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creport: print symbols if they're present

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This commit is contained in:
Michael Scire 2021-10-30 14:18:00 -07:00
parent d2a757c39e
commit 258a83684e
4 changed files with 218 additions and 24 deletions
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13
stratosphere/creport/source/creport_crash_report.cpp
View file

@ -101,11 +101,9 @@ namespace ams::creport {
m_has_extra_info = has_extra_info;
if (this->OpenProcess(process_id)) {
ON_SCOPE_EXIT { this->Close(); };
/* Parse info from the crashed process. */
this->ProcessExceptions();
m_module_list->FindModulesFromThreadInfo(m_debug_handle, m_crashed_thread);
m_module_list->FindModulesFromThreadInfo(m_debug_handle, m_crashed_thread, this->Is64Bit());
m_thread_list->ReadFromProcess(m_debug_handle, m_thread_tls_map, this->Is64Bit());
/* Associate module list to threads. */
@ -120,7 +118,7 @@ namespace ams::creport {
/* Nintendo's creport finds extra modules by looking at all threads if application, */
/* but there's no reason for us not to always go looking. */
for (size_t i = 0; i < m_thread_list->GetThreadCount(); i++) {
m_module_list->FindModulesFromThreadInfo(m_debug_handle, m_thread_list->GetThreadInfo(i));
m_module_list->FindModulesFromThreadInfo(m_debug_handle, m_thread_list->GetThreadInfo(i), this->Is64Bit());
}
/* Cache the module base address to send to fatal. */
@ -324,6 +322,11 @@ namespace ams::creport {
}
}
/* If we're open, we need to close here. */
if (this->IsOpen()) {
this->Close();
}
/* Finalize our heap. */
std::destroy_at(m_module_list);
std::destroy_at(m_thread_list);
@ -358,7 +361,7 @@ namespace ams::creport {
}
void CrashReport::SaveToFile(ScopedFile &file) {
file.WriteFormat("Atmosphère Crash Report (v1.6):\n");
file.WriteFormat("Atmosphère Crash Report (v1.7):\n");
file.WriteFormat("Result: 0x%X (2%03d-%04d)\n\n", m_result.GetValue(), m_result.GetModule(), m_result.GetDescription());

16
stratosphere/creport/source/creport_main.cpp
View file

@ -103,13 +103,17 @@ namespace ams {
g_crash_report.Initialize();
/* Try to debug the crashed process. */
g_crash_report.BuildReport(crashed_pid, has_extra_info);
if (!g_crash_report.IsComplete()) {
return;
}
{
g_crash_report.BuildReport(crashed_pid, has_extra_info);
ON_SCOPE_EXIT { if (g_crash_report.IsOpen()) { g_crash_report.Close(); } };
/* Save report to file. */
g_crash_report.SaveReport(enable_screenshot);
if (!g_crash_report.IsComplete()) {
return;
}
/* Save report to file. */
g_crash_report.SaveReport(enable_screenshot);
}
/* Try to terminate the process, if we should. */
const auto fw_ver = hos::GetVersion();

