634fb9152c
Added support for more precise break points when debugging and stepping. To achieve that additional nop instructions are inserted where breaking would otherwise be impossible. The number of nop instructions inserted are sufficient to make place for patching with a call to a debug break code stub. On Intel that is 5 nop's for 32-bit and 13 for 64-bit. Om ARM 3 nop instructions (12 bytes) are required. In order to avoid inserting nop's in to many places a simple ast checker have been added to check whether there are breakable code in a statement or expression. If it is possible to break in an expression no additional break enabeling code is inserted. Added break locations to the true and false part of a conditional expression. Added stepping tests to cover more constructs. These changes are only in the full compiler. Changed the default value for the option --debugger in teh d8 shell from true to false. The reason for this is that with --debugger turned on the full compiler will be used for all code in when running d8, which can be unexpeceted. Review URL: http://codereview.chromium.org/2693002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4820 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
311 lines
12 KiB
C++
311 lines
12 KiB
C++
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_CHECKS_H_
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#define V8_CHECKS_H_
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#include <string.h>
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#include "flags.h"
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extern "C" void V8_Fatal(const char* file, int line, const char* format, ...);
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void API_Fatal(const char* location, const char* format, ...);
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// The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during
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// development, but they should not be relied on in the final product.
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#ifdef DEBUG
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#define FATAL(msg) \
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V8_Fatal(__FILE__, __LINE__, "%s", (msg))
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#define UNIMPLEMENTED() \
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V8_Fatal(__FILE__, __LINE__, "unimplemented code")
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#define UNREACHABLE() \
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V8_Fatal(__FILE__, __LINE__, "unreachable code")
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#else
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#define FATAL(msg) \
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V8_Fatal("", 0, "%s", (msg))
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#define UNIMPLEMENTED() \
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V8_Fatal("", 0, "unimplemented code")
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#define UNREACHABLE() ((void) 0)
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#endif
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// Used by the CHECK macro -- should not be called directly.
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static inline void CheckHelper(const char* file,
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int line,
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const char* source,
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bool condition) {
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if (!condition)
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V8_Fatal(file, line, "CHECK(%s) failed", source);
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}
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// The CHECK macro checks that the given condition is true; if not, it
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// prints a message to stderr and aborts.
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#define CHECK(condition) CheckHelper(__FILE__, __LINE__, #condition, condition)
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// Helper function used by the CHECK_EQ function when given int
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// arguments. Should not be called directly.
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static inline void CheckEqualsHelper(const char* file, int line,
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const char* expected_source, int expected,
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const char* value_source, int value) {
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if (expected != value) {
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V8_Fatal(file, line,
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"CHECK_EQ(%s, %s) failed\n# Expected: %i\n# Found: %i",
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expected_source, value_source, expected, value);
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}
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}
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// Helper function used by the CHECK_EQ function when given int64_t
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// arguments. Should not be called directly.
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static inline void CheckEqualsHelper(const char* file, int line,
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const char* expected_source,
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int64_t expected,
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const char* value_source,
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int64_t value) {
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if (expected != value) {
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// Print int64_t values in hex, as two int32s,
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// to avoid platform-dependencies.
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V8_Fatal(file, line,
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"CHECK_EQ(%s, %s) failed\n#"
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" Expected: 0x%08x%08x\n# Found: 0x%08x%08x",
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expected_source, value_source,
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static_cast<uint32_t>(expected >> 32),
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static_cast<uint32_t>(expected),
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static_cast<uint32_t>(value >> 32),
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static_cast<uint32_t>(value));
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}
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}
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// Helper function used by the CHECK_NE function when given int
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// arguments. Should not be called directly.
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static inline void CheckNonEqualsHelper(const char* file,
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int line,
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const char* unexpected_source,
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int unexpected,
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const char* value_source,
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int value) {
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if (unexpected == value) {
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V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %i",
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unexpected_source, value_source, value);
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}
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}
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// Helper function used by the CHECK function when given string
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// arguments. Should not be called directly.
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static inline void CheckEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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const char* expected,
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const char* value_source,
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const char* value) {
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if ((expected == NULL && value != NULL) ||
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(expected != NULL && value == NULL) ||
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(expected != NULL && value != NULL && strcmp(expected, value) != 0)) {
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V8_Fatal(file, line,
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"CHECK_EQ(%s, %s) failed\n# Expected: %s\n# Found: %s",
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expected_source, value_source, expected, value);
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}
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}
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static inline void CheckNonEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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const char* expected,
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const char* value_source,
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const char* value) {
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if (expected == value ||
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(expected != NULL && value != NULL && strcmp(expected, value) == 0)) {
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V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %s",
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expected_source, value_source, value);
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}
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}
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// Helper function used by the CHECK function when given pointer
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// arguments. Should not be called directly.
