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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* Preparation and completion of hprof data generation. The output is
* written into two files and then combined. This is necessary because
* we generate some of the data (strings and classes) while we dump the
* heap, and some analysis tools require that the class and string data
* appear first.
*/
#include "Hprof.h"
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>
#define kHeadSuffix "-hptemp"
hprof_context_t *
hprofStartup(const char *outputFileName, int fd, bool directToDdms)
{
hprofStartup_String();
hprofStartup_Class();
#if WITH_HPROF_STACK
hprofStartup_StackFrame();
hprofStartup_Stack();
#endif
hprof_context_t *ctx = malloc(sizeof(*ctx));
if (ctx == NULL) {
LOGE("hprof: can't allocate context.\n");
return NULL;
}
/* pass in name or descriptor of the output file */
hprofContextInit(ctx, strdup(outputFileName), fd, false, directToDdms);
assert(ctx->memFp != NULL);
return ctx;
}
/*
* Finish up the hprof dump. Returns true on success.
*/
bool
hprofShutdown(hprof_context_t *tailCtx)
{
/* flush the "tail" portion of the output */
hprofFlushCurrentRecord(tailCtx);
/*
* Create a new context struct for the start of the file. We
* heap-allocate it so we can share the "free" function.
*/
hprof_context_t *headCtx = malloc(sizeof(*headCtx));
if (headCtx == NULL) {
LOGE("hprof: can't allocate context.\n");
hprofFreeContext(tailCtx);
return false;
}
hprofContextInit(headCtx, strdup(tailCtx->fileName), tailCtx->fd, true,
tailCtx->directToDdms);
LOGI("hprof: dumping heap strings to \"%s\".\n", tailCtx->fileName);
hprofDumpStrings(headCtx);
hprofDumpClasses(headCtx);
/* Write a dummy stack trace record so the analysis
* tools don't freak out.
*/
hprofStartNewRecord(headCtx, HPROF_TAG_STACK_TRACE, HPROF_TIME);
hprofAddU4ToRecord(&headCtx->curRec, HPROF_NULL_STACK_TRACE);
hprofAddU4ToRecord(&headCtx->curRec, HPROF_NULL_THREAD);
hprofAddU4ToRecord(&headCtx->curRec, 0); // no frames
#if WITH_HPROF_STACK
hprofDumpStackFrames(headCtx);
hprofDumpStacks(headCtx);
#endif
hprofFlushCurrentRecord(headCtx);
hprofShutdown_Class();
hprofShutdown_String();
#if WITH_HPROF_STACK
hprofShutdown_Stack();
hprofShutdown_StackFrame();
#endif
/* flush to ensure memstream pointer and size are updated */
fflush(headCtx->memFp);
fflush(tailCtx->memFp);
if (tailCtx->directToDdms) {
/* send the data off to DDMS */
struct iovec iov[2];
iov[0].iov_base = headCtx->fileDataPtr;
iov[0].iov_len = headCtx->fileDataSize;
iov[1].iov_base = tailCtx->fileDataPtr;
iov[1].iov_len = tailCtx->fileDataSize;
dvmDbgDdmSendChunkV(CHUNK_TYPE("HPDS"), iov, 2);
} else {
/*
* Open the output file, and copy the head and tail to it.
*/
assert(headCtx->fd == tailCtx->fd);
int outFd;
if (headCtx->fd >= 0) {
outFd = dup(headCtx->fd);
if (outFd < 0) {
LOGE("dup(%d) failed: %s\n", headCtx->fd, strerror(errno));
/* continue to fail-handler below */
}
} else {
outFd = open(tailCtx->fileName, O_WRONLY|O_CREAT, 0644);
if (outFd < 0) {
LOGE("can't open %s: %s\n", headCtx->fileName, strerror(errno));
/* continue to fail-handler below */
}
}
if (outFd < 0) {
hprofFreeContext(headCtx);
hprofFreeContext(tailCtx);
return false;
}
int result;
result = sysWriteFully(outFd, headCtx->fileDataPtr,
headCtx->fileDataSize, "hprof-head");
result |= sysWriteFully(outFd, tailCtx->fileDataPtr,
tailCtx->fileDataSize, "hprof-tail");
close(outFd);
if (result != 0) {
hprofFreeContext(headCtx);
hprofFreeContext(tailCtx);
return false;
}
}
/* throw out a log message for the benefit of "runhat" */
LOGI("hprof: heap dump completed (%dKB)\n",
(headCtx->fileDataSize + tailCtx->fileDataSize + 1023) / 1024);
hprofFreeContext(headCtx);
hprofFreeContext(tailCtx);
return true;
}
/*
* Free any heap-allocated items in "ctx", and then free "ctx" itself.
*/
void
hprofFreeContext(hprof_context_t *ctx)
{
assert(ctx != NULL);
/* we don't own ctx->fd, do not close */
if (ctx->memFp != NULL)
fclose(ctx->memFp);
free(ctx->curRec.body);
free(ctx->fileName);
free(ctx->fileDataPtr);
free(ctx);
}
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