diff options
Diffstat (limited to 'src/common')
| -rw-r--r-- | src/common/dwarf/cfi_assembler.h | 2 | ||||
| -rw-r--r-- | src/common/test_assembler.cc | 357 | ||||
| -rw-r--r-- | src/common/test_assembler.h | 472 | ||||
| -rw-r--r-- | src/common/test_assembler_unittest.cc | 1644 |
4 files changed, 2474 insertions, 1 deletions
diff --git a/src/common/dwarf/cfi_assembler.h b/src/common/dwarf/cfi_assembler.h index f5bf9710..7ec1a109 100644 --- a/src/common/dwarf/cfi_assembler.h +++ b/src/common/dwarf/cfi_assembler.h @@ -40,8 +40,8 @@ #include <string> #include "common/dwarf/dwarf2enums.h" +#include "common/test_assembler.h" #include "google_breakpad/common/breakpad_types.h" -#include "processor/test_assembler.h" namespace google_breakpad { diff --git a/src/common/test_assembler.cc b/src/common/test_assembler.cc new file mode 100644 index 00000000..3fd7cad0 --- /dev/null +++ b/src/common/test_assembler.cc @@ -0,0 +1,357 @@ +// Copyright (c) 2010, Google Inc. +// 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. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// test_assembler.cc: Implementation of google_breakpad::TestAssembler. +// See test_assembler.h for details. + +#include <cassert> +#include <cstdio> +#include <iterator> + +#include "common/test_assembler.h" + +namespace google_breakpad { +namespace TestAssembler { + +using std::back_insert_iterator; + +Label::Label() : value_(new Binding()) { } +Label::Label(u_int64_t value) : value_(new Binding(value)) { } +Label::Label(const Label &label) { + value_ = label.value_; + value_->Acquire(); +} +Label::~Label() { + if (value_->Release()) delete value_; +} + +Label &Label::operator=(u_int64_t value) { + value_->Set(NULL, value); + return *this; +} + +Label &Label::operator=(const Label &label) { + value_->Set(label.value_, 0); + return *this; +} + +Label Label::operator+(u_int64_t addend) const { + Label l; + l.value_->Set(this->value_, addend); + return l; +} + +Label Label::operator-(u_int64_t subtrahend) const { + Label l; + l.value_->Set(this->value_, -subtrahend); + return l; +} + +// When NDEBUG is #defined, assert doesn't evaluate its argument. This +// means you can't simply use assert to check the return value of a +// function with necessary side effects. +// +// ALWAYS_EVALUATE_AND_ASSERT(x) evaluates x regardless of whether +// NDEBUG is #defined; when NDEBUG is not #defined, it further asserts +// that x is true. +#ifdef NDEBUG +#define ALWAYS_EVALUATE_AND_ASSERT(x) x +#else +#define ALWAYS_EVALUATE_AND_ASSERT(x) assert(x) +#endif + +u_int64_t Label::operator-(const Label &label) const { + u_int64_t offset; + ALWAYS_EVALUATE_AND_ASSERT(IsKnownOffsetFrom(label, &offset)); + return offset; +} + +u_int64_t Label::Value() const { + u_int64_t v; + ALWAYS_EVALUATE_AND_ASSERT(IsKnownConstant(&v)); + return v; +}; + +bool Label::IsKnownConstant(u_int64_t *value_p) const { + Binding *base; + u_int64_t addend; + value_->Get(&base, &addend); + if (base != NULL) return false; + if (value_p) *value_p = addend; + return true; +} + +bool Label::IsKnownOffsetFrom(const Label &label, u_int64_t *offset_p) const +{ + Binding *label_base, *this_base; + u_int64_t label_addend, this_addend; + label.value_->Get(&label_base, &label_addend); + value_->Get(&this_base, &this_addend); + // If this and label are related, Get will find their final + // common ancestor, regardless of how indirect the relation is. This + // comparison also handles the constant vs. constant case. + if (this_base != label_base) return false; + if (offset_p) *offset_p = this_addend - label_addend; + return true; +} + +Label::Binding::Binding() : base_(this), addend_(), reference_count_(1) { } + +Label::Binding::Binding(u_int64_t addend) + : base_(NULL), addend_(addend), reference_count_(1) { } + +Label::Binding::~Binding() { + assert(reference_count_ == 0); + if (base_ && base_ != this && base_->Release()) + delete base_; +} + +void Label::Binding::Set(Binding *binding, u_int64_t addend) { + if (!base_ && !binding) { + // We're equating two constants. This could be okay. + assert(addend_ == addend); + } else if (!base_) { + // We are a known constant, but BINDING may not be, so turn the + // tables and try to set BINDING's value instead. + binding->Set(NULL, addend_ - addend); + } else { + if (binding) { + // Find binding's final value. Since the final value is always either + // completely unconstrained or a constant, never a reference to + // another variable (otherwise, it wouldn't be final), this + // guarantees we won't create cycles here, even for code like this: + // l = m, m = n, n = l; + u_int64_t binding_addend; + binding->Get(&binding, &binding_addend); + addend += binding_addend; + } + + // It seems likely that setting a binding to itself is a bug + // (although I can imagine this might turn out to be helpful to + // permit). + assert(binding != this); + + if (base_ != this) { + // Set the other bindings on our chain as well. Note that this + // is sufficient even though binding relationships form trees: + // All binding operations traverse their chains to the end, and + // all bindings related to us share some tail of our chain, so + // they will see the changes we make here. + base_->Set(binding, addend - addend_); + // We're not going to use base_ any more. + if (base_->Release()) delete base_; + } + + // Adopt BINDING as our base. Note that it should be correct to + // acquire here, after the release above, even though the usual + // reference-counting rules call for acquiring first, and then + // releasing: the self-reference assertion above should have + // complained if BINDING were 'this' or anywhere along our chain, + // so we didn't release BINDING. + if (binding) binding->Acquire(); + base_ = binding; + addend_ = addend; + } +} + +void Label::Binding::Get(Binding **base, u_int64_t *addend) { + if (base_ && base_ != this) { + // Recurse to find the end of our reference chain (the root of our + // tree), and then rewrite every binding along the chain to refer + // to it directly, adjusting addends appropriately. (This is why + // this member function isn't this-const.) + Binding *final_base; + u_int64_t final_addend; + base_->Get(&final_base, &final_addend); + if (final_base) final_base->Acquire(); + if (base_->Release()) delete base_; + base_ = final_base; + addend_ += final_addend; + } + *base = base_; + *addend = addend_; +} + +template<typename Inserter> +static inline void InsertEndian(TestAssembler::Endianness endianness, + size_t size, u_int64_t number, Inserter dest) { + if (endianness == kLittleEndian) { + for (size_t i = 0; i < size; i++) { + *dest++ = (char) (number & 0xff); + number >>= 8; + } + } else { + assert(endianness == kBigEndian); + // The loop condition is odd, but it's correct for size_t. + for (size_t i = size - 1; i < size; i--) + *dest++ = (char) ((number >> (i * 8)) & 0xff); + } +} + +Section &Section::Append(Endianness endianness, size_t size, u_int64_t number) { + InsertEndian(endianness, size, number, + back_insert_iterator<string>(contents_)); + return *this; +} + +Section &Section::Append(Endianness endianness, size_t size, + const Label &label) { + // If this label's value is known, there's no reason to waste an + // entry in references_ on it. + u_int64_t value; + if (label.IsKnownConstant(&value)) + return Append(endianness, size, value); + + // This will get caught when the references are resolved, but it's + // nicer to find out earlier. + assert(endianness != kUnsetEndian); + + references_.push_back(Reference(contents_.size(), endianness, size, label)); + contents_.append(size, 0); + return *this; +} + +#define ENDIANNESS_L kLittleEndian +#define ENDIANNESS_B kBigEndian +#define ENDIANNESS(e) ENDIANNESS_ ## e + +#define DEFINE_SHORT_APPEND_NUMBER_ENDIAN(e, bits) \ + Section &Section::e ## bits(u_int ## bits ## _t v) { \ + InsertEndian(ENDIANNESS(e), bits / 8, v, \ + back_insert_iterator<string>(contents_)); \ + return *this; \ + } + +#define DEFINE_SHORT_APPEND_LABEL_ENDIAN(e, bits) \ + Section &Section::e ## bits(const Label &v) { \ + return Append(ENDIANNESS(e), bits / 8, v); \ + } + +// Define L16, B32, and friends. +#define DEFINE_SHORT_APPEND_ENDIAN(e, bits) \ + DEFINE_SHORT_APPEND_NUMBER_ENDIAN(e, bits) \ + DEFINE_SHORT_APPEND_LABEL_ENDIAN(e, bits) + +DEFINE_SHORT_APPEND_LABEL_ENDIAN(L, 8); +DEFINE_SHORT_APPEND_LABEL_ENDIAN(B, 8); +DEFINE_SHORT_APPEND_ENDIAN(L, 16); +DEFINE_SHORT_APPEND_ENDIAN(L, 32); +DEFINE_SHORT_APPEND_ENDIAN(L, 64); +DEFINE_SHORT_APPEND_ENDIAN(B, 16); +DEFINE_SHORT_APPEND_ENDIAN(B, 32); +DEFINE_SHORT_APPEND_ENDIAN(B, 64); + +#define DEFINE_SHORT_APPEND_NUMBER_DEFAULT(bits) \ + Section &Section::D ## bits(u_int ## bits ## _t