Breakpad Linux dumper: Add unit tests for google_breakpad::Module.

Adjust Module's interface a bit to facilitate testing:
- Make AssignSourceIds something a client can call --- it's perfectly
  well-defined, so this is an okay change.
- Add GetFunctions, GetFiles and FindExistingfile member functions,
  which the test harness will use to get results to examine.

a=jimblandy, r=nealsid


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@466 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
jimblandy 2009-12-23 21:46:00 +00:00
parent 6ed5383245
commit 52cb2c6f42
4 changed files with 350 additions and 12 deletions

View file

@ -29,6 +29,7 @@
#include <cerrno>
#include <cstring>
#include "common/linux/module.h"
namespace google_breakpad {
@ -62,6 +63,11 @@ void Module::AddFunctions(vector<Function *>::iterator begin,
functions_.insert(functions_.end(), begin, end);
}
void Module::GetFunctions(vector<Function *> *vec,
vector<Function *>::iterator i) {
vec->insert(i, functions_.begin(), functions_.end());
}
Module::File *Module::FindFile(const string &name) {
// A tricky bit here. The key of each map entry needs to be a
// pointer to the entry's File's name string. This means that we
@ -90,6 +96,17 @@ Module::File *Module::FindFile(const char *name) {
return FindFile(name_string);
}
Module::File *Module::FindExistingFile(const string &name) {
FileByNameMap::iterator it = files_.find(&name);
return (it == files_.end()) ? NULL : it->second;
}
void Module::GetFiles(vector<File *> *vec) {
vec->clear();
for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); it++)
vec->push_back(it->second);
}
void Module::AssignSourceIds() {
// First, give every source file an id of -1.
for (FileByNameMap::iterator file_it = files_.begin();
@ -129,8 +146,9 @@ bool Module::Write(FILE *stream) {
name_.c_str()))
return ReportError();
// Write out files.
AssignSourceIds();
// Write out files.
for (FileByNameMap::iterator file_it = files_.begin();
file_it != files_.end(); file_it++) {
File *file = file_it->second;

View file

@ -140,9 +140,32 @@ class Module {
File *FindFile(const string &name);
File *FindFile(const char *name);
// Write this module to STREAM in the breakpad symbol format.
// Return true if all goes well, or false if an error occurs. This
// method writes out:
// If this module has a file named NAME, return a pointer to it.
// Otherwise, return NULL.
File *FindExistingFile(const string &name);
// Insert pointers to the functions added to this module at I in
// VEC. (Since this is effectively a copy of the function list, this
// is mostly useful for testing; other uses should probably get a
// more appropriate interface.)
void GetFunctions(vector<Function *> *vec, vector<Function *>::iterator i);
// Clear VEC and fill it with pointers to the Files added to this
// module, sorted by name. (Since this is effectively a copy of the
// function list, this is mostly useful for testing; other uses
// should probably get a more appropriate interface.)
void GetFiles(vector<File *> *vec);
// Find those files in this module that are actually referred to by
// functions' line number data, and assign them source id numbers.
// Set the source id numbers for all other files --- unused by the
// source line data --- to -1. We do this before writing out the
// symbol file, at which point we omit any unused files.
void AssignSourceIds();
// Call AssignSourceIds, and write this module to STREAM in the
// breakpad symbol format. Return true if all goes well, or false if
// an error occurs. This method writes out:
// - a header based on the values given to the constructor,
// - the source files added via FindFile, and finally
// - the functions added via AddFunctions, each with its lines.
@ -152,13 +175,6 @@ class Module {
private:
// Find those files in this module that are actually referred to by
// functions' line number data, and assign them source id numbers.
// Set the source id numbers for all other files --- unused by the
// source line data --- to -1. We do this before writing out the
// symbol file, at which point we omit any unused files.
void AssignSourceIds();
// Report an error that has occurred writing the symbol file, using
// errno to find the appropriate cause. Return false.
static bool ReportError();

