sentry-contrib-native-sys 0.3.1

Unofficial FFI bindings to the Sentry Native SDK for Rust.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

#include "sentry_boot.h"

#include "sentry_sync.h"
#include "sentry_uuid.h"
#include "sentry_value.h"

#include <dbghelp.h>
#include <tlhelp32.h>

static bool g_initialized = false;
static sentry_mutex_t g_mutex = SENTRY__MUTEX_INIT;
static sentry_value_t g_modules = { 0 };

#define CV_SIGNATURE 0x53445352

struct CodeViewRecord70 {
    uint32_t signature;
    GUID pdb_signature;
    uint32_t pdb_age;
    char pdb_filename[1];
};

static void
extract_pdb_info(uintptr_t module_addr, sentry_value_t module)
{
    if (!module_addr) {
        return;
    }

    PIMAGE_DOS_HEADER dos_header = (PIMAGE_DOS_HEADER)module_addr;
    if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) {
        return;
    }

    PIMAGE_NT_HEADERS nt_headers
        = (PIMAGE_NT_HEADERS)(module_addr + dos_header->e_lfanew);
    if (nt_headers->Signature != IMAGE_NT_SIGNATURE) {
        return;
    }

    uint32_t relative_addr
        = nt_headers->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]
              .VirtualAddress;
    if (!relative_addr) {
        return;
    }

    PIMAGE_DEBUG_DIRECTORY debug_dict
        = (PIMAGE_DEBUG_DIRECTORY)(module_addr + relative_addr);
    if (!debug_dict || debug_dict->Type != IMAGE_DEBUG_TYPE_CODEVIEW) {
        return;
    }

    struct CodeViewRecord70 *debug_info
        = (struct CodeViewRecord70 *)(module_addr
            + debug_dict->AddressOfRawData);
    if (!debug_info || debug_info->signature != CV_SIGNATURE) {
        return;
    }

    sentry_value_set_by_key(module, "debug_file",
        sentry_value_new_string(debug_info->pdb_filename));

    sentry_uuid_t debug_id_base
        = sentry__uuid_from_native(&debug_info->pdb_signature);
    char id_buf[50];
    sentry_uuid_as_string(&debug_id_base, id_buf);
    id_buf[36] = '-';
    snprintf(id_buf + 37, 10, "%x", debug_info->pdb_age);
    sentry_value_set_by_key(
        module, "debug_id", sentry_value_new_string(id_buf));

    snprintf(id_buf, sizeof(id_buf), "%08x%X",
        nt_headers->FileHeader.TimeDateStamp,
        nt_headers->OptionalHeader.SizeOfImage);
    sentry_value_set_by_key(module, "code_id", sentry_value_new_string(id_buf));
    sentry_value_set_by_key(module, "type", sentry_value_new_string("pe"));
}

static void
load_modules(void)
{
    HANDLE snapshot
        = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, GetCurrentProcessId());
    MODULEENTRY32W module = { 0 };
    module.dwSize = sizeof(MODULEENTRY32W);
    g_modules = sentry_value_new_list();

    if (Module32FirstW(snapshot, &module)) {
        do {
            HMODULE handle = LoadLibraryExW(
                module.szExePath, NULL, LOAD_LIBRARY_AS_DATAFILE);
            MEMORY_BASIC_INFORMATION vmem_info = { 0 };
            if (handle
                && sizeof(vmem_info)
                    == VirtualQuery(
                        module.modBaseAddr, &vmem_info, sizeof(vmem_info))
                && vmem_info.State == MEM_COMMIT) {
                sentry_value_t rv = sentry_value_new_object();
                sentry_value_set_by_key(rv, "image_addr",
                    sentry__value_new_addr((uint64_t)module.modBaseAddr));
                sentry_value_set_by_key(rv, "image_size",
                    sentry_value_new_int32((int32_t)module.modBaseSize));
                sentry_value_set_by_key(rv, "code_file",
                    sentry__value_new_string_from_wstr(module.szExePath));
                extract_pdb_info((uintptr_t)module.modBaseAddr, rv);
                sentry_value_append(g_modules, rv);
            }
            FreeLibrary(handle);
        } while (Module32NextW(snapshot, &module));
    }

    CloseHandle(snapshot);

    sentry_value_freeze(g_modules);
}

sentry_value_t
sentry_get_modules_list(void)
{
    sentry__mutex_lock(&g_mutex);
    if (!g_initialized) {
        load_modules();
        g_initialized = true;
    }
    sentry_value_t modules = g_modules;
    sentry_value_incref(modules);
    sentry__mutex_unlock(&g_mutex);
    return modules;
}

void
sentry_clear_modulecache(void)
{
    sentry__mutex_lock(&g_mutex);
    sentry_value_decref(g_modules);
    g_modules = sentry_value_new_null();
    g_initialized = false;
    sentry__mutex_unlock(&g_mutex);
}