v) { \ + InsertEndian(endianness_, bits / 8, v, \ + back_insert_iterator<string>(contents_)); \ + return *this; \ + } +#define DEFINE_SHORT_APPEND_LABEL_DEFAULT(bits) \ + Section &Section::D ## bits(const Label &v) { \ + return Append(endianness_, bits / 8, v); \ + } +#define DEFINE_SHORT_APPEND_DEFAULT(bits) \ + DEFINE_SHORT_APPEND_NUMBER_DEFAULT(bits) \ + DEFINE_SHORT_APPEND_LABEL_DEFAULT(bits) + +DEFINE_SHORT_APPEND_LABEL_DEFAULT(8) +DEFINE_SHORT_APPEND_DEFAULT(16); +DEFINE_SHORT_APPEND_DEFAULT(32); +DEFINE_SHORT_APPEND_DEFAULT(64); + +Section &Section::Append(const Section §ion) { + size_t base = contents_.size(); + contents_.append(section.contents_); + for (vector<Reference>::const_iterator it = section.references_.begin(); + it != section.references_.end(); it++) + references_.push_back(Reference(base + it->offset, it->endianness, + it->size, it->label)); + return *this; +} + +Section &Section::LEB128(long long value) { + while (value < -0x40 || 0x3f < value) { + contents_ += (value & 0x7f) | 0x80; + if (value < 0) + value = (value >> 7) | ~(((unsigned long long) -1) >> 7); + else + value = (value >> 7); + } + contents_ += value & 0x7f; + return *this; +} + +Section &Section::ULEB128(u_int64_t value) { + while (value > 0x7f) { + contents_ += (value & 0x7f) | 0x80; + value = (value >> 7); + } + contents_ += value; + return *this; +} + +Section &Section::Align(size_t alignment, u_int8_t pad_byte) { + // ALIGNMENT must be a power of two. + assert(((alignment - 1) & alignment) == 0); + size_t new_size = (contents_.size() + alignment - 1) & ~(alignment - 1); + contents_.append(new_size - contents_.size(), pad_byte); + assert((contents_.size() & (alignment - 1)) == 0); + return *this; +} + +void Section::Clear() { + contents_.clear(); + references_.clear(); +} + +bool Section::GetContents(string *contents) { + // For each label reference, find the label's value, and patch it into + // the section's contents. + for (size_t i = 0; i < references_.size(); i++) { + Reference &r = references_[i]; + u_int64_t value; + if (!r.label.IsKnownConstant(&value)) { + fprintf(stderr, "Undefined label #%d at offset 0x%x\n", i, r.offset); + return false; + } + assert(r.offset < contents_.size()); + assert(contents_.size() - r.offset >= r.size); + InsertEndian(r.endianness, r.size, value, contents_.begin() + r.offset); + } + contents->clear(); + std::swap(contents_, *contents); + references_.clear(); + return true; +} + +} // namespace TestAssembler +} // namespace google_breakpad diff --git a/src/common/test_assembler.h b/src/common/test_assembler.h new file mode 100644 index 00000000..560f7aef --- /dev/null +++ b/src/common/test_assembler.h @@ -0,0 +1,472 @@ +// -*- mode: C++ -*- + +// Copyright (c) 2010, Google Inc. +// 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. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// test-assembler.h: interface to class for building complex binary streams. + +// To test the Breakpad symbol dumper and processor thoroughly, for +// all combinations of host system and minidump processor +// architecture, we need to be able to easily generate complex test +// data like debugging information and minidump files. +// +// For example, if we want our unit tests to provide full code +// coverage for stack walking, it may be difficult to persuade the +// compiler to generate every possible sort of stack walking +// information that we want to support; there are probably DWARF CFI +// opcodes that GCC never emits. Similarly, if we want to test our +// error handling, we will need to generate damaged minidumps or +// debugging information that (we hope) the client or compiler will +// never produce on its own. +// +// google_breakpad::TestAssembler provides a predictable and +// (relatively) simple way to generate complex formatted data streams +// like minidumps and CFI. Furthermore, because TestAssembler is +// portable, developers without access to (say) Visual Studio or a +// SPARC assembler can still work on test data for those targets. + +#ifndef PROCESSOR_TEST_ASSEMBLER_H_ +#define PROCESSOR_TEST_ASSEMBLER_H_ + +#include <list> +#include <vector> +#include <string> + +#include "google_breakpad/common/breakpad_types.h" + +namespace google_breakpad { + +using std::list; +using std::string; +using std::vector; + +namespace TestAssembler { + +// A Label represents a value not yet known that we need to store in a +// section. As long as all the labels a section refers to are defined +// by the time we retrieve its contents as bytes, we can use undefined +// labels freely in that section's construction. +// +// A label can be in one of three states: +// - undefined, +// - defined as the sum of some other label and a constant, or +// - a constant. +// +// A label's value never changes, but it can accumulate constraints. +// Adding labels and integers is permitted, and yields a label. +// Subtracting a constant from a label is permitted, and also yields a +// label. Subtracting two labels that have some relationship to each +// other is permitted, and yields a constant. +// +// For example: +// +// Label a; // a's value is undefined +// Label b; // b's value is undefined +// { +// Label c = a + 4; // okay, even though a's value is unknown +// b = c + 4; // also okay; b is now a+8 +// } +// Label d = b - 2; // okay; d == a+6, even though c is gone +// d.Value(); // error: d's value is not yet known +// d - a; // is 6, even though their values are not known +// a = 12; // now b == 20, and d == 18 +// d.Value(); // 18: no longer an error +// b.Value(); // 20 +// d = 10; // error: d is already defined. +// +// Label objects' lifetimes are unconstrained: notice that, in the +// above example, even though a and b are only related through c, and +// c goes out of scope, the assignment to a sets b's value as well. In +// particular, it's not necessary to ensure that a Label lives beyond +// Sections that refer to it. +class Label { + public: + Label(); // An undefined label. + Label(u_int64_t value); // A label with a fixed value + Label(const Label &value); // A label equal to another. + ~Label(); + + // Return this label's value; it must be known. + // + // Providing this as a cast operator is nifty, but the conversions + // happen in unexpected places. In particular, ISO C++ says that + // Label + size_t becomes ambigious, because it can't decide whether + // to convert the Label to a u_int64_t and then to a size_t, or use + // the overloaded operator that returns a new label, even though the + // former could fail if the label is not yet defined and the latter won't. + u_int64_t Value() const; + + Label &operator=(u_int64_t value); + Label &operator=(const Label &value); + Label operator+(u_int64_t addend) const; + Label operator-(u_int64_t subtrahend) const; + u_int64_t operator-(const Label &subtrahend) const; + + // We could also provide == and != that work on undefined, but + // related, labels. + + // Return true if this label's value is known. If VALUE_P is given, + // set *VALUE_P to the known value if returning true. + bool IsKnownConstant(u_int64_t *value_p = NULL) const; + + // Return true if the offset from LABEL to this label is known. If + // OFFSET_P is given, set *OFFSET_P to the offset when returning true. + // + // You can think of l.KnownOffsetFrom(m, &d) as being like 'd = l-m', + // except that it also returns a value indicating whether the + // subtraction is possible given what we currently know of l and m. + // It can be possible even if we don't know l and m's values. For + // example: + // + // Label l, m; + // m = l + 10; + // l.IsKnownConstant(); // false + // m.IsKnownConstant(); // false + // u_int64_t d; + // l.IsKnownOffsetFrom(m, &d); // true, and sets d to -10. + // l-m // -10 + // m-l // 10 + // m.Value() // error: m's value is not known + bool IsKnownOffsetFrom(const Label &label, u_int64_t *offset_p = NULL) const; + + private: + // A label's value, or if that is not yet known, how the value is + // related to other labels' values. A binding may be: + // - a known constant, + // - constrained to be equal to some other binding plus a constant, or + // - unconstrained, and free to take on any value. + // + // Many labels may point to a single binding, and each binding may + // refer to another, so bindings and labels form trees whose leaves + // are labels, whose interior nodes (and roots) are bindings, and + // where links point from children to parents. Bindings are + // reference counted, allowing labels to be lightweight, copyable, + // assignable, placed in containers, and so on. + class Binding { + public: + Binding(); + Binding(u_int64_t addend); + ~Binding(); + + // Increment