View file

@ -0,0 +1,286 @@
// Copyright (c) 2009, 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.
// module_unittest.cc: Unit tests for google_breakpad::Module
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <string>
#include "breakpad_googletest_includes.h"
#include "common/linux/module.h"
using std::string;
using std::vector;
using google_breakpad::Module;
// Return a FILE * referring to a temporary file that will be deleted
// automatically when the stream is closed or the program exits.
FILE *checked_tmpfile() {
FILE *f = tmpfile();
if (!f) {
fprintf(stderr, "error creating temporary file: %s\n", strerror(errno));
exit(1);
}
return f;
}
// Read from STREAM until end of file, and return the contents as a
// string.
string checked_read(FILE *stream) {
string contents;
int c;
while ((c = getc(stream)) != EOF)
contents.push_back(c);
if (ferror(stream)) {
fprintf(stderr, "error reading temporary file contents: %s\n",
strerror(errno));
exit(1);
}
return contents;
}
// Apply 'fflush' to STREAM, and check for errors.
void checked_fflush(FILE *stream) {
if (fflush(stream) == EOF) {
fprintf(stderr, "error flushing temporary file stream: %s\n",
strerror(errno));
exit(1);
}
}
// Apply 'fclose' to STREAM, and check for errors.
void checked_fclose(FILE *stream) {
if (fclose(stream) == EOF) {
fprintf(stderr, "error closing temporary file stream: %s\n",
strerror(errno));
exit(1);
}
}
#define MODULE_NAME "name with spaces"
#define MODULE_OS "os-name"
#define MODULE_ARCH "architecture"
#define MODULE_ID "id-string"
TEST(Write, Header) {
FILE *f = checked_tmpfile();
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
m.Write(f);
checked_fflush(f);
rewind(f);
string contents = checked_read(f);
checked_fclose(f);
EXPECT_STREQ("MODULE os-name architecture id-string name with spaces\n",
contents.c_str());
}
TEST(Write, OneLineFunc) {
FILE *f = checked_tmpfile();
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
Module::File *file = m.FindFile("file_name.cc");
Module::Function *function = new(Module::Function);
function->name_ = "function_name";
function->address_ = 0xe165bf8023b9d9abLL;
function->size_ = 0x1e4bb0eb1cbf5b09LL;
function->parameter_size_ = 0x772beee89114358aLL;
Module::Line line = { 0xe165bf8023b9d9abLL, 0x1e4bb0eb1cbf5b09LL,
file, 67519080 };
function->lines_.push_back(line);
m.AddFunction(function);
m.Write(f);
checked_fflush(f);
rewind(f);
string contents = checked_read(f);
checked_fclose(f);
EXPECT_STREQ("MODULE os-name architecture id-string name with spaces\n"
"FILE 0 file_name.cc\n"
"FUNC e165bf8023b9d9ab 1e4bb0eb1cbf5b09 772beee89114358a"
" function_name\n"
"e165bf8023b9d9ab 1e4bb0eb1cbf5b09 67519080 0\n",
contents.c_str());
}
TEST(Write, RelativeLoadAddress) {
FILE *f = checked_tmpfile();
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
m.SetLoadAddress(0x2ab698b0b6407073LL);
// Some source files. We will expect to see them in lexicographic order.
Module::File *file1 = m.FindFile("filename-b.cc");
Module::File *file2 = m.FindFile("filename-a.cc");
// A function.
Module::Function *function = new(Module::Function);
function->name_ = "A_FLIBBERTIJIBBET::a_will_o_the_wisp(a clown)";
function->address_ = 0xbec774ea5dd935f3LL;
function->size_ = 0x2922088f98d3f6fcLL;
function->parameter_size_ = 0xe5e9aa008bd5f0d0LL;
// Some source lines. The module should not sort these.
Module::Line line1 = { 0xbec774ea5dd935f3LL, 0x1c2be6d6c5af2611LL,
file1, 41676901 };
Module::Line line2 = { 0xdaf35bc123885c04LL, 0xcf621b8d324d0ebLL,
file2, 67519080 };
function->lines_.push_back(line2);
function->lines_.push_back(line1);
m.AddFunction(function);
m.Write(f);
checked_fflush(f);
rewind(f);
string contents = checked_read(f);
checked_fclose(f);
EXPECT_STREQ("MODULE os-name architecture id-string name with spaces\n"
"FILE 0 filename-a.cc\n"
"FILE 1 filename-b.cc\n"
"FUNC 9410dc39a798c580 2922088f98d3f6fc e5e9aa008bd5f0d0"
" A_FLIBBERTIJIBBET::a_will_o_the_wisp(a clown)\n"
"b03cc3106d47eb91 cf621b8d324d0eb 67519080 0\n"
"9410dc39a798c580 1c2be6d6c5af2611 41676901 1\n",
contents.c_str());
}
TEST(Write, OmitUnusedFiles) {
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
// Create some source files.
Module::File *file1 = m.FindFile("filename1");
m.FindFile("filename2"); // not used by any line
Module::File *file3 = m.FindFile("filename3");
// Create a function.
Module::Function *function = new(Module::Function);
function->name_ = "function_name";
function->address_ = 0x9b926d464f0b9384LL;
function->size_ = 0x4f524a4ba795e6a6LL;
function->parameter_size_ = 0xbbe8133a6641c9b7LL;
// Source files that refer to some files, but not others.
Module::Line line1 = { 0x595fa44ebacc1086LL, 0x1e1e0191b066c5b3LL,
file1, 137850127 };
Module::Line line2 = { 0x401ce8c8a12d25e3LL, 0x895751c41b8d2ce2LL,
file3, 28113549 };
function->lines_.push_back(line1);
function->lines_.push_back(line2);
m.AddFunction(function);
m.AssignSourceIds();
vector<Module::File *> vec;
m.GetFiles(&vec);
EXPECT_EQ((size_t) 3, vec.size());
EXPECT_STREQ("filename1", vec[0]->name_.c_str());
EXPECT_NE(-1, vec[0]->source_id_);
// Expect filename2 not to be used.
EXPECT_STREQ("filename2", vec[1]->name_.c_str());
EXPECT_EQ(-1, vec[1]->source_id_);
EXPECT_STREQ("filename3", vec[2]->name_.c_str());
EXPECT_NE(-1, vec[2]->source_id_);
FILE *f = checked_tmpfile();
m.Write(f);
checked_fflush(f);
rewind(f);
string contents = checked_read(f);
checked_fclose(f);
EXPECT_STREQ("MODULE os-name architecture id-string name with spaces\n"
"FILE 0 filename1\n"
"FILE 1 filename3\n"
"FUNC 9b926d464f0b9384 4f524a4ba795e6a6 bbe8133a6641c9b7"
" function_name\n"
"595fa44ebacc1086 1e1e0191b066c5b3 137850127 0\n"
"401ce8c8a12d25e3 895751c41b8d2ce2 28113549 1\n",
contents.c_str());
}
TEST(Construct, AddFunctions) {
FILE *f = checked_tmpfile();
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
// Two functions.
Module::Function *function1 = new(Module::Function);
function1->name_ = "_without_form";
function1->address_ = 0xd35024aa7ca7da5cLL;
function1->size_ = 0x200b26e605f99071LL;
function1->parameter_size_ = 0xf14ac4fed48c4a99LL;
Module::Function *function2 = new(Module::Function);
function2->name_ = "_and_void";
function2->address_ = 0x2987743d0b35b13fLL;
function2->size_ = 0xb369db048deb3010LL;
function2->parameter_size_ = 0x938e556cb5a79988LL;
// Put them in a vector.
vector<Module::Function *> vec;
vec.push_back(function1);
vec.push_back(function2);
m.AddFunctions(vec.begin(), vec.end());
m.Write(f);
checked_fflush(f);
rewind(f);
string contents = checked_read(f);
checked_fclose(f);
EXPECT_STREQ("MODULE os-name architecture id-string name with spaces\n"
"FUNC d35024aa7ca7da5c 200b26e605f99071 f14ac4fed48c4a99"
" _without_form\n"
"FUNC 2987743d0b35b13f b369db048deb3010 938e556cb5a79988"
" _and_void\n",
contents.c_str());
// Check that m.GetFunctions returns the functions we expect.
vec.clear();
m.GetFunctions(&vec, vec.end());
EXPECT_TRUE(vec.end() != find(vec.begin(), vec.end(), function1));
EXPECT_TRUE(vec.end() != find(vec.begin(), vec.end(), function2));
EXPECT_EQ((size_t) 2, vec.size());
}
TEST(Construct, UniqueFiles) {
Module m(MODULE_NAME, MODULE_OS, MODULE_ARCH, MODULE_ID);
Module::File *file1 = m.FindFile("foo");
Module::File *file2 = m.FindFile(string("bar"));
Module::File *file3 = m.FindFile(string("foo"));
Module::File *file4 = m.FindFile("bar");
EXPECT_NE(file1, file2);
EXPECT_EQ(file1, file3);
EXPECT_EQ(file2, file4);
EXPECT_EQ(file1, m.FindExistingFile("foo"));
EXPECT_TRUE(m.FindExistingFile("baz") == NULL);
}