200
stratosphere/creport/source/creport_modules.cpp
View file

@ -58,26 +58,26 @@ namespace ams::creport {
}
}
void ModuleList::FindModulesFromThreadInfo(os::NativeHandle debug_handle, const ThreadInfo &thread) {
void ModuleList::FindModulesFromThreadInfo(os::NativeHandle debug_handle, const ThreadInfo &thread, bool is_64_bit) {
/* Set the debug handle, for access in other member functions. */
m_debug_handle = debug_handle;
/* Try to add the thread's PC. */
this->TryAddModule(thread.GetPC());
this->TryAddModule(thread.GetPC(), is_64_bit);
/* Try to add the thread's LR. */
this->TryAddModule(thread.GetLR());
this->TryAddModule(thread.GetLR(), is_64_bit);
/* Try to add all the addresses in the thread's stacktrace. */
for (size_t i = 0; i < thread.GetStackTraceSize(); i++) {
this->TryAddModule(thread.GetStackTrace(i));
this->TryAddModule(thread.GetStackTrace(i), is_64_bit);
}
}
void ModuleList::TryAddModule(uintptr_t guess) {
void ModuleList::TryAddModule(uintptr_t guess, bool is_64_bit) {
/* Try to locate module from guess. */
uintptr_t base_address = 0;
if (!this->TryFindModule(std::addressof(base_address), guess)) {
if (!this->TryFindModule(std::addressof(base_address), guess, is_64_bit)) {
return;
}
@ -105,9 +105,18 @@ namespace ams::creport {
module.end_address = mi.base_address + mi.size;
GetModuleName(module.name, module.start_address, module.end_address);
GetModuleId(module.module_id, module.end_address);
/* Some homebrew won't have a name. Add a fake one for readability. */
/* Default to no symbol table. */
module.has_sym_table = false;
if (std::strcmp(module.name, "") == 0) {
/* Some homebrew won't have a name. Add a fake one for readability. */
util::SNPrintf(module.name, sizeof(module.name), "[%02x%02x%02x%02x]", module.module_id[0], module.module_id[1], module.module_id[2], module.module_id[3]);
} else {
/* The module has a name, and so might have a symbol table. Try to add it, if it does. */
if (is_64_bit) {
DetectModuleSymbolTable(module);
}
}
}
@ -125,7 +134,9 @@ namespace ams::creport {
}
}
bool ModuleList::TryFindModule(uintptr_t *out_address, uintptr_t guess) {
bool ModuleList::TryFindModule(uintptr_t *out_address, uintptr_t guess, bool is_64_bit) {
AMS_UNUSED(is_64_bit);
/* Query the memory region our guess falls in. */
svc::MemoryInfo mi;
svc::PageInfo pi;
@ -247,6 +258,133 @@ namespace ams::creport {
}
}
void ModuleList::DetectModuleSymbolTable(ModuleInfo &module) {
/* If we already have a symbol table, no more parsing is needed. */
if (module.has_sym_table) {
return;
}
/* Declare temporaries. */
u64 temp_64;
u32 temp_32;
/* Get module state. */
svc::MemoryInfo mi;
svc::PageInfo pi;
if (R_FAILED(svc::QueryDebugProcessMemory(std::addressof(mi), std::addressof(pi), m_debug_handle, module.start_address))) {
return;
}
const auto module_state = mi.state;
/* Verify .rodata is read-only with same state as .text. */
if (R_FAILED(svc::QueryDebugProcessMemory(std::addressof(mi), std::addressof(pi), m_debug_handle, module.end_address)) || mi.permission != svc::MemoryPermission_Read || mi.state != module_state) {
return;
}
/* Read the first instruction of .text. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address, sizeof(temp_32)))) {
return;
}
/* We want to find the symbol table/.dynamic. */
uintptr_t dyn_address = 0;
uintptr_t sym_tab = 0;
uintptr_t str_tab = 0;
size_t num_sym = 0;
/* Detect module type. */
if (temp_32 == 0) {
/* Module is dynamically loaded by rtld. */
u32 mod_offset;
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(mod_offset)), m_debug_handle, module.start_address + sizeof(u32), sizeof(u32)))) {
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset, sizeof(u32)))) {
return;
}
if (temp_32 != rocrt::ModuleHeaderVersion) { /* MOD0 */
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset + sizeof(u32), sizeof(u32)))) {
return;
}
dyn_address = module.start_address + mod_offset + temp_32;
} else if (temp_32 == 0x14000002) {
/* Module embeds rtld. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + 0x5C, sizeof(u32)))) {
return;
}
if (temp_32 != 0x94000002) {
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + 0x60, sizeof(u32)))) {
return;
}
dyn_address = module.start_address + 0x60 + temp_32;
} else {
/* Module has unknown format. */
return;
}
/* Locate tables inside .dyn. */
for (size_t ofs = 0; /* ... */; ofs += 0x10) {
/* Read the DynamicTag. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_64)), m_debug_handle, dyn_address + ofs, sizeof(u64)))) {
return;
}
if (temp_64 == 0) {
/* We're done parsing .dyn. */
break;
} else if (temp_64 == 4) {
/* We found DT_HASH */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_64)), m_debug_handle, dyn_address + ofs + sizeof(u64), sizeof(u64)))) {
return;
}
/* Read nchain, to get the number of symbols. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + temp_64 + sizeof(u32), sizeof(u32)))) {
return;
}
num_sym = temp_32;
} else if (temp_64 == 5) {
/* We found DT_STRTAB */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_64)), m_debug_handle, dyn_address + ofs + sizeof(u64), sizeof(u64)))) {
return;
}
str_tab = module.start_address + temp_64;
} else if (temp_64 == 6) {
/* We found DT_SYMTAB */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_64)), m_debug_handle, dyn_address + ofs + sizeof(u64), sizeof(u64)))) {
return;
}
sym_tab = module.start_address + temp_64;
}
}
/* Check that we found all the tables. */
if (!(sym_tab != 0 && str_tab != 0 && num_sym != 0)) {
return;
}
module.has_sym_table = true;
module.sym_tab = sym_tab;
module.str_tab = str_tab;
module.num_sym = static_cast<u32>(num_sym);
}
const char *ModuleList::GetFormattedAddressString(uintptr_t address) {
/* Print default formatted string. */
util::SNPrintf(m_address_str_buf, sizeof(m_address_str_buf), "%016lx", address);
@ -255,8 +393,52 @@ namespace ams::creport {
for (size_t i = 0; i < m_num_modules; i++) {
const auto& module = m_modules[i];
if (module.start_address <= address && address < module.end_address) {
if (module.has_sym_table) {
/* Try to locate an appropriate symbol. */
for (size_t j = 0; j < module.num_sym; ++j) {
/* Read symbol from the module's symbol table. */
struct {
u32 st_name;
u8 st_info;
u8 st_other;
u16 st_shndx;
u64 st_value;
u64 st_size;
} sym;
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(sym)), m_debug_handle, module.sym_tab + j * sizeof(sym), sizeof(sym)))) {
break;
}
/* Check the symbol is valid/STT_FUNC. */
if (sym.st_shndx == 0 || ((sym.st_shndx & 0xFF00) == 0xFF00)) {
continue;
}
if ((sym.st_info & 0xF) != 2) {
continue;
}
/* Check the address. */
const uintptr_t func_start = module.start_address + sym.st_value;
if (func_start <= address && address < func_start + sym.st_size) {
/* Read the symbol name. */
const uintptr_t sym_address = module.str_tab + sym.st_name;
char sym_name[0x80];
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(sym_name), m_debug_handle, sym_address, sizeof(sym_name)))) {
break;
}
/* Ensure null-termination. */
sym_name[sizeof(sym_name) - 1] = '\x00';
/* Print the symbol. */
util::SNPrintf(m_address_str_buf, sizeof(m_address_str_buf), "%016lx (%s + 0x%lx) (%s + 0x%lx)", address, module.name, address - module.start_address, sym_name, address - func_start);
return m_address_str_buf;
}
}
}
util::SNPrintf(m_address_str_buf, sizeof(m_address_str_buf), "%016lx (%s + 0x%lx)", address, module.name, address - module.start_address);
break;
return m_address_str_buf;
}
}