our reference count. + void Acquire() { reference_count_++; }; + // Decrement our reference count, and return true if it is zero. + bool Release() { return --reference_count_ == 0; } + + // Set this binding to be equal to BINDING + ADDEND. If BINDING is + // NULL, then set this binding to the known constant ADDEND. + // Update every binding on this binding's chain to point directly + // to BINDING, or to be a constant, with addends adjusted + // appropriately. + void Set(Binding *binding, u_int64_t value); + + // Return what we know about the value of this binding. + // - If this binding's value is a known constant, set BASE to + // NULL, and set ADDEND to its value. + // - If this binding is not a known constant but related to other + // bindings, set BASE to the binding at the end of the relation + // chain (which will always be unconstrained), and set ADDEND to the + // value to add to that binding's value to get this binding's + // value. + // - If this binding is unconstrained, set BASE to this, and leave + // ADDEND unchanged. + void Get(Binding **base, u_int64_t *addend); + + private: + // There are three cases: + // + // - A binding representing a known constant value has base_ NULL, + // and addend_ equal to the value. + // + // - A binding representing a completely unconstrained value has + // base_ pointing to this; addend_ is unused. + // + // - A binding whose value is related to some other binding's + // value has base_ pointing to that other binding, and addend_ + // set to the amount to add to that binding's value to get this + // binding's value. We only represent relationships of the form + // x = y+c. + // + // Thus, the bind_ links form a chain terminating in either a + // known constant value or a completely unconstrained value. Most + // operations on bindings do path compression: they change every + // binding on the chain to point directly to the final value, + // adjusting addends as appropriate. + Binding *base_; + u_int64_t addend_; + + // The number of Labels and Bindings pointing to this binding. + // (When a binding points to itself, indicating a completely + // unconstrained binding, that doesn't count as a reference.) + int reference_count_; + }; + + // This label's value. + Binding *value_; +}; + +inline Label operator+(u_int64_t a, const Label &l) { return l + a; } +// Note that int-Label isn't defined, as negating a Label is not an +// operation we support. + +// Conventions for representing larger numbers as sequences of bytes. +enum Endianness { + kBigEndian, // Big-endian: the most significant byte comes first. + kLittleEndian, // Little-endian: the least significant byte comes first. + kUnsetEndian, // used internally +}; + +// A section is a sequence of bytes, constructed by appending bytes +// to the end. Sections have a convenient and flexible set of member +// functions for appending data in various formats: big-endian and +// little-endian signed and unsigned values of different sizes; +// LEB128 and ULEB128 values (see below), and raw blocks of bytes. +// +// If you need to append a value to a section that is not convenient +// to compute immediately, you can create a label, append the +// label's value to the section, and then set the label's value +// later, when it's convenient to do so. Once a label's value is +// known, the section class takes care of updating all previously +// appended references to it. +// +// Once all the labels to which a section refers have had their +// values determined, you can get a copy of the section's contents +// as a string. +// +// Note that there is no specified "start of section" label. This is +// because there are typically several different meanings for "the +// start of a section": the offset of the section within an object +// file, the address in memory at which the section's content appear, +// and so on. It's up to the code that uses the Section class to +// keep track of these explicitly, as they depend on the application. +class Section { + public: + Section(Endianness endianness = kUnsetEndian) + : endianness_(endianness) { }; + ~Section() { }; + + // Set the default endianness of this section to ENDIANNESS. This + // sets the behavior of the D<N> appending functions. If the + // assembler's default endianness was set, this is the + void set_endianness(Endianness endianness) { + endianness_ = endianness; + } + + // Return the default endianness of this section. + Endianness endianness() const { return endianness_; } + + // Append the SIZE bytes at DATA or the contents of STRING to the + // end of this section. Return a reference to this section. + Section &Append(const u_int8_t *data, size_t size) { + contents_.append(reinterpret_cast<const char *>(data), size); + return *this; + }; + Section &Append(const string &data) { + contents_.append(data); + return *this; + }; + + // Append SIZE copies of BYTE to the end of this section. Return a + // reference to this section. + Section &Append(size_t size, u_int8_t byte) { + contents_.append(size, (char) byte); + return *this; + } + + // Append NUMBER to this section. ENDIANNESS is the endianness to + // use to write the number. SIZE is the length of the number in + // bytes. Return a reference to this section. + Section &Append(Endianness endianness, size_t size, u_int64_t number); + Section &Append(Endianness endianness, size_t size, const Label &label); + + // Append SECTION to the end of this section. The labels SECTION + // refers to need not be defined yet. + // + // Note that this has no effect on any Labels' values, or on + // SECTION. If placing SECTION within 'this' provides new + // constraints on existing labels' values, then it's up to the + // caller to fiddle with those labels as needed. + Section &Append(const Section §ion); + + // Append the contents of DATA as a series of bytes terminated by + // a NULL character. + Section &AppendCString(const string &data) { + Append(data); + contents_ += '\0'; + return *this; + } + + // Append VALUE or LABEL to this section, with the given bit width and + // endianness. Return a reference to this section. + // + // The names of these functions have the form <ENDIANNESS><BITWIDTH>: + // <ENDIANNESS> is either 'L' (little-endian, least significant byte first), + // 'B' (big-endian, most significant byte first), or + // 'D' (default, the section's default endianness) + // <BITWIDTH> is 8, 16, 32, or 64. + // + // Since endianness doesn't matter for a single byte, all the + // <BITWIDTH>=8 functions are equivalent. + // + // These can be used to write both signed and unsigned values, as + // the compiler will properly sign-extend a signed value before + // passing it to the function, at which point the function's + // behavior is the same either way. + Section &L8(u_int8_t value) { contents_ += value; return *this; } + Section &B8(u_int8_t value) { contents_ += value; return *this; } + Section &D8(u_int8_t value) { contents_ += value; return *this; } + Section &L16(u_int16_t), &L32(u_int32_t), &L64(u_int64_t), + &B16(u_int16_t), &B32(u_int32_t), &B64(u_int64_t), + &D16(u_int16_t), &D32(u_int32_t), &D64(u_int64_t); + Section &L8(const Label &label), &L16(const Label &label), + &L32(const Label &label), &L64(const Label &label), + &B8(const Label &label), &B16(const Label &label), + &B32(const Label &label), &B64(const Label &label), + &D8(const Label &label), &D16(const Label &label), + &D32(const Label &label), &D64(const Label &label); + + // Append VALUE in a signed LEB128 (Little-Endian Base 128) form. + // + // The signed LEB128 representation of an integer N is a variable + // number of bytes: + // + // - If N is between -0x40 and 0x3f, then its signed LEB128 + // representation is a single byte whose value is N. + // + // - Otherwise, its signed LEB128 representation is (N & 0x7f) | + // 0x80, followed by the signed LEB128 representation of N / 128, + // rounded towards negative infinity. + // + // In other words, we break VALUE into groups of seven bits, put + // them in little-endian order, and then write them as eight-bit + // bytes with the high bit on all but the last. + // + // Note that VALUE cannot be a Label (we would have to implement + // relaxation). + Section &LEB128(long long value); + + // Append VALUE in unsigned LEB128 (Little-Endian Base 128) form. + // + // The unsigned LEB128 representation of an integer N is a variable + // number of bytes: + // + // - If N is between 0 and 0x7f, then its unsigned LEB128 + // representation is a single byte whose value is N. + // + // - Otherwise, its unsigned LEB128 representation is (N & 0x7f) | + // 0x80, followed by the unsigned LEB128 representation of N / + // 128, rounded