Merge "Ignore all __weak_alias in OpenBSD libC."
diff --git a/libc/bionic/libc_logging.cpp b/libc/bionic/libc_logging.cpp
index 5655526..49a3762 100644
--- a/libc/bionic/libc_logging.cpp
+++ b/libc/bionic/libc_logging.cpp
@@ -75,10 +75,12 @@
len = strlen(data);
}
+ total += len;
+
while (len > 0) {
int avail = end_ - pos_;
if (avail == 0) {
- break;
+ return;
}
if (avail > len) {
avail = len;
@@ -87,11 +89,10 @@
pos_ += avail;
pos_[0] = '\0';
len -= avail;
- total += avail;
}
}
- int total;
+ size_t total;
private:
char* buffer_;
@@ -109,18 +110,19 @@
len = strlen(data);
}
+ total += len;
+
while (len > 0) {
int rc = TEMP_FAILURE_RETRY(write(fd_, data, len));
if (rc == -1) {
- break;
+ return;
}
data += rc;
len -= rc;
- total += rc;
}
}
- int total;
+ size_t total;
private:
int fd_;
diff --git a/libc/bionic/pthread_attr.cpp b/libc/bionic/pthread_attr.cpp
index 8df3bff..c93970a 100644
--- a/libc/bionic/pthread_attr.cpp
+++ b/libc/bionic/pthread_attr.cpp
@@ -116,6 +116,16 @@
static int __pthread_attr_getstack_main_thread(void** stack_base, size_t* stack_size) {
ErrnoRestorer errno_restorer;
+ rlimit stack_limit;
+ if (getrlimit(RLIMIT_STACK, &stack_limit) == -1) {
+ return errno;
+ }
+
+ // If the current RLIMIT_STACK is RLIM_INFINITY, only admit to an 8MiB stack for sanity's sake.
+ if (stack_limit.rlim_cur == RLIM_INFINITY) {
+ stack_limit.rlim_cur = 8 * 1024 * 1024;
+ }
+
// It doesn't matter which thread we are; we're just looking for "[stack]".
FILE* fp = fopen("/proc/self/maps", "re");
if (fp == NULL) {
@@ -126,17 +136,8 @@
if (ends_with(line, " [stack]\n")) {
uintptr_t lo, hi;
if (sscanf(line, "%" SCNxPTR "-%" SCNxPTR, &lo, &hi) == 2) {
- *stack_base = reinterpret_cast<void*>(lo);
- *stack_size = hi - lo;
-
- // Does our current RLIMIT_STACK mean we won't actually get everything /proc/maps promises?
- rlimit stack_limit;
- if (getrlimit(RLIMIT_STACK, &stack_limit) != -1) {
- if (*stack_size > stack_limit.rlim_cur) {
- *stack_size = stack_limit.rlim_cur;
- }
- }
-
+ *stack_size = stack_limit.rlim_cur;
+ *stack_base = reinterpret_cast<void*>(hi - *stack_size);
fclose(fp);
return 0;
}
diff --git a/libc/bionic/strerror_r.cpp b/libc/bionic/strerror_r.cpp
index 1e57cc0..d419fb1 100644
--- a/libc/bionic/strerror_r.cpp
+++ b/libc/bionic/strerror_r.cpp
@@ -1,11 +1,16 @@
/* $OpenBSD: strerror_r.c,v 1.6 2005/08/08 08:05:37 espie Exp $ */
/* Public Domain <marc@snafu.org> */
+// G++ automatically defines _GNU_SOURCE, which then means that <string.h>
+// gives us the GNU variant.
+#undef _GNU_SOURCE
+
+#include <string.h>
+
#include <errno.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
-#include <string.h>
#include "private/ErrnoRestorer.h"
#include "private/libc_logging.h"
@@ -62,6 +67,12 @@
return 0;
}
+extern "C" char* __gnu_strerror_r(int error_number, char* buf, size_t buf_len) {
+ ErrnoRestorer errno_restorer; // The glibc strerror_r doesn't set errno if it truncates...
