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Set exception whitelist check as earlier check instead of last check.

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When I first added the exception whitelist, I meant to put the check before
checking the location of the instruction pointer. (I didn't notice that it
was after the other check until now.) The whitelist check is to quickly rule
out minidumps, and if checking the instruction pointer provided any useful
information, it would be pretty indicative that the exception causing the
dump is interesting.

R=ivanpe@chromium.org

Review URL: https://codereview.chromium.org/1211253009

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1469 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
Liu.andrew.x@gmail.com 2015-07-07 21:30:06 +00:00
parent e2eb4505d0
commit fed2e33bd1
1 changed files with 15 additions and 15 deletions
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30
src/processor/exploitability_linux.cc
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@ -82,16 +82,27 @@ ExploitabilityRating ExploitabilityLinux::CheckPlatformExploitability() {
}
}
// Check if the instruction pointer is in a valid instruction region
// by finding if it maps to an executable part of memory.
uint64_t instruction_ptr = 0;
// Getting exception data. (It should exist for all minidumps.)
MinidumpException *exception = dump_->GetException();
if (exception == NULL) {
BPLOG(INFO) << "No exception record.";
return EXPLOITABILITY_ERR_PROCESSING;
}
const MDRawExceptionStream *raw_exception_stream = exception->exception();
if (raw_exception_stream == NULL) {
BPLOG(INFO) << "No raw exception stream.";
return EXPLOITABILITY_ERR_PROCESSING;
}
// Checking for benign exceptions that caused the crash.
if (this->BenignCrashTrigger(raw_exception_stream)) {
return EXPLOITABILITY_NONE;
}
// Check if the instruction pointer is in a valid instruction region
// by finding if it maps to an executable part of memory.
uint64_t instruction_ptr = 0;
const MinidumpContext *context = exception->GetContext();
if (context == NULL) {
BPLOG(INFO) << "No exception context.";
@ -108,17 +119,6 @@ ExploitabilityRating ExploitabilityLinux::CheckPlatformExploitability() {
return EXPLOITABILITY_HIGH;
}
const MDRawExceptionStream *raw_exception_stream = exception->exception();
if (raw_exception_stream == NULL) {
BPLOG(INFO) << "No raw exception stream.";
return EXPLOITABILITY_ERR_PROCESSING;
}
// Checking for benign exceptions that caused the crash.
if (this->BenignCrashTrigger(raw_exception_stream)) {
return EXPLOITABILITY_NONE;
}
return EXPLOITABILITY_INTERESTING;
}