towards negative infinity. + // + // Note that VALUE cannot be a Label (we would have to implement + // relaxation). + Section &ULEB128(u_int64_t value); + + // Jump to the next location aligned on an ALIGNMENT-byte boundary, + // relative to the start of the section. Fill the gap with PAD_BYTE. + // ALIGNMENT must be a power of two. Return a reference to this + // section. + Section &Align(size_t alignment, u_int8_t pad_byte = 0); + + // Clear the contents of this section. + void Clear(); + + // Return the current size of the section. + size_t Size() const { return contents_.size(); } + + // Return a label representing the start of the section. + // + // It is up to the user whether this label represents the section's + // position in an object file, the section's address in memory, or + // what have you; some applications may need both, in which case + // this simple-minded interface won't be enough. This class only + // provides a single start label, for use with the Here and Mark + // member functions. + // + // Ideally, we'd provide this in a subclass that actually knows more + // about the application at hand and can provide an appropriate + // collection of start labels. But then the appending member + // functions like Append and D32 would return a reference to the + // base class, not the derived class, and the chaining won't work. + // Since the only value here is in pretty notation, that's a fatal + // flaw. + Label start() const { return start_; } + + // Return a label representing the point at which the next Appended + // item will appear in the section, relative to start(). + Label Here() const { return start_ + Size(); } + + // Set *LABEL to Here, and return a reference to this section. + Section &Mark(Label *label) { *label = Here(); return *this; } + + // If there are no undefined label references left in this + // section, set CONTENTS to the contents of this section, as a + // string, and clear this section. Return true on success, or false + // if there were still undefined labels. + bool GetContents(string *contents); + + private: + // Used internally. A reference to a label's value. + struct Reference { + Reference(size_t set_offset, Endianness set_endianness, size_t set_size, + const Label &set_label) + : offset(set_offset), endianness(set_endianness), size(set_size), + label(set_label) { } + + // The offset of the reference within the section. + size_t offset; + + // The endianness of the reference. + Endianness endianness; + + // The size of the reference. + size_t size; + + // The label to which this is a reference. + Label label; + }; + + // The default endianness of this section. + Endianness endianness_; + + // The contents of the section. + string contents_; + + // References to labels within those contents. + vector<Reference> references_; + + // A label referring to the beginning of the section. + Label start_; +}; + +} // namespace TestAssembler +} // namespace google_breakpad + +#endif // PROCESSOR_TEST_ASSEMBLER_H_ diff --git a/src/common/test_assembler_unittest.cc b/src/common/test_assembler_unittest.cc new file mode 100644 index 00000000..9b6990ce --- /dev/null +++ b/src/common/test_assembler_unittest.cc @@ -0,0 +1,1644 @@ +// Copyright (c) 2010, Google Inc. +// 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. + +// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> + +// test_assembler_unittest.cc: Unit tests for google_breakpad::TestAssembler. + +#include <string> +#include <string.h> + +#include "breakpad_googletest_includes.h" +#include "common/test_assembler.h" + +using google_breakpad::TestAssembler::Label; +using google_breakpad::TestAssembler::Section; +using google_breakpad::TestAssembler::kBigEndian; +using google_breakpad::TestAssembler::kLittleEndian; +using std::string; +using testing::Test; + +TEST(ConstructLabel, Simple) { + Label l; +} + +TEST(ConstructLabel, Undefined) { + Label l; + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(ConstructLabelDeathTest, Undefined) { + Label l; + ASSERT_DEATH(l.Value(), "IsKnownConstant\\(&v\\)"); +} + +TEST(ConstructLabel, Constant) { + Label l(0x060b9f974eaf301eULL); + u_int64_t v; + EXPECT_TRUE(l.IsKnownConstant(&v)); + EXPECT_EQ(v, 0x060b9f974eaf301eULL); + EXPECT_EQ(l.Value(), 0x060b9f974eaf301eULL); +} + +TEST(ConstructLabel, Copy) { + Label l; + Label m(l); + u_int64_t v; + EXPECT_TRUE(l.IsKnownOffsetFrom(m, &v)); + EXPECT_EQ(0U, v); +} + +// The left-hand-side of a label assignment can be either +// unconstrained, related, or known. The right-hand-side can be any of +// those, or an integer. +TEST(Assignment, UnconstrainedToUnconstrained) { + Label l, m; + l = m; + EXPECT_EQ(0U, l-m); + EXPECT_TRUE(l.IsKnownOffsetFrom(m)); + u_int64_t d; + EXPECT_TRUE(l.IsKnownOffsetFrom(m, &d)); + EXPECT_EQ(0U, d); + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(Assignment, UnconstrainedToRelated) { + Label l, m, n; + l = n; + l = m; + EXPECT_EQ(0U, l-m); + EXPECT_TRUE(l.IsKnownOffsetFrom(m)); + u_int64_t d; + EXPECT_TRUE(l.IsKnownOffsetFrom(m, &d)); + EXPECT_EQ(0U, d); + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(Assignment, UnconstrainedToKnown) { + Label l, m; + l = 0x8fd16e55b20a39c1ULL; + l = m; + EXPECT_EQ(0U, l-m); + EXPECT_TRUE(l.IsKnownOffsetFrom(m)); + u_int64_t d; + EXPECT_TRUE(l.IsKnownOffsetFrom(m, &d)); + EXPECT_EQ(0U, d); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x8fd16e55b20a39c1ULL, m.Value()); +} + +TEST(Assignment, RelatedToUnconstrained) { + Label l, m, n; + m = n; + l = m; + EXPECT_EQ(0U, l-n); + EXPECT_TRUE(l.IsKnownOffsetFrom(n)); + u_int64_t d; + EXPECT_TRUE(l.IsKnownOffsetFrom(n, &d)); + EXPECT_EQ(0U, d); + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(Assignment, RelatedToRelated) { + Label l, m, n, o; + l = n; + m = o; + l = m; + EXPECT_EQ(0U, n-o); + EXPECT_TRUE(n.IsKnownOffsetFrom(o)); + u_int64_t d; + EXPECT_TRUE(n.IsKnownOffsetFrom(o, &d)); + EXPECT_EQ(0U, d); + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(Assignment, RelatedToKnown) { + Label l, m, n; + m = n; + l = 0xd2011f8c82ad56f2ULL; + l = m; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0xd2011f8c82ad56f2ULL, l.Value()); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0xd2011f8c82ad56f2ULL, m.Value()); + EXPECT_TRUE(n.IsKnownConstant()); + EXPECT_EQ(0xd2011f8c82ad56f2ULL, n.Value()); +} + +TEST(Assignment, KnownToUnconstrained) { + Label l, m; + m = 0x50b024c0d6073887ULL; + l = m; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0x50b024c0d6073887ULL, l.Value()); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x50b024c0d6073887ULL, m.Value()); +} + +TEST(Assignment, KnownToRelated) { + Label l, m, n; + l = n; + m = 0x5348883655c727e5ULL; + l = m; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0x5348883655c727e5ULL, l.Value()); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x5348883655c727e5ULL, m.Value()); + EXPECT_TRUE(n.IsKnownConstant()); + EXPECT_EQ(0x5348883655c727e5ULL, n.Value()); +} + +TEST(Assignment, KnownToKnown) { + Label l, m; + l = 0x36c209c20987564eULL; + m = 0x36c209c20987564eULL; + l = m; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0x36c209c20987564eULL, l.Value()); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x36c209c20987564eULL, m.Value()); +} + +TEST(Assignment, ConstantToUnconstrained) { + Label l; + l = 0xc02495f4d7f5a957ULL; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0xc02495f4d7f5a957ULL, l.Value()); +} + +TEST(Assignment, ConstantToRelated) { + Label l, m; + l = m; + l = 0x4577901cf275488dULL; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0x4577901cf275488dULL, l.Value()); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x4577901cf275488dULL, m.Value()); +} + +TEST(Assignment, ConstantToKnown) { + Label l; + l = 0xec0b9c369b7e8ea7ULL; + l = 0xec0b9c369b7e8ea7ULL; + EXPECT_TRUE(l.IsKnownConstant()); + EXPECT_EQ(0xec0b9c369b7e8ea7ULL, l.Value()); +} + +TEST(AssignmentDeathTest, Self) { + Label l; + ASSERT_DEATH(l = l, "binding != this"); +} + +TEST(AssignmentDeathTest, IndirectCycle) { + Label l, m, n; + l = m; + m = n; + ASSERT_DEATH(n = l, "binding != this"); +} + +TEST(AssignmentDeathTest, Cycle) { + Label l, m, n, o; + l = m; + m = n; + o = n; + ASSERT_DEATH(o = l, "binding != this"); +} + +TEST(Addition, LabelConstant) { + Label l, m; + m = l + 0x5248d93e8bbe9497ULL; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(0x5248d93e8bbe9497ULL, d); + EXPECT_FALSE(m.IsKnownConstant()); +} + +TEST(Addition, ConstantLabel) { + Label l, m; + m = 0xf51e94e00d6e3c84ULL + l; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(0xf51e94e00d6e3c84ULL, d); + EXPECT_FALSE(m.IsKnownConstant()); +} + +TEST(Addition, KnownLabelConstant) { + Label