+ strerror_r(error_number, buf, buf_len);
+ return buf; // ...and just returns whatever fit.
+}
+
extern "C" __LIBC_HIDDEN__ const char* __strsignal(int signal_number, char* buf, size_t buf_len) {
const char* signal_name = __strsignal_lookup(signal_number);
if (signal_name != NULL) {
diff --git a/libc/include/string.h b/libc/include/string.h
index 0a1d653..b0643af 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -67,8 +67,12 @@
extern char* strtok(char* __restrict, const char* __restrict);
extern char* strtok_r(char* __restrict, const char* __restrict, char** __restrict);
-extern char* strerror(int);
-extern int strerror_r(int errnum, char *buf, size_t n);
+extern char* strerror(int);
+#if defined(__USE_GNU)
+extern char* strerror_r(int, char*, size_t) __RENAME(__gnu_strerror_r);
+#else /* POSIX */
+extern int strerror_r(int, char*, size_t);
+#endif
extern size_t strnlen(const char *, size_t) __purefunc;
extern char* strncat(char* __restrict, const char* __restrict, size_t);
diff --git a/linker/debugger.cpp b/linker/debugger.cpp
index 079682c..c316151 100644
--- a/linker/debugger.cpp
+++ b/linker/debugger.cpp
@@ -170,9 +170,9 @@
if (info != NULL) {
// For a rethrown signal, this si_code will be right and the one debuggerd shows will
// always be SI_TKILL.
- snprintf(code_desc, sizeof(code_desc), ", code %d", info->si_code);
+ __libc_format_buffer(code_desc, sizeof(code_desc), ", code %d", info->si_code);
if (has_address) {
- snprintf(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
+ __libc_format_buffer(addr_desc, sizeof(addr_desc), ", fault addr %p", info->si_addr);
}
}
__libc_format_log(ANDROID_LOG_FATAL, "libc",
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 5f5823b..91ec49f 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -892,7 +892,21 @@
}
void do_android_get_LD_LIBRARY_PATH(char* buffer, size_t buffer_size) {
- snprintf(buffer, buffer_size, "%s:%s", kDefaultLdPaths[0], kDefaultLdPaths[1]);
+ // Use basic string manipulation calls to avoid snprintf.
+ // snprintf indirectly calls pthread_getspecific to get the size of a buffer.
+ // When debug malloc is enabled, this call returns 0. This in turn causes
+ // snprintf to do nothing, which causes libraries to fail to load.
+ // See b/17302493 for further details.
+ // Once the above bug is fixed, this code can be modified to use
+ // snprintf again.
+ size_t required_len = strlen(kDefaultLdPaths[0]) + strlen(kDefaultLdPaths[1]) + 2;
+ if (buffer_size < required_len) {
+ __libc_fatal("android_get_LD_LIBRARY_PATH failed, buffer too small: buffer len %zu, required len %zu",
+ buffer_size, required_len);
+ }
+ char* end = stpcpy(buffer, kDefaultLdPaths[0]);
+ *end = ':';
+ strcpy(end + 1, kDefaultLdPaths[1]);
}
void do_android_update_LD_LIBRARY_PATH(const char* ld_library_path) {
diff --git a/tests/Android.mk b/tests/Android.mk
index 5179bfa..26014ac 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -95,6 +95,7 @@
stdio_ext_test.cpp \
stdlib_test.cpp \
string_test.cpp \
+ string_posix_strerror_r_test.cpp \
strings_test.cpp \
stubs_test.cpp \
sstream_test.cpp \
diff --git a/tests/libc_logging_test.cpp b/tests/libc_logging_test.cpp
index 950161e..d4ceded 100644
--- a/tests/libc_logging_test.cpp
+++ b/tests/libc_logging_test.cpp
@@ -176,3 +176,15 @@
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif // __BIONIC__
}
+
+TEST(libc_logging, buffer_overrun) {
+#if defined(__BIONIC__)
+ char buf[BUFSIZ];
+ ASSERT_EQ(11, __libc_format_buffer(buf, sizeof(buf), "hello %s", "world"));
+ EXPECT_STREQ("hello world", buf);
+ ASSERT_EQ(11, __libc_format_buffer(buf, 8, "hello %s", "world"));
+ EXPECT_STREQ("hello w", buf);
+#else // __BIONIC__
+ GTEST_LOG_(INFO) << "This test does nothing.\n";
+#endif // __BIONIC__
+}
diff --git a/tests/pthread_test.cpp b/tests/pthread_test.cpp
index 5f74e38..6557738 100644
--- a/tests/pthread_test.cpp
+++ b/tests/pthread_test.cpp
@@ -842,8 +842,7 @@
EXPECT_EQ(stack_size, stack_size2);
// What does /proc/self/maps' [stack] line say?
