| 1 | /* |
| 2 | * SPDX-License-Identifier: LGPL-2.1-only |
| 3 | * |
| 4 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef _UST_COMMON_MACROS_H |
| 8 | #define _UST_COMMON_MACROS_H |
| 9 | |
| 10 | #include <stdlib.h> |
| 11 | #include <stdbool.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | #include <lttng/ust-arch.h> |
| 15 | |
| 16 | /* |
| 17 | * calloc() does not always populate the page table for the allocated |
| 18 | * memory. Optionally enforce page table populate. |
| 19 | */ |
| 20 | static inline |
| 21 | void *zmalloc_populate(size_t len, bool populate) |
| 22 | __attribute__((always_inline)); |
| 23 | static inline |
| 24 | void *zmalloc_populate(size_t len, bool populate) |
| 25 | { |
| 26 | if (populate) { |
| 27 | void *ret = malloc(len); |
| 28 | if (ret == NULL) |
| 29 | return ret; |
| 30 | bzero(ret, len); |
| 31 | return ret; |
| 32 | } else { |
| 33 | return calloc(len, 1); |
| 34 | } |
| 35 | } |
| 36 | |
| 37 | /* |
| 38 | * Memory allocation zeroed |
| 39 | */ |
| 40 | static inline |
| 41 | void *zmalloc(size_t len) |
| 42 | __attribute__((always_inline)); |
| 43 | static inline |
| 44 | void *zmalloc(size_t len) |
| 45 | { |
| 46 | return zmalloc_populate(len, false); |
| 47 | } |
| 48 | |
| 49 | #define max_t(type, x, y) \ |
| 50 | ({ \ |
| 51 | type __max1 = (x); \ |
| 52 | type __max2 = (y); \ |
| 53 | __max1 > __max2 ? __max1: __max2; \ |
| 54 | }) |
| 55 | |
| 56 | #define min_t(type, x, y) \ |
| 57 | ({ \ |
| 58 | type __min1 = (x); \ |
| 59 | type __min2 = (y); \ |
| 60 | __min1 <= __min2 ? __min1: __min2; \ |
| 61 | }) |
| 62 | |
| 63 | #define LTTNG_ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0])) |
| 64 | |
| 65 | /* |
| 66 | * Use of __builtin_return_address(0) sometimes seems to cause stack |
| 67 | * corruption on 32-bit PowerPC. Disable this feature on that |
| 68 | * architecture for now by always using the NULL value for the ip |
| 69 | * context. |
| 70 | */ |
| 71 | #if defined(LTTNG_UST_ARCH_PPC) && !defined(LTTNG_UST_ARCH_PPC64) |
| 72 | #define LTTNG_UST_CALLER_IP() NULL |
| 73 | #else |
| 74 | #define LTTNG_UST_CALLER_IP() __builtin_return_address(0) |
| 75 | #endif |
| 76 | |
| 77 | #define lttng_ust_offsetofend(type, field) \ |
| 78 | (offsetof(type, field) + sizeof(((type *)NULL)->field)) |
| 79 | |
| 80 | #endif /* _UST_COMMON_MACROS_H */ |