l, m; + l = 0x16286307042ce0d8ULL; + m = l + 0x3fdddd91306719d7ULL; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(0x3fdddd91306719d7ULL, d); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x16286307042ce0d8ULL + 0x3fdddd91306719d7ULL, m.Value()); +} + +TEST(Addition, ConstantKnownLabel) { + Label l, m; + l = 0x50f62d0cdd1031deULL; + m = 0x1b13462d8577c538ULL + l; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(0x1b13462d8577c538ULL, d); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x50f62d0cdd1031deULL + 0x1b13462d8577c538ULL, m.Value()); +} + +TEST(Subtraction, LabelConstant) { + Label l, m; + m = l - 0x0620884d21d3138eULL; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(-0x0620884d21d3138eULL, d); + EXPECT_FALSE(m.IsKnownConstant()); +} + +TEST(Subtraction, KnownLabelConstant) { + Label l, m; + l = 0x6237fbaf9ef7929eULL; + m = l - 0x317730995d2ab6eeULL; + EXPECT_TRUE(m.IsKnownOffsetFrom(l)); + u_int64_t d; + EXPECT_TRUE(m.IsKnownOffsetFrom(l, &d)); + EXPECT_EQ(-0x317730995d2ab6eeULL, d); + EXPECT_TRUE(m.IsKnownConstant()); + EXPECT_EQ(0x6237fbaf9ef7929eULL - 0x317730995d2ab6eeULL, m.Value()); +} + +TEST(SubtractionDeathTest, LabelLabel) { + Label l, m; + ASSERT_DEATH(l - m, "IsKnownOffsetFrom\\(label, &offset\\)"); +} + +TEST(Subtraction, LabelLabel) { + Label l, m; + l = m + 0x7fa77ec63e28a17aULL; + EXPECT_EQ(0x7fa77ec63e28a17aULL, l - m); + EXPECT_EQ(-0x7fa77ec63e28a17aULL, m - l); +} + +TEST(IsKnownConstant, Undefined) { + Label l; + EXPECT_FALSE(l.IsKnownConstant()); +} + +TEST(IsKnownConstant, RelatedLabel) { + Label l, m; + l = m; + EXPECT_FALSE(l.IsKnownConstant()); + EXPECT_FALSE(m.IsKnownConstant()); +} + +TEST(IsKnownConstant, Constant) { + Label l; + l = 0xf374b1bdd6a22576ULL; + EXPECT_TRUE(l.IsKnownConstant()); +} + +TEST(IsKnownOffsetFrom, Unrelated) { + Label l, m; + EXPECT_FALSE(l.IsKnownOffsetFrom(m)); +} + +TEST(IsKnownOffsetFrom, Related) { + Label l, m; + l = m; + EXPECT_TRUE(l.IsKnownOffsetFrom(m)); +} + +// Test the construction of chains of related labels, and the +// propagation of values through them. +// +// Although the relations between labels are supposed to behave +// symmetrically --- that is, 'a = b' should put a and b in +// indistinguishable states --- there's a distinction made internally +// between the target (a) and the source (b). +// +// So there are five test axes to cover: +// +// - Do we construct the chain with assignment ("Assign") or with constructors +// ("Construct")? +// +// - Do we set the value of the label at the start of the chain +// ("Start") or the label at the end ("End")? +// +// - Are we testing the propagation of a relationship between variable +// values ("Relation"), or the propagation of a known constant value +// ("Value")? +// +// - Do we set the value before building the chain ("Before") or after +// the chain has been built ("After")? +// +// - Do we add new relationships to the end of the existing chain +// ("Forward") or to the beginning ("Backward")? +// +// Of course, "Construct" and "Backward" can't be combined, which +// eliminates eight combinations, and "Construct", "End", and "Before" +// can't be combined, which eliminates two more, so there are are 22 +// combinations, not 32. + +TEST(LabelChain, AssignStartRelationBeforeForward) { + Label a, b, c, d; + Label x; + a = x; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, AssignStartRelationBeforeBackward) { + Label a, b, c, d; + Label x; + a = x; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, AssignStartRelationAfterForward) { + Label a, b, c, d; + Label x; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + a = x; + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, AssignStartRelationAfterBackward) { + Label a, b, c, d; + Label x; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + a = x; + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, AssignStartValueBeforeForward) { + Label a, b, c, d; + a = 0xa131200190546ac2ULL; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + EXPECT_EQ(0xa131200190546ac2ULL + 0x111U, d.Value()); + EXPECT_EQ(0xa131200190546ac2ULL + 0x11U, c.Value()); + EXPECT_EQ(0xa131200190546ac2ULL + 0x1U, b.Value()); + EXPECT_EQ(0xa131200190546ac2ULL + 0U, a.Value()); +} + +TEST(LabelChain, AssignStartValueBeforeBackward) { + Label a, b, c, d; + a = 0x8da17e1670ad4fa2ULL; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + EXPECT_EQ(0x8da17e1670ad4fa2ULL + 0x111U, d.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL + 0x11U, c.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL + 0x1U, b.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL + 0U, a.Value()); +} + +TEST(LabelChain, AssignStartValueAfterForward) { + Label a, b, c, d; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + a = 0x99b8f51bafd41adaULL; + EXPECT_EQ(0x99b8f51bafd41adaULL + 0x111U, d.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL + 0x11U, c.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL + 0x1U, b.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL + 0U, a.Value()); +} + +TEST(LabelChain, AssignStartValueAfterBackward) { + Label a, b, c, d; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + a = 0xc86ca1d97ab5df6eULL; + EXPECT_EQ(0xc86ca1d97ab5df6eULL + 0x111U, d.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL + 0x11U, c.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL + 0x1U, b.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL + 0U, a.Value()); +} + +TEST(LabelChain, AssignEndRelationBeforeForward) { + Label a, b, c, d; + Label x; + x = d; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + EXPECT_EQ(-(u_int64_t)0x111U, a-x); + EXPECT_EQ(-(u_int64_t)0x110U, b-x); + EXPECT_EQ(-(u_int64_t)0x100U, c-x); + EXPECT_EQ(-(u_int64_t)0U, d-x); +} + +TEST(LabelChain, AssignEndRelationBeforeBackward) { + Label a, b, c, d; + Label x; + x = d; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + EXPECT_EQ(-(u_int64_t)0x111U, a-x); + EXPECT_EQ(-(u_int64_t)0x110U, b-x); + EXPECT_EQ(-(u_int64_t)0x100U, c-x); + EXPECT_EQ(-(u_int64_t)0U, d-x); +} + +TEST(LabelChain, AssignEndRelationAfterForward) { + Label a, b, c, d; + Label x; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + x = d; + EXPECT_EQ(-(u_int64_t)0x111U, a-x); + EXPECT_EQ(-(u_int64_t)0x110U, b-x); + EXPECT_EQ(-(u_int64_t)0x100U, c-x); + EXPECT_EQ(-(u_int64_t)0x000U, d-x); +} + +TEST(LabelChain, AssignEndRelationAfterBackward) { + Label a, b, c, d; + Label x; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + x = d; + EXPECT_EQ(-(u_int64_t)0x111U, a-x); + EXPECT_EQ(-(u_int64_t)0x110U, b-x); + EXPECT_EQ(-(u_int64_t)0x100U, c-x); + EXPECT_EQ(-(u_int64_t)0x000U, d-x); +} + +TEST(LabelChain, AssignEndValueBeforeForward) { + Label a, b, c, d; + d = 0xa131200190546ac2ULL; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + EXPECT_EQ(0xa131200190546ac2ULL - 0x111, a.Value()); + EXPECT_EQ(0xa131200190546ac2ULL - 0x110, b.Value()); + EXPECT_EQ(0xa131200190546ac2ULL - 0x100, c.Value()); + EXPECT_EQ(0xa131200190546ac2ULL - 0x000, d.Value()); +} + +TEST(LabelChain, AssignEndValueBeforeBackward) { + Label a, b, c, d; + d = 0x8da17e1670ad4fa2ULL; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + EXPECT_EQ(0x8da17e1670ad4fa2ULL - 0x111, a.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL - 0x110, b.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL - 0x100, c.Value()); + EXPECT_EQ(0x8da17e1670ad4fa2ULL - 0x000, d.Value()); +} + +TEST(LabelChain, AssignEndValueAfterForward) { + Label a, b, c, d; + b = a + 0x1; + c = b + 0x10; + d = c + 0x100; + d = 0x99b8f51bafd41adaULL; + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x111, a.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x110, b.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x100, c.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x000, d.Value()); +} + +TEST(LabelChain, AssignEndValueAfterBackward) { + Label a, b, c, d; + d = c + 0x100; + c = b + 0x10; + b = a + 0x1; + d = 0xc86ca1d97ab5df6eULL; + EXPECT_EQ(0xc86ca1d97ab5df6eULL - 0x111, a.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL - 0x110, b.