodata,"a",@progbits
+	.underrun
 kMonthName:
 	.ascin	"January",10
 	.ascin	"February",10
@@ -25,4 +26,5 @@ kMonthName:
 	.ascin	"November",10
 	.ascin	"December",10
 	.endobj	kMonthName,globl
+	.overrun
 	.previous

libc/time/kmonthnameshort.S

@@ -16,6 +16,7 @@
 //	  - Double-NUL Terminated String
 //	  - extern const char kMonthNameShort[];
 	.section .rodata,"a",@progbits
+	.underrun
 kMonthNameShort:
 	.ascin	"Jan",4
 	.ascin	"Feb",4
@@ -31,4 +32,5 @@ kMonthNameShort:
 	.ascin	"Dec",4
 	.byte	0
 	.endobj	kMonthNameShort,globl
+	.overrun
 	.previous

libc/time/kweekdayname.S

@@ -11,6 +11,7 @@
 
 //	extern const char kWeekdayName[7][10];
 	.section .rodata,"a",@progbits
+	.underrun
 kWeekdayName:
 	.ascin	"Sunday",10
 	.ascin	"Monday",10
@@ -20,4 +21,5 @@ kWeekdayName:
 	.ascin	"Friday",10
 	.ascin	"Saturday",10
 	.endobj	kWeekdayName,globl
+	.overrun
 	.previous

libc/time/kweekdaynameshort.S

@@ -16,6 +16,7 @@
 //	  - Double-NUL Terminated String
 //	  - extern const char kWeekdayNameShort[];
 	.section .rodata,"a",@progbits
+	.underrun
 kWeekdayNameShort:
 	.asciz	"Sun"
 	.asciz	"Mon"
@@ -26,4 +27,5 @@ kWeekdayNameShort:
 	.asciz	"Sat"
 	.byte	0
 	.endobj	kWeekdayNameShort,globl
+	.overrun
 	.previous