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@ -52,7 +52,8 @@ SRC = ../../..
# dependencies using $(CXX). Value accumulated throughout the file.
CPP_EXECUTABLES =
# Source files whose coverage we are interested in. Value accumulated
# Add the names of source files whose coverage you'd like 'make
# coverage' to report on to this variable. Value accumulated
# throughout the file.
COVERAGE_SOURCES =
@ -79,6 +80,7 @@ dump_stabs.o: dump_stabs.cc
dump_symbols.o: dump_symbols.cc
file_id.o: file_id.cc
module.o: module.cc
COVERAGE_SOURCES += module.cc
stabs_reader.o: stabs_reader.cc
COVERAGE_SOURCES += stabs_reader.cc
@ -132,6 +134,22 @@ clean::
rm -f file_id_unittest
### Unit tests for google_breakpad::Module.
check: check-module_unittest
check-module_unittest: module_unittest
module_unittest: \
gtest-all.o \
gtest_main.o \
module.o \
module_unittest.o \
$(empty)
CPP_EXECUTABLES += module_unittest
module_unittest.o: module_unittest.cc
module_unittest.o: override CPPFLAGS += $(GTEST_CPPFLAGS) $(GMOCK_CPPFLAGS)
clean::
rm -f module_unittest
### Generic compilation rules.
# Link C++ executables using the C++ compiler; see CPP_EXECUTABLES above.