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[rpcsx-os] export backtrace api

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This commit is contained in:
DH 2023-07-07 14:23:54 +03:00
parent 820a97ddec
commit cf9add7209
4 changed files with 139 additions and 125 deletions
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121
rpcsx-os/backtrace.cpp Normal file
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#include "backtrace.hpp"
#include <cinttypes>
#include <cstdio>
#include <libunwind.h>
#include <link.h>
#include <orbis/thread/Process.hpp>
#include <ucontext.h>
std::size_t rx::printAddressLocation(char *dest, std::size_t destLen,
orbis::Thread *thread,
std::uint64_t address) {
if (thread == nullptr || address == 0) {
return 0;
}
for (auto [id, module] : thread->tproc->modulesMap) {
auto moduleBase = reinterpret_cast<std::uint64_t>(module->base);
if (moduleBase > address || moduleBase + module->size <= address) {
continue;
}
return std::snprintf(dest, destLen, "%s+%#" PRIx64, module->soName,
address - moduleBase);
}
return 0;
}
void rx::printStackTrace(ucontext_t *context, int fileno) {
unw_cursor_t cursor;
char buffer[1024];
if (int r = unw_init_local2(&cursor, context, UNW_INIT_SIGNAL_FRAME)) {
int len = snprintf(buffer, sizeof(buffer), "unw_init_local: %s\n",
unw_strerror(r));
write(fileno, buffer, len);
return;
}
char functionName[256];
int count = 0;
do {
unw_word_t ip;
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_word_t off;
int proc_res =
unw_get_proc_name(&cursor, functionName, sizeof(functionName), &off);
Dl_info dlinfo;
int dladdr_res = ::dladdr((void *)ip, &dlinfo);
unsigned long baseAddress =
dladdr_res != 0 ? reinterpret_cast<std::uint64_t>(dlinfo.dli_fbase) : 0;
int len = snprintf(buffer, sizeof(buffer), "%3d: %s+%p: %s(%lx)+%#lx\n",
count, (dladdr_res != 0 ? dlinfo.dli_fname : "??"),
reinterpret_cast<void *>(ip - baseAddress),
(proc_res == 0 ? functionName : "??"),
reinterpret_cast<unsigned long>(
proc_res == 0 ? ip - baseAddress - off : 0),
static_cast<unsigned long>(proc_res == 0 ? off : 0));
write(fileno, buffer, len);
count++;
} while (unw_step(&cursor) > 0 && count < 32);
}
void rx::printStackTrace(ucontext_t *context, orbis::Thread *thread,
int fileno) {
unw_cursor_t cursor;
char buffer[1024];
if (int r = unw_init_local2(&cursor, context, UNW_INIT_SIGNAL_FRAME)) {
int len = snprintf(buffer, sizeof(buffer), "unw_init_local: %s\n",
unw_strerror(r));
write(fileno, buffer, len);
return;
}
int count = 0;
char functionName[256];
do {
unw_word_t ip;
unw_get_reg(&cursor, UNW_REG_IP, &ip);
std::size_t offset = 0;
offset +=
std::snprintf(buffer + offset, sizeof(buffer) - offset, "%3d: ", count);
if (auto loc = printAddressLocation(buffer + offset,
sizeof(buffer) - offset, thread, ip)) {
offset += loc;
offset += std::snprintf(buffer + offset, sizeof(buffer) - offset, "\n");
} else {
unw_word_t off;
int proc_res =
unw_get_proc_name(&cursor, functionName, sizeof(functionName), &off);
Dl_info dlinfo;
int dladdr_res = ::dladdr((void *)ip, &dlinfo);
unsigned long baseAddress =
dladdr_res != 0 ? reinterpret_cast<std::uint64_t>(dlinfo.dli_fbase)
: 0;
offset = snprintf(buffer, sizeof(buffer), "%3d: %s+%p: %s(%lx)+%#lx\n",
count, (dladdr_res != 0 ? dlinfo.dli_fname : "??"),
reinterpret_cast<void *>(ip - baseAddress),
(proc_res == 0 ? functionName : "??"),
reinterpret_cast<unsigned long>(
proc_res == 0 ? ip - baseAddress - off : 0),
static_cast<unsigned long>(proc_res == 0 ? off : 0));
}
write(fileno, buffer, offset);
count++;
} while (unw_step(&cursor) > 0 && count < 32);
}