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Fix some shadow variables, including one in file_id.cc that causes all files to generate the same hash. Add a test to make sure this doesn't happen again.

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Review URL: http://breakpad.appspot.com/316002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@875 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
thestig@chromium.org 2011-10-20 18:23:01 +00:00
parent 70698339f6
commit 11582abc27
6 changed files with 127 additions and 30 deletions
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18
src/common/linux/file_id.cc
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@ -107,10 +107,10 @@ static void FindElfClassSection(const char *elf_base,
const Shdr* section = NULL;
for (int i = 0; i < elf_header->e_shnum; ++i) {
if (sections[i].sh_type == section_type) {
const char* section_name = (char*)(elf_base +
string_section->sh_offset +
sections[i].sh_name);
if (!my_strncmp(section_name, section_name, name_len)) {
const char* current_section_name = (char*)(elf_base +
string_section->sh_offset +
sections[i].sh_name);
if (!my_strncmp(current_section_name, section_name, name_len)) {
section = &sections[i];
break;
}
@ -166,8 +166,7 @@ static bool FindElfSection(const void *elf_mapped_base,
template<typename ElfClass>
static bool ElfClassBuildIDNoteIdentifier(const void *section,
uint8_t identifier[kMDGUIDSize])
{
uint8_t identifier[kMDGUIDSize]) {
typedef typename ElfClass::Nhdr Nhdr;
const Nhdr* note_header = reinterpret_cast<const Nhdr*>(section);
@ -190,8 +189,7 @@ static bool ElfClassBuildIDNoteIdentifier(const void *section,
// Attempt to locate a .note.gnu.build-id section in an ELF binary
// and copy as many bytes of it as will fit into |identifier|.
static bool FindElfBuildIDNote(const void *elf_mapped_base,
uint8_t identifier[kMDGUIDSize])
{
uint8_t identifier[kMDGUIDSize]) {
void* note_section;
int note_size, elfclass;
if (!FindElfSection(elf_mapped_base, ".note.gnu.build-id", SHT_NOTE,
@ -213,7 +211,6 @@ static bool FindElfBuildIDNote(const void *elf_mapped_base,
// a simple hash by XORing the first page worth of bytes into |identifier|.
static bool HashElfTextSection(const void *elf_mapped_base,
uint8_t identifier[kMDGUIDSize]) {
void* text_section;
int text_size;
if (!FindElfSection(elf_mapped_base, ".text", SHT_PROGBITS,
@ -235,8 +232,7 @@ static bool HashElfTextSection(const void *elf_mapped_base,
// static
bool FileID::ElfFileIdentifierFromMappedFile(void* base,
uint8_t identifier[kMDGUIDSize])
{
uint8_t identifier[kMDGUIDSize]) {
// Look for a build id note first.
if (FindElfBuildIDNote(base, identifier))
return true;