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#include <stdio.h>
#include "google_breakpad/processor/minidump.h"
#include "nscore.h"
using namespace google_breakpad;
// Return true if the specified minidump contains a stream of |stream_type|.
extern "C" NS_EXPORT bool DumpHasStream(const char* dump_file,
uint32_t stream_type) {
Minidump dump(dump_file);
if (!dump.Read()) return false;
uint32_t length;
if (!dump.SeekToStreamType(stream_type, &length) || length == 0) return false;
return true;
}
// Return true if the specified minidump contains a memory region
// that contains the instruction pointer from the exception record.
extern "C" NS_EXPORT bool DumpHasInstructionPointerMemory(
const char* dump_file) {
Minidump minidump(dump_file);
if (!minidump.Read()) return false;
MinidumpException* exception = minidump.GetException();
MinidumpMemoryList* memory_list = minidump.GetMemoryList();
if (!exception || !memory_list) {
return false;
}
MinidumpContext* context = exception->GetContext();
if (!context) return false;
uint64_t instruction_pointer;
if (!context->GetInstructionPointer(&instruction_pointer)) {
return false;
}
MinidumpMemoryRegion* region =
memory_list->GetMemoryRegionForAddress(instruction_pointer);
return region != nullptr;
}
// This function tests for a very specific condition. It finds
// an address in a file, "crash-addr", in the CWD. It checks
// that the minidump has a memory region starting at that
// address. The region must be 32 bytes long and contain the
// values 0 to 31 as bytes, in ascending order.
extern "C" NS_EXPORT bool DumpCheckMemory(const char* dump_file) {
Minidump dump(dump_file);
if (!dump.Read()) return false;
MinidumpMemoryList* memory_list = dump.GetMemoryList();
if (!memory_list) {
return false;
}
void* addr;
FILE* fp = fopen("crash-addr", "r");
if (!fp) return false;
if (fscanf(fp, "%p", &addr) != 1) {
fclose(fp);
return false;
}
fclose(fp);
remove("crash-addr");
MinidumpMemoryRegion* region =
memory_list->GetMemoryRegionForAddress(uint64_t(addr));
if (!region) return false;
const uint8_t* chars = region->GetMemory();
if (region->GetSize() != 32) return false;
for (int i = 0; i < 32; i++) {
if (chars[i] != i) return false;
}
return true;
}