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL - 0x100, c.Value()); + EXPECT_EQ(0xc86ca1d97ab5df6eULL - 0x000, d.Value()); +} + +TEST(LabelChain, ConstructStartRelationBeforeForward) { + Label x; + Label a(x); + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, ConstructStartRelationAfterForward) { + Label x; + Label a; + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + a = x; + EXPECT_EQ(0x111U, d-x); + EXPECT_EQ(0x11U, c-x); + EXPECT_EQ(0x1U, b-x); + EXPECT_EQ(0U, a-x); +} + +TEST(LabelChain, ConstructStartValueBeforeForward) { + Label a(0x5d234d177d01ccc8ULL); + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + EXPECT_EQ(0x5d234d177d01ccc8ULL + 0x111U, d.Value()); + EXPECT_EQ(0x5d234d177d01ccc8ULL + 0x011U, c.Value()); + EXPECT_EQ(0x5d234d177d01ccc8ULL + 0x001U, b.Value()); + EXPECT_EQ(0x5d234d177d01ccc8ULL + 0x000U, a.Value()); +} + +TEST(LabelChain, ConstructStartValueAfterForward) { + Label a; + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + a = 0xded85d54586e84fcULL; + EXPECT_EQ(0xded85d54586e84fcULL + 0x111U, d.Value()); + EXPECT_EQ(0xded85d54586e84fcULL + 0x011U, c.Value()); + EXPECT_EQ(0xded85d54586e84fcULL + 0x001U, b.Value()); + EXPECT_EQ(0xded85d54586e84fcULL + 0x000U, a.Value()); +} + +TEST(LabelChain, ConstructEndRelationAfterForward) { + Label x; + Label a; + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + x = d; + EXPECT_EQ(-(u_int64_t)0x111U, a-x); + EXPECT_EQ(-(u_int64_t)0x110U, b-x); + EXPECT_EQ(-(u_int64_t)0x100U, c-x); + EXPECT_EQ(-(u_int64_t)0x000U, d-x); +} + +TEST(LabelChain, ConstructEndValueAfterForward) { + Label a; + Label b(a + 0x1); + Label c(b + 0x10); + Label d(c + 0x100); + d = 0x99b8f51bafd41adaULL; + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x111, a.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x110, b.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x100, c.Value()); + EXPECT_EQ(0x99b8f51bafd41adaULL - 0x000, d.Value()); +} + +TEST(LabelTree, KnownValue) { + Label l, m, n, o, p; + l = m; + m = n; + o = p; + p = n; + l = 0x536b5de3d468a1b5ULL; + EXPECT_EQ(0x536b5de3d468a1b5ULL, o.Value()); +} + +TEST(LabelTree, Related) { + Label l, m, n, o, p; + l = m - 1; + m = n - 10; + o = p + 100; + p = n + 1000; + EXPECT_EQ(1111U, o - l); +} + +TEST(EquationDeathTest, EqualConstants) { + Label m = 0x0d3962f280f07d24ULL; + Label n = 0x0d3962f280f07d24ULL; + m = n; // no death expected +} + +TEST(EquationDeathTest, EqualIndirectConstants) { + Label m = 0xa347f1e5238fe6a1ULL; + Label n; + Label o = n; + n = 0xa347f1e5238fe6a1ULL; + n = m; // no death expected +} + +TEST(EquationDeathTest, ConstantClash) { + Label m = 0xd4cc0f4f630ec741ULL; + Label n = 0x934cd2d8254fc3eaULL; + ASSERT_DEATH(m = n, "addend_ == addend"); +} + +TEST(EquationDeathTest, IndirectConstantClash) { + Label m = 0xd4cc0f4f630ec741ULL; + Label n, o; + n = o; + o = 0xcfbe3b83ac49ce86ULL; + ASSERT_DEATH(m = n, "addend_ == addend"); +} + +// Assigning to a related label may free the next Binding on its +// chain. This test always passes; it is interesting to memory +// checkers and coverage analysis. +TEST(LabelReferenceCount, AssignmentFree) { + Label l; + { + Label m; + l = m; + } + // This should free m's Binding. + l = 0xca8bae92f0376d4fULL; + ASSERT_EQ(0xca8bae92f0376d4fULL, l.Value()); +} + +// Finding the value of a label may free the Binding it refers to. This test +// always passes; it is interesting to memory checkers and coverage analysis. +TEST(LabelReferenceCount, FindValueFree) { + Label l; + { + Label m, n; + l = m; + m = n; + n = 0x7a0b0c576672daafULL; + // At this point, l's Binding refers to m's Binding, which refers + // to n's binding. + } + // Now, l is the only reference keeping the three Bindings alive. + // Resolving its value should free l's and m's original bindings. + ASSERT_EQ(0x7a0b0c576672daafULL, l.Value()); +} + +TEST(ConstructSection, Simple) { + Section s; +} + +TEST(ConstructSection, WithEndian) { + Section s(kBigEndian); +} + +// A fixture class for TestAssembler::Section tests. +class SectionFixture { + public: + Section section; + string contents; + static const u_int8_t data[]; + static const size_t data_size; +}; + +const u_int8_t SectionFixture::data[] = { + 0x87, 0x4f, 0x43, 0x67, 0x30, 0xd0, 0xd4, 0x0e +}; + +#define I0() +#define I1(a) { a } +#define I2(a,b) { a,b } +#define I3(a,b,c) { a,b,c } +#define I4(a,b,c,d) { a,b,c,d } +#define I5(a,b,c,d,e) { a,b,c,d,e } +#define I6(a,b,c,d,e,f) { a,b,c,d,e,f } +#define I7(a,b,c,d,e,f,g) { a,b,c,d,e,f,g } +#define I8(a,b,c,d,e,f,g,h) { a,b,c,d,e,f,g,h } +#define I9(a,b,c,d,e,f,g,h,i) { a,b,c,d,e,f,g,h,i } +#define ASSERT_BYTES(s, b) \ + do \ + { \ + static const u_int8_t expected_bytes[] = b; \ + ASSERT_EQ(sizeof(expected_bytes), s.size()); \ + ASSERT_TRUE(memcmp(s.data(), (const char *) expected_bytes, \ + sizeof(expected_bytes)) == 0); \ + } \ + while(0) + +class Append: public SectionFixture, public Test { }; + +TEST_F(Append, Bytes) { + section.Append(data, sizeof(data)); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_EQ(sizeof(data), contents.size()); + EXPECT_TRUE(0 == memcmp(contents.data(), (const char *) data, sizeof(data))); +} + +TEST_F(Append, BytesTwice) { + section.Append(data, sizeof(data)); + section.Append(data, sizeof(data)); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_EQ(2 * sizeof(data), contents.size()); + ASSERT_TRUE(0 == memcmp(contents.data(), (const char *) data, sizeof(data))); + ASSERT_TRUE(0 == memcmp(contents.data() + sizeof(data), + (const char *) data, sizeof(data))); +} + +TEST_F(Append, String) { + string s1 = "howdy "; + string s2 = "there"; + section.Append(s1); + section.Append(s2); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_STREQ(contents.c_str(), "howdy there"); +} + +TEST_F(Append, RepeatedBytes) { + section.Append((size_t) 10, '*'); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_STREQ(contents.c_str(), "**********"); +} + +TEST_F(Append, GeneralLE1) { + section.Append(kLittleEndian, 1, 42); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I1(42)); +} + +TEST_F(Append, GeneralLE2) { + section.Append(kLittleEndian, 2, 0x15a1); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0xa1, 0x15)); +} + +TEST_F(Append, GeneralLE3) { + section.Append(kLittleEndian, 3, 0x59ae8d); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x8d, 0xae, 0x59)); +} + +TEST_F(Append, GeneralLE4) { + section.Append(kLittleEndian, 4, 0x51603c56); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I4(0x56, 0x3c, 0x60, 0x51)); +} + +TEST_F(Append, GeneralLE5) { + section.Append(kLittleEndian, 5, 0x385e2803b4ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0xb4, 0x03, 0x28, 0x5e, 0x38)); +} + +TEST_F(Append, GeneralLE6) { + section.Append(kLittleEndian, 6, 0xc7db9534dd1fULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I6(0x1f, 0xdd, 0x34, 0x95, 0xdb, 0xc7)); +} + +TEST_F(Append, GeneralLE7) { + section.Append(kLittleEndian, 7, 0x1445c9f1b843e6ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I7(0xe6, 0x43, 0xb8, 0xf1, 0xc9, 0x45, 0x14)); +} + +TEST_F(Append, GeneralLE8) { + section.Append(kLittleEndian, 8, 0xaf48019dfe5c01e5ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I8(0xe5, 0x01, 0x5c, 0xfe, 0x9d, 0x01, 0x48, 0xaf)); +} + +TEST_F(Append, GeneralBE1) { + section.Append(kBigEndian, 1, 0xd0ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I1(0xd0)); +} + +TEST_F(Append, GeneralBE2) { + section.Append(kBigEndian, 2, 0x2e7eULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2e, 0x7e)); +} + +TEST_F(Append, GeneralBE3) { + section.Append(kBigEndian, 3, 0x37dad6ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x37, 0xda, 0xd6)); +} + +TEST_F(Append, GeneralBE4) { + section.Append(kBigEndian, 4, 0x715935c7ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I4(0x71, 0x59, 0x35, 0xc7)); +} + +TEST_F(Append, GeneralBE5) { + section.Append(kBigEndian, 5, 0x42baeb02b7ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x42, 0xba, 0xeb, 0x02, 0xb7)); +} + +TEST_F(Append, GeneralBE6) { + section.Append(kBigEndian, 6, 0xf1cdf10e7b18ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I6(0xf1, 0xcd, 0xf1, 0x0e, 0x7b, 0x18)); +} + +TEST_F(Append, GeneralBE7) { + section.Append(kBigEndian, 7, 0xf50a724f0b0d20ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I7(0xf5, 0x0a, 0x72, 0x4f, 0x0b, 0x0d, 0x20)); +} + +TEST_F(Append, GeneralBE8) { + section.Append(kBigEndian, 8, 0xa6b2cb5e98dc9c16ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I8(0xa6, 0xb2, 0xcb, 0x5e, 0x98, 0xdc, 0x9c, 0x16)); +} + +TEST_F(Append, GeneralLE1Label) { + Label l; + section.Append(kLittleEndian, 1, l); + l = 42; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I1(42)); +} + +TEST_F(Append, GeneralLE2Label) { + Label l; + section.Append(kLittleEndian, 2, l); + l = 0x15a1; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0xa1, 0x15)); +} + +TEST_F(Append, GeneralLE3Label) { + Label l; + section.Append(kLittleEndian, 3, l); + l = 0x59ae8d; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x8d, 0xae, 0x59)); +} + +TEST_F(Append, GeneralLE4Label) { + Label l; + section.Append(kLittleEndian, 4, l); + l = 0x51603c56; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I4(0x56, 0x3c, 0x60, 0x51)); +} + +TEST_F(Append, GeneralLE5Label) { + Label