13
stratosphere/creport/source/creport_modules.hpp
View file

@ -30,6 +30,10 @@ namespace ams::creport {
u8 module_id[ModuleIdSize];
u64 start_address;
u64 end_address;
bool has_sym_table;
u64 sym_tab;
u64 str_tab;
u32 num_sym;
};
private:
os::NativeHandle m_debug_handle;
@ -37,7 +41,7 @@ namespace ams::creport {
ModuleInfo m_modules[ModuleCountMax];
/* For pretty-printing. */
char m_address_str_buf[0x280];
char m_address_str_buf[1_KB];
public:
ModuleList() : m_debug_handle(os::InvalidNativeHandle), m_num_modules(0) {
std::memset(m_modules, 0, sizeof(m_modules));
@ -51,14 +55,15 @@ namespace ams::creport {
return m_modules[i].start_address;
}
void FindModulesFromThreadInfo(os::NativeHandle debug_handle, const ThreadInfo &thread);
void FindModulesFromThreadInfo(os::NativeHandle debug_handle, const ThreadInfo &thread, bool is_64_bit);
const char *GetFormattedAddressString(uintptr_t address);
void SaveToFile(ScopedFile &file);
private:
bool TryFindModule(uintptr_t *out_address, uintptr_t guess);
void TryAddModule(uintptr_t guess);
bool TryFindModule(uintptr_t *out_address, uintptr_t guess, bool is_64_bit);
void TryAddModule(uintptr_t guess, bool is_64_bit);
void GetModuleName(char *out_name, uintptr_t text_start, uintptr_t ro_start);
void GetModuleId(u8 *out, uintptr_t ro_start);
void DetectModuleSymbolTable(ModuleInfo &module);
};
}