UNLOZE/sm-ext-accelerator-2023
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Dump linux vDSO symbols

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This commit is contained in:
Asher Baker 2019-01-11 23:42:34 +00:00
parent ad9db42aa4
commit 3582376f35
3 changed files with 72 additions and 2 deletions
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4
breakpad.sh
View File

@ -12,9 +12,9 @@ if [ ! -d "depot_tools" ]; then
fi
if [ ! -d "src" ]; then
./depot_tools/fetch --nohooks breakpad
PYTHONDONTWRITEBYTECODE=1 python2.7 ./depot_tools/fetch.py --nohooks breakpad
else
./depot_tools/gclient sync --nohooks
PYTHONDONTWRITEBYTECODE=1 python2.7 ./depot_tools/gclient.py sync --nohooks
fi
if [ ! -d "build" ]; then

37
extension/extension.cpp
View File

@ -487,6 +487,35 @@ class UploadThread: public IThread
#if defined _LINUX
bool UploadSymbolFile(const google_breakpad::CodeModule *module, const char *presubmitToken) {
auto debugFile = module->debug_file();
std::string vdsoOutputPath = "";
if (debugFile == "linux-gate.so") {
char vdsoOutputPathBuffer[512];
g_pSM->BuildPath(Path_SM, vdsoOutputPathBuffer, sizeof(vdsoOutputPathBuffer), "data/dumps/linux-gate.so");
vdsoOutputPath = vdsoOutputPathBuffer;
int auxvStart = 0;
while (environ[auxvStart++] != nullptr);
struct {
int id;
void *value;
} *auxvEntry = (decltype(auxvEntry))&environ[auxvStart];
for (int auxvIndex = 0; true; ++auxvIndex) {
if (auxvEntry[auxvIndex].id == 0) break;
if (auxvEntry[auxvIndex].id != 33) continue; // AT_SYSINFO_EHDR
Elf32_Ehdr *vdsoHdr = (Elf32_Ehdr *)auxvEntry[auxvIndex].value;
auto vdsoSize = vdsoHdr->e_shoff + (vdsoHdr->e_shentsize * vdsoHdr->e_shnum);
void *vdsoBuffer = malloc(vdsoSize);
memcpy(vdsoBuffer, vdsoHdr, vdsoSize);
FILE *vdsoFile = fopen(vdsoOutputPath.c_str(), "wb");
if (vdsoFile) {
fwrite(vdsoBuffer, 1, vdsoSize, vdsoFile);
fclose(vdsoFile);
debugFile = vdsoOutputPath;
}
free(vdsoBuffer);
}
}
if (debugFile[0] != '/') {
return false;
}
@ -522,6 +551,10 @@ class UploadThread: public IThread
// output = output.substr(0, output.find("\n"));
// printf(">>> %s\n", output.c_str());
if (debugFile == vdsoOutputPath) {
unlink(vdsoOutputPath.c_str());
}
IWebForm *form = webternet->CreateForm();
const char *minidumpAccount = g_pSM->GetCoreConfigValue("MinidumpAccount");
@ -691,6 +724,10 @@ class UploadThread: public IThread
const auto &codeFile = module->code_file();
#ifndef WIN32
if (codeFile == "linux-gate.so") {
return kMTSystem;
}
if (codeFile[0] != '/') {
#else
if (codeFile[1] != ':') {

33
test/test.cpp
View File

@ -237,6 +237,35 @@ int main(int argc, char *argv[])
auto module = processState.modules()->GetModuleAtIndex(moduleIndex);
auto debugFile = module->debug_file();
std::string vdsoOutputPath = "";
if (debugFile == "linux-gate.so") {
auto workingDir = getcwd(nullptr, 0);
vdsoOutputPath = workingDir + std::string("/linux-gate.so");
int auxvStart = 0;
while (environ[auxvStart++] != nullptr);
struct {
int id;
void *value;
} *auxvEntry = (decltype(auxvEntry))&environ[auxvStart];
for (int auxvIndex = 0; true; ++auxvIndex) {
if (auxvEntry[auxvIndex].id == 0) break;
if (auxvEntry[auxvIndex].id != 33) continue; // AT_SYSINFO_EHDR
Elf32_Ehdr *vdsoHdr = (Elf32_Ehdr *)auxvEntry[auxvIndex].value;
auto vdsoSize = vdsoHdr->e_shoff + (vdsoHdr->e_shentsize * vdsoHdr->e_shnum);
void *vdsoBuffer = malloc(vdsoSize);
memcpy(vdsoBuffer, vdsoHdr, vdsoSize);
FILE *vdsoFile = fopen(vdsoOutputPath.c_str(), "wb");
if (vdsoFile) {
fwrite(vdsoBuffer, 1, vdsoSize, vdsoFile);
fclose(vdsoFile);
debugFile = vdsoOutputPath;
}
free(vdsoBuffer);
}
free(workingDir);
}
if (debugFile[0] != '/') {
continue;
}
@ -272,6 +301,10 @@ int main(int argc, char *argv[])
auto output = outputStream.str();
output = output.substr(0, output.find("\n"));
printf("%s\n", output.c_str());
if (debugFile == vdsoOutputPath) {
unlink(vdsoOutputPath.c_str());
}
}
#endif
}