l; + section.Append(kLittleEndian, 5, l); + l = 0x385e2803b4ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0xb4, 0x03, 0x28, 0x5e, 0x38)); +} + +TEST_F(Append, GeneralLE6Label) { + Label l; + section.Append(kLittleEndian, 6, l); + l = 0xc7db9534dd1fULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I6(0x1f, 0xdd, 0x34, 0x95, 0xdb, 0xc7)); +} + +TEST_F(Append, GeneralLE7Label) { + Label l; + section.Append(kLittleEndian, 7, l); + l = 0x1445c9f1b843e6ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I7(0xe6, 0x43, 0xb8, 0xf1, 0xc9, 0x45, 0x14)); +} + +TEST_F(Append, GeneralLE8Label) { + Label l; + section.Append(kLittleEndian, 8, l); + l = 0xaf48019dfe5c01e5ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I8(0xe5, 0x01, 0x5c, 0xfe, 0x9d, 0x01, 0x48, 0xaf)); +} + +TEST_F(Append, GeneralBE1Label) { + Label l; + section.Append(kBigEndian, 1, l); + l = 0xd0ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I1(0xd0)); +} + +TEST_F(Append, GeneralBE2Label) { + Label l; + section.Append(kBigEndian, 2, l); + l = 0x2e7eULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2e, 0x7e)); +} + +TEST_F(Append, GeneralBE3Label) { + Label l; + section.Append(kBigEndian, 3, l); + l = 0x37dad6ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x37, 0xda, 0xd6)); +} + +TEST_F(Append, GeneralBE4Label) { + Label l; + section.Append(kBigEndian, 4, l); + l = 0x715935c7ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I4(0x71, 0x59, 0x35, 0xc7)); +} + +TEST_F(Append, GeneralBE5Label) { + Label l; + section.Append(kBigEndian, 5, l); + l = 0x42baeb02b7ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x42, 0xba, 0xeb, 0x02, 0xb7)); +} + +TEST_F(Append, GeneralBE6Label) { + Label l; + section.Append(kBigEndian, 6, l); + l = 0xf1cdf10e7b18ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I6(0xf1, 0xcd, 0xf1, 0x0e, 0x7b, 0x18)); +} + +TEST_F(Append, GeneralBE7Label) { + Label l; + section.Append(kBigEndian, 7, l); + l = 0xf50a724f0b0d20ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I7(0xf5, 0x0a, 0x72, 0x4f, 0x0b, 0x0d, 0x20)); +} + +TEST_F(Append, GeneralBE8Label) { + Label l; + section.Append(kBigEndian, 8, l); + l = 0xa6b2cb5e98dc9c16ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I8(0xa6, 0xb2, 0xcb, 0x5e, 0x98, 0xdc, 0x9c, 0x16)); +} + +TEST_F(Append, B8) { + section.Append(1, 0x2a); + section.B8(0xd3U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0xd3)); +} + +TEST_F(Append, B8Label) { + Label l; + section.Append(1, 0x2a); + section.B8(l); + l = 0x4bU; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0x4b)); +} + +TEST_F(Append, B16) { + section.Append(1, 0x2a); + section.B16(0x472aU); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x47, 0x2a)); +} + +TEST_F(Append, B16Label) { + Label l; + section.Append(1, 0x2a); + section.B16(l); + l = 0x55e8U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x55, 0xe8)); +} + +TEST_F(Append, B32) { + section.Append(1, 0x2a); + section.B32(0xbd412cbcU); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0xbd, 0x41, 0x2c, 0xbc)); +} + +TEST_F(Append, B32Label) { + Label l; + section.Append(1, 0x2a); + section.B32(l); + l = 0x208e37d5U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0x20, 0x8e, 0x37, 0xd5)); +} + +TEST_F(Append, B64) { + section.Append(1, 0x2a); + section.B64(0x3402a013111e68adULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0x34, 0x02, 0xa0, 0x13, 0x11, 0x1e, 0x68, 0xad)); +} + +TEST_F(Append, B64Label) { + Label l; + section.Append(1, 0x2a); + section.B64(l); + l = 0x355dbfbb4ac6d57fULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0x35, 0x5d, 0xbf, 0xbb, 0x4a, 0xc6, 0xd5, 0x7f)); +} + +TEST_F(Append, L8) { + section.Append(1, 0x2a); + section.L8(0x26U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0x26)); +} + +TEST_F(Append, L8Label) { + Label l; + section.Append(1, 0x2a); + section.L8(l); + l = 0xa8U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0xa8)); +} + +TEST_F(Append, L16) { + section.Append(1, 0x2a); + section.L16(0xca6dU); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x6d, 0xca)); +} + +TEST_F(Append, L16Label) { + Label l; + section.Append(1, 0x2a); + section.L16(l); + l = 0xd21fU; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x1f, 0xd2)); +} + +TEST_F(Append, L32) { + section.Append(1, 0x2a); + section.L32(0x558f6181U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0x81, 0x61, 0x8f, 0x55)); +} + +TEST_F(Append, L32Label) { + Label l; + section.Append(1, 0x2a); + section.L32(l); + l = 0x4b810f82U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0x82, 0x0f, 0x81, 0x4b)); +} + +TEST_F(Append, L64) { + section.Append(1, 0x2a); + section.L64(0x564384f7579515bfULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0xbf, 0x15, 0x95, 0x57, 0xf7, 0x84, 0x43, 0x56)); +} + +TEST_F(Append, L64Label) { + Label l; + section.Append(1, 0x2a); + section.L64(l); + l = 0x424b1d020667c8dbULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0xdb, 0xc8, 0x67, 0x06, 0x02, 0x1d, 0x4b, 0x42)); +} + +TEST_F(Append, D8Big) { + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D8(0xe6U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0xe6)); +} + +TEST_F(Append, D8BigLabel) { + Label l; + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D8(l); + l = 0xeeU; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0xee)); +} + +TEST_F(Append, D16Big) { + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D16(0x83b1U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x83, 0xb1)); +} + +TEST_F(Append, D16BigLabel) { + Label l; + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D16(l); + l = 0x5b55U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x5b, 0x55)); +} + +TEST_F(Append, D32Big) { + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D32(0xd0b0e431U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0xd0, 0xb0, 0xe4, 0x31)); +} + +TEST_F(Append, D32BigLabel) { + Label l; + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D32(l); + l = 0x312fb340U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0x31, 0x2f, 0xb3, 0x40)); +} + +TEST_F(Append, D64Big) { + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D64(0xb109843500dbcb16ULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0xb1, 0x09, 0x84, 0x35, 0x00, 0xdb, 0xcb, 0x16)); +} + +TEST_F(Append, D64BigLabel) { + Label l; + section.set_endianness(kBigEndian); + section.Append(1, 0x2a); + section.D64(l); + l = 0x9a0d61b70f671fd7ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0x9a, 0x0d, 0x61, 0xb7, 0x0f, 0x67, 0x1f, 0xd7)); +} + +TEST_F(Append, D8Little) { + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D8(0x42U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0x42)); +} + +TEST_F(Append, D8LittleLabel) { + Label l; + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D8(l); + l = 0x05U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I2(0x2a, 0x05)); +} + +TEST_F(Append, D16Little) { + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D16(0xc5c5U); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0xc5, 0xc5)); +} + +TEST_F(Append, D16LittleLabel) { + Label l; + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D16(l); + l = 0xb620U; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I3(0x2a, 0x20, 0xb6)); +} + +TEST_F(Append, D32Little) { + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D32(0x1a87d0feU); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0xfe, 0xd0, 0x87, 0x1a)); +} + +TEST_F(Append, D32LittleLabel) { + Label l; + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D32(l); + l = 0xb8012d6bU; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I5(0x2a, 0x6b, 0x2d, 0x01, 0xb8)); +} + +TEST_F(Append, D64Little) { + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D64(0x42de75c61375a1deULL); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0xde, 0xa1, 0x75, 0x13, 0xc6, 0x75, 0xde, 0x42)); +} + +TEST_F(Append, D64LittleLabel) { + Label l; + section.set_endianness(kLittleEndian); + section.Append(1, 0x2a); + section.D64(l); + l = 0x8b3bececf3fb5312ULL; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, + I9(0x2a, 0x12, 0x53, 0xfb, 0xf3, 0xec, 0xec, 0x3b, 0x8b)); +} + +TEST_F(Append, Variety) { + Label a, b, c, d, e, f, g, h; + section.Append(kBigEndian, 1, a) + .Append(kLittleEndian, 8, h) + .Append(kBigEndian, 1, 0x8bULL) + .Append(kLittleEndian, 8, 0x0ea56540448f4439ULL) + .Append(kBigEndian, 2, b) + .Append(kLittleEndian, 7, g) + .Append(kBigEndian, 2, 0xcf15ULL) + .Append(kLittleEndian, 7, 0x29694f04c5724aULL) + .Append(kBigEndian, 3, c) + .Append(kLittleEndian, 6, f) + .Append(kBigEndian, 3, 0x8c3ffdULL) + .Append(kLittleEndian, 6, 0x6f11ba80187aULL) + .Append(kBigEndian, 