- void* maps_stack_base = NULL;
- size_t maps_stack_size = 0;
+ void* maps_stack_hi = NULL;
FILE* fp = fopen("/proc/self/maps", "r");
ASSERT_TRUE(fp != NULL);
char line[BUFSIZ];
@@ -852,31 +851,25 @@
char name[10];
sscanf(line, "%" PRIxPTR "-%" PRIxPTR " %*4s %*x %*x:%*x %*d %10s", &lo, &hi, name);
if (strcmp(name, "[stack]") == 0) {
- maps_stack_base = reinterpret_cast<void*>(lo);
- maps_stack_size = hi - lo;
+ maps_stack_hi = reinterpret_cast<void*>(hi);
break;
}
}
fclose(fp);
-#if defined(__BIONIC__)
- // bionic thinks that the stack base and size should correspond to the mapped region.
- EXPECT_EQ(maps_stack_base, stack_base);
- EXPECT_EQ(maps_stack_size, stack_size);
-#else
- // glibc doesn't give the true extent for some reason.
-#endif
-
- // Both bionic and glibc agree that the high address you can compute from the returned
- // values should match what /proc/self/maps says.
- void* stack_end = reinterpret_cast<uint8_t*>(stack_base) + stack_size;
- void* maps_stack_end = reinterpret_cast<uint8_t*>(maps_stack_base) + maps_stack_size;
- EXPECT_EQ(maps_stack_end, stack_end);
-
- //
- // What if the rlimit is smaller than the stack's current extent?
- //
+ // The stack size should correspond to RLIMIT_STACK.
rlimit rl;
+ ASSERT_EQ(0, getrlimit(RLIMIT_STACK, &rl));
+ EXPECT_EQ(rl.rlim_cur, stack_size);
+
+ // The high address of the /proc/self/maps [stack] region should equal stack_base + stack_size.
+ // Remember that the stack grows down (and is mapped in on demand), so the low address of the
+ // region isn't very interesting.
+ EXPECT_EQ(maps_stack_hi, reinterpret_cast<uint8_t*>(stack_base) + stack_size);
+
+ //
+ // What if RLIMIT_STACK is smaller than the stack's current extent?
+ //
rl.rlim_cur = rl.rlim_max = 1024; // 1KiB. We know the stack must be at least a page already.
rl.rlim_max = RLIM_INFINITY;
ASSERT_EQ(0, setrlimit(RLIMIT_STACK, &rl));
@@ -889,7 +882,7 @@
ASSERT_EQ(1024U, stack_size);
//
- // What if the rlimit isn't a whole number of pages?
+ // What if RLIMIT_STACK isn't a whole number of pages?
//
rl.rlim_cur = rl.rlim_max = 6666; // Not a whole number of pages.
rl.rlim_max = RLIM_INFINITY;
diff --git a/tests/string_posix_strerror_r_test.cpp b/tests/string_posix_strerror_r_test.cpp
new file mode 100644
index 0000000..09cebfe
--- /dev/null
+++ b/tests/string_posix_strerror_r_test.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#undef _GNU_SOURCE
+
+// Old versions of glibc (like our current host prebuilt sysroot one) have
+// headers that don't work if you #undef _GNU_SOURCE, which makes it
+// impossible to build this test.
