ADebug.cpp revision 9903589eacc655481acebc5b85632b3b84418bc9
1f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar/* 2f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * Copyright 2014 The Android Open Source Project 3f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * 4f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * Licensed under the Apache License, Version 2.0 (the "License"); 5f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * you may not use this file except in compliance with the License. 6f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * You may obtain a copy of the License at 7f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * 8f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * http://www.apache.org/licenses/LICENSE-2.0 9f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * 10f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * Unless required by applicable law or agreed to in writing, software 11f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * distributed under the License is distributed on an "AS IS" BASIS, 12f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * See the License for the specific language governing permissions and 14f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar * limitations under the License. 15f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar */ 16f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 17f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <errno.h> 18f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <stdlib.h> 19f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <ctype.h> 20f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 21f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#define LOG_TAG "ADebug" 22011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar#include <cutils/atomic.h> 23f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <utils/Log.h> 24f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <utils/misc.h> 25f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 26f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <cutils/properties.h> 27f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 28f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <ADebug.h> 29f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <AStringUtils.h> 30f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar#include <AUtils.h> 31f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 32f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnarnamespace android { 33f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 34f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar//static 359903589eacc655481acebc5b85632b3b84418bc9Lajos Molnarlong ADebug::GetLevelFromSettingsString( 369903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar const char *name, const char *value, long def) { 37f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar // split on , 38f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar const char *next = value, *current; 39f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar while (next != NULL) { 40f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar current = next; 41f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar next = strchr(current, ','); 42f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (next != NULL) { 43f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar ++next; // pass , 44f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 45f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 46f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar while (isspace(*current)) { 47f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar ++current; 48f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 49f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar // check for : 50f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char *colon = strchr(current, ':'); 51f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 52f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar // get level 53f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char *end; 549903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar errno = 0; // strtol does not clear errno, but it can be set for any return value 559903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar long level = strtol(current, &end, 10); 56f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar while (isspace(*end)) { 57f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar ++end; 58f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 59f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (errno != 0 || end == current || (end != colon && *end != '\0' && end != next)) { 60f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar // invalid level - skip 61f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar continue; 62f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 63f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (colon != NULL) { 64f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar // check if pattern matches 65f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar do { // skip colon and spaces 66f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar ++colon; 67f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } while (isspace(*colon)); 68f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar size_t globLen = (next == NULL ? strlen(colon) : (next - 1 - colon)); 69f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar while (globLen > 0 && isspace(colon[globLen - 1])) { 70f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar --globLen; // trim glob 71f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 72f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 73f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (!AStringUtils::MatchesGlob( 74f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar colon, globLen, name, strlen(name), true /* ignoreCase */)) { 75f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar continue; 76f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 77f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 78f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 799903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar // update value 809903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar def = level; 81f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 82f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar return def; 83f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar} 84f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 85f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar//static 869903589eacc655481acebc5b85632b3b84418bc9Lajos Molnarlong ADebug::GetLevelFromProperty( 879903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar const char *name, const char *propertyName, long def) { 88f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char value[PROPERTY_VALUE_MAX]; 89f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (property_get(propertyName, value, NULL)) { 909903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar def = GetLevelFromSettingsString(name, value, def); 91f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 92f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar return def; 93f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar} 94f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 95f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar//static 969903589eacc655481acebc5b85632b3b84418bc9Lajos MolnarADebug::Level ADebug::GetDebugLevelFromProperty( 979903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar const char *name, const char *propertyName, ADebug::Level def) { 989903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar long level = GetLevelFromProperty(name, propertyName, (long)def); 999903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar return (Level)min(max(level, (long)kDebugNone), (long)kDebugMax); 1009903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar} 1019903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar 1029903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar//static 103f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnarchar *ADebug::GetDebugName(const char *name) { 104f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char *debugName = strdup(name); 105f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar const char *terms[] = { "omx", "video", "audio" }; 106f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar for (size_t i = 0; i < NELEM(terms) && debugName != NULL; i++) { 107f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar const char *term = terms[i]; 108f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar const size_t len = strlen(term); 109f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char *match = strcasestr(debugName, term); 110f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (match != NULL && (match == debugName || match[-1] == '.' 111f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar || match[len] == '.' || match[len] == '\0')) { 112f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar char *src = match + len; 113f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar if (match == debugName || match[-1] == '.') { 114f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar src += (*src == '.'); // remove trailing or double . 115f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 116f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar memmove(match, src, debugName + strlen(debugName) - src + 1); 117f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 118f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar } 119f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 120f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar return debugName; 121f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar} 122f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 123011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar//static 124011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnarbool ADebug::getExperimentFlag( 125011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar bool allow, const char *name, uint64_t modulo, 126011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar uint64_t limit, uint64_t plus, uint64_t timeDivisor) { 1279903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar // see if this experiment should be disabled/enabled based on properties. 1289903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar // default to 2 to allow 0/1 specification 1299903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar const int undefined = 2; 1309903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar long level = GetLevelFromProperty(name, "debug.stagefright.experiments", undefined); 1319903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar if (level != undefined) { 1329903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar ALOGI("experiment '%s': %s from property", name, level ? "ENABLED" : "disabled"); 1339903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar return level != 0; 1349903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar } 1359903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar 136011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar static volatile int32_t haveSerial = 0; 137011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar static uint64_t serialNum; 138011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar if (!android_atomic_acquire_load(&haveSerial)) { 139011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar // calculate initial counter value based on serial number 140011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar static char serial[PROPERTY_VALUE_MAX]; 141011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar property_get("ro.serialno", serial, "0"); 142011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar uint64_t num = 0; // it is okay for this number to overflow 143011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar for (size_t i = 0; i < NELEM(serial) && serial[i] != '\0'; ++i) { 144011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar const char &c = serial[i]; 145011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar // try to use most letters of serialno 146011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar if (isdigit(c)) { 147011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar num = num * 10 + (c - '0'); 148011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } else if (islower(c)) { 149011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar num = num * 26 + (c - 'a'); 150011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } else if (isupper(c)) { 151011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar num = num * 26 + (c - 'A'); 152011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } else { 153011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar num = num * 256 + c; 154011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } 155011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } 156011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar serialNum = num; 157011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar android_atomic_release_store(1, &haveSerial); 158011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar } 1599903589eacc655481acebc5b85632b3b84418bc9Lajos Molnar ALOGD("serial: %llu, time: %lld", (long long unsigned)serialNum, (long long)time(NULL)); 160011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar // MINOR: use modulo for counter and time, so that their sum does not 161011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar // roll over, and mess up the correlation between related experiments. 162011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar // e.g. keep (a mod 2N) = 0 impl (a mod N) = 0 163011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar time_t counter = (time(NULL) / timeDivisor) % modulo + plus + serialNum % modulo; 164011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar bool enable = allow && (counter % modulo < limit); 165011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar ALOGI("experiment '%s': %s", name, enable ? "ENABLED" : "disabled"); 166011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar return enable; 167011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar} 168011778fd4cb9606b68bfea1ed483d73c04fc6dcdLajos Molnar 169f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar} // namespace android 170f296e2b262d2a8f7c570eaed454a28cca99eb976Lajos Molnar 171