4, d) + .Append(kLittleEndian, 5, e) + .Append(kBigEndian, 4, 0x2fda2472ULL) + .Append(kLittleEndian, 5, 0x0aa02d423fULL) + .Append(kBigEndian, 5, e) + .Append(kLittleEndian, 4, d) + .Append(kBigEndian, 5, 0x53ba432138ULL) + .Append(kLittleEndian, 4, 0xf139ae60ULL) + .Append(kBigEndian, 6, f) + .Append(kLittleEndian, 3, c) + .Append(kBigEndian, 6, 0x168e436af716ULL) + .Append(kLittleEndian, 3, 0x3ef189ULL) + .Append(kBigEndian, 7, g) + .Append(kLittleEndian, 2, b) + .Append(kBigEndian, 7, 0xacd4ef233e47d9ULL) + .Append(kLittleEndian, 2, 0x5311ULL) + .Append(kBigEndian, 8, h) + .Append(kLittleEndian, 1, a) + .Append(kBigEndian, 8, 0x4668d5f1c93637a1ULL) + .Append(kLittleEndian, 1, 0x65ULL); + a = 0x79ac9bd8aa256b35ULL; + b = 0x22d13097ef86c91cULL; + c = 0xf204968b0a05862fULL; + d = 0x163177f15a0eb4ecULL; + e = 0xbd1b0f1d977f2246ULL; + f = 0x2b0842eee83c6461ULL; + g = 0x92f4b928a4bf875eULL; + h = 0x61a199a8f7286ba6ULL; + ASSERT_EQ(8 * 18U, section.Size()); + ASSERT_TRUE(section.GetContents(&contents)); + + static const u_int8_t expected[] = { + 0x35, 0xa6, 0x6b, 0x28, 0xf7, 0xa8, 0x99, 0xa1, 0x61, + 0x8b, 0x39, 0x44, 0x8f, 0x44, 0x40, 0x65, 0xa5, 0x0e, + 0xc9, 0x1c, 0x5e, 0x87, 0xbf, 0xa4, 0x28, 0xb9, 0xf4, + 0xcf, 0x15, 0x4a, 0x72, 0xc5, 0x04, 0x4f, 0x69, 0x29, + 0x05, 0x86, 0x2f, 0x61, 0x64, 0x3c, 0xe8, 0xee, 0x42, + 0x8c, 0x3f, 0xfd, 0x7a, 0x18, 0x80, 0xba, 0x11, 0x6f, + 0x5a, 0x0e, 0xb4, 0xec, 0x46, 0x22, 0x7f, 0x97, 0x1d, + 0x2f, 0xda, 0x24, 0x72, 0x3f, 0x42, 0x2d, 0xa0, 0x0a, + 0x1d, 0x97, 0x7f, 0x22, 0x46, 0xec, 0xb4, 0x0e, 0x5a, + 0x53, 0xba, 0x43, 0x21, 0x38, 0x60, 0xae, 0x39, 0xf1, + 0x42, 0xee, 0xe8, 0x3c, 0x64, 0x61, 0x2f, 0x86, 0x05, + 0x16, 0x8e, 0x43, 0x6a, 0xf7, 0x16, 0x89, 0xf1, 0x3e, + 0xf4, 0xb9, 0x28, 0xa4, 0xbf, 0x87, 0x5e, 0x1c, 0xc9, + 0xac, 0xd4, 0xef, 0x23, 0x3e, 0x47, 0xd9, 0x11, 0x53, + 0x61, 0xa1, 0x99, 0xa8, 0xf7, 0x28, 0x6b, 0xa6, 0x35, + 0x46, 0x68, 0xd5, 0xf1, 0xc9, 0x36, 0x37, 0xa1, 0x65, + }; + + ASSERT_TRUE(0 == memcmp(contents.data(), expected, sizeof(expected))); +} + +TEST_F(Append, Section) { + section.Append("murder"); + { + Section middle; + middle.Append(" she"); + section.Append(middle); + } + section.Append(" wrote"); + EXPECT_EQ(16U, section.Size()); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_STREQ(contents.c_str(), "murder she wrote"); +} + +TEST_F(Append, SectionRefs) { + section.Append("sugar "); + Label l; + { + Section middle; + Label m; + middle.B32(m); + section.Append(middle); + m = 0x66726565; + } + section.Append(" jazz"); + EXPECT_EQ(15U, section.Size()); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_STREQ(contents.c_str(), "sugar free jazz"); +} + +TEST_F(Append, LEB128_0) { + section.LEB128(0); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\0", 1), contents); +} + +TEST_F(Append, LEB128_0x3f) { + section.LEB128(0x3f); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x3f", 1), contents); +} + +TEST_F(Append, LEB128_0x40) { + section.LEB128(0x40); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xc0\x00", 2), contents); +} + +TEST_F(Append, LEB128_0x7f) { + section.LEB128(0x7f); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x00", 2), contents); +} + +TEST_F(Append, LEB128_0x80) { + section.LEB128(0x80); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x01", 2), contents); +} + +TEST_F(Append, LEB128_0xff) { + section.LEB128(0xff); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x01", 2), contents); +} + +TEST_F(Append, LEB128_0x1fff) { + section.LEB128(0x1fff); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x3f", 2), contents); +} + +TEST_F(Append, LEB128_0x2000) { + section.LEB128(0x2000); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\xc0\x00", 3), contents); +} + +TEST_F(Append, LEB128_n1) { + section.LEB128(-1); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x7f", 1), contents); +} + +TEST_F(Append, LEB128_n0x40) { + section.LEB128(-0x40); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x40", 1), contents); +} + +TEST_F(Append, LEB128_n0x41) { + section.LEB128(-0x41); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xbf\x7f", 2), contents); +} + +TEST_F(Append, LEB128_n0x7f) { + section.LEB128(-0x7f); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x81\x7f", 2), contents); +} + +TEST_F(Append, LEB128_n0x80) { + section.LEB128(-0x80); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x7f", 2), contents); +} + +TEST_F(Append, LEB128_n0x2000) { + section.LEB128(-0x2000); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x40", 2), contents); +} + +TEST_F(Append, LEB128_n0x2001) { + section.LEB128(-0x2001); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\xbf\x7f", 3), contents); +} + +TEST_F(Append,ULEB128_0) { + section.ULEB128(0); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\0", 1), contents); +} + +TEST_F(Append,ULEB128_1) { + section.ULEB128(1); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x01", 1), contents); +} + +TEST_F(Append,ULEB128_0x3f) { + section.ULEB128(0x3f); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x3f", 1), contents); +} + +TEST_F(Append,ULEB128_0x40) { + section.ULEB128(0x40); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x40", 1), contents); +} + +TEST_F(Append,ULEB128_0x7f) { + section.ULEB128(0x7f); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x7f", 1), contents); +} + +TEST_F(Append,ULEB128_0x80) { + section.ULEB128(0x80); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x01", 2), contents); +} + +TEST_F(Append,ULEB128_0xff) { + section.ULEB128(0xff); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x01", 2), contents); +} + +TEST_F(Append,ULEB128_0x100) { + section.ULEB128(0x100); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x02", 2), contents); +} + +TEST_F(Append,ULEB128_0x1fff) { + section.ULEB128(0x1fff); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x3f", 2), contents); +} + +TEST_F(Append,ULEB128_0x2000) { + section.ULEB128(0x2000); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x40", 2), contents); +} + +TEST_F(Append,ULEB128_0x3fff) { + section.ULEB128(0x3fff); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xff\x7f", 2), contents); +} + +TEST_F(Append,ULEB128_0x4000) { + section.ULEB128(0x4000); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x80\x01", 3), contents); +} + +TEST_F(Append,ULEB128_12857) { + section.ULEB128(12857); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\xb9\x64", 2), contents); +} + +TEST_F(Append, LEBChain) { + section.LEB128(-0x80).ULEB128(12857).Append("*"); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(string("\x80\x7f\xb9\x64*", 5), contents); +} + + +class GetContents: public SectionFixture, public Test { }; + +TEST_F(GetContents, Undefined) { + Label l; + section.Append(kLittleEndian, 8, l); + ASSERT_FALSE(section.GetContents(&contents)); +} + +TEST_F(GetContents, ClearsContents) { + section.Append((size_t) 10, '*'); + EXPECT_EQ(10U, section.Size()); + EXPECT_TRUE(section.GetContents(&contents)); + EXPECT_EQ(0U, section.Size()); +} + +TEST_F(GetContents, ClearsReferences) { + Label l; + section.Append(kBigEndian, 1, l); + l = 42; + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_BYTES(contents, I1(42)); + ASSERT_TRUE(section.GetContents(&contents)); // should not die +} + +class Miscellanea: public SectionFixture, public Test { }; + +TEST_F(Miscellanea, Clear) { + section.Append("howdy"); + Label l; + section.L32(l); + EXPECT_EQ(9U, section.Size()); + section.Clear(); + EXPECT_EQ(0U, section.Size()); + l = 0x8d231bf0U; + ASSERT_TRUE(section.GetContents(&contents)); // should not die +} + +TEST_F(Miscellanea, Align) { + section.Append("*"); + EXPECT_EQ(1U, section.Size()); + section.Align(4).Append("*"); + EXPECT_EQ(5U, section.Size()); + section.Append("*").Align(2); + EXPECT_EQ(6U, section.Size()); +} + +TEST_F(Miscellanea, AlignPad) { + section.Append("*"); + EXPECT_EQ(1U, section.Size()); + section.Align(4, ' ').Append("*"); + EXPECT_EQ(5U, section.Size()); + section.Append("*").Align(2, ' '); + EXPECT_EQ(6U, section.Size()); + ASSERT_TRUE(section.GetContents(&contents)); + ASSERT_EQ(string("* **"), contents); +} + +TEST_F(Miscellanea, StartHereMark) { + Label m; + section.Append(42, ' ').Mark(&m).Append(13, '+'); + EXPECT_EQ(42U, m - section.start()); + EXPECT_EQ(42U + 13U, section.Here() - section.start()); + EXPECT_FALSE(section.start().IsKnownConstant()); + EXPECT_FALSE(m.IsKnownConstant()); + EXPECT_FALSE(section.Here().IsKnownConstant()); +} + +TEST_F(Miscellanea, Endianness) { + section.set_endianness(kBigEndian); + EXPECT_EQ(kBigEndian, section.endianness()); + section.set_endianness(kLittleEndian); + EXPECT_EQ(kLittleEndian, section.endianness()); +} |