+#include <features.h>
+
+#if !defined(__GLIBC__)
+#include <string.h>
+
+#include <errno.h>
+#include <gtest/gtest.h>
+
+TEST(string, posix_strerror_r) {
+ char buf[256];
+
+ // Valid.
+ ASSERT_EQ(0, strerror_r(0, buf, sizeof(buf)));
+ ASSERT_STREQ("Success", buf);
+ ASSERT_EQ(0, strerror_r(1, buf, sizeof(buf)));
+ ASSERT_STREQ("Operation not permitted", buf);
+
+ // Invalid.
+ ASSERT_EQ(0, strerror_r(-1, buf, sizeof(buf)));
+ ASSERT_STREQ("Unknown error -1", buf);
+ ASSERT_EQ(0, strerror_r(1234, buf, sizeof(buf)));
+ ASSERT_STREQ("Unknown error 1234", buf);
+
+ // Buffer too small.
+ errno = 0;
+ memset(buf, 0, sizeof(buf));
+ ASSERT_EQ(-1, strerror_r(4567, buf, 2));
+ ASSERT_STREQ("U", buf);
+ // The POSIX strerror_r sets errno to ERANGE (the GNU one doesn't).
+ ASSERT_EQ(ERANGE, errno);
+}
+#else
+# if __GLIBC_PREREQ(2, 15)
+# error this test should work now
+# endif
+#endif
diff --git a/tests/string_test.cpp b/tests/string_test.cpp
index a3c6abb..7db8e21 100644
--- a/tests/string_test.cpp
+++ b/tests/string_test.cpp
@@ -14,6 +14,8 @@
* limitations under the License.
*/
+#define _GNU_SOURCE 1
+
#include <string.h>
#include <errno.h>
@@ -72,28 +74,34 @@
#endif // __BIONIC__
}
-TEST(string, strerror_r) {
-#if defined(__BIONIC__) // glibc's strerror_r doesn't even have the same signature as the POSIX one.
+TEST(string, gnu_strerror_r) {
char buf[256];
+ // Note that glibc doesn't necessarily write into the buffer.
+
// Valid.
- ASSERT_EQ(0, strerror_r(0, buf, sizeof(buf)));
+ ASSERT_STREQ("Success", strerror_r(0, buf, sizeof(buf)));
+#if defined(__BIONIC__)
ASSERT_STREQ("Success", buf);
- ASSERT_EQ(0, strerror_r(1, buf, sizeof(buf)));
+#endif
+ ASSERT_STREQ("Operation not permitted", strerror_r(1, buf, sizeof(buf)));
+#if defined(__BIONIC__)
ASSERT_STREQ("Operation not permitted", buf);
+#endif
// Invalid.
- ASSERT_EQ(0, strerror_r(-1, buf, sizeof(buf)));
+ ASSERT_STREQ("Unknown error -1", strerror_r(-1, buf, sizeof(buf)));
ASSERT_STREQ("Unknown error -1", buf);
- ASSERT_EQ(0, strerror_r(1234, buf, sizeof(buf)));
+ ASSERT_STREQ("Unknown error 1234", strerror_r(1234, buf, sizeof(buf)));
ASSERT_STREQ("Unknown error 1234", buf);
// Buffer too small.
- ASSERT_EQ(-1, strerror_r(0, buf, 2));
- ASSERT_EQ(ERANGE, errno);
-#else // __BIONIC__
- GTEST_LOG_(INFO) << "This test does nothing.\n";
-#endif // __BIONIC__
+ errno = 0;
+ memset(buf, 0, sizeof(buf));
+ ASSERT_EQ(buf, strerror_r(4567, buf, 2));
+ ASSERT_STREQ("U", buf);
+ // The GNU strerror_r doesn't set errno (the POSIX one sets it to ERANGE).
+ ASSERT_EQ(0, errno);
}
TEST(string, strsignal) {