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Diffstat (limited to 'deps/v8/src/checks.h')
| -rw-r--r-- | deps/v8/src/checks.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/deps/v8/src/checks.h b/deps/v8/src/checks.h new file mode 100644 index 0000000000..0ff79afbca --- /dev/null +++ b/deps/v8/src/checks.h @@ -0,0 +1,263 @@ +// Copyright 2006-2008 the V8 project authors. All rights reserved. +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * 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. +// * Neither the name of Google Inc. 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 +// OWNER 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. + +#ifndef V8_CHECKS_H_ +#define V8_CHECKS_H_ + +#include <string.h> + +#include "flags.h" + +extern "C" void V8_Fatal(const char* file, int line, const char* format, ...); +void API_Fatal(const char* location, const char* format, ...); + +// The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during +// development, but they should not be relied on in the final product. +#ifdef DEBUG +#define FATAL(msg) \ + V8_Fatal(__FILE__, __LINE__, "%s", (msg)) +#define UNIMPLEMENTED() \ + V8_Fatal(__FILE__, __LINE__, "unimplemented code") +#define UNREACHABLE() \ + V8_Fatal(__FILE__, __LINE__, "unreachable code") +#else +#define FATAL(msg) \ + V8_Fatal("", 0, "%s", (msg)) +#define UNIMPLEMENTED() \ + V8_Fatal("", 0, "unimplemented code") +#define UNREACHABLE() ((void) 0) +#endif + + +// Used by the CHECK macro -- should not be called directly. +static inline void CheckHelper(const char* file, + int line, + const char* source, + bool condition) { + if (!condition) + V8_Fatal(file, line, "CHECK(%s) failed", source); +} + + +// The CHECK macro checks that the given condition is true; if not, it +// prints a message to stderr and aborts. +#define CHECK(condition) CheckHelper(__FILE__, __LINE__, #condition, condition) + + +// Helper function used by the CHECK_EQ function when given int +// arguments. Should not be called directly. +static inline void CheckEqualsHelper(const char* file, int line, + const char* expected_source, int expected, + const char* value_source, int value) { + if (expected != value) { + V8_Fatal(file, line, + "CHECK_EQ(%s, %s) failed\n# Expected: %i\n# Found: %i", + expected_source, value_source, expected, value); + } +} + + +// Helper function used by the CHECK_NE function when given int +// arguments. Should not be called directly. +static inline void CheckNonEqualsHelper(const char* file, + int line, + const char* unexpected_source, + int unexpected, + const char* value_source, + int value) { + if (unexpected == value) { + V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %i", + unexpected_source, value_source, value); + } +} + + +// Helper function used by the CHECK function when given string +// arguments. Should not be called directly. +static inline void CheckEqualsHelper(const char* file, + int line, + const char* expected_source, + const char* expected, + const char* value_source, + const char* value) { + if (strcmp(expected, value) != 0) { + V8_Fatal(file, line, + "CHECK_EQ(%s, %s) failed\n# Expected: %s\n# Found: %s", + expected_source, value_source, expected, value); + } +} + + +static inline void CheckNonEqualsHelper(const char* file, + int line, + const char* expected_source, + const char* expected, + const char* value_source, + const char* value) { + if (expected == value || + (expected != NULL && value != NULL && strcmp(expected, value) == 0)) { + V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %s", + expected_source, value_source, value); + } +} + + +// Helper function used by the CHECK function when given pointer +// arguments. Should not be called directly. +static inline void CheckEqualsHelper(const char* file, + int line, + const char* expected_source, + void* expected, + const char* value_source, + void* value) { + if (expected != value) { + V8_Fatal(file, line, + "CHECK_EQ(%s, %s) failed\n# Expected: %p\n# Found: %p", + expected_source, value_source, + expected, value); + } +} + + +static inline void CheckNonEqualsHelper(const char* file, + int line, + const char* expected_source, + void* expected, + const char* value_source, + void* value) { + if (expected == value) { + V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %p", + expected_source, value_source, value); + } +} + + +// Helper function used by the CHECK function when given floating +// point arguments. Should not be called directly. +static inline void CheckEqualsHelper(const char* file, + int line, + const char* expected_source, + double expected, + const char* value_source, + double value) { + // Force values to 64 bit memory to truncate 80 bit precision on IA32. + volatile double* exp = new double[1]; + *exp = expected; + volatile double* val = new double[1]; + *val = value; + if (*exp != *val) { + V8_Fatal(file, line, + "CHECK_EQ(%s, %s) failed\n# Expected: %f\n# Found: %f", + expected_source, value_source, *exp, *val); + } + delete[] exp; + delete[] val; +} + + +namespace v8 { + class Value; + template <class T> class Handle; +} + + +void CheckNonEqualsHelper(const char* file, + int line, + const char* unexpected_source, + v8::Handle<v8::Value> unexpected, + const char* value_source, + v8::Handle<v8::Value> value); + + +void CheckEqualsHelper(const char* file, + int line, + const char* expected_source, + v8::Handle<v8::Value> expected, + const char* value_source, + v8::Handle<v8::Value> value); + + +#define CHECK_EQ(expected, value) CheckEqualsHelper(__FILE__, __LINE__, \ + #expected, expected, #value, value) + + +#define CHECK_NE(unexpected, value) CheckNonEqualsHelper(__FILE__, __LINE__, \ + #unexpected, unexpected, #value, value) + + +#define CHECK_GT(a, b) CHECK((a) > (b)) +#define CHECK_GE(a, b) CHECK((a) >= (b)) + + +// This is inspired by the static assertion facility in boost. This +// is pretty magical. If it causes you trouble on a platform you may +// find a fix in the boost code. +template <bool> class StaticAssertion; +template <> class StaticAssertion<true> { }; +// This macro joins two tokens. If one of the tokens is a macro the +// helper call causes it to be resolved before joining. +#define SEMI_STATIC_JOIN(a, b) SEMI_STATIC_JOIN_HELPER(a, b) +#define SEMI_STATIC_JOIN_HELPER(a, b) a##b +// Causes an error during compilation of the condition is not +// statically known to be true. It is formulated as a typedef so that +// it can be used wherever a typedef can be used. Beware that this +// actually causes each use to introduce a new defined type with a +// name depending on the source line. +template <int> class StaticAssertionHelper { }; +#define STATIC_CHECK(test) \ + typedef \ + StaticAssertionHelper<sizeof(StaticAssertion<static_cast<bool>(test)>)> \ + SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__) + + +// The ASSERT macro is equivalent to CHECK except that it only +// generates code in debug builds. Ditto STATIC_ASSERT. +#ifdef DEBUG +#define ASSERT_RESULT(expr) CHECK(expr) +#define ASSERT(condition) CHECK(condition) +#define ASSERT_EQ(v1, v2) CHECK_EQ(v1, v2) +#define ASSERT_NE(v1, v2) CHECK_NE(v1, v2) +#define STATIC_ASSERT(test) STATIC_CHECK(test) +#define SLOW_ASSERT(condition) if (FLAG_enable_slow_asserts) CHECK(condition) +#else +#define ASSERT_RESULT(expr) (expr) +#define ASSERT(condition) ((void) 0) +#define ASSERT_EQ(v1, v2) ((void) 0) +#define ASSERT_NE(v1, v2) ((void) 0) +#define STATIC_ASSERT(test) ((void) 0) +#define SLOW_ASSERT(condition) ((void) 0) +#endif + + +#define ASSERT_TAG_ALIGNED(address) \ + ASSERT((reinterpret_cast<int>(address) & kHeapObjectTagMask) == 0) + +#define ASSERT_SIZE_TAG_ALIGNED(size) ASSERT((size & kHeapObjectTagMask) == 0) + +#define ASSERT_NOT_NULL(p) ASSERT_NE(NULL, p) + +#endif // V8_CHECKS_H_ |