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https://github.com/jart/cosmopolitan.git
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1ff9ab95ac
This change enables Address Sanitizer systemically w/ `make MODE=dbg`. Our version of Rust's `unsafe` keyword is named `noasan` which is used for two functions that do aligned memory chunking, like `strcpy.c` and we need to fix the tiny DEFLATE code, but that's it everything else is fabulous you can have all the fischer price security blankets you need Best of all is we're now able to use the ASAN data in Blinkenlights to colorize the memory dumps. See the screenshot below of a test program: https://justine.lol/blinkenlights/asan.png Which is operating on float arrays stored on the stack, with red areas indicating poisoned memory, and the green areas indicate valid memory.
103 lines
4.5 KiB
C
103 lines
4.5 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/mem/mem.h"
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#include "libc/runtime/internal.h"
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#include "libc/str/str.h"
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#include "libc/testlib/testlib.h"
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TEST(GetDosEnviron, testOneVariable) {
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#define kEnv u"A=Und wird die Welt auch in Flammen stehen\0"
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size_t max = 2;
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size_t size = sizeof(kEnv) >> 1;
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char *block = malloc(size);
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char16_t *env = memcpy(malloc(sizeof(kEnv)), kEnv, sizeof(kEnv));
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char **envp = malloc(max * sizeof(char *));
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EXPECT_EQ(1, GetDosEnviron(env, block, size, envp, max));
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EXPECT_STREQ("A=Und wird die Welt auch in Flammen stehen", envp[0]);
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EXPECT_EQ(NULL, envp[1]);
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ASSERT_BINEQ(u"A=Und wird die Welt auch in Flammen stehen ", block);
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free(envp);
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free(env);
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free(block);
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#undef kEnv
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}
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TEST(GetDosEnviron, testTwoVariables) {
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#define kEnv \
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(u"𐌰𐌱𐌲𐌳=Und wird die Welt auch in Flammen stehen\0" \
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u"𐌴𐌵𐌶𐌷=Wir werden wieder auferstehen\0")
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size_t max = 3;
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size_t size = 1024;
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char *block = malloc(size);
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char16_t *env = memcpy(malloc(sizeof(kEnv)), kEnv, sizeof(kEnv));
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char **envp = malloc(max * sizeof(char *));
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EXPECT_EQ(2, GetDosEnviron(env, block, size, envp, max));
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EXPECT_STREQ("𐌰𐌱𐌲𐌳=Und wird die Welt auch in Flammen stehen", envp[0]);
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EXPECT_STREQ("𐌴𐌵𐌶𐌷=Wir werden wieder auferstehen", envp[1]);
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EXPECT_EQ(NULL, envp[2]);
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free(envp);
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free(env);
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free(block);
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#undef kEnv
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}
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TEST(GetDosEnviron, testOverrun_truncatesWithGrace) {
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#define kEnv u"A=Und wird die Welt auch in Flammen stehen\0"
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size_t max = 2;
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size_t size = sizeof(kEnv) >> 2;
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char *block = malloc(size);
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char16_t *env = memcpy(malloc(sizeof(kEnv)), kEnv, sizeof(kEnv));
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char **envp = malloc(max * sizeof(char *));
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EXPECT_EQ(1, GetDosEnviron(env, block, size, envp, max));
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EXPECT_STREQ("A=Und wird die Welt ", envp[0]);
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EXPECT_EQ(NULL, envp[1]);
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ASSERT_BINEQ(u"A=Und wird die Welt ", block);
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free(envp);
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free(env);
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free(block);
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#undef kEnv
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}
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TEST(GetDosEnviron, testEmpty_doesntTouchMemory) {
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EXPECT_EQ(0, GetDosEnviron(u"", NULL, 0, NULL, 0));
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}
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TEST(GetDosEnviron, testEmpty_zeroTerminatesWheneverPossible_1) {
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size_t max = 1;
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char **envp = malloc(max * sizeof(char *));
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EXPECT_EQ(0, GetDosEnviron(u"", NULL, 0, envp, max));
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EXPECT_EQ(NULL, envp[0]);
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free(envp);
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}
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TEST(GetDosEnviron, testEmpty_zeroTerminatesWheneverPossible_2) {
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size_t size = 1;
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char *block = malloc(size);
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EXPECT_EQ(0, GetDosEnviron(u"", block, size, NULL, 0));
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EXPECT_BINEQ(u" ", block);
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free(block);
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}
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TEST(GetDosEnviron, testEmpty_zeroTerminatesWheneverPossible_3) {
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size_t size = 2;
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char *block = malloc(size);
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EXPECT_EQ(0, GetDosEnviron(u"", block, size, NULL, 0));
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EXPECT_BINEQ(u" ", block);
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free(block);
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}
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