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static inline void CheckEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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void* expected,
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const char* value_source,
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void* value) {
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if (expected != value) {
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V8_Fatal(file, line,
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"CHECK_EQ(%s, %s) failed\n# Expected: %p\n# Found: %p",
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expected_source, value_source,
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expected, value);
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}
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}
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static inline void CheckNonEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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void* expected,
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const char* value_source,
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void* value) {
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if (expected == value) {
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V8_Fatal(file, line, "CHECK_NE(%s, %s) failed\n# Value: %p",
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expected_source, value_source, value);
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}
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}
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// Helper function used by the CHECK function when given floating
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// point arguments. Should not be called directly.
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static inline void CheckEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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double expected,
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const char* value_source,
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double value) {
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// Force values to 64 bit memory to truncate 80 bit precision on IA32.
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volatile double* exp = new double[1];
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*exp = expected;
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volatile double* val = new double[1];
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*val = value;
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if (*exp != *val) {
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V8_Fatal(file, line,
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"CHECK_EQ(%s, %s) failed\n# Expected: %f\n# Found: %f",
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expected_source, value_source, *exp, *val);
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}
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delete[] exp;
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delete[] val;
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}
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static inline void CheckNonEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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double expected,
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const char* value_source,
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double value) {
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// Force values to 64 bit memory to truncate 80 bit precision on IA32.
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volatile double* exp = new double[1];
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*exp = expected;
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volatile double* val = new double[1];
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*val = value;
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if (*exp == *val) {
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V8_Fatal(file, line,
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"CHECK_NE(%s, %s) failed\n# Value: %f",
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expected_source, value_source, *val);
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}
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delete[] exp;
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delete[] val;
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}
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namespace v8 {
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class Value;
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template <class T> class Handle;
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}
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void CheckNonEqualsHelper(const char* file,
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int line,
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const char* unexpected_source,
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v8::Handle<v8::Value> unexpected,
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const char* value_source,
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v8::Handle<v8::Value> value);
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void CheckEqualsHelper(const char* file,
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int line,
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const char* expected_source,
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v8::Handle<v8::Value> expected,
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const char* value_source,
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v8::Handle<v8::Value> value);
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#define CHECK_EQ(expected, value) CheckEqualsHelper(__FILE__, __LINE__, \
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#expected, expected, #value, value)
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#define CHECK_NE(unexpected, value) CheckNonEqualsHelper(__FILE__, __LINE__, \
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#unexpected, unexpected, #value, value)
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#define CHECK_GT(a, b) CHECK((a) > (b))
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#define CHECK_GE(a, b) CHECK((a) >= (b))
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// This is inspired by the static assertion facility in boost. This
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// is pretty magical. If it causes you trouble on a platform you may
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// find a fix in the boost code.
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template <bool> class StaticAssertion;
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template <> class StaticAssertion<true> { };
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// This macro joins two tokens. If one of the tokens is a macro the
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// helper call causes it to be resolved before joining.
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#define SEMI_STATIC_JOIN(a, b) SEMI_STATIC_JOIN_HELPER(a, b)
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#define SEMI_STATIC_JOIN_HELPER(a, b) a##b
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// Causes an error during compilation of the condition is not
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// statically known to be true. It is formulated as a typedef so that
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// it can be used wherever a typedef can be used. Beware that this
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// actually causes each use to introduce a new defined type with a
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// name depending on the source line.
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template <int> class StaticAssertionHelper { };
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#define STATIC_CHECK(test) \
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typedef \
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StaticAssertionHelper<sizeof(StaticAssertion<static_cast<bool>(test)>)> \
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SEMI_STATIC_JOIN(__StaticAssertTypedef__, __LINE__)
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// The ASSERT macro is equivalent to CHECK except that it only
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// generates code in debug builds. Ditto STATIC_ASSERT.
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#ifdef DEBUG
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#define ASSERT_RESULT(expr) CHECK(expr)
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#define ASSERT(condition) CHECK(condition)
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#define ASSERT_EQ(v1, v2) CHECK_EQ(v1, v2)
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#define ASSERT_NE(v1, v2) CHECK_NE(v1, v2)
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#define ASSERT_GE(v1, v2) CHECK_GE(v1, v2)
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#define STATIC_ASSERT(test) STATIC_CHECK(test)
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#define SLOW_ASSERT(condition) if (FLAG_enable_slow_asserts) CHECK(condition)
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#else
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#define ASSERT_RESULT(expr) (expr)
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#define ASSERT(condition) ((void) 0)
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#define ASSERT_EQ(v1, v2) ((void) 0)
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#define ASSERT_NE(v1, v2) ((void) 0)
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#define ASSERT_GE(v1, v2) ((void) 0)
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#define STATIC_ASSERT(test) ((void) 0)
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#define SLOW_ASSERT(condition) ((void) 0)
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#endif
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#define ASSERT_TAG_ALIGNED(address) \
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ASSERT((reinterpret_cast<intptr_t>(address) & kHeapObjectTagMask) == 0)
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#define ASSERT_SIZE_TAG_ALIGNED(size) ASSERT((size & kHeapObjectTagMask) == 0)
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#define ASSERT_NOT_NULL(p) ASSERT_NE(NULL, p)
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#endif // V8_CHECKS_H_
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