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-rw-r--r--src/common/CMakeLists.txt6
-rw-r--r--src/common/aligned.c139
-rw-r--r--src/common/aligned.h41
-rw-r--r--tests/unit_tests/CMakeLists.txt3
-rw-r--r--tests/unit_tests/aligned.cpp86
5 files changed, 272 insertions, 3 deletions
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index f0df05b0d..c6bac2199 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -38,7 +38,8 @@ set(common_sources
password.cpp
perf_timer.cpp
threadpool.cpp
- updates.cpp)
+ updates.cpp
+ aligned.c)
if (STACK_TRACE)
list(APPEND common_sources stack_trace.cpp)
@@ -67,7 +68,8 @@ set(common_private_headers
perf_timer.h
stack_trace.h
threadpool.h
- updates.h)
+ updates.h
+ aligned.h)
monero_private_headers(common
${common_private_headers})
diff --git a/src/common/aligned.c b/src/common/aligned.c
new file mode 100644
index 000000000..763dfd0e7
--- /dev/null
+++ b/src/common/aligned.c
@@ -0,0 +1,139 @@
+// Copyright (c) 2017-2018, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+// conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+// of conditions and the following disclaimer in the documentation and/or other
+// materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+// used to endorse or promote products derived from this software without specific
+// prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#include "aligned.h"
+
+static inline int is_power_of_2(size_t n) { return n && (n & (n-1)) == 0; }
+
+#define MAGIC 0xaa0817161500ff81
+#define MAGIC_FREED 0xaa0817161500ff82
+
+static void local_abort(const char *msg)
+{
+ fprintf(stderr, "%s\n", msg);
+#ifdef NDEBUG
+ _exit(1);
+#else
+ abort();
+#endif
+}
+
+typedef struct
+{
+ uint64_t magic;
+ void *raw;
+ size_t bytes;
+ size_t align;
+} control;
+
+void *aligned_malloc(size_t bytes, size_t align)
+{
+ void *raw, *ptr;
+ control *ctrl;
+
+ if (!is_power_of_2(align))
+ return NULL;
+ if (bytes > (size_t)-1 - align)
+ return NULL;
+ if (bytes + align > (size_t)-1 - sizeof(control))
+ return NULL;
+
+ raw = malloc(bytes + sizeof(control) + align);
+ if (!raw)
+ return NULL;
+ ptr = (void*)(((uintptr_t)raw + align + sizeof(control) - 1) & ~(align-1));
+ ctrl = ((control*)ptr) - 1;
+ ctrl->magic = MAGIC;
+ ctrl->raw = raw;
+ ctrl->bytes = bytes;
+ ctrl->align = align;
+ return ptr;
+}
+
+void *aligned_realloc(void *ptr, size_t bytes, size_t align)
+{
+ void *raw, *ptr2;
+ control *ctrl, *ctrl2;
+
+ if (!ptr)
+ return aligned_malloc(bytes, align);
+ if (!bytes)
+ {
+ aligned_free(ptr);
+ return NULL;
+ }
+ if (!is_power_of_2(align))
+ return NULL;
+
+ ctrl = ((control*)ptr) - 1;
+ if (ctrl->magic == MAGIC_FREED)
+ local_abort("Double free detected");
+ if (ctrl->magic != MAGIC)
+ local_abort("Freeing unallocated memory");
+ if (ctrl->align != align)
+ return NULL;
+ if (ctrl->bytes >= bytes)
+ return ptr;
+
+ if (ctrl->bytes > (size_t)-1 - ctrl->align)
+ return NULL;
+ if (ctrl->bytes + ctrl->align > (size_t)-1 - sizeof(control))
+ return NULL;
+
+ raw = malloc(bytes + sizeof(control) + ctrl->align);
+ if (!raw)
+ return NULL;
+ ptr2 = (void*)(((uintptr_t)raw + ctrl->align + sizeof(control) - 1) & ~(ctrl->align-1));
+ memcpy(ptr2, ptr, ctrl->bytes);
+ ctrl2 = ((control*)ptr2) - 1;
+ ctrl2->magic = MAGIC;
+ ctrl2->raw = raw;
+ ctrl2->bytes = bytes;
+ ctrl2->align = ctrl->align;
+ ctrl->magic = MAGIC_FREED;
+ free(ctrl->raw);
+ return ptr2;
+}
+
+void aligned_free(void *ptr)
+{
+ if (!ptr)
+ return;
+ control *ctrl = ((control*)ptr) - 1;
+ if (ctrl->magic == MAGIC_FREED)
+ local_abort("Double free detected");
+ if (ctrl->magic != MAGIC)
+ local_abort("Freeing unallocated memory");
+ ctrl->magic = MAGIC_FREED;
+ free(ctrl->raw);
+}
diff --git a/src/common/aligned.h b/src/common/aligned.h
new file mode 100644
index 000000000..fed3ccb36
--- /dev/null
+++ b/src/common/aligned.h
@@ -0,0 +1,41 @@
+// Copyright (c) 2018, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+// conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+// of conditions and the following disclaimer in the documentation and/or other
+// materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+// used to endorse or promote products derived from this software without specific
+// prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void *aligned_malloc(size_t bytes, size_t align);
+void *aligned_realloc(void *ptr, size_t bytes, size_t align);
+void aligned_free(void *ptr);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/tests/unit_tests/CMakeLists.txt b/tests/unit_tests/CMakeLists.txt
index cdb741699..741bb1882 100644
--- a/tests/unit_tests/CMakeLists.txt
+++ b/tests/unit_tests/CMakeLists.txt
@@ -79,7 +79,8 @@ set(unit_tests_sources
vercmp.cpp
ringdb.cpp
wipeable_string.cpp
- is_hdd.cpp)
+ is_hdd.cpp
+ aligned.cpp)
set(unit_tests_headers
unit_tests_utils.h)
diff --git a/tests/unit_tests/aligned.cpp b/tests/unit_tests/aligned.cpp
new file mode 100644
index 000000000..ad4837bec
--- /dev/null
+++ b/tests/unit_tests/aligned.cpp
@@ -0,0 +1,86 @@
+// Copyright (c) 2018, The Monero Project
+//
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without modification, are
+// permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this list of
+// conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice, this list
+// of conditions and the following disclaimer in the documentation and/or other
+// materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its contributors may be
+// used to endorse or promote products derived from this software without specific
+// prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
+// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#include "gtest/gtest.h"
+
+#include "common/aligned.h"
+
+TEST(aligned, large_null) { ASSERT_TRUE(aligned_malloc((size_t)-1, 1) == NULL); }
+TEST(aligned, free_null) { aligned_free(NULL); }
+TEST(aligned, zero) { void *ptr = aligned_malloc(0, 1); ASSERT_TRUE(ptr); aligned_free(ptr); }
+TEST(aligned, aligned1) { void *ptr = aligned_malloc(1, 1); ASSERT_TRUE(ptr); aligned_free(ptr); }
+TEST(aligned, aligned4096) { void *ptr = aligned_malloc(1, 4096); ASSERT_TRUE(ptr && ((uintptr_t)ptr & 4095) == 0); aligned_free(ptr); }
+TEST(aligned, aligned8) { void *ptr = aligned_malloc(1, 8); ASSERT_TRUE(ptr && ((uintptr_t)ptr & 7) == 0); aligned_free(ptr); }
+TEST(aligned, realloc_null) { void *ptr = aligned_realloc(NULL, 1, 4096); ASSERT_TRUE(ptr && ((uintptr_t)ptr & 4095) == 0); aligned_free(ptr); }
+TEST(aligned, realloc_diff_align) { void *ptr = aligned_malloc(1, 4096); ASSERT_TRUE(!aligned_realloc(ptr, 1, 2048)); aligned_free(ptr); }
+TEST(aligned, realloc_same) { void *ptr = aligned_malloc(1, 4096), *ptr2 = aligned_realloc(ptr, 1, 4096); ASSERT_TRUE(ptr == ptr2); aligned_free(ptr2); }
+TEST(aligned, realloc_larger) { void *ptr = aligned_malloc(1, 4096), *ptr2 = aligned_realloc(ptr, 2, 4096); ASSERT_TRUE(ptr != ptr2); aligned_free(ptr2); }
+TEST(aligned, realloc_zero) { void *ptr = aligned_malloc(1, 4096), *ptr2 = aligned_realloc(ptr, 0, 4096); ASSERT_TRUE(ptr && !ptr2); }
+
+TEST(aligned, contents_larger)
+{
+ unsigned char *ptr = (unsigned char*)aligned_malloc(50, 256);
+ ASSERT_TRUE(ptr);
+ for (int n = 0; n < 50; ++n)
+ ptr[n] = n;
+ unsigned char *ptr2 = (unsigned char*)aligned_realloc(ptr, 51, 256);
+ for (int n = 0; n < 50; ++n)
+ {
+ ASSERT_TRUE(ptr2[n] == n);
+ }
+ aligned_free(ptr2);
+}
+
+TEST(aligned, contents_same)
+{
+ unsigned char *ptr = (unsigned char*)aligned_malloc(50, 256);
+ ASSERT_TRUE(ptr);
+ for (int n = 0; n < 50; ++n)
+ ptr[n] = n;
+ unsigned char *ptr2 = (unsigned char*)aligned_realloc(ptr, 50, 256);
+ for (int n = 0; n < 50; ++n)
+ {
+ ASSERT_TRUE(ptr2[n] == n);
+ }
+ aligned_free(ptr2);
+}
+
+TEST(aligned, contents_smaller)
+{
+ unsigned char *ptr = (unsigned char*)aligned_malloc(50, 256);
+ ASSERT_TRUE(ptr);
+ for (int n = 0; n < 50; ++n)
+ ptr[n] = n;
+ unsigned char *ptr2 = (unsigned char*)aligned_realloc(ptr, 49, 256);
+ for (int n = 0; n < 49; ++n)
+ {
+ ASSERT_TRUE(ptr2[n] == n);
+ }
+ aligned_free(ptr2